Shunt-Calibration
Resistors
Shunt-calibration resistors are chosen to accurately
simulate resistance change in a strain gage subjected
to specified levels of compressive strain. Strain
indicators generally produce a linear output with a
fully active half-bridge or full-bridge input
circuit, and will be slightly in error when a single
active arm is used. The same nonlinearity occurs
whether the gage is actually strained in compression
or simulated by shunting the gage with the
corresponding calibration resistor. See Vishay
Measurements Group Tech Note TN-514,
Shunt
Calibration of Strain Gage Instrumentation
.
Shunt-calibration resistors are available in
standard "S"
and
wire-wound "W"
constructions. |
|
For 120-Ohm Gage Circuit
Order Code
|
Resistance
(ohms) |
Tolerance
(%) |
Equivalent
Microstrain
* |
| W-599880-02 |
599 880 |
+
0.02 |
100 |
| W-119880-02 |
119 880 |
+
0.02 |
500 |
| S-59880-01 |
59 880 |
+
0.01 |
1000 |
| S-29880-01 |
29 880 |
+
0.01 |
2000 |
| S-19880-01 |
19 880 |
+
0.01 |
3000 |
| S-14880-01 |
14 880 |
+
0.01 |
4000 |
| S-11880-01 |
11 880 |
+
0.01 |
5000 |
| S-5880-01 |
5 880 |
+
0.01 |
10 000 |
|
|
For 350-Ohm Gage Circuit
Order Code
|
Resistance
(ohms) |
Tolerance
(%) |
Equivalent
Microstrain
* |
| W-349650-02 |
349 650 |
+
0.02 |
500 |
| W-174650-02 |
174 650 |
+
0.02 |
1000 |
| S-87150-01 |
87 150 |
+
0.01 |
2000 |
| S-57983-01 |
57 983 |
+
0.01 |
3000 |
| S-43400-01 |
43 400 |
+
0.01 |
4000 |
| S-34650-01 |
34 650 |
+
0.01 |
5000 |
| S-17150-01 |
17 150 |
+
0.01 |
10 000 |
|
|
For 1000-Ohm Gage Circuit
Order Code
|
Resistance
(ohms) |
Tolerance
(%) |
Equivalent
Microstrain
* |
| W-999000-02 |
999 000 |
+
0.02 |
500 |
| W-499000-02 |
499 000 |
+
0.02 |
1000 |
| W-249000-02 |
249 000 |
+
0.02 |
2000 |
| W-165666-02 |
165 666 |
+
0.02 |
3000 |
| W-124000-02 |
124 000 |
+
0.02 |
4000 |
| S-99000-01 |
99 000 |
+
0.01 |
5000 |
| S-49000-01 |
49 000 |
+
0.01 |
10 000 |
|
*
True compression strain simulated by
shunting each calibration resistor across an active
strain gage arm of the exact indicated resistance.
This is based on a circuit gage factor setting of
2.000.
Page 5 of 7
|
|
Vishay Measurements Group