312, 316, 318
16
REL (S) (316, 318 only)
1. Press Q to set the zero to the present reading. The
difference between the reference reading and subsequent
readings is displayed.
2. Press
Q again and the Meter displays the reference
reading. The blinking S on the LCD also indicates this mode.
3. Press
Q for more than 2 seconds to return the Meter to
normal operation.
Range (312 only)
Press R to select the manual range mode. Manual shows on
the LCD, and the Meter remains in the same range. To exit
manual-range mode and return to the auto-range mode, press and
hold
R for 1 second.
Changing the Battery
When the battery voltage drops below the value required for proper
operation, the battery symbol (B) appears on the LCD.
1. Before changing the battery, switch the Meter off and
disconnect the test leads.
2. Open the back cover using a screwdriver.
3. Replace the battery with a new 9 V battery.
4. Close the back cover and fasten the screws.
Cleaning the Meter
Periodically clean the Meter by wiping it with a dry cloth. Do not
use abrasives or solvents on this instrument.
Maintenance
XWarning
• To avoid electrical shock, disconnect test leads from
the Meter before removing its back cover. Never use
the Meter with the back cover removed.
• Repairs or servicing not covered in this manual should
be performed only by qualified personnel.
Caution
• To avoid contamination or static damage, do not touch
the circuit board without proper static protection.
• If the Meter is not going to be used for a long time,
remove the battery. Do not store the Meter in a high
temperature or a high humidity environment.
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