Instruction Manuals. Gardner Bender product instruction manuals provide complete information on the operation of Gardner Bender products. Gardner Bender offers replacement instruction manuals for most models as free downloads. Gardner Bender Energy Usage Power Meter is designed to help you cut down your energy costs. Accurate, safe and reliable. 380462-NIST is a Precision Milliohm Meter (220-Volt). Performance 380462-NIST is a Precision Milliohm Meter (220-Volt). Performance for low resistance measurements. Equipped with a large 18 mm 1999-count LCD screen. Read online or download PDF. Page 4 / 26. Gardner Bender GMT-312 5 Function Analog Multimeter User Manual. Gardner Bender Equipment. Manuals Directory ManualsDir.com - online owner manuals library. Never measure AC voltage when the meter is set on DC voltage or DCmA. How to Use a GDT-11 Multimeter. Digital Multimeter image by TekinT from Fotolia.com. Gardner Bender’s GDT-11 is a handheld digital multimeter with a 3 1/2-digit liquid crystal numeric display. The meter measures volts for direct and alternating currents, resistance and DC current. Read the voltage indicated on the meter’s LCD.
Page 2: Specifications, Operating suggestions, Dc voltage measurement, Dc milliamp measurement 6. ac voltage measurement, Resistance/continuity measurement, 1 for your safety, 1 household batteries
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PROTECTION
2K /V DC AC
FUSE & DIODE
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1K
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TM
2
1. Introduction
The GMT-312 is an Analog Multimeter
capable of measuring 5 functions on 12
ranges. Small lightweight and rugged con-
struction. This meter was designed for the
homeowner, hobbyist and professional
needing to make electrical and electronic
equipment measurements.
ranges. Small lightweight and rugged con-
struction. This meter was designed for the
homeowner, hobbyist and professional
needing to make electrical and electronic
equipment measurements.
1.1 Meter Functions
Needle
Analog
Scale
Scale
Mechanical
Zero
Adjust
Screw
Zero
Adjust
Screw
Zero
Ohms
Adjust
ment
Ohms
Adjust
ment
Input Jacks
Function/
Range
Selector
Switch
Range
Selector
Switch
Contents
1. Introduction
1.1
Meter Functions
2. Specifications
2.1
For Your Safety
3. Operating Suggestions
3.1
Preliminary Adjustments
3.2
Internal Battery Condition
4. DC Voltage Measurement
4.1
Household Batteries
5. DC Milliamp Measurement
6. AC Voltage Measurement
6.1
Wall Receptacles
7. Resistance/Continuity
Measurement
7.1
Extension Cords
7.2
Fuses
7.3
Switches
8. Decibel Measurement
(Transistor Gain)
9. Battery and Fuse Replacement
10. Warranty
Gardner Bender Multimeter User Manual
11. Disposal
1
Figure 1
Battery/
Fuse
Cover
Fuse
Cover
GMT-312 5-09 manual.qxp 5/21/09 3:04 PM Page 2
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or current than the set range of the
multimeter will allow.
multimeter will allow.
4)
Do not touch the metal Bissell airram cordless upright vacuum user manual.
probes of the test leads when making a
measurement.
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.
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.
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
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
reading falls within the range of a lower
setting, reset the function/range switch to
!
WARNING
!
WARNING
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.
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.
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.
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.
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.
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.
more, remove the internal battery to avoid
potential leaks that may damage the unit.
3.1 Preliminary Adjustments
Fully seat the test leads in the correct input
jacks. If necessary, using a small flat tip
screwdriver, slowly turn the mechanical zero
jacks. If necessary, using a small flat tip
screwdriver, slowly turn the mechanical zero
GMT-312 5-09 manual.qxp 5/21/09 3:04 PM Page 6
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