©
National Instruments Corporation
37
SCC-SG Series Strain-Gauge Modules User Guide
Replacing Resistors
The SCC-SG
XX
all have socketed resistors so you can easily replace them.
A typical 1/4 W size resistor should fit in the socket. Refer to the
section for socket dimensions.
Replacing the Quarter-Bridge Completion Resistors
To replace a quarter-bridge completion resistor on the SCC-SG01/02,
complete the following steps:
1.
Remove the screw from the back (wide unlabeled side).
2.
Turn the front (wide labeled side) toward you.
3.
Place the screw-terminal receptacle to the left.
4.
Slide the top cover to the right.
5.
Lift off the cover.
6.
Locate the completion resistor and replace it with a resistor that
matches the value of the strain-gauge element actively measuring
strain. Refer to Figure 28 to locate the completion resistor.
Figure 28.
SCC-SG0
X
Parts Locator Diagram
1
R9 Quarter-Bridge Completion Resistor for ACH(
X
)
(SCC-SG01 and SCC-SG02 only)
2
R5 Nulling Resistor for ACH(
X
+8)
3
R1 Nulling Resistor for ACH(
X
)
4
R6 Offset Nulling Adjustment for ACH(
X
)
5
R7 Offset Nulling Adjustment for ACH(
X
+8)
6
R19 Quarter-Bridge Completion Resistor for ACH(
X
+8)
(SCC-SG01 and SCC-SG02 only)
6
3
1
4
5
2
