LT51 User Manual
iii
SAFETY WARNINGS
The LT51 Line Tester has been designed to meet the requirements of IEC
61010-1:2010 (Safety Requirements for Electrical Equipment for Measurement,
Control and Laboratory Use) and has been supplied in a safe condition. This
User Manual contains some information and warnings which have to be followed
by the user to ensure safe operation and to retain the instrument in a safe
condition.
NOTE: The LT51 Tester is intended for use by qualified personnel only
Use of this instrument in a manner not specified by these instructions may
impair the safety protection provided.
This instrument has been designed for indoor use in a Pollution Degree 2
environment in the temperature range 5°C to 40°C, 20% - 80% RH (non-
condensing). Do not operate while condensation is present.
Do not allow water to enter the instrument.
The maximum input to Earth of any RTX (a, b, g) terminal is 60 V dc / 30 V
rms / 42 V peak, and either TX (a, b) terminal is 60 V dc.
Never connect the LT51 to an outdoor circuit during lightning storms.
Disconnect all external cables before accessing the battery compartment.
There are no operator-serviceable parts inside. Do not open the case.
Should the LCD become damaged, the liquid crystal material can leak.
Avoid all contact with this material, especially swallowing. Use soap and
water to thoroughly wash all skin and clothing contaminated with the liquid
crystal material.
When using an AC-DC power source, use only the supplied AC-DC Adaptor
/ Charger to power or charge the LT51.
Do not use the LT51 if it operates abnormally or is damaged. Protection
may be impaired.
When servicing the LT51, use specified replacement parts only.
Refer to operating instructions for further explanation and precautions.
This product is not intended to be used to measure mains voltages (CAT I,
CAT II, III or IV) and should only be connected to powered circuits where
over-
voltage protection’s have been incorporated.
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