A 1588
Multi range AC current clamps
9
Deterioration of insulation (because of pollution, moisture, corrosion). This is causing
a gradual increase of the resistive leakage current.
Faults in electronic equipment.
If the neutral and PE wiring are connected together anywhere in the installation this
can result in an improper current distribution through the neutral and PE conductors.
Note
Metrel Application note:
Measuring of leakage current
contain many practical aspects and
examples of leakage current measurement.
Maintenance
Inspection
To maintain operator safety and ensure reliability of the current clamp
it is good practice to
inspect it on a regular basis. Check that the enclosure and optional connection are without
defects such as scratches or breaks.
Jaw surface must be clean. Pollution on jaw surfaces reduces the current clamp sensitivity.
Cleaning
Use a soft cloth moistened with soapy water or alcohol to clean non-metallic surface of the
current clamps
and leave them to dry totally before using it.
!
Do not use liquids based on petrol or hydrocarbons!
!
Do not spill cleaning liquid over the current clamps!
To clean jaw cut surfaces use slightly oiled soft cloth.
Service And Calibration
It is essential that your clamp is regularly calibrated in order to guarantee the technical
specification listed in this User manual. We recommend 2-year calibration interval. Metrel
encloses an original calibration certificate with every new instrument and clamp.
For recalibration and repairs under or out of warranty time please contact your distributor for
further information.
!
Only a competent, authorized person is allowed to carry out service intervention!
Technical Specifications
General
Safety specification
Over voltage category: 600 V CAT II,
Pollution degree: 2
Double insulation
Environment conditions
Working temperature: -10
0
C ÷ 50
0
C
Storage temperature: -20
0
C ÷ 70
0
C
Humidity: 0 % ÷ 85 %,
Linearly decreasing for T > 35
0
C
Altitude:
2000 m
Applied standards
Mechanical data
Jaw opening: 40 mm
Maximum conductor sizes:
Cable: < 50 mm
Bar: 1 bar 50 mm x 5 mm,
4 bars 30 mm x 5 mm
Housing flammability: UL94
– V-1
Dimension: 177 mm x 53 mm x 23 mm
Weight: ~160 g
