Megger ICLAMP User manual

M
Megger Limited
Archcliffe Road, Dover
Kent CT17 9EN
England
T+44 (0)1 304 502101
F+44 (0)1 304 207342
[e-mail]
Megger
4271 Bronze Way, Dallas,
Texas 75237-1019
USA
T+1 214 333 3201
T+1 800 723 2861 (USA only)
F+1 214 331 7399
[e-mail]
Megger
Z.A. Du Buisson de la Couldre
23 rue Eugène Henaff
78190 TRAPPES
France
T+33 (0)1.30.16.08.90
F+33 (0)1.34.61.23.77
[e-mail]
Megger Pty Limited
Unit 26 9 Hudson Avenue
Castle Hill
Sydney NSW 2125
Australia
T+61 (0)2 9659 200
F+61 (0)2 9659 2201
[e-mail]
Megger Limited
110 Milner Avenue Unit 1
Scarborough Ontario M1S 3R2
Canada
T+1 416 298 9688 (Canada only)
T+1 416 298 6770
F+1 416 298 0848
[e-mail]
Megger products are distributed in 146 countries worldwide.
This instrument is manufactured in the USA.
The company reserves the right to change the
specification or design without prior notice.
Megger is a registered trademark
Part No. 6172-967_en_V03 Printed in England 1006
www.megger.com
M
ICLAMP USER GUIDE
GSafety Warnings
These safety warnings are provided to ensure the safety of personnel and proper operation of the
instrument.
■Safety warnings and precautions must be read and understood before the ICLAMP is used.
They must be observed during use.
■Do not leave the ICLAMP connected to the system under test when not in use.
■Do not touch circuit connections and exposed metalwork of the installation or equipment under
test.
■Do not use the ICLAMP or connect it to any external system if it shows any visible signs of
damage or if it has been stored for prolonged periods in unfavourable conditions.
■Do not use the ICLAMP or connect it to any external system if the casing is open or any parts of
the case are missing.
■Do not use the ICLAMP or connect it to any external system if the ICLAMP lead is damaged in
any way.
■Do not use the ICLAMP on live electrical conductors.
■Always connect the ICLAMP to the DET instrument before clamping it around the item being
tested.
■Always inspect the DET instrument, ICLAMP and connection cable prior to every use. Replace
any defective parts immediately.
■Always use extreme caution when clamping around bare conductors: under fault conditions,
potentially high voltages and currents may be present and may pose a shock hazard.
NOTE: THE INSTRUMENT MUST ONLY BE USED BY SUITABLY TRAINED AND
COMPETENT PERSONS.
Users of this equipment and/or their employers are reminded that National Health and Safety
Legislation requires them to carry out valid risk assessments of all electrical work so as to
identify potential sources of electrical danger and risk of electrical injurysuch as inadvertent short
circuits. Where the assessments show that the risk is significant then the use of fused test leads
may be appropriate.
The safety warnings provided in this document are indicative of safe practice and shall not be con-
sidered exhaustive. Additionally, they are not intended to replace local safety procedures where
the instrument is being used.
Symbols used on the ICLAMP are:
GCaution: refer to accompanying notes
tEquipment protected throughout by Double Insulation (Class II)
cEquipment complies with current EU directives

3. Close the ICLAMP around the conductor
under test.
4. Set the rotary selector switch to the
Aposition.
5. The ground current flowing in the
conductor will be displayed.
Resistance measurement using ART
1. Ensure the rotary selector switch is in the
position.
2. Connect the instrument as shown.
3. Close the ICLAMP around the conductor
under test.
4. Set the rotary selector switch to the 3P
or 4P position.
5. Press and release the button [by
holding the button, the resistance
measurement will be continually updated].
6. The instrument will perform pre-measure-
ment checks, the status of which will be
indicated on the display.
7. The three-terminal or four-terminal
resistance reading using ART will be dis-
played.
SPECIFICATIONS
Measurement range: 1mA to 1200 A
Transformation ratio:1000 : 1
Output signal: 1mA / A (1 A @ 1000 A)
Accuracy
1mA to 100 mA : ≤3% of reading
0.1 A to 1 A : ≤2% of reading
1 A to 10 A : ≤1% of reading
10 A to 100 A : ≤0.5% of reading
Operating temperature
-10°C to +50°C / 14°F to 122°F
0% to 85% RH at +35°C / 95°F
Storage temperature
-20°C to +70°C / -4°F to 158°F
Jaw opening: 57 mm maximum (2.3 in)
Maximum conductor size: 52 mm (2.1 in)
Insulation: Double insulation
Voltage rating: 600 V CAT III
Current rating: 1200 A for 20 minutes
Ingress protection: IP40
Safety
EN61010-2-032
EMC
EN 50081-1 Class B
EN 50082-2
Dimensions: 111 mm x 216 mm x 45 mm
(4.4 in x 8.5 in x 1.8 in)
Weight: 0.5 kg approximately (1.2lb)
TEST
TEST
OFF
PREPARATIONS FOR USE
1. Ensure that the ICLAMP jaw mating surfaces
are free of dust and contamination and that
they contact completely when the ICLAMP
is closed.
2. Currents carried by conductors in close
proximity to the ICLAMP may affect
calibration and reduce the accuracy of
measurements made.
CALIBRATION OF THE ICLAMP
The ICLAMP should be calibrated once at
each test site to take into account the effects
of transportation, temperature and humidity
on the ICLAMP.
1. Ensure the rotary selector switch is in the
position.
2. Connect the instrument as shown.3.
Connect the C1 and C2 terminals together
using the calibration lead supplied with the
ICLAMP [X and C terminals for DET3TC].
4. Ensure that the ICLAMP is not clamped
around a conductor.
5. Press and hold the button and
switch instrument ON to the A
setting using the selector switch.
6. Release the button.
7. Press and hold the button until a “0”
reading is obtained on the display
8. Close the ICLAMP around the calibration
lead which connects the C1 and C2
terminals [X and C terminals for DET3TC].
9. Press and hold the button until a
“100” reading is obtained on the display.
10. Switch the instrument using the
selector switch.
11. The instrument is now calibrated to the
ICLAMP and the calibration stored in non-
volatile memory.
OPERATION OF THE ICLAMP
Measurement of ground current
1. Ensure the rotary selector switch is in the
position.
2. Connect the instrument as shown.
OFF
OFF
TEST
TEST
TEST
TEST
OFF
ICLAMP
ICLAMP
Electrode
under test
ICLAMP
Installation
earthing
conductor
Potential spike
Electrode
under test
3 terminal
lead nul l
Curr ent spike
DET4TC
DET4TCR
DET4TC
DET4TCR
DET4TC
DET4TCR
DET4TC
DET4TCR