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Kewtech FC2000 Instruction Manual

Kewtech FC2000 Instruction Manual

Calibration check box

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Contents
1 Functions and accuracy ......................................................................................... 2
2 What's in the box? ................................................................................................. 3
3 Measuring reference values for ongoing accuracy records ...................................... 3
4 Checking Continuity performance .......................................................................... 4
4.1 The need to null test leads ........................................................................ 4
4.2 Instruments with a lead null function .......................................................... 4
4.2.1 Lead nulling ............................................................................. 4
4.2.2 Continuity check ....................................................................... 4
4.3 Instruments without a lead null function ...................................................... 5
4.3.1 Measuring lead resistance ......................................................... 5
4.3.2 Continuity check ....................................................................... 5
4.4 Tolerance examples ................................................................................. 5
5 Insulation Resistance checks ................................................................................. 6
6 Earth Fault Loop Impedance checks ...................................................................... 7
7 Residual Current Device checks ............................................................................. 9
1 Functions & accuracy
The Kewtech FC2000 provides a quick and simple method of checking the accuracy of
electrical installation test instruments.
It does not replace the calibration requirements but provides a ready check on instrument
accuracy helping to minimise incorrect certification and costly revisits to confirm installation
compliance.
The FC2000 provides accuracy checks for test instruments used to measure:
• Continuity
• Insulation Resistance
• Earth fault loop impedance
• Operation of Residual Current Devices.
Accuracy
Insulation Test
0.5MΩ
2.0MΩ
200MΩ
Continuity Test
0.5Ω
1.0Ω
2.0Ω
Loop Test
additional 1Ω or
100Ω switched in to
the Earth Loop
RCD
x 1
x 5
1 %
Voltage Rating to
1000V.
1%
2%
1% ± 20mΩ
Current Rating
1% ± 20mΩ
Current Rating (pulsed)
Current 1% of
Timer ± 1ms
range
Check Value
Acceptable range
30mA x 1 (30mA)
30 to 33mA
30mA x 5 (150mA)
143 to 165mA
30mA x 1 / 2 (15mA)
13.5 to 15mA
2 What's in the box?
1 × FC2000
1 × Power Lead
2 × Test leads for Continuity and Insulation Resistance checks
Calibration Certificate
The FC2000 is supplied with a Calibration Certificate. The measured values given on the
Check Label fitted in the lid and shown on the Calibration certificate are the actual resistance
values for each individual FC2000. These values may vary from the Nominal Value due to the
manufacturer's tolerances for the resistors used.
3 Measuring reference values for ongoing accuracy
records
The FC2000 is supplied with a Calibration Certificate. The measured values given on the
Check Label fitted in the lid are the 'actual' resistance values for each individual FC2000.
These values may vary from the Nominal Value due to the manufacturer's tolerances for the
resistors used.
When using the FC2000 for the first time each test instrument to be checked should be in
current calibration.
When the first set of tests for any instrument are undertaken:
• A separate test record sheet should be kept for each test instrument.
• Each test should be repeated 3 times to establish the initial test value for each particular
instrument.
• The value obtained over the three tests should be similar and within the instrument
manufacturer's tolerances.
• The average value over the three tests should be recorded on the instrument test record
as the Reference Value.
• It is this Reference Value which will be used for future accuracy checks on the instrument.
Rating
30mA AC type
30mA AC type
30mA AC type

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Summary of Contents for Kewtech FC2000

  • Page 1 These values may vary from the Nominal Value due to the manufacturer’s tolerances for the compliance. resistors used. The FC2000 provides accuracy checks for test instruments used to measure: When using the FC2000 for the first time each test instrument to be checked should be in • Continuity current calibration. • Insulation Resistance When the first set of tests for any instrument are undertaken: •...
  • Page 2 The FC2000 includes a ‘lead null’ position for the continuity test range. This can be used null terminal in the insulation resistance range.
  • Page 3 The insulation resistance tester is then operated in the normal way. As the FC2000 will be used to check the accuracy of the instrument it is strongly advised that both plugs (13A and IEC) used to connect the FC2000 to the supply and the 13A instrument •...
  • Page 4 Note: The FC2000 function for the 1 × IΔn and the 5 × IΔn test has a set operation time of 38ms ±1ms so the instrument being checked should display a value, subject to the instru- •...
  • Page 5 • The FC2000 automatically resets ready to test after a period of around 4 seconds The connection to the FC2000 is made using the instrument test lead which is fitted with a BS when the LED goes out. 1363 (13A) plug into the test socket. The selection switch is set to the RCD position and the •...
  • Page 6: Check Box

    FC2000 CHECK BOX User Manual Kewtech Corporation Limited Midas House, Unit 2b, Stones Courtyard, High Street, Chesham, Bucks HP5 1DE T: 01494 792 212 Issue 1 F: 01494 791 826 E: sales@kewtechcorp.com www.kewtechcorp.com www.kewtechcorp.com...