AEMC instruments 6418 User manual

ENGLISH User Manual
GROUND TESTER 6418
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Clamp-On Ground Tester Model 6418
2141.03
6418
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Clamp-On Ground Tester Model 6418
Table of Contents
PRECAUTIONS FOR USE ..................................................... 5
1. INTRODUCTION ................................................................... 7
1.1. Function Keys .................................................................. 8
1.2. Display ............................................................................. 8
1.3. Inserting Batteries............................................................ 9
1.4. Date and Time Setup....................................................... 9
2. OPERATION .................................................................... 10
2.1. General .......................................................................... 10
2.2. Impedance and Current Measurement.......................... 10
2.3. Current Measurement.................................................... 12
2.4. Configuring (Set-up) .......................................................13
2.5. Errors ............................................................................. 15
2.6. Automatic Stop .............................................................. 15
2.7. Storage .......................................................................... 16
3. TECHNICAL CHARACTERISTICS ................................. 18
3.1. General Reference Conditions ...................................... 18
3.2. Electrical Characteristics ............................................... 18
3.3. Influences ...................................................................... 19
3.4. Power Supply................................................................. 22
3.5. Environmental Conditions.............................................. 22
3.6. Mechanical Characteristics............................................ 22
3.7. Compliance with International Standards ...................... 23
3.8. Electromagnetic Compatibility (EMC)............................ 23
4. MAINTENANCE ............................................................. 24
4.1. Cleaning......................................................................... 24
4.2. Battery Replacement ..................................................... 24
LIMITED WARRANTY .......................................................... 26
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Clamp-On Ground Tester Model 6418
PRECAUTIONS FOR USE
This instrument is compliant with safety standard IEC 61010-2-032, for
voltages up to 100V in category IV or 150V in category III. Failure to
observe the safety instructions may result in electric shock, fire,
explosion, and destruction of the instrument and of the installations.
The operator and/or the responsible authority must carefully read and
clearly understand the various precautions to be taken in use. The
operator and/or the responsible authority must carefully read and
clearly understand the various precautions to be taken in use. Sound
knowledge and a keen awareness of electrical hazards are essential
when using this instrument.
If you use this instrument other than as specified, the protection it
provides may be compromised, thereby endangering you.
The safety of any system in which this instrument might be
incorporated is the responsibility of the integrator of the system.
Do not use the clamp above its rated frequency, since this might
cause it to overheat dangerously.
Do not use the instrument on networks of which the voltage or
category exceeds those mentioned.
Observe the environmental conditions of use.
Do not use the instrument if it seems to be damaged, incomplete, or
poorly closed.
Before each use, check the condition of the insulation on the housing.
Any item of which the insulation is deteriorated (even partially) must
be set aside for repair or scrapping.
Before using your instrument, check that it is perfectly dry. If it is wet,
it must be thoroughly dried before it can be connected or used.
When handling the instrument, keep your fingers behind the physical
guard.
Avoid impacts on the measurement head, in particular the air gap.
Keep the surfaces of the air gap clean; even a little dirt can cause the
clamp to malfunction.
Use personal protection equipment systematically.
All troubleshooting and metrological checks must be done by
competent accredited personnel.
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Clamp-On Ground Tester Model 6418
Receiving Your Shipment
Upon receiving your shipment, make sure that the contents are
consistent with the packing list. Notify your distributor of any missing
items. If the equipment appears to be damaged, file a claim immediately
with the carrier and notify your distributor at once, giving a detailed
description of any damage. Save the damaged packing container to
substantiate your claim.
Ordering Information
Clamp-On Ground Tester Model 6418..............................Cat. #2141.03
Includes hard carrying case, 5 calibration loop, four 1.5V AA batteries,
wrist strap, Bluetooth adapter, multilingual safety sheet, Quick Start
Guide, and USB drive containing User Manual.
Replacement Parts
Hard Carrying Case ..........................................................Cat. #2141.52
5 Calibration Loop .........................................................Cat. #2141.51
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Clamp-On Ground Tester Model 6418
1.3. INSERTING BATTERIES
Refer to §4.2.
1.4. DATE AND TIME SETUP
The first time you turn ON the instrument by turning the switch to ,
the instrument prompts you to set the date.
The year blinks, indicating it can
.
blin
The instrument then displays the
time format. Choose 24h or 12h (A
hours reading blinks. Set it The minutes reading blinks. Set
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Clamp-On Ground Tester Model 6418
2. OPERATION
2.1. GENERAL
When turned ON, the instrument performs self-calibration. The jaws of
the clamp must therefore be closed and not clamped around any
conductor.
If the instrument fails to complete self-calibration, the error message Err.
CAL is displayed. If this happens, turn the instrument OFF and ensure
the air gaps are clean. Then turn the instrument ON.
2.2. IMPEDANCE AND CURRENT MEASUREMENT
Set the
switch to
.
Press the trigger to open the jaws,
and clamp around the conductor
that is part of the ground system
to be measured.
When the jaws are open, the
symbol
is displayed and the
instrument cannot make a
measurement.
