KOMETEC Karl Oelkers e.K.
Mess- und Prüfgeräte · Shop
Mozartstr. 10 · D-88097 Eriskirch
T: 07541 / 955-1313 · F: 07541 / 955-1131
info@kometec.de · www.kometec.de
Flex current clamps
A 1179
A 1257
A 1395
User Manual
Version 1.6; Code No. 20 751 167
Distributor:
Producer:
METREL d.d.
Ljubljanska 77
SI-1354 Horjul
Tel.: +386 1 75 58 200
Fax: +386 1 75 49 226
E-mail: metrel@metrel.si
http://www.metrel.si
Mark on your equipment certifies that this equipment meets the requirements
of the EC (European Community) regulations concerning safety and
electromagnetic compatibility.
© 2007, 2008, 2012 Metrel
No part of this publication may be reproduced or utilized in any form or by any means
without permission in writing from METREL.
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A 1179, A 1257, A 1395 Flex current clamps
Table of contents
1 Introducing the A1179/A1257/A1395 ........................................................................ 4
2 Features ................................................................................................................... 4
3 Safety ....................................................................................................................... 5
4 Symbols .................................................................................................................... 6
5 Output connecting ..................................................................................................... 6
6 Using A1179/A1257/A1395 Flexible Current Clamps ............................................... 7
6.1 Battery and charging ........................................................................................... 7
6.1.1 New battery cells or cells unused for a longer period.................................... 7
6.2 User interface ..................................................................................................... 8
6.2.1 A1179/A1257/A1395 states regarding power supply .................................... 9
6.2.2 A1179/A1257/A1395 states regarding measuring ranges ........................... 10
7 Measuring current with A1179/A1257/A1395 .......................................................... 12
8 Cleaning .................................................................................................................. 13
9 Service .................................................................................................................... 13
10 Technical specifications .......................................................................................... 14
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A 1179, A 1257, A 1395 Flex current clamps
1 Introducing the A1179/A1257/A1395
The A1179/A1257 (A1179 has measuring ranges 20A/200A2000A, A1257 has
measuring ranges 30A/300/3000A) Flexible Current Clamps consist of three flexible
sensors and an electronic module. The A1395 has measuring ranges 30A/300/3000A
and two flexible sensors and an electronic module.
A current measurement can be carried out on the two/three phases
simultaneously, with a suitable output voltage for the Measuring ANALYZER /
Multimeter. The flexible sensor permits measurements on conductors where standard
clamp-on current transformers can not be used. It is particularly useful for installation in
tight spaces, or around breaker panels, cable bundles, wide or large bus bars and
irregular shapes. Unlike standard current transformers, this flexible CP does not use
magnetic cores. The transformation principle is based on an air core. It presents
virtually no load to the system under test, has a low phase shift and excellent frequency
response.
The electronic module can detect if the measured current amplitude is too big for
the selected range (crest factor of the amplifier is 3.0). This overrange detection is
indicated by a blinking range LED diode for currently selected range. If the overrange
current was detected but is not currently present, the user can reset the blinking Range
LED by pressing the key. If the overrange is present also when the key is pressed, the
range will be changed to the less sensitive range. The electronic module has low
battery indication as well.
Additionally, A1179/A1257/A1395 cannot be damaged by overloads. The
A1179/A1257/A1395 Flexible Current Clamps are insensitive to DC current and
measure only the AC component of the measured signal.
2 Features
Direct connection to 1V AC input on measuring device, and optional connection to
other meters (data logger, multi-meters,etc.),on demand
Switch ON, switch OFF and two/three measuring ranges with one key selection
(2000/3000 Arms, 200/300 Arms and 20/30 Arms)
Overrange indication for measurement circuitry (blinking LED at corresponding
range)
mV output
Waterproof sensor
Minimum angle shift to accomplish accurate power measurements
High accuracy
Simultaneous measurement of the two/three phases
Total rejection of d.c.component
Friendly-use of the closing-opening system of the current sensor (even if wearing
gloves) due to its highly ergonomic design
It is possible to set the seal on the closing system of the current clamp.
Very light, flexible and fully adaptable to busbar trunking system and insulated
cables
Strengthened security, regardless the working environment:industrial or services
Possibility of external power supply at 220 V a.c./12 V d.c.
Build in charger (Low Bat LED on)
Low battery indication (blinking Low Bat LED)
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A 1179, A 1257, A 1395 Flex current clamps
3 Safety
Read the operating instructions before use and follow all safety instructions.
If the test equipment is used in a manner that is not specified in this user manual,
the protection provided by the equipment might be impaired!
Adhere to local and national safety codes. Individual protective equipment must
be used to prevent shock and arc blast injury where hazardous live conductors
are exposed.
Before each use, inspect the Current Clamps and its latching system for any
damage. Pay particular attention to the insulation surrounding the flexible
measuring head. Look for cracks or missing portions of the clamp housing or
output cable insulation. Also look for loose or weakened components.
Do not use a clamp that is cracked, damaged, or has a defective cable.
Never use the clamp on a circuit with voltages higher than 1000 V CAT III or
600V CAT IV.
De-energize the installation on which current will be measured or adopt safe
operating procedures during application and removal of the current clamp.
Use extreme caution when working around bare conductors or bus bars.
Do not use the Current Clamp to measure bare conductors carrying a voltage
from 30V up to 1000V unless you are wearing protective clothing suitable for
high-voltage work. Contact with the conductor could result in electric shock.
Always use appropriate equipment for personal protection.
Use caution when working with voltages above 60 V dc, 30 V ac rms or 42 V ac
peak. Such voltages pose a shock hazard.
Do not expose the A1179/A1257/A1395 unit to water.
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