ABB 9438 User Manual page 24

...7 PROGRAMMING AND ELECTRICAL CALIBRATION
...7.5 Set Up Retransmission Page
Yes
No
3 0
Cal. Time s
3 0
Fail M.time s
3 0
Fail S.time s
– – – – –
SET UP RETRANS 2
– – – – –
RTX Type 4-20
0-20
0-10
– – – – –
RTX O/P Temp
D.O.
Temp D.O.
– – – – –
RTX. Log
Bi-Linear
Linear
2 0 0 .
RTX Span mg/kg
o
C
Log
2 0 .
RTX Zero mg/kg
o
C
22
Calibration Pulse time
Set the frequency of the calibration pulse signal. Programmable frequency of 15, 30, 45
seconds, 1, 2, 3, 4, 5 minutes.
See Appendix B.
Calibration Fail Mark Time
Set the mark time period for the current output to be driven hard upscale. Programmable
period of 30 seconds, 1, 2, 3, 4, 5,...,10 minutes.
See Appendix B.
Calibration Fail Space Time
Set the space time period for the current output to be driven to 0%. Programmable
period of 30 seconds, 1, 2, 3, 4, 5, ...,10 minutes.
See Appendix B.
Set Up Retransmission 2 – see also Table 7.1.
Note. Available only on 9438 800 series instruments.
Retransmission 2 Output Range
The retransmission 2 output can be selected from three mA current ranges to ensure
compatibility with the peripheral device connected.
Select the current range required for retransmission 2 output.
Retransmission 2 Output Assignment
Select the Retransmission output required:
Temp – Temperature
D.O. – Dissolved Oxygen
Retransmission 2 Output Scale
Select the retransmission output scale required. Only available if D.O. selected.
Log (Logarithmic) – see Fig. 7.2.
Bi-Linear – see Fig. 7.1.
Linear
Note for Bi-linear and log scales. The accuracy specification of the instrument should
always be given consideration when setting the scale limits to avoid impractical
discrimination on the retransmission output.
Retransmission 2 Span
Set the span to the required value. See Table 7.1 for details.
Retransmission 2 Zero
Set the zero to the required value. See Table 7.1 for details.
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