MAN0921_Issue 1_05/12 Searchpoint Optima Plus
Safety Manual
11
6. When the gas reading on the display is stable press OK to initiate the Zero Calibration and then wait for
approximately 15s. The 4-20 mA output will be inhibited automatically at this time.
7. The display shows a message that the Zero Calibration was successful and offers to exit without a Span
Calibration. Select Yes and press Enter.
8. The display shows a note that the Searchpoint Optima Plus will return to normal operation,
press OK.
9. Return to the Welcome screen.
3.3 Bump Test (Gas Challenge)
3.3.1 Bump Test (Gas Challenge) for a unit tted with a Standard
Weather Protection
Searchpoint Optima Plus should be functionally checked using an appropriate test gas.
Caution: Gas readings will be generated during this procedure.
Note: Do not use the HART
®
Communications Bump Test routine as this will automatically inhibit the
4-20 mA signal.
Note: The unit should be powered up for 1 hour before a gas test is done.
1. Fit a Gassing Cover to the Searchpoint Optima Plus.
2. Apply an appropriate test gas at a rate of 1 – 1.5 litres per minute for ~ 30 - 60 s.
3. Check that the Searchpoint Optima Plus responds to the test gas. The live gas concentration is shown
on the screen.
4. Remove the Gassing Cover and wait for the test gas to clear (~ 30 s). Ensure that the gas reading has
returned to zero.
3.3.2 Bump Test (Gas Challenge) for a unit tted with a Flow Housing
Searchpoint Optima Plus should be functionally checked using an appropriate test gas.
Caution: Gas readings will be generated during this procedure.
Note: Do not use the HART
®
Communications Bump Test routine as this will automatically inhibit the
4-20 mA signal.
Note: The unit should be powered up for 1 hour before a gas test is done.
1. Apply an appropriate test gas, using the same ow rate as the sampling system in which the
Searchpoint Optima Plus is installed.
2. Check that the Searchpoint Optima Plus responds to the test gas.
3. Apply zero gas and wait for the gas reading to return to zero.
3. Proof test using HART
®
Communications
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