Revision 5
151
August 2021
2. The value in the
Zero
field must be set to 4, and the value in the
Span
field must be
set to 20.
3. Connect a multimeter set to milliamp measurement to the analog output to be
calibrated. The analog outputs are all on terminal block P3 of the IO board. The
terminals for each analog output are clearly marked on the board. Refer to Figure 95.
Figure 95: Analog Output Terminal Block P3
The analog outputs on the IO board are loop powered, so an external power
supply must be provided. The multimeter must be placed in SERIES with the
current loop. When the multimeter is connected correctly, a green LED
above the analog output wiring connection on the IO board will illuminate
to show that the current loop is closed and loop power is being provided,
as indicated in Figure 95.
4. Press the
Output Zero
button. The output current from the analog output will change
to approximately 4 mA.
5. Enter the reading from the meter in the
Meter Reading
field under the
Zero
heading
and press the
Auto Cal
button. This will adjust the Zero output to exactly 4 mA. If the
meter reading is still not exactly 4 mA, repeat the process.
6. Press the
Output Span
button. The output current from the analog output will change
to approximately 20 mA.
7. Enter the reading from the meter in the
Meter Reading
field under the
Span
heading
and press the
Auto Cal
button. This will adjust the Span output to exactly 20 mA. If
the meter reading is still not exactly 20 mA, repeat the process.
8. The analog output is now calibrated. Press
Capture
to save the calibration to the
board.
9. Test the output by entering the desired mA output in the
Test(mA)
field and then
pressing the
Output Test
button. This will force the analog output to generate
the
entered value. In this way the analog output loop can be tested at several readings
such as 0, 25, 50, 75 and 100 % of scale (4, 8, 12, 16 and 20 mA). It is advisable that
this test be done in conjunction with control room staff to ensure the correct readings
are being received not only at a multimeter connected to the analyzer but also at the
DCS.
Loop power available, current
loop complete indicator
LEDs, one per analog output.
Summary of Contents for 943-TGS-CE
Page 137: ...Revision 5 137 August 2021 Figure 84 Oven Cabinet Details...
Page 138: ...Revision 5 138 August 2021 Figure 85 Control Cabinet Door Closed...
Page 139: ...Revision 5 139 August 2021 Figure 86 Control Cabinet Door Removed...
Page 140: ...Revision 5 140 August 2021 Figure 87 Power Steam Air Signals Connection Details...
Page 141: ...Revision 5 141 August 2021 Figure 88 AC Wiring Schematic...
Page 142: ...Revision 5 142 August 2021 Figure 89 DC Signals and Wiring Diagram...
Page 143: ...Revision 5 143 August 2021 Figure 90 Flow Diagram...
Page 144: ...Revision 5 144 August 2021 Figure 91 Control and Oven Cabinets Interconnect Wiring...
