02/25/00
40 - Microsense II Model 5300 Gaging System
Scale-Factor Adjustment
The Model 5130 gaging system’s calibration may be adjusted via a front panel potentiometer, labeled "SF".
The following procedure should be followed to calibrate the unit.
EQUIPMENT NEEDED:
1. Digital Volt Meter (DVM) with +10 Volt range
2. Fixturing equipment capable of moving the target precisely throughout the measurement range
3. Small screwdriver to access the front panel scale factor potentiometer
NOTE:
Calibration is very dependent on fixturing. It is important that the probe
sensing surface and target be parallel or calibration errors will occur.
PROCEDURE
1. Set the probe at near standoff so that the DVM reads -10.000 volts on +ANALOG OUT output.
2. Move the probe or target so that the gap between them increases by the total measurement
range (i.e., for a +100
µ
m range, increase by 200
µ
m). Measure according to the fixturing
equipment.
3. Note this voltage.
4. Adjust the potentiometer so that the reading on the DVM (+ANALOG OUT) is:
10 + [ (10 - [reading in step 3]) / 2 ]
Example:
If step 3 reading = 9.900 V, adjust pot so that DVM reads 10.050 V.
If step 3 reading = 10.150 V, adjust pot so that DVM reads 9.925 V.
5. Repeat steps 1-4 to check the calibration. Calibration is complete when the reading is within
a desired tolerance. Iteration may be necessary to precisely adjust the scale factor.
The scale factor may be
adjusted to better than 10 mV
.
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