Extech CA250 Manual

Extech Måling CA250

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User’s Guide Model CA250

400A AC/DC Current Clamp-on MultiMeter Adaptor

CA250-en-EU_V1.5 8/14

Introduction

Congratulations on your purchase of

the Extech CA250 400 Amp AC/DC

Clamp-On MultiMeter Adaptor. With

this clamp adaptor, a current can be

measured by simply clamping around

a single conductor. The adaptor

outputs an mV signal that is

proportional to the measured current

and displayed on a DMM. Careful use of this device will provide years of

reliable service.

Specifications

Measurement Ranges 0 to 40 Amps AC/DC

0 to 400 Amps AC/DC

Adaptor Output 10mV/Amp on the 0 to 40A range

1mV/Amp on the 0 to 400A range

Frequency range 50/60Hz

Safety

EN61010-1 and IEC61010-1 2nd Edition (2001)

to Category III 600V and Category IV 300V;

Pollution Degree 2 in accordance with IEC 664

indoor use.

Standards

Accuracy 0 to 40A ± (2.5% + 0.1A)

0 to 400A ± (2.8% + 0.5A)

Jaw size 30mm (1.2")

Operating Conditions 0 to 50

C (32 to 122

F) < 70% RH

Storage Conditions -20 to 70

C (-4 to 158

F) < 80% RH

Battery 2 – 1.5V “AAA”

Dimensions/Weight 146 x 60 x 32mm (5.8 x 2.3 x 1.3");

226g (8oz)

Safety

Safety Symbols

This symbol, adjacent to another symbol or terminal,

indicates the user must refer to the manual for further

information.

This symbol indicates that double insulation is used.

WARNING: This indicates that a potentially hazardous condition which,

if not avoided, could result in death or serious injury.

Safety Precautions

1. WARNING: Improper use of this meter can cause damage, shock,

injury or death. Read and understand this manual before operating

the meter.

2. Inspect the condition of the test leads and the meter itself for any

damage before operating the meter. Repair or replace any damage

before use.

3. Do not use on non-insulated conductors at voltages greater than

600VAC rms or DC.

You, as the end user, are legally bound (EU Battery

ordinance) to return all used batteries, disposal in the

household garbage is prohibited! You can hand over your

used batteries / accumulators at collection points in your

community or wherever batteries / accumulators are sold!

Disposal: Follow the valid legal stipulations in respect of the

disposal of the device at the end of its lifecycle

Current Measurements

NOTE: This device has a 30-minute automatic shut-off feature

1. Set the DMM range to AC mV when measuring AC amps and DC

mV when measuring DC amps or to the lowest voltage range.

2. Connect the RED test lead to the DMM '+' Voltage terminal and

the BLACK lead to the '-' COM terminal.

3. Set the adaptor to the 40A (AC or DC) or the 400A (AC or DC)

range.

4. Press the Jaw Trigger to open the jaw and clamp around a single

conductor.

5. The unit will output an AC or DC voltage proportional to the

measured current. (40A range:10mV/A, 400A range:1mV/A)

6. Read the voltage on the DMM display and interpret as

current.(direct mV to A on the 400A range, divide by 10 on the

40A range)

1. Read mV

2. Set to AC or DC mV

3. Voltage Input

4. NCV detector

5. NCV indicator

6. DC Zero adjust

DC Zero

A hysteresis voltage may appear when the clamp is set to the DC

position. With no conductor in the jaw, adjust the DC Zero adjust until

the DMM display indicates zero. If the voltage is beyond the range of

the zero adjust, snap the jaw open and shut several times to clear the

hysteresis. Set DMM to DC mV range.

Note: Verify the zero or re-zero the unit prior to all DC current

measurements and range changes.

Note: DC current measurements are polarity sensitive. Reverse the

conductor direction in the jaw to change the polarity.

Note: Do not apply voltage to the clamp adaptor’s test leads

Note: Clamp a single conductor only, do not clamp the hot and neutral

simultaneously.

Note: The clamp jaws must be fully closed for proper measurements.

On large conductors or line splitters, make sure there is no gap

between the upper and lower jaw.

Non-Contact AC Voltage Measurements

1. Touch the probe tip to the hot conductor or hold next to the hot

side of the electrical outlet.

2. If AC voltage is present, the detector LED will illuminate.

Allrightsreservedincludingtherightof orreproductioninwhole in inpart anyform

ISO‐9001Certified

www.extech.com

WARNING: Risk of Electrocution. Before use, always test the

Voltage Detector on a known live circuit to verify proper operation

Produkt Specifikationer

Mærke:	Extech
Kategori:	Måling
Model:	CA250

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