Voltcraft VC-7055BT Manual
Voltcraft
Multimeter
VC-7055BT
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Side 1/59
i
Digital Multimeters
User Manual
■VC-7060BT
■VC-7200BT
ii
Table of Contents
1. Safety Information............................................................................................................ 1
Safety Terms and Symbols.............................................................................................................
1
General Safety Requirements........................................................................................................
2
Measurement Limits......................................................................................................................
3
Main Input Terminals (HI Input and LO Input) Measurement Limits........................................................3
Current Input Terminal (I) Measurement Limits
........................................................................................
3
Sense Terminals (HI Sense and LO Sense) Measurement Limits...............................................................
4
Measurement Category.................................................................................................................
4
2. Quick Start........................................................................................................................ 5
General Inspection.........................................................................................................................
5
Dimensions.....................................................................................................................................
6
Foot Stool Adjustment...................................................................................................................
6
Front Panel Overview.....................................................................................................................
7
Rear Panel Overview
......................................................................................................................
9
User Interface...............................................................................................................................
10
Power On......................................................................................................................................
11
Measurement Connections.........................................................................................................
11
3. Functions and Operations.............................................................................................. 13
To Set The Range..........................................................................................................................
13
Measurement Speed and Resolution..........................................................................................
14
Basic Measurement Functions.....................................................................................................
15
Measuring DC Voltage..............................................................................................................................
15
Measuring AC Voltage..............................................................................................................................
16
Measuring DC Current..............................................................................................................................
17
Measuring AC Current..............................................................................................................................
18
Measuring Resistance..............................................................................................................................
19
Continuity Test.........................................................................................................................................
21
Diode Test................................................................................................................................................
22
Measuring Capacitance............................................................................................................................
23
Measuring Frequency and Period............................................................................................................
24
Measuring Temperature..........................................................................................................................
25
Dual Display..................................................................................................................................
27
Triggering......................................................................................................................................
28
Auto Trigger.............................................................................................................................................
28
Single Trigger............................................................................................................................................
28
External Trigger........................................................................................................................................
29
iii
Math.............................................................................................................................................
30
Statistics...................................................................................................................................................
30
Limits........................................................................................................................................................
30
dB/dBm....................................................................................................................................................
31
Relative Value...........................................................................................................................................
31
Display..........................................................................................................................................
32
Number....................................................................................................................................................
32
Bar Meter.................................................................................................................................................
32
Trend Chart..............................................................................................................................................
33
Histogram.................................................................................................................................................
33
Data Record Function...................................................................................................................
35
Manual Record.........................................................................................................................................
35
Auto Record.............................................................................................................................................
36
Port Configuration........................................................................................................................
38
Serial.........................................................................................................................................................
38
Trigger......................................................................................................................................................
38
Output......................................................................................................................................................
38
Net Type...................................................................................................................................................
38
LAN.........................................................................................................................................................................38
Utility Menu.................................................................................................................................
39
Language..................................................................................................................................................
39
Backlight...................................................................................................................................................
39
Clock.........................................................................................................................................................
39
SCPI...........................................................................................................................................................
39
Default......................................................................................................................................................
39
System Info
...............................................................................................................................................
41
Update firmware......................................................................................................................................
41
LCD Test....................................................................................................................................................
42
Key Test
....................................................................................................................................................
42
4. Measurement Tutorial.................................................................................................... 43
Loading Errors (DC Voltage).........................................................................................................
43
True RMS AC Measurements.......................................................................................................
44
Loading Errors (AC Voltage).........................................................................................................
45
Application of the Analog Filter...................................................................................................
46
Crest Factor Errors (non-sinusoidal inputs).................................................................................
47
5. Troubleshooting.............................................................................................................. 48
6. Technical Specifications................................................................................................. 49
7. Appendix......................................................................................................................... 54
Appendix A: Enclosure.................................................................................................................
54
Appendix B: General Care and Cleaning......................................................................................
54
iv
Appendix C: Line Fuse Replacement...........................................................................................
