3. OPERATION
3.1 How it Works
Connect the instrument under test to the checkbox via the 4mm
terminals on the front of the checkbox. Select a resistance value
via the dial on the front of the checkbox. Set the instrument under
test to the relevant test range and either check the values or run
an insulation test to check the values are within the appropriate
limits.
We suggest that you keep a record of these results so you can
compare your instruments’ performance over a period of time. This
helps to identify faults and can show if the accuracy is drifting over
time.
4. MAINTENANCE
4.1 Calibration
To maintain the integrity of the checkbox, Martindale Electric
recommends that it is returned at least once a year to an approved
Calibration Laboratory for recalibration and certification.
Martindale Electric is pleased to offer you this service. Please
contact our Service Department for details.
Email: [email protected]
Tel: 01923 650660
4.2 Cleaning
The unit may be cleaned using a soft dry cloth. Do not use moisture,
abrasives, solvents, or detergents, which can be conductive.
4.3 Repair & Service
There are no user serviceable parts in this unit. Return to Martindale
Electric if faulty. Our service department will quote promptly to repair
any fault that occurs outside the guarantee period.
4.4 Storage Conditions
The instrument should be kept in warm dry conditions away from
direct sources of heat or sunlight, and in such a manner as to
preserve the working life of the unit. It is strongly advised that the
unit is not kept in a tool box where other tools may damage it.
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