SCC-SG Series Strain-Gauge Modules User Guide
38
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Replacing the Nulling Resistors
To replace a nulling resistor on the SCC-SG0
X
or SCC-SG24, 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 nulling resistor and replace it. Refer to Figures 28 and 29 to
locate the nulling resistors.
Figure 29.
SCC-SG24 Parts Locator Diagram
Note
Replacing a nulling resistor can give you a larger nulling range, but makes the
trimming potentiometers less sensitive when you adjust them.
Replacing the Shunt Resistors
The shunting resistors (R
SCAL
) on the SCC-SG11 have a 301 k
Ω
±
1%
value. To replace a shunting resistor on the SCC-SG11 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.
1
R5 Nulling Resistor for ACH(
X
+8)
2
R1 Nulling Resistor for ACH(
X
)
3
R39 Offset Nulling Adjustment for ACH(
X
)
4
R40 Offset Nulling Adjustment for ACH(
X
+8)
1
2
3
4
