Keysight U1401B User’s and Service Guide 5WARNING – Inspect the test probes for damaged insulation or exposed metal, andcheck 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 byKeysight with this product.– Do not use repaired fuses or short-circuited fuse-holders. For continuedprotection against fire, replace the line fuses only with fuses of the samevoltage 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. Toavoid dangerous electric shock, service personnel must not attemptinternal service or adjustment unless another person, capable ofrendering resuscitation or first aid, is present.– Do not substitute parts or modify equipment to avoid the danger ofintroducing additional hazards. Return the product to the nearestKeysight Technologies Sales and Service Office for service and repair toensure the safety features are maintained.– Do not operate damaged equipment as the safety protection featuresbuilt into this product may have been impaired, either through physicaldamage, excessive moisture, or any other reason. Remove power and donot use the product until safe operation can be verified by service-trainedpersonnel. If necessary, return the product to the nearest KeysightTechnologies Sales and Service Office for service and repair to ensure thesafety features are maintained.CAUTION – Turn off circuit power and discharge all high-voltage capacitors in thecircuit before you perform resistance and capacitance measurements orcontinuity and diode tests.– Use the correct terminals, function, and range for your measurements.– Do not measure voltage when current measurement is selected.– Use only the recommended rechargeable battery. Ensure proper insertionof battery in the instrument, and follow the correct polarity.– Disconnect test leads from all the terminals during battery charging.