55
1.Safety Information
1
1. Safety Information
Safety Terms and Symbols
Safety Terms
Terms in this Manual. The following terms may appear in this manual:
Warning: Warning indicates the conditions or practices that could result in
injury or loss of life.
Caution: Caution indicates the conditions or practices that could result in
damage to this product or other property.
Terms on the Product. The following terms may appear on this product:
Danger: It indicates an injury or hazard may immediately happen.
Warning: It indicates an injury or hazard may be accessible potentially.
Caution: It indicates a potential damage to the instrument or other property might occur.
Safety Symbols
Symbols on the Product. The following symbol may appear on the product:
Direct current (DC)
Warning, risk of electric shock
Alternating current (AC)
Caution, risk of danger (refer to this
manual for specific Warning or
Caution information)
Both direct and
alternating current
Conforms to European Union
directives
Ground terminal
Chassis Ground
IEC Measurement Category I. The maximum measurable
voltage is 1000 Vpk in the HI -LO terminal.
IEC Measurement Category II. Inputs may be connected to AC
mains power (up to 600 VAC) under Category II overvoltage
conditions.
This product complies with the WEEE Directive (2012/19/EC)
marking equipment. The affixed product label indicates that
you must not discard this electrical/electronic product in
domestic household waste.
1.Safety Information
2
General Safety Requirements
Before any operations, please read the following safety precautions to avoid any
possible bodily injury and prevent this product or any other products connected from
damage. In order to avoid any contingent danger, this product is only used within the
range specified.
Check AC power input setting according to the standards in your own country.
Use Proper Power Cord. Use only the power cord supplied with the product and
certified to use in your country.
Product Grounded. This instrument is grounded through the power cord grounding
conductor. To avoid electric shock, the grounding conductor must be grounded. The
product must be grounded properly before any connection with its input or output
terminal.
Limit operation to the specified measurement category, voltage, or amperage
ratings.
Check all Terminal Ratings. To avoid instrument damage and the risk of electric shock,
check all the Measurement Limits and markers of this product. Refer to the user's
manual for the Measurement Limits before connecting to the instrument. Do not
exceed any of the Measurement Limits defined in the following section.
Do not operate without covers. Do not operate the instrument with covers or panels
removed.
Use Proper Fuse. Use only the specified type and rating fuse for this instrument.
Avoid exposed circuit. Do not touch exposed junctions and components when the
instrument is powered.
Do not operate if in any doubt. If you suspect damage occurs to the instrument,
have it inspected by qualified service personnel before further operations.
Use your instrument in a well-ventilated area. Inadequate ventilation may cause
increasing of temperature or damages to the device. Please keep well ventilated and
inspect the intake regularly.
Do not operate in wet conditions. In order to avoid short circuiting to the interior of
the device or electric shock, please do not operate in a humid environment.
Do not operate in an explosive atmosphere.
Keep product surfaces clean and dry.
Only the qualified technicians can implement the maintenance.
1.Safety Information
3
Measurement Limits
The protection circuitry of the multimeter can prevent damage to the instrument and
protect against the danger of electric shock, when the Measurement Limits are not
exceeded. To ensure safe operation of the instrument, do not exceed the Measurement
Limits shown on the front panel, it is defined as follows:
The user-replaceable 10 A current-protection fuse is on the front panel. To maintain
protection, replace fuse only with fuse of the specified type and rating. About the
specified type and rating of the fuse, please refer to "7 Current Terminal Fuse" in "Front
Panel Overview" on page 8.
Main Input Terminals (HI Input and LO Input) Measurement Limits
The HI and LO input terminals are used for voltage, resistance, continuity, frequency
(period), capacitance, diode, and temperature test measurements. Two Measurement
Limits are defined for these terminals:
HI Input to LO Input Measurement Limit
The Measurement Limit from HI Input to LO Input is 1000 VDC or 750 VAC, which is
also the maximum voltage measurement. This limit can also be expressed as 1000
Vpk maximum.
