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. In addition, the unit has a diode check feature.

Preparing Meter and Battery

May 08, 2017 GB Electrical GMT-18A Compact 18 Range Analog Tester. The instruction manual says 'approx 109mm X 70mm X 33mm'. That converts to 4.3 X 2.8 X 1.3 inches, about what I measure with a ruler. With leads inserted, the 1.3' dimension becomes about 1.5'. The test leads do take up space beyond that occupied by the meter but not as much as implied. GB Instruments Digital Multimeter GDT-294A need user manual for GB instruments GDT-11 multimeter. What site provides a copy did not locate one on searches I did. Gb Instruments Gdt 292a Manual Manual For Gb Instruments Gdt 190a booklad.org GDT-294A lost owners manual, want to know which selector to. Plug the red test probe into the meter socket marked VΩmA. Plug the black test probe into the meter socket marked COM. Rotate the function selector knob to any setting other than OFF.If the display does not turn on, or if you see the BAT indicator on the display, replace the meter’s internal 9. 7 function a uto ranging digital multi-meter, Gdt -3200, Owners man ual. Read online or download PDF. Gardner Bender GDT-3200 Auto Multimeter User Manual. Instruction Manuals. GDT-311 Manual 3 Function Multimeter (New Style) manual: GDT-311 Manual 3 Function Multimeter (Old Style). Of the information and data on this site is for informational purposes only and is provided for the convenience of the user. Some information and data on may contain errors or inaccuracies, or there may be.

Snap the battery clip onto one of the batteries; set the battery aside for measuring voltage and current.

Plug the red test probe into the meter socket marked VΩmA.

Plug the black test probe into the meter socket marked COM.

Rotate the function selector knob to any setting other than OFF. If the display does not turn on, or if you see the BAT indicator on the display, replace the meter’s internal 9-volt battery with a fresh one.

Tip

Measurements of a 9-volt battery are safe as the voltage is too low to pose a shock hazard.

DC Voltage

Rotate the function selector knob until it points to the 20 range in the DC voltage scale, indicating a maximum of 20 volts. The DC voltage scale is indicated by the V-- symbol on the meter.

Touch the metal tip of the red meter probe to the positive wire of the battery clip; usually this is the red wire. Touch the tip of the black probe to the negative wire, which is black.

Read the voltage indicated on the meter’s LCD display. The meter should measure roughly 9 volts.

Tip

You can measure voltage or current with the probe polarity reversed; however, the meter will display a negative number. This does not adversely affect the meter or the components you’re testing.

Warning

Avoid touching the metal probe tips when measuring voltages greater that 50V; high voltages pose a shock hazard.

Resistance

Rotate the function selector knob until it points to the 200 range on the meter’s resistance scale, indicated by the Ω symbol.

Touch the red meter probe tip to one of the resistor’s leads. Touch the black probe to the remaining resistor lead.

Gb Instruments Gdt-292a User Manual

Read the resistance on the meter’s display. You should see a reading of about 100 ohms; a few percent higher or lower is normal.

Warning

Do not touch the metal probe tips when measuring resistance; the resistance of your skin will affect the meter’s accuracy.
Do not attempt to measure resistance for circuits or components that are powered on or have currents running through them; you might blow the meter’s fuse or damage the unit.

DC Current

Wrap the positive battery clip wire around one of the leads of the resistor.

Rotate the function selector knob until it points to the 200 range in the meter’s DC current scale, indicated by the A-- symbol.

Touch the tip of the red meter probe to the free lead of the resistor. Touch the tip of the black meter probe to the negative battery clip wire.

Read the current value on the meter’s display. You should see a reading of about 90 milliamps or .09 amps.

Warning

Do not attempt to measure currents in excess of 200 milliamps unless the red meter probe is plugged into the 10A DC socket and the selector knob points to the 10A-- range.

Always measure current with a resistance connected in series with a battery or other power source; the resistance limits the current and avoids a potentially damaging short circuit.

Advertising

or current than the set range of the
multimeter will allow.

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.

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

Gb Instruments Gdt-292a Manual

WARNING

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

Fully seat the test leads in the correct input
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

Advertising

Popular Brands

Popular manuals

Gb Instruments Gdt 292a User Manual