Calibration
4-3
September 2004
Testing Linearity (cont.)
6.
Under
% Full Scale
use the arrow keys to enter
50.00
. Press [
W
]
and [
X
] to move the cursor to desired character position and press
[
S
]
and
[
T
]
to increase or decrease the number to the desired
value. Then, press
[ENTER]
.
7.
Check the ammeter reading.
Table 4-1
below lists the expected
ammeter readings at various % Full Scale settings for both
4-20 mA and 0-20 mA scales. Use this table to verify the accuracy
of your ammeter reading.
Note:
If the linearity test readings are not with ±5
μ
A of the values
listed in
Table 4-1
, check the accuracy and wiring of the
ammeter. Then, repeat the low and high end calibrations. If
the analog output still does not pass the linearity test, contact
GE for assistance.
8.
Repeat Step 2 for a different output percentage (0-100%). Check
the ammeter reading at this setting and press
[ENTER]
when done.
Table 4-1: Expected Ammeter Readings
% Full Scale
4-20 mA Scale*
0-20 mA Scale*
0
4.000
0.000
10
5.600
2.000
20
7.200
4.000
30
8.800
6.000
40
10.400
8.000
50
12.000
10.000
60
13.600
12.000
70
15.200
14.000
80
16.800
16.000
90
18.400
18.000
100
20.000
20.000
* all ammeter readings should be ±0.005 mA
Summary of Contents for AquaTrans AT868
Page 7: ...Chapter 1...
Page 25: ...Chapter 2...
Page 45: ...Chapter 3...
Page 50: ...Chapter 4...
Page 56: ...Appendix A...
Page 62: ...Appendix B...
Page 63: ...Measuring P and L Dimensions Measuring P and L B 1...
