Posts about GMT-312 written by GB Technical Service. Meter Fuses and Leads: Model: Available Leads: Fuse: NOTES: 530: OBSOLETE: F-4 F-6: 3005.
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or current than the set range of the
multimeter will allow.
4)
Do not touch the metal
probes of the test leads when making a
measurement.
5) Replace worn test leads. Do not use test
leads with broken or tattered insulation. Only
test leads meeting ETL, cETL, CAT II 300V IA can be used in this multimeter.
6) Discharge a capacitor before measuring it.
7) Remove the test leads from the circuit being
measured as soon as the test is completed.
8)
Do not measure voltage
when the function/range switch is set on
the resistance (ohms) or the current (mA) settings. Never measure current when the meter is set on the resistance range. Never measure AC voltage when the meter is set on DC voltage or DCmA. Setting the meter on the incorrect function may burn out some of the internal circuitry and may pose a safety hazard.
3. Operating Suggestions
1) Set the function/range switch to the proper
position before making a measurement.
When the voltage or current is not known, it MUST be determined that the capacity of the selected range will handle the amount of voltage or current in the circuit (see #3 under
For Your Safety). Always start with the
highest range in the function. If the
reading falls within the range of a lower setting, reset the function/range switch to
!
WARNING
!
WARNING
Gb Instruments Multimeter Instructions
6
5
the appropriate setting for greater accuracy.
2) Avoid placing the meter in areas where
vibration, dust or dirt are present. Do not
store the meter in excessively hot, humid or damp places. This meter is a sensitive measuring device and should be treated with the same regard as other electrical and electronic devices.
3) Using the meter in areas with high magnetic
fields can result in inaccurate readings. For
greatest accuracy, lay the meter flat on a non-metallic surface.
4) When the meter is not in use, keep the
function/range switch in the OFF position.
This keeps the needle indicator from deflecting or ”bouncing” excessively.
5) When disconnecting the test leads from
the unit, always grasp the leads where the
input jacks meet the meter housing. Never pull the leads out of the jacks by the insulated wire or transport the meter using the test leads as a carrying strap.
6) Never immerse the meter in water or
solvents. To clean the housing use a damp
cloth with a minimal amount of mild soap.
7) If the resistance (ohms) function of the
meter is not going to be used for a week or
more, remove the internal battery to avoid potential leaks that may damage the unit.
3.1 Preliminary Adjustments
Gmt 312 Multimeter Manual
Fully seat the test leads in the correct input
jacks. If necessary, using a small flat tip screwdriver, slowly turn the mechanical zero Gb Instruments Gmt 312 Manual
GMT-312 5-09 manual.qxp 5/21/09 3:04 PM Page 6
Gb Instruments Gmt 312 Manual Pdf
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