Before each use, check the condition of the insulation on the leads, housing, and accessories. Any
item of which the insulation is deteriorated (even partially) must be set aside for repair or scrapping.
Use only the leads supplied. The use of leads of a lower voltage rating or category limits the use of the
combined instrument + leads to the lowest category and service voltage.
Do not use the instrument in an explosive or dust-laden atmosphere.
When handling the test probes, keep your fingers behind the physical guard.
Use personal protection equipment systematically.
All troubleshooting and metrological checks must be done by competent, accredited personnel.
1.1. DELIVERY CONDITION
Delivered in blister pack with:
two 1.5V batteries (AAA or LR3),
one set of two leads each terminated by a probe tip,
one type K thermocouple,
one multilingual safety data sheet,
one user's manual in five languages.
1.2. INSERTING THE BATTERIES
Lift the prop.
Using a small cross-headed screwdriver, unscrew the screws of the battery compartment cover.
Withdraw the battery compartment cover.
Insert the two batteries provided (AAA or LR3 1.5V alkaline batteries).
Put the battery compartment cover back in place. Make sure that it is completely and correctly closed,
then screw the screws back in.
1.3. DISPLAY UNIT
When the display unit indicates OL, it is because the quantity measured lies outside the measurement range.
1.4. PRESENTATION OF THE INSTRUMENT
The DMM53 is an easy-to-use hand-held digital multimeter.
It can measure AC and DC voltages, AC and DC currents, resistances, capacitances, frequencies, and
temperatures. It can also be used to determine duty cycles, diode voltages, and continuities and for non-
contact voltage detection (NCV).
1. PRESENTATION
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