Keysight U1251B and U1252B User’s and Service Guide 5
WARNING
– Do not exceed any of the measurement limits defined in the specifications
to avoid instrument damage and the risk of electric shock.
– When working above 70 VDC, 33 VAC RMS or 46.7 V peak, exercise
caution – such range pose a shock hazard.
– Do not measure more than the rated voltage (as marked on the meter)
between terminals, or between terminal and earth ground.
– Double-check the meter’s operation by measuring a known voltage.
– For current measurement, turn off circuit power before connecting the
meter to the circuit. Always place the meter in series with the circuit.
– When connecting probes, always connect the common test probe first.
When disconnecting probes, always disconnect the live test probe first.
– Detach test probes from the meter before you open the battery cover.
– Do not use the meter with the battery cover or part of the cover removed
or loose.
– Replace the battery as soon as the low battery indicator flashes on
screen. This is to avoid false readings, which may lead to possible electric
shock or personal injury.
– Do not operate the product in an explosive atmosphere or in the presence
of flammable gases or fumes, vapor, or wet environments.
– Inspect the case for cracks or missing plastic. Pay extra attention to the
insulation surrounding the connectors. Do not use the meter if it is
damaged.
– Inspect the test probes for damaged insulation or exposed metal, and
check for continuity. Do not use the test probe if it is damaged.
– Do not use any other AC charger adaptor apart from the one certified by
Keysight with this product.
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