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Clamp-On Ground Tester Model 6418
2.2.1. CONNECTION
The ground electrode to be measured (RX) is in a series/parallel
arrangement with other ground electrodes via the earth impedance (ZE)
and physical connection to other resistance paths (ZS). The measured
impedance will be slightly greater than RXassuming the downstream
impedance is very low. For example: If RXis 21 and ZS/R1-Rnis
effectively 0.6 the Model 6418 will read 21.6 .
During the impedance measurement, the instrument emits an
intermittent audible “beeping” signal. This is caused by the
measurement frequency that flows in the measurement head.
The sound can vary as a function of the frequency and amplitude
of the current measured. This sound is normal and cannot be
eliminated.
2.2.2. FREEZING AND/OR STORING A MEASUREMENT
When the measurement has stabilized, you can press the HOLD key to
freeze it and/or MEM to record it.
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Clamp-On Ground Tester Model 6418
3. TECHNICAL CHARACTERISTICS
3.1. GENERAL REFERENCE CONDITIONS
Quantities of influence Reference values
Temperature 73 ±5°F (23 ±3°C)
Relative humidity 50 ±10%RH
Supply voltage 6 ±0.2V
Electric field <1V/m
Magnetic field <40A/m
Operating position clamp horizontal
Position of the conductor in the jaws centered
Adjacent conductors carrying current in
impedance measurement
At least 3.9” (10cm)
Magnetic mass At least 3.9” (10cm)
Frequency 50Hz, sinusoidal
Level of distortion <0.5%
Current present in impedance measurement 0mA
The intrinsic uncertainty is the error defined under the conditions of
reference.
The operational uncertainty is the intrinsic uncertainty plus the
variation of the quantities of influence (position, supply voltage,
temperature) as defined in standard IEC 61557. The uncertainties are
expressed as a percentage of the reading (R) and as a number of
display counts (ct): ±(a%R+# ct).
3.2. ELECTRICAL CHARACTERISTICS
3.2.1. IMPEDANCE MEASUREMENTS
Particular conditions of reference
Inductance in series with the resistance: zero.
Specified
measurement
range
0.010 to 0.10 to 1.0 to 50 to
Resolution (ct)
Intrinsic
uncertainty ( )
± (1.5%R + ± (1.5%R + 2
ct)
± (1.5%R +
2 ct)
± (2.5%
R +
2 ct)
No-load voltage
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Clamp-On Ground Tester Model 6418
Specified
measurement
range
150 to 450 to 650 to
Resolution (ct)
Intrinsic
uncertainty ( )
± (5%R +
2 ct)
± (10%R +
2 ct)
± (15%R +
2 ct)
± (20%R
+ 2 ct)
No-load voltage
3.2.2 CURRENT MEASUREMENTS
Particular conditions of reference
Frequency of the signal 47 to 800Hz
Specified
measurement
range
0.500 to
9.950mA
10.00 to
99.90mA
100.0 to
299.0mA
0.300 to
2.990A
Resolution (ct) 50 µA 100 µA 1 mA 10 mA
Intrinsic
uncertainty ( )
± (2%R +
200 µA)
± (2%R + 1 ct) ± (2%R +
1 ct)
± (2%R +
1 ct)
Specified measurement range 3.00 to 20.00 A
Resolution (ct) 100 mA
Intrinsic uncertainty ( ) ± (2%R + 1 ct)
Beyond 20A and 800Hz, the clamp may overheat dangerously.
3.2.3. STORAGE
Number of records: 300.
3.3. INFLUENCES
Z = impedance
I = current
= intrinsic uncertainty given in §3.2.
ct = resolution given in §3.2.
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Clamp-On Ground Tester Model 6418
Impedance measurement:
Quantities of
influence
Range of
influence
Influence
Typical Maximum
Temperature -4 to 131°F (-
20 to
+ 55 °C) 0.5 / 10°C ± ct 1.5 / 10°C + ct
Relative
humidity
10 to 90% RH 1 ± ct 2 ± ct
Supply
voltage
4 to 6.5 V 0.05 ± ct 0.1 ± ct
Position of
conductor
from the edge to
the center 0.2 ± ct
Z 450
0.5 ± ct 0.4 ± ct
Z
1 ± ct
Position of
clamp +/- 180° Z < 450
0.25 ± ct
Z 450
0.5 ± ct 0.5 ± ct
Z
1 ± ct
Proximity to
magnetic
mass
Sheet steel
1mm thick
against air gap
0.1 ± ct 0.5 ± ct
Magnetic field
50/60Hz 30 A/m 0.05 ± ct 0.1 ± ct
Adjacent
conductor I < 40A Z < 250
0.25 ±
ct
Z 250
0.4 ± ct 0.5 ± ct
Z 250
0.8 ± ct
Leakage
current in the
grounding
system from
50 to 60Hz
I <10 A. ZxI
<75 V
Z <
Z x I <
20 V 0.5 ± ct 1 ± ct
20 V
Z x
I < 40 V 1 ± ct 3 ± ct
40 V
Z x I 2 ± ct 4 ± ct
Z 0.5 ± ct 1 ± ct
Ground
inductance 0 to 500 µH Instrument displays Z at measurement frequency (2083Hz)
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