4. Press to confirm this setting, the LCD displaysSET
5. This feature is not valid when carrying out
measurement with TC-K type thermocouple
6. HAL value cannot set higher than the LAL value.
DATA
This feature is to store the data measuring under infrared
mode.
1. The maximum number of data to be stored is 99.
2. When the storage is empty, it displays “--- . ---“
3. Under non-measurement mode, press and hold DATA
and for 8 seconds to clear the stored data, the
Thermometer beeps.
4. Under measurement mode, press buttonYELLOW
to toggle to DATA mode.
5. Press or to select the location of storing the data.
6. Press DATA to store the value.
TC-K Thermocouple Measurement
This feature is to measure temperature with K type
thermocouple.
1. Press button to toggle to T-C mode. TheYELLOW
LCD display shows OL before the thermocouple is
connected.
2. Connect the K type thermocouple, press the trigger to
start measuring. The LCD display shows the reading.
3. Release the trigger, the reading is kept, LCD shows
T-C. The temperature reading is shown on the bottom
of right hand side.
HOLD
The display will remain activated 8 seconds after the
trigger is released. HOLD appears in the upper middle
of the display. When the trigger is pulled again, the
Thermometer will begin measuring in the last function
selected.
Typical Measurements
This section describes a variety of measurements often
performed by technicians.
Operation Tips:
User could select to turn on or off the backlight
and laser whenever you are making readings with
the Thermometer. But if you are using USB to
power up the Thermometer, the two levels white
co lour b ack lig ht wil l b e on aut om atically.
Relatively high emissivity normally means emissivity
setting of about 0.95.
Relatively low emissivity normally means emissivity
setting of about 0.30.
When user cannot identify the emissivity of the
object to be measured, user could cover the surface
to be measured (temperature >150 ) with black
electric tape (emissivity of about 0.95). Allow time
for the tape to reach the same temperature as the
object to be measured. Measure and record the
temperature of the tape. Target the Thermometer to
the object to be measured, adjust the emissivity
setting to make it as the same temperature as the
tape. At this time, the Thermometer emissivity setting
is close to the emissivity of the object to be
measured, measurement could be started.
Testing Contactors (Starters)
1. Press to select emissivity. Press to selectSET /
relatively low emissivity for bright contacts, or 0.7 mid
level for darkened contacts.
2. Press button to select MAX.YELLOW
3. Measure line and load side of one pole without
releasing trigger
4. A temperature difference between the line and load
sides of a pole indicate increased resistance of one
point and a contactor may be failing.
Testing Enclosed Relays
1. Press and then press to set emissivity toSET /
relatively low for uninsulated connectors or relatively
high for plastic encased relays or for bakelite enclosed
relays or insulated connectors.
2. Press button to select MAX.YELLOW
3. Start to scan.
4. Measure the relay casing, looking for hot spots.
5. Measure electrical connections on relay terminals
looking for hot spots.
Testing Fuses and Buss Connections
1. Press and then press to set emissivity toSET /
relatively high for paper covered fuse body or insulated
connections.
2. Press button to select MAX.YELLOW
3. Scan the paper covered length of fuse.
4. Without releasing the trigger, scan each fuse. Unequal
temperatures between fuses may indicate voltage
or amperage imbalance.
5. Press and then pressSET / to set emissivity to
relatively low, for metal fuses and caps and insulated
buss connections.
6. Press button to select MAX.YELLOW
7. Scan each end cap on each fuse/
Note
Unequal temperatures or a high temperature indicates
loose or corroded connection through the fuse buss
spring clip.
Testing Electrical Connections
1. Press and then press to set emissivity toSET /
relatively low for uninsulated connectors or buss
connections or relatively high for insulated connections.
Note
Conductors are typically smaller than the Thermometer’s
spot size. If the spot size is bigger than the connector,
the temperature reading is the average within the spot.
2. Scan the conductor, moving toward direction of
electrical connector (quick connect, wire nut, buss
connection, or lug).
Scanning Walls for Air Leaks or Insulation
Deficiencies
1. Turn off heating, cooling, and blower.
2. Press SET to select emissivity. Press / to select
emissivity relatively high for painted surfaces or
window surfaces.
3. Press YELLOW button to select MIN when opposite
side of wall is at lower temperature and or select MAX
when opposite side of wall is at higher temperature.
4. Measure an interior partition wall surface temperature.
Do not release the trigger. Record this temperature
as your baseline (or benchmark) for a “perfectly”
insulated wall.
5. Face the wall to be scanned. Stand 1.2m away to
scan a 10cm spot on the wall.
6. Scan horizontal rows of wall from top to bottom, or
horizontal rows of ceiling from wall to wall. Look for
greatest deviations from baseline temperature to
identify problems. This completes the insulation test scan.
Turn on the blower (no heat, no cooling) and retest. If
test results with the blower on are different than results
with the blower off, this may indicate air leaks in
conditioned envelope walls. The air leaks are caused
by duct leaks that create a pressure differential across
the conditioned space envelope.