LO Input to Ground Measurement Limit
The LO input terminal can safely "float" a maximum of 500 Vpk relative to ground,
where ground is defined as the Protective Earth Conductor in the AC mains power
cord connected to the instrument.
As implied by the above limits, the Measurement Limit for the HI input terminal is a
maximum of 1500 Vpk relative to ground when LO Input is at its maximum of 500 Vpk
relative to ground.
Current Input Terminal (I) Measurement Limits
The Measurement Limit from the current input terminal (I) to the LO Input terminal is 10
A (DC or AC). Note that the current input terminals will always be at approximately the
2.Quick Start
5
2. Quick Start
General Inspection
After you get a new multimeter, it is recommended that you should make a check on the
instrument according to the following steps:
1. Check whether there is any damage caused by transportation.
If it is found that the packaging carton or the foamed plastic protection cushion has
suffered serious damage, do not throw it away first till the complete device and its
accessories succeed in the electrical and mechanical property tests.
2. Check the Accessories
The supplied accessories have been already described in the Appendix A: Enclosure
of this Manual. You can check whether there is any loss of accessories with reference
to this description. If it is found that there is any accessory lost or damaged, please
get in touch with our distributor responsible for this service or our local offices.
3. Check the Complete Instrument
If it is found that there is damage to the appearance of the instrument, or the
instrument can not work normally, or fails in the performance test, please get in
touch with the our distributor responsible for this business or our local offices. If
there is damage to the instrument caused by the transportation, please keep the
package. With the transportation department or our distributor responsible for this
business informed about it, a repairing or replacement of the instrument will be
arranged by us.
2.Quick Start
6
Dimensions
(VC-7200BT, for example)
Foot Stool Adjustment
Unfold the foot stool on the bottom of the multimeter.
2.Quick Start
7
Front Panel Overview
Figure 2- 1 Front panel overview (VC-7060BT, for example)
Item
Name
Description
1
LCD
Display the user interface
2
Menu selection
Keys
Activate the corresponding menu
3
Operation Keys
Save
Collect data in manual record. The instrument saves
current reading each time the key is pressed. SeeSave
page 35, .Manual Record
Record
Access menus of manual record and auto record.
See page 35, .Data Record Function
Run/Stop
When the trigger source is set as Auto, start or stop auto
trigger.
When the trigger source is set as , the instrumentSingle
issues one trigger each time this key is pressed.
Math
Perform math operations (statistic, limits, dB/dBm, REL) on
the measurement results.
Utility
Set the auxiliary system function, including Language,
Backlight, Clock, SCPI, Set to default, System information,
LCD test, Key test.
Port
Set Serial, Trigger, Output connector, Net Type.
4
HI and LO Sense
Terminals
Signal input terminals, used for four-wire resistance
measurements.
2.Quick Start
8
5
HI and LO Input
Terminals
Signal input terminals, used for voltage, resistance,
continuity, frequency (period), capacitance, diode, and
temperature test measurements.
6
Range/Direction Keys
When the Range softkey is shown on the right menu, you
can press the key to switch between auto and
manual range. Press to enable manual range, and
increase or decrease the measurement range.
When setting a parameter, press to move the cursor,
press to increase or decrease the value.
7
Current Terminal
Fuse
The rating is 10 A, 250 VAC.
To replace the fuse:
Turn off the multimeter and remove the power cord. Use a
flat-blade screw driver to turn the fuse holder
counter-clockwise, and pull out the fuse holder. Put the
new specified fuse into the fuse holder, and insert the
assembly back into the instrument, turning the fuse holder
clockwise to lock it in place.
8
AC/DC Current Input
Terminals
Signal input terminals, used for AC/DC current
measurements.
9
Power button
Turn on/off the multimeter.
10
Measurement
Function Keys
DC or AC voltage measurements
DC or AC current measurements
Resistance, continuity, and diode measurements
Capacitance measurements
Frequency/Period measurements
Temperature measurements
11
Graph
Choose what is displayed: number, bar meter, trend chart,
or histogram.
