TB 9-6625-388-35
Table 1. Model Variations
Test instrument position/connections
Models
ZM-4/U1
5430AM1
5300 and 5305
RN-1
E3108
GA SENS switches
Same as ZM-4
None
Pushbuttons G and B
GA 1
RES-VAR-MUR
Same as ZM-4
R-MU-VR-M
None
RES-VARLEY-
switch
MURRAY
BA + - binding post
Same as ZM-4
BA +, 1 -
BA binding post no
BA +and unlabeled
numbers.
post
GA 1 and 2 binding
Same as ZM-4
GA + and
GA binding post no
GA binding post no
post
numbers.
numbers
BA switch INT-BA-
IN-BA-OUT
BA switch IN-
None
BA switch IN-OUT-
EXT
OUT
BA (depress to
read)
GA switch RMV-
Same as ZM-4
Same as ZM-4
None
GA switch IN-GA-
GA-HIL
OUT
GR and RH binding
Same as ZM-4
None
R binding post X1
R-GR
post
X1 and X2 binding
Same as ZM-4
X1 and X2
Neutral
Blk Red
Line 1 and 2
post
0
0
0
MULTIPLE BY,
MULTIPLE
Same as 5430AM1
RATIO 1000, 100, 10,
RATIO 1, 10, 100,
otherwise same
1/1000, 1/100,
1, .1, .01, .001
1000, M1000,
as 5430AM1
1/10, 1/9, 1/4,
M100, M10, M1,
1/1, 10/1, 100/1,
.001, .01, .1
M1000 M100,
M10
Decade switches 1,
Decade switches
Same as 5430AM1
Decade switches 1, 10,
Same as ZM-4
10, 100, 1000, 1-
1, 10, 100,
100, 1000, all 1-9
9, 1-9, 1-9, (O-
1000, 1-9, 1-9,
INF)
1-9, (O-INF)
1The
1-49( ) models are the same as the ZM-4( ) models except for connection/position locations.
Test instrument parameters
Performance specifications
Industrial Instruments Model RN-1 and Leeds and Northrop Models 5300, 5305, and 5430AM1
Ratio
Enclosed dial switch having even multiplying values: 0.001, 0.01, 0.1,
1, 10, 100, and 1000
Rheostat
Four decades 9 (1 + 10 + 100 + 1000) ohms
Decade accuracy
0.1% for 10-, 100-, and 1000-ohm steps; 0.25% for 1-ohm step
Bridge error
(0.15% + 0.01 ohm)
Models 5300, 5305, and 5430AM1)
Ratio accuracy
0.05%
Current rating max
1-ohm decade, 0.7A; 10-ohm decade, 0.22 A; 100-ohm decade, 0.07A;
1000-ohm decade, 0.022A
Galvanometer:
1
Sensitivity
1 A per scale division
Power requirement
4.5V (3 type-D flashlight cells)
3