User’s Guide
DCA/ACA CLAMP-ON MULTIMETER ADAPTOR
Model 380946
Introduction
Congratulations on your purchase of Extech's 30 Amp AC/DC Clamp-On MultiMeter
Adaptor. There is no need to break circuits when measuring current with a clamp device,
simply open the meter jaw and clamp around the conductor under test. Current is displayed
on the external DMM that is connected to the Adaptor.
Specifications
DC Ranges Output Accuracy
400mA DC 1mV/mA DC Not specified 1
4A DC 100mV/A ±(2.0%+3mA)
30A DC 10mV/A ±(2.0%+30mA)
AC Ranges 50/60Hz 40 to 100Hz
400mA AC 1mV/mA AC ±(2.0%+0.5mA) ±(2.5%+0.5mA)
50/60Hz 40 to 400Hz
4A AC (0 to 400mA) 100mV/A AC ±(2.5%+8mA) ±(3.0%+8mA)
4A AC (400 to 4A) 100mV/A AC ±(2.5%+3mA) ±(3.0%+6mA)
30A AC 10mV/A AC ±(2.0%+30mA) ±(2.5%+30mA)
Notes: Accuracy stated at 23oC ±5oC
1
The 400mA range is specified for AC measurements only. For DC measurements on this
range the typical accuracy is ±(2.5%+1mA) and the last digit may drift ± 4 counts.
Range DMM display
400mA 0.1mV / 0.1mA (400mA = 40.0mV)
4A 0.1mV / 1mA (4A = 400mV)
30A 0.1mV / 10mA (30A = 300mV)
Jaw size 0.9” (23mm) max
Power 2 1.5V AA batteries
Low Battery indication Red LED
Power consumption 10mA (approximately)
Operating Temperature: 14° to 122°F (-10 to 50
Storage Temperature: -4° to 140°F (-20 to 60
Relative Humidity: 80% to 88°F (31
Altitude: Operating below 2000 meters
Dimensions: 7.2 x 2.5 x 1.4” (183 x 61.3 x 35.6mm)
Weight: 6.7oz (190g)
o
C), <85% R.H.
o
C), <75% R.H.
o
C), decreasing linearly to 50% at 104°F (40oC)
Safety
Safety Symbols
WARNING: This indicates that a potentially hazardous condition which, if not avoided,
CAUTION: This indicates that a potentially hazardous condition which, if not avoided,
Safety Precautions
1. WARNING: Improper use of this meter can cause damage, shock, injury or death.
2. Make sure any covers or battery doors are properly closed and secured.
3. Use great care when making measurements if the voltages are greater than
4. Remove the battery if the adaptor is to be stored for long periods.
This symbol, adjacent to another symbol or terminal, indicates the user must
refer to the manual for further information.
This symbol, adjacent to a terminal, indicates that, under normal use,
hazardous voltages may be present
could result in death or serious injury.
could result in injury or damage to the meter.
Read and understand this user's manual before operating the meter.
25VAC rms or 35VDC. These voltages are considered a shock hazard.
380946 4/01 Rev. 1.0
Panel Description
1
2
1 Transformer jaw
2 Jaw trigger
3 On/Off and range selection switch
4 Zero button
5 Power-On LED
6 Low battery LED
7 Output terminals
Current Measurements
3
5
4
6
7
1. Set the DMM to the mV or low voltage range (ACV for AC measurements or DCV
for DC measurements).
2. Determine the highest anticipated reading and set the range accordingly. Start
with the 30A range if unsure.
3. Connect the RED connector lead to the multimeter’s '+' Voltage
terminal and the BLACK lead to the '-' Common terminal.
4. For DC measurements, hold the adaptor in the same
orientation as it will be held during the measurement and press
the Zero button (No conductor in the jaw).
5. Press the Jaw Trigger to open the jaw and clamp around a
single conductor.
6. Read the Current on the DMM display.
.
Yes
No
380946 4/01 Rev. 1.0
Battery Replacement
When the low battery status LED indicator lights, the meter's batteries must be changed.
Open the rear battery compartment, replace the batteries, and close the compartment cover.
Warranty
EXTECH INSTRUMENTS CORPORATION warrants the basic instrument to be free of
defects in parts and workmanship for one year from date of shipment (a six month limited
warranty applies on sensors and cables). If it should become necessary to return the
instrument for service during or beyond the warranty period, contact the Customer Service
Department at (781) 890-7440 for authorization. A Return Authorization (RA) number must
be issued before any product is returned to Extech. The sender is responsible for shipping
charges, freight, insurance and proper packaging to prevent damage in transit. This warranty
does not apply to defects resulting from action of the user such as misuse, improper wiring,
operation outside of specification, improper maintenance or repair, or unauthorized
modification. Extech specifically disclaims any implied warranties or merchantability or
fitness for a specific purpose and will not be liable for any direct, indirect, incidental or
consequential damages. Extech's total liability is limited to repair or replacement of the
product. The warranty set forth above is inclusive and no other warranty, whether written or
oral, is expressed or implied.
All rights reserved including the right of reproduction in whole or in part in any form.
Copyright © 2001 Extech Instruments Corporation.
Tech Support Hotlines
781-890-7440 ext. 200
extech@extech.com
www.extech.com
380946 4/01 Rev. 1.0
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