Internal Battery Condition - Gardner Bender GMT-318 Manual Del Propietário

GMT-318 0415
adjustment screw clockwise or counterclock-
wise until the needle indicator is directly over
the three black zeros at the left end of the scale.
Analog Meter: Reading the Scale
AC Voltage Scale
dB Scale for
Battery Test Scale
Transistor Gain
General
Measurement
The first step in reading the analog scale is to
align the needle with the scale. This is
achieved by locating the mirror on the scale.
Line the needle up with its reflection. When
the reflection is hidden by the needle, the
needle is properly aligned.
Resistance (Ohms - Ω)
Use the top scale for reading the resistance.
DC Voltage (V DC)
Use the middle scale directly below the
resistance scale. Match the dial setting to the
highest number on the scale. If the setting
does not match one of the numbers, use a
scale that can be easily multiplied to give the
setting (i.e. - for 500V, use the 50V scale and
multiply the reading by 10).
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AC Voltage (V AC)
Use the same numbers and procedures as
used for the DC voltage setting, but use the
scale directly below the numbers.
Resistance
DC Milliamps
(Ohms)
Scale
Use the same scale and procedure as used
for the DC voltage setting.
Decibel Gain (dB)
Use the scale marked dB to read decibels for
DC Voltage
transistor gain. Use the chart at the right of
& Milliamps
the scale for proper conversion.
Scale
Common Markings

3.2 Internal Battery Condition

for both the AC & DC
Voltage Scales
Before making resistance or continuity tests,
check the condition of the internal battery. First
turn the function/range switch to the ohms Rx1
position. Short the test leads together and the
needle indicator should deflect to the right side
of the scale. Keep the test leads shorted
together while simultaneously turning the zero
ohms adjustment dial until the needle indicator
reads zero at the right side of the ohms
(green) scale. If the needle will not zero,
replace the battery with a new 1.5 volt AA size
non-rechargeable battery (see Battery
Replacement ).
4. DC Voltage Measurement
1) Fully seat the test leads in the correct input
jacks, (-) black lead, (+) red lead.
2) Set the function/range switch to the
appropriate DC voltage range. If the voltage
is unknown, use the highest range. If the
- see pg. 14
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