Elma Instruments Auto-Check 117, User Manual

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Elma 117 - 118 Page 52
HOLD
feature
The Hold feature freezes the display for later viewing. Press the HOLD button momentarily to
toggle to the Hold feature. The annunciator “ ” turns on.
Backlighted display (model 118 only)
Press the SELECT button for 1 second or more to turn on or off the display backlight feature.
Auto Power Off (APO)
The meter turns off intelligently after approximately 3 minutes of neither significant measurement
nor button/switch activity. To wake up the meter from APO, press any button or turn the rotary
selector to OFF and back on again. Always turn the rotary selector to OFF when the meter is not in
use.
5) 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.
Trouble Shooting
If the instrument fails to operate, check batteries and test 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.
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 batteries and store
them separately