12
Dual
Press this key to display the function list on the right menu,
select a function, if the function is supported, the reading
will be displayed in the Vice Display.
13
USB Connector
Connect with an external USB device, such as connect a
USB memory device to the instrument.
2.Quick Start
10
instrument.
User Interface
Figure 2- 3 User interface (Single display)
Figure 2- 4 User interface (Dual display)
Trigger Mode
Status Icon
Display
Description
Trigger
Auto trigger
Ext Trigger
External trigger
Icon
Description
LAN is connected
Connect as a slave device with PC
Auto record function is running
USB memory device is detected
Manual record
2.Quick Start
11
Power On
(1) Connect the instrument to the AC supply using the supplied power cord.
Warning:
To avoid electric shock, the instrument must be grounded properly.
(2) Press down the power button at the front panel, the screen shows the boot screen.
Measurement Connections
After selecting the desired measurement function, please connect the signal (device)
under test to the multimeter according to the method below. To avoid instrument
damage, do not discretionarily switch the measurement function when measuring.
DC Voltage Measurement
AC Voltage Measurement
DC Current Measurement
AC Current Measurement
2-wire Resistance Measurement
4-wire Resistance Measurement
2.Quick Start
12
Continuity Test
Diode Measurement
Capacitance Measurement
Frequency/Period Measurement
Temperature Measurement
3.Functions and Operations
13
3. Functions and Operations
To Set The Range
The instrument provides auto and manual range. In auto range, the multimeter selects a
proper range automatically according to the input signal; in manual range, you can use
the front panel key or menu softkey to set the range. The auto range can bring a lot of
convenience for users while the manual range provides higher reading precision.
1st Method: Use the front panel key to set the range.
When the Range softkey is shown on the right menu, you can press the key to
switch between auto and manual range. Press to enable manual range, and
increase or decrease the measurement range.
2nd Method: Select the range in the measurement function menu.
Select auto range: In the measurement function menu, press the Range softkey, select
Auto.
Select manual range: In the measurement function menu, press the Range softkey, select
a range except Auto.
Note:
When the input signal exceeds the current range, "overload” will be displayed.
By default, the range is set to Auto at power-on or after a reset.
Auto range is recommended if you are not sure about the measurement range in
order to protect the instrument and obtain accurate data.
The range of continuity test is fixed at 2 kΩ; the range of diode measurement is fixed at
2 V.
3.Functions and Operations
14
Measurement Speed and Resolution
The instrument provides three types of measurement speed:
" " speed is 5 reading/s; " " speed is 50 reading/s; " " speed is 150 reading/s.Low Mid High
In DCV, ACV, DCI, ACI and 2-wire / 4-wire resistance measurements, the measurement
speed is selectable.
The reading resolution of VC-7060BT is 4½.
The reading resolution of VC-7200BT can be 4½ or 5½ digits. The selection of
measurement speed affects the reading resolution. The multimeter automatically selects
a reading resolution according to the current measurement settings.
Relationship between measurement speed and reading resolution:
Function
Measurement speed
Reading resolution
DCV
ACV
DCI
ACI
2-wire/4-wire
resistance
"Low" speed
VC-7060BT
4½ digits
VC-7200BT
5½ digits
"Mid" speed
"High" speed
4½ digits
Continuity test
Fixed at "High" speed
4½ digits
Diode
Fixed at "High" speed
4½ digits
Capacitance
Fixed at "Mid" speed
4½ digits
(only display the first four digits)
Frequency/Period
Fixed at "Mid" speed
4½ digits
Temperature
Fixed at "Mid" speed
4½ digits
3.Functions and Operations
15
Basic Measurement Functions
Measuring DC Voltage
This section describes how to configure DC voltage measurements.
Operating Steps:
1. Enable the DCV measurement.
Press on the front panel to enter DCV measurement mode.
2. Connect the test lead.
3. Set the range.
Press the Range softkey to set the range. Auto range automatically selects the range
for the measurement based on the input.
