Table of Contents
Advertisement
Testing Linearity (cont.)
Calibration
6. Under % Full Scale use the arrow keys to enter 50.00 . Press [
and [ ] to move the cursor to desired character position and press
[ ] and [ ]
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
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
0
10
20
30
40
50
60
70
80
90
100
* all ammeter readings should be ±0.005 mA
4-20 mA Scale*
0-20 mA Scale*
4.000
5.600
7.200
8.800
10.400
12.000
13.600
15.200
16.800
18.400
20.000
September 2004
]
μ
A of the values
0.000
2.000
4.000
6.000
8.000
10.000
12.000
14.000
16.000
18.000
20.000
4-3
Advertisement
Table of Contents
