Safety and use
t This product is designed for use by a competent person with appropriate training
t Do not use the product if there are any signs of cracks or other damage –
To clean use only a dry cloth
t The Kewtech CAL BOX must be used in accordance with these instructions –
It must not be used in any other non-intended way
t The use of this device does not replace formal calibration, it is a simple check to
minimise the possibility of incorrect results being used for certification and the
subsequent revisits this would involve
t For more information on calibration visit www.esc.org.uk and download the
Electrical Safety Council free Best Practise Guide No 7
t The Kewtech CAL BOX is a sealed unit, there are no user serviceable components
t Do not connect to the mains.
INSTRUCTIONS
Continuity
Continuity checks are made using the right-hand 4mm terminals
If your tester has a null function connect the two leads to the two lower COM – NULL 4mm
terminals and ‘null out’ the test lead resistance value
To check values remove one test lead only and re-connect to the required value to check - make
the measurement and check the reading of your tester against the value selected
Insulation
Insulation checks are made using the left-hand 4mm terminals
There is no requirement to null the test leads for checking insulation values
Place one lead in a lower COM – NULL 4mm terminal
To check values connect the other test lead to the required value to check - make the
measurement and check the reading of your tester against the value selected.
(Do not exceed the maximum test voltage of 1000V DC)
Features
t Unlike most simple Check Boxes the Kewtech CAL BOX uses precision
components which give better than 2% accuracy
t Robust construction for reliable service
CAL BOX
Kewtechcorp.com
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