Note:
1000 V input protection is available in all ranges.
VC-7200BT: 20% over range for all ranges except 1000 V range.
VC-7060BT: 10% over range for all ranges except 1000 V range.
If the reading exceeds 1050 V in 1000 V range, "overload" will be displayed.
4. Set the measurement speed.
Press the Speed softkey to switch between Low, Mid or High. See page 14,
Measurement Speed and Resolution.
5. Set the filter. (Optional operation)
Press the Filter softkey to turn on or off the AC filter. When the AC component exists
in the inputted DC signal, it can be filtered by the AC filter to make the measurement
data more exactly.
3.Functions and Operations
16
6. Set the input impedance. (Optional operation, only for 200 mV and 2 V range)
Press the Input Z softkey to select "10M" or "10G", specify the input impedance to
the test leads. The default is "10M".
In the range of 200 mV or 2 V, you can choose "10G" to reduce the loading error to
the measured object caused by the multimeter (refer to Loading Errors (DC Voltage)
on page 43).
Note:
10M: Set the input impedances in all ranges to 10 MΩ.
10G: Set the input impedances in ranges of 200 mV and 2 V to 10 GΩ, while in
ranges of 20 V, 200 V and 1000 V, the impedances are still 10 MΩ.
7. Set the relative value. (Advanced operation)
Press the Rel softkey to turn on or off the relative operation. For relative operation,
the multimeter subtracts the pre-specified value of REL operation from the actual
measurement result and displays the result. See page 31, Relative Value.
Measuring AC Voltage
This section describes how to configure AC voltage measurements.
Operating Steps:
1. Enable the ACV measurement.
Press on the front panel, press it again to enter ACV measurement mode.
2. Connect the test lead.
3. Set the range.
Press the Range softkey to set the range. Auto range automatically selects the range
for the measurement based on the input.
3.Functions and Operations
17
Note:
750 V input protection is available in all ranges.
VC-7200BT: 20% over range for all ranges except 750 V range.
VC-7060BT: 10% over range for all ranges except 750 V range.
If the reading exceeds 787.5 V in 750 V range, "overload" will be displayed.
4. Set the measurement speed.
Press the Speed softkey to switch between Low, Mid or High. See page 14,
Measurement Speed and Resolution.
5. Set the relative value. (Advanced operation)
Press the Rel softkey to turn on or off the relative operation. For relative operation,
the multimeter subtracts the pre-specified value of REL operation from the actual
measurement result and displays the result. See page 31, Relative Value.
Measuring DC Current
This section describes how to configure DC current measurements.
Operating Steps:
1. Enable the DCI measurement.
Press on the front panel to enter DCI measurement mode.
2. Connect the test lead.
3. Set the range.
Press the Range softkey to set the range. Auto range automatically selects the range
for the measurement based on the input.
Note:
The multimeter uses two kinds of fuses for current protection: the 10 A current
3.Functions and Operations
18
input fuse on the rear panel and the built-in 12 A current input fuse.
VC-7200BT: 20% over range for all ranges except 10 A range.
VC-7060BT: 10% over range for all ranges except 10 A range.
If the reading exceeds 10.5 A in 10 A range, "overload" will be displayed.
4. Set the measurement speed.
Press the Speed softkey to switch between Low, Mid or High. See page 14,
Measurement Speed and Resolution.
5. Set the filter. (Optional operation)
Press the Filter softkey to turn on or off the AC filter. When the AC component exists
in the inputted DC signal, it can be filtered by the AC filter to make the measurement
data more exactly.
6. Set the relative value. (Advanced operation)
Press the Rel softkey to turn on or off the relative operation. For relative operation,
the multimeter subtracts the pre-specified value of REL operation from the actual
measurement result and displays the result. See page 31, Relative Value.
Measuring AC Current
This section describes how to configure AC current measurements.
Operating Steps:
1. Enable the ACI measurement.
Press on the front panel, press it again to enter ACI measurement mode.
