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+
P
RO
T
ECT
ION
2K
/V
DC
A
C
FU
S
E
&
D
IOD
E
200
30
40
60
20
100
1K
0
0
0
AC
D
C
30
60
90
120
150
10
20
3
0
40
2
4
6
8
50
10
AC
dB
DC
dB
B
A
T
10
8
6
5
4
3
2
1
0
B
AT
G
O
O
D
?
-
20
0
+8
+12
+16
+
18
+20
+
22
R
E
P
L
A
C
E
0
d
B
:
1
m
W
6
00
A
C
V
R
A
N
GE
1
0
5
0
10
3
0
A
D
D
dB
0
1
4
2
4
3
0
–
300
240
1
80
120
6
0
T
M
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.
1.1 Meter Functions
Needle
Analog
Scale
Mechanical
Zero
Adjust
Screw
Zero
Ohms
Adjust
ment
Input Jacks
Function/
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
11. Disposal
1
Figure 1
Battery/
Fuse
Cover
GMT-312 5-09 manual.qxp 5/21/09 3:04 PM Page 2
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