UNI-T UT90C User Manual (English)

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Rules For Safe Operation (1)

To avoid possible electric shock or personal

injury, and to avoid possible damage to the Meter or

to the equipment under test, adhere to the following

rules:

l Before using the Meter inspect the case. Do

not use the Meter if it is damaged or the case

(or part of the case) is removed. Look for cracks

or missing plastic. Pay attention to the insulation

around the connectors.

l Inspect the test leads for damaged insulation

or exposed metal. Check the test leads for

continuity. Replace damaged test leads with

identical model number or electrical specifications

before using the Meter.

l When using the test leads, keep your fingers

l Do not apply more than the rated voltage, as

marked on the Meter, between the terminals or

between any terminal and grounding.

l When the Meter working at an effective voltage

over 60V in DC or 30V in AC, special care should

be taken from there is danger of electric shock.

l Use the proper terminals, function, and range

for your measurements.

l The rotary switch should be placed in the right

position and no any changeover of range shall

be made during measurement is conducted to

prevent damage of the Meter.

l Disconnect circuit power and discharge all high

-voltage capacitors before testing current,

resistance, diodes, continuity or capacitance.

l Start charging as soon as the power indicator

appears. With a low battery, the Meter might

Model UT90C: OPERATING MANUAL

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