2. Connect the test lead.
3. Set the range.
Press the Range softkey to set the range. Auto range automatically selects the range
3.Functions and Operations
20
(4-wire Resistance)
2. Connect the test lead.
3. Set the range.
Press the Range softkey to set the range. Auto range automatically selects the range
for the measurement based on the input.
Note:
1000 V input protection is available in all ranges.
VC-7200BT: 20% over range for all ranges except 100 MΩ range.
VC-7060BT: 10% over range for all ranges except 100 MΩ range.
If the reading exceeds 105 MΩ in 100 MΩ range, "overload" will be displayed.
4. Set the measurement speed.
Press the Speed softkey to switch between Low, Mid or High. See page 14,
Measurement Speed and Resolution.
5. Set the relative value. (Advanced operation)
Press the Rel softkey to turn on or off the relative operation. For relative operation,
the multimeter subtracts the pre-specified value of REL operation from the actual
3.Functions and Operations
21
measurement result and displays the result. See page 31, Relative Value.
Tip:
If the measured resistance is small, relative operation is recommended in order to
reduce the error caused by test lead.
Both ends of the measured resistance should be placed far away from your hands
and desks that can conduct electricity; otherwise, the measurement result might
be inaccurate. The greater the measured resistance is, the greater the affect will
be.
Continuity Test
This section describes how to configure continuity test.
Operating Steps:
1. Enable the continuity test.
Press on the front panel, press it again to enter continuity test mode.
2. Connect the test lead.
3. Set the beeper.
Press the Beeper softkey to enable or disable the beeper. When the beeper is
enabled, the reading is below 30 Ω, the multimeter will beep continuously.
4. Set the short-circuit resistance.
Press the Threshold softkey to set the short-circuit resistance.
Press to move the cursor, press to increase or decrease the value. The
range for VC-7200BT is 0 Ω to 2400 Ω; the range for VC-7060BT is 0 Ω to 1100 Ω. The
3.Functions and Operations
22
default is 50 Ω.
5. Continuity measurements behave as follows:
VC-7200BT
VC-7060BT
Display and beep
≤ Short-circuit
resistance
≤ Short-circuit
resistance
Displays measured resistance and
beeps (if beeper enabled)
Short-circuit
resistance to 2.4 kΩ
Short-circuit
resistance to 1.1 kΩ
Displays measured resistance
without beeping
> 2.4 kΩ
> 1.1 kΩ
Displays "Open" with no beep
Diode Test
This section describes how to configure diode test.
Operating Steps:
1. Enable the diode test.
Press on the front panel, press it twice to enter diode test mode.
2. Connect the test lead.
3. Set the beeper.
Press the Beeper softkey to enable or disable the beeper. When the beeper is
enabled, the diode is connected, the multimeter will beep continuously.
4. Diode measurements behave as follows:
VC-7200BT
VC-7060BT
Display and beep
0 to 2 V
0 to 3 V
Displays measured voltage, and the multimeter beeps
when the voltage is below 0.7 V (if beeper enabled)
3.Functions and Operations
23
> 2 V
> 3 V
Displays "Open" with no beep
Measuring Capacitance
This section describes how to configure capacitance measurements.
Operating Steps:
1. Enable the capacitance measurement.
Press on the front panel to enter capacitance measurement mode.
2. Connect the test lead.
Tip: Please short contact the two feet of an electrolytic capacitor by using a test lead
before measuring the electrolytic capacitor.
3. Set the range.
Press the Range softkey to set the range. Auto range automatically selects the range
for the measurement based on the input.
Note:
1000 V input protection is available in all ranges.
VC-7200BT: 20% over range for all ranges except 10000 μF range.
VC-7060BT: 10% over range for all ranges except 10000 μF range.
If the reading exceeds 10500 μF in 10000 μF range, "overload" will be displayed.
4. Set the relative value. (Advanced operation)
Press the Rel softkey to turn on or off the relative operation. For relative operation,
the multimeter subtracts the pre-specified value of REL operation from the actual
measurement result and displays the result. See page 31, Relative Value.
