Elma Instruments 5706445410286, Руководство пользователя

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Elma BM 251s-257s side 30
Disabling Auto-Power-Off
Press the SELECT button while turning the meter on to temporarily disable the Auto-Power-Off (APO)
feature. Turn the rotary switch OFF and then back on to resume.
Maintenance
WARNING
To avoid electrical shock, disconnect the meter from any circuit, remove the test leads from the input
jacks and turn OFF the meter before opening the case. Do not operate with open case. Install only the
same type of fuse or equivalent
Cleaning and Storage
Periodically wipe the case with a damp cloth and mild detergent; do not use abrasives or solvents. If the
meter is not to be used for periods of longer than 60 days, remove the battery and store it separately
Trouble Shooting
If the instrument fails to operate, check battery, fuses, leads, etc., and replace as necessary. Double
check operating procedure as described in this user’s manual
If the instrument voltage-resistance input terminal has subjected to high voltage transient (caused by
lightning or switching surge to the system) by accident or abnormal conditions of operation, the series
fusible resistors will be blown off (become high impedance) like fuses to protect the user and the
instrument. Most measuring functions through this terminal will then be open circuit. The series fusible
resistors and the spark gaps should then be replaced by qualified technician. Refer to the LIMITED
WARRANTY section for obtaining warranty or repairing service.
Battery and Fuse replacement
Battery use: 1.5V AAA Size battery x 2
Fuse (F1) for

AmA current input: 0.4A/1000V ac & dc, IR 30kA, F fuse; Dimension: 6 x 32
mm
Fuse (F2) for A current input: 11A/1000V ac & dc, IR 20kA, F fuse; Dimension: 10 x 38mm
Battery and Fuse replacement:
Loosen the screw from the access cover of the case bottom. Lift the access cover. Replace the batteries
or fuse. Re-fasten the screw.