Honeywell Searchpoint Optima Plus Operating Instructions Manual page 91

MAN0905_Issue 7_07/17
HART
4. Select the required navigation, for example Next Gas and press Enter.
5. The display will show a confirmation message, press OK.
6. The display will show the message "Checking availability of chosen gas", press OK.
7. The display will show the message "No specific error", press OK.
8. The display now shows the current gas and the new gas. Repeat steps 4 to 6 until the correct new gas
is found.
9. To confirm the change to the new gas select Accept Choose Gas.
10. Highlight Accept Selection and press Enter. (Alternatively, to keep the current gas, select
Abort Selection and press Enter).
11. The display will show a confirmation message, press OK.
12. The display will show the message "No specific error", press OK.
13. Press Back twice to return to the Device Setup menu.
The Searchpoint Optima Plus must now be calibrated using the new target gas. Use a cylinder of the target
gas, of approximately 50 %FSD, with an accuracy of at least ± 2 %.
Do not calibrate Searchpoint Optima Plus during periods of very high or low atmospheric pressure, very
strong winds or storms.
Caution: Gas readings will be generated during this procedure. The 4-20 mA output will be inhibited
automatically. If the procedure is aborted, ensure that the unit is not left in Inhibit mode.
Note: The unit should be powered up for 1 hour before a calibration is done.
Note: The calibration routine will timeout after 2 minutes of inactivity.
14. Using a ½ inch / 13 mm A/F open ended spanner, unscrew the two retaining nuts and remove the
Standard Weather Protection from the Searchpoint Optima Plus.
15. Fit a Calibration Cap to the Searchpoint Optima Plus. Ensure it is pushed on fully.
16. Select Calibrate
17. Select Gas Calibration.
18. The display shows a warning message, press OK.
19. Ensure that there is zero gas present in the vicinity of the Searchpoint Optima Plus. If necessary, apply
zero gas at a rate of 1 – 1.5 litres per minute.
20. When the gas reading on the display is stable press OK to initiate the Zero Calibration and then wait
for approximately 15 s. The 4-20 mA output will be inhibited automatically at this time.
21. The display shows a message that the Zero Calibration was successful and offers to exit without a
Span Calibration. Select No and press Enter.
22. Enter the concentration of the span calibration gas and press Enter.
23. Apply calibration gas at a rate of 1 – 1.5 litres per minute. Wait for the gas reading to stabilise
(~ 30 - 60 s), then press OK to initiate the Span Calibration and then wait for approximately 15 s.
24. The display shows a message that the Span Calibration was successful. Remove the Calibration Cap
and wait for the test gas to clear (~ 30 s).
25. Ensure that the gas reading has returned to zero. Press OK to release the 4-20 mA output.
26. The display shows a note that the Searchpoint Optima Plus will return to normal operation, press OK.
27. Return to the Welcome screen.
28. Refit the Standard Weather Protection and the two retaining nuts.
20. Appendix 2 –
Additional Functions
®
91
Searchpoint Optima Plus with optional HART output
®
Operating Instructions
2108M0550