3.Functions and Operations
24
Measuring Frequency and Period
When measuring AC voltage or AC current, you can use the dual display function to
obtain the measured signal’s frequency and period (see page 27, ), or pressDual Display
to measure the frequency or period directly.
This section describes how to configure frequency and period measurements.
Operating Steps:
1. Enable the frequency/period measurement.
Press on the front panel to enter frequency/period measurement mode.
Press the Freq/Period softkey to switch between frequency and period.
2. Connect the test lead.
3. Set the range.
Press the Range softkey to set the range. Auto range automatically selects the range
3.Functions and Operations
25
for the measurement based on the input.
Note:
Frequency range: 20 Hz to 1 MHz.
Period range: 0.05 s to 1 μs.
750 V input protection is available in all ranges.
4. Set the relative value. (Advanced operation)
Press the Rel softkey to turn on or off the relative operation. For relative operation,
the multimeter subtracts the pre-specified value of REL operation from the actual
measurement result and displays the result. See page 31, Relative Value.
Measuring Temperature
This section describes how to configure temperature measurements. Temperature
measurements require a temperature transducer probe. The supported probes are type B,
E, J, K, N, R, S, T thermocouples, and PT100, PT385 platinum RTD sensor.
Operating Steps:
1. Enable the temperature measurement.
Press on the front panel to enter temperature measurement mode.
2. Connect the test lead.
3. Set the sensor configuration file.
Press the Load softkey, press to select thermocouple or thermo resistor. Press
to access the list, press to select the desired configuration file. Press the
3.Functions and Operations
26
Define softkey to view the configuration; press the Done softkey to apply the sensor
configurations.
4. Set the display.
Press the Display softkey to set the display mode of the result.
Temp Val: only the temperature value will be displayed;
Meas Val: only the measurement value will be displayed.
All: both the temperature value (on the main display) and the measurement value
will be displayed.
5. Set the temperature unit.
Press the Units softkey to display temperature in (degrees Celsius), (degrees℃ ℉
Fahrenheit), or K (Kelvin).
The conversion relations between these units are:
℉ ℃= (9/5) × + 32
K + 273.15≈℃
6. Set the relative value. (Advanced operation)
Press the Rel softkey to turn on or off the relative operation. For relative operation,
the multimeter subtracts the pre-specified value of REL operation from the actual
measurement result and displays the result. See page 31, Relative Value.
3.Functions and Operations
27
Dual Display
Using dual display function, you can view the readings of two measurement functions
simultaneously.
Figure 3- 1 Dual Display
Operating Steps:
1. Press one of the measurement function keys to turn on the primary measurement
function.
2. Press on the front panel, the secondary function list is shown on the right
menu, select the desired function.
3. When dual display is enabled, press to switch the primary function and the
secondary function. To configure the secondary function, you can switch it to the
primary function, configure in the right menu, then switch back.
4. Press any of the measurement function keys to disable the dual display.
The primary measurement functions and their associated secondary measurements are:
(gray back color indicates valid combinations)
Primary measurement function
DCV
DCI
ACV
ACI
FREQ
PERIOD
2WR
4WR
CAP
Secondary
DCV
DCI
ACV
ACI
FREQ
PERIOD
2WR
4WR
CAP
Note:
The multimeter makes the primary and secondary measurements alternately, the
primary and secondary readings update respectively.
If the primary measurement uses dB or dBm scaling, the dual display can not be
enabled. When the dual display is enabled, turning on dB or dBm scaling will
automatically disable the dual display.
When the dual display is enabled, manual record function can save both of the
primary and secondary readings, auto record function can only save the primary
reading.
3.Functions and Operations
28
Triggering
The multimeter provides three types of triggers: auto, single and external.
Auto Trigger
Press the front panel key, press the Trigger softkey, press the Source softkey to
select Auto. When Auto trigger is used, the instrument continuously takes measurements,
automatically issuing a new trigger as soon as a measurement is completed.
