4 Keysight U1270 Series Service Guide
Safety Considerations
Read the information below before using this multimeter. The descriptions and
instructions in this manual apply to the Keysight U1271A, U1272A, U1273A, and
U1273AX Handheld Digital Multimeters (hereafter referred to as the multimeter).
The U1273A and U1272A models appear in all illustrations.
– Disconnect circuit power and discharge all high-voltage capacitors
before measuring resistance, continuity, diodes, or capacitance.
– Use the proper terminals, function, and range for your measurements.
– This device is for use at altitudes of up to 3000 m.
– Never measure voltage when current measurement is selected.
– Always use the specified battery type. The power for the meter is
supplied with four AAA 1.5 V batteries. Observe the correct polarity
markings before you insert the batteries to ensure proper insertion of the
batteries in the meter.
– You are advised to use low leakage batteries when changing to new
batteries. Please remember to remove the batteries when the meter is not
in use for a long period of time. Warning on the risk of battery leakage.
– To avoid damage to the instrument from battery leakage:
– Always remove dead batteries immediately.
– Always remove the batteries and store them separately if the
instrument is not going to be used or is being stored for a long period
of time.
– Do not use the multimeter if it is damaged. Before you use the
multimeter, inspect the case. Look for cracks or missing plastic. Pay
particular attention to the insulation surrounding the connectors.
– Inspect the test leads for damaged insulation or exposed metal. Check
the test leads for continuity. Replace damaged test leads before you use
the multimeter.
– Do not operate the multimeter around explosive gas, vapor, or wet
environments.
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