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EM-3230 P. 3 / 3
3) Again, with 50% input angle, confirm that output is 50
±0.5%. If the output deviates from 50 ±0.5%, repeat the
steps 1) and 2).
4) Set the input angle to 0%.
If output deviates from 0%,
adjust Zero so that output
becomes 0%.
See Figure 3.
5) Set the input angle to 100%.
If output deviates from
100%, adjust Zero so as to
compensate a half of the de-
viation.
See Figure 4.
6) With 100% input angle, ad-
just Span to compensate the
other half of the deviation in
order to obtain 100% output.
See Figure 5.
7) Apply 0% and 100% input signals and confirm output
changes accordingly. If the output deviates from the in-
put, repeat the steps 4) to 6).
Note: For ease of illustration, a linearity error of the sensor
angle is expressed in an excessive manner in each graph.
MAINTENANCE
Regular calibration procedure is explained below:
■
CALIBRATION
Warm up the unit for at least 10 minutes. Apply 0%, 25%,
50%, 75% and 100% input angle. Check that the output sig-
nal for the respective input angle remains within accuracy
described in the data sheet. When the output is out of toler-
ance, recalibrate the unit according to the “ADJUSTMENT
PROCEDURE” explained earlier.
LIGHTNING SURGE PROTECTION
M-System offers a series of lightning surge protector for
protection against induced lightning surges. Please contact
M-System to choose appropriate models.
OUTPUT %
100
50
0
100
INPUT %
0
Fig. 3
OUTPUT %
100
50
0
100
INPUT %
0
Fig. 4
1/2 deviation
OUTPUT %
100
50
0
100
INPUT %
0
Fig. 5
1/2 deviation