Testing Bearings
Warning
To avoid injury when testing bearings:
Do not wear loose clothing, jewelry, or anything
around neck when working around moving parts
such as motors, belts, blower, and fans.
Make sure an electrical disconnect is within
reach and operating correctly and freely.
Do not work alone.
Note
It works best to compare two similar motors operating
similar loads.
1. Press and then press SET / to select relatively
high emissivity.
2. Press button to select MAX. YELLOW
3. Enable motor and allow it to reach steady state
operating temperatures.
4. Disable the motor if possible.
5. Measure the two motor bearing temperatures
6. Compare the two motor bearing temperatures.
Unequal temperatures or a high temperature can
indicate a lubrication or other bearing problem that
is resulting from excess friction.
7. Repeat the sequence for the blower bearings.
Testing Belts and Sheaves
1. Press and then press SET / to select relatively
high emissivity.
2. Press button to select MAX.YELLOW
3. Enable the motor and allow it to reach a steady state
operating temperatures.
4. Aim the Thermometer at the surface to be measured.
5. Start recording temperature
6. Slowly move the Thermometer up the belt toward
second sheave.
If belt is slipping, sheave temperature will be high
from friction.
If belt is slipping, belt temperature will remain
high between sheaves.
If belt is not slipping, belt temperature will reduce
between sheaves.
If inner surfaces of sheaves are not a true “V”
shape, this indicates belt slippage and will continue
to operate at elevated temperatures until sheave
is replaced.
Sheaves must be properly aligned (include “pitch
& yaw”) for belt and sheaves to operate at appropriate
temperatures. A straight edge or taut string, can
be used to check alignments.
Motor sheave should operate at a temperature
consistent with blower sheaves.
If motor sheave is at a higher temperature at motor
shaft than at outer circumference, belt is probably
not slipping.
If outer circumference of sheave is at higher
temperature than sheave at motor shaft, then belt
is probably slipping and sheaves may be misaligned.
Checking Hydronic Radiant Heat Applications
Radiant heat tubes in the floor will normally run parallel
to the outside walls. Starting at the floor wall juncture,
scan parallel to the wall while moving into the room
away from the wall. Parallel to the outside wall you
should find parallel isothermal rows indicating the
location of heat tubes below the surface. Perpendicular
to the outside wall, you should find rising and falling
temperatures at equal distances. High temperatures
indicate you are scanning a heat tube beneath the floor
surface, low falling temperatures indicate a space
between the heat tubes.
1. Press and then press SET / to select relatively
high emissivity.
2. Press button to select MAX.YELLOW
3. To locate radiant heat tubes in floor, temporarily
elevate the loop temperature to create hotter spots
for identifying tubing runs.
4. Before releasing trigger, press button toYELLOW
toggle between MIN, MAX, DIF floor temperatures
and record the temperature for future comparison
and trending under similar conditions.
Measuring Grille, Register, or Diffuser Discharge
Temperature
1. Press and then press to select relativelySET /
high emissivity.
2. Aim the Thermometer at the discharge air grille,
register, or diffuser.
3. Measure discharge temperature.
4. Release trigger to freeze the temperature reading
for 8 seconds and record this temperature.
5. Grille, register, or diffuser temperature should be
equivalent to discharge temperature at the air handler.
Checking for Blockage in Air-To-Air Evaporators
or Condensers
1. Remove panels to gain access to coil return bends
or hairpins.
2. Press and then press SET / to select relatively
high emissivity for copper tube.
3. Start the refrigeration system.
4. Aim the Thermometer at coil turn bends/hairpins.
5. Start recording temperature.
6. Take temperature of each return bend/hairpin.
All evaporator return bends/hairpins should be at
or slightly above evaporator saturation temperature
from the pressure/temperature chart.
All condenser return bend/hairpins should be at or
slightly less than condenser saturation temperature.
If a group of return bends/hairpins do not conform
to expected temperatures, that indicates a blocked
or restricted distributor or distributor tube.
Maintenance
Changing the Battery
To install or change the 9V battery, open the battery
compartment the battery as shown in Figure 2.
Cleaning the Lens
Blow off loose particles using clean compressed air.
Carefully wipe the surface with a moist cotton swab.
The swab may be moistened with water.
Cleaning the Housing
Use soap and water on a damp sponge or soft cloth.
To avoid damage to the Thermometer, do not soak the
unit into water.
~ END ~
This operating manual is subject to change without notice.
; 600 :±3%＞ ℃
IR Accuracy
T-C Accuracy
to stated accuracy.
Display Resolution
；（＜ ℃ ℃ ＞ ℃ ℃ ℉）10 : 0.2 ; 999.9 :1 /1
Pointer Single laser pointer
wavelength: 630 to 670mm
Battery Life Alkaline: around 30 hours; Dry Zinc-Manganese:around 10hours
P/N:110401104358X DATE:2018.06.26 REV.5