Press the Delay softkey to select Auto or Manual.
Auto Delay
The instrument automatically determines the delay based on function, range and
measurement speed.
Manual Delay
The first sample starts one trigger delay time after the trigger. The second sample starts
one sample interval after the start of the first sample, and so on.
Set the trigger delay time: Press the Delay softkey to select Manual, press to
move the cursor, press to increase or decrease the value. The range is 1 ms to
999,999 ms.
Set the number of samples: The multimeter takes the specified number of readings
each time a trigger signal is received. Press the Samples trigger softkey, press to
move the cursor, press to increase or decrease the value. The range is 1 to
999,999.
Single Trigger
Press the front panel key, press the Trigger softkey, press the Source softkey to
select Single. When Single trigger is used, the instrument takes one or specified number
of readings each time the front panel key is pressed.
Auto delay is applied for single trigger, the instrument automatically determines the
delay based on function, range and measurement speed.
You can set the number of samples for single trigger. The multimeter takes the
specified number of readings each time a trigger signal is received. Press the Samples
3.Functions and Operations
29
trigger softkey, press to move the cursor, press to increase or decrease
the value. The range is 1 to 999,999.
External Trigger
Press the front panel key, press the Trigger softkey, press the Source softkey to
select External. When External trigger is used, the multimeter receives the trigger pulse
from the [Ext Trig] connector at the rear panel, triggers at the specified edge of the pulse
signal and acquires measured data.
Auto delay is applied for external trigger, the instrument automatically determines the
delay based on function, range and measurement speed.
When using external trigger, you can set the edge type for the pulse from the [Ext Trig]
connector at the rear panel. The multimeter will trigger on the specified type of edge.
Press the Trg Edge softkey to select Rising or Falling.
3.Functions and Operations
30
Math
The multimeter provides these math functions: statistics, limits, dB/dBm and relative.
Statistics
Statistics calculates the min, average, max, span, standard deviation and number of
samples of readings during the measurement.
Press the front panel key, press the Statistics softkey, press the Statistics softkey
to select Show.
Remarks
The value is the minus the .Span Max Min
Press the Clear Readings softkey to clear reading memory and restart statistics.
Limits
Limit checking indicates how many samples have exceeded specified limits, and indicates
the signal testing result exceeded specified limits. The [ ] connector at theAUX Output
rear panel can be configured to output a pulse when the limits are exceeded (see page 38,
Output).
Press the front panel key, press the Limits softkey to access the limits menu.
Press the Limits softkey to enable or disable limits.
Use the High or Low softkey to specify the limits as high and low values. Press to
switch to the Center or Span softkey to specify the limits as a span around a center
value. For example, a Low limit of -5 V and a High limit of +10 V are equivalent to a
Center of 2.5 V and a Span of 15 V. When setting a parameter, press to move the
cursor, press to increase or decrease the value.
Press the Clear softkey to clear all current readings and restart limit checking.
Limit Indications: The red background color (shown below) indicates that the displayed
measurement exceeds the limits, and the multimeter beeps (if beeper enabled).
3.Functions and Operations
32
Press the front panel key, press the Rel softkey, set the preset value of the
present function.
In the measurement function menu, press the Rel softkey to turn on or off the relative
operation.
Display
Press the front panel key to access the menu, press the Display softkey to select
the display type as number, bar meter, trend chart, or histogram.
In each display type, you can press on the front panel, and select the secondary
function. For example, for the DCV measurement function, you can select ACV as the
secondary measurement function. See page 27, .Dual Display
Number
Press the front panel key to access the menu, press the Display softkey to select
Number, the instrument displays readings as a number. It is the default display type.
Bar Meter
Press the front panel key to access the menu, press the Display softkey to select
BarMeter. The bar meter adds a moving bar below the standard Number display.
Press the Scale softkey to select Default or Manual.
Produkt Specifikationer
| Mærke: | Voltcraft |
| Kategori: | Multimeter |
| Model: | VC-7055BT |
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