U1253B User’s and Service Guide V
• When working above 60 VDC, 30 VAC rms, or 42.4 VAC peak, exercise caution – such
range poses a shock hazard.
• Do not measure more than the rated voltage (as marked on the multimeter) between
terminals, or between terminal and earth ground.
• Double-check the meters operation by measuring a known voltage.
•For current measurement, turn off circuit power before connecting the multimeter to
the circuit. Always place the multimeter 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 multimeter before you open the battery cover.
• Do not use the multimeter 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.
• Inspect the case for cracks or missing plastic. Pay extra attention to the insulation
surrounding the connectors. Do not use the multimeter 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 adapter apart from the one certified by Agilent with
this product.
• Do not use repaired fuses or short-circuited fuse-holders. For continued protection
against fire, replace the line fuses only with fuses of the same voltage and current
rating and recommended type.
• Do not service or perform adjustments alone. Under certain condition, hazardous
voltages may exist, even with the equipment switched off. To avoid dangerous electric
shock, service personnel must not attempt internal service or adjustment unless
another person, capable of rendering resuscitation or first aid, is present.
• Do not substitute parts or modify equipment to avoid the danger of introducing
additional hazards. Return the product to the nearest Agilent Technologies Sales and
Service office for service and repair to ensure the safety features are maintained..
• Do not operate damaged equipment as the safety protection features built into this
product may have been impaired, either through physical damage, excessive
moisture, or any other reason. Remove power and do not use the product until safe
operation can be verified by service-trained personnel. If necessary, return the
product to the nearest Agilent Technologies Sales and Service office for service and
repair to ensure the safety features are maintained.
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