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Note:
If no active faults or warnings are present, the 4-20 mA output signal may have latched due to an earlier alarm that has now cleared.
6. Press Back to return to the Device Setup menu.
7. Select Operations.
8. Select Clear Latch.
9. Press OK to initiate a Device Reset, which will clear any latched faults or warnings.
Note:
If any configuration changes have been made, wait 15 seconds before doing a soft reset or cycling the power.
10. The display shows a confirmation message. Press OK.
11. Return to the home screen.
10.4 Maintenance using HART Communications
Note:
The instructions that follow assume that a suitable HART host (handheld or PC) is connected to the Searchzone Sonik and that the user
is logged in 'Engineer' profile access privileges.
This section explains how to perform common maintenance operations. Please refer to IEC/EN 60079-29-2 or other local or national
regulations for guidance on establishing an appropriate maintenance routine.
Inspection
Proof Test (Gas Leak Challenge)
Investigation of Faults or Warnings
CAUTION
After changing any parameter, poll the Searchzone Sonik and verify that the received value is correct.
10.4.1 Inspection
Searchzone Sonik should be inspected periodically and cleaned if necessary. The required frequency of inspection will depend on local
site conditions and will need to be established through experience.
CAUTION
Gas leak alarms may be generated during this procedure. Follow the steps to inhibit the 4-20 mA
output.
WARNING
Ensure that the detector is not unintentionally left in an inhibit state.
1. Select Device Setup.
2. Select Operations.
3. Select Inhibit Detector.
4. Select Start Inhibit.
5. Press OK to confirm.
6. A confirmation message is shown informing that Inhibit Mode is started. Press OK. The 4-20 mA output is now inhibited. Inspect the
Searchzone Sonik unit and cabling for any signs of physical damage.
7. Clean any dust or dirt from the Searchzone Sonik unit using soapy water and a soft cloth.
8. Select Device Setup.
9. Select Operations.
10. Select Clear Latch to clear any faults or warnings that may have been generated by cleaning.
PN 2331M1220 Issue 1
How to check for damage and clean the unit
How to carry out a gas leak test using a canister of compressed air
How to view Faults and Warnings
Searchzone Sonik − Technical Manual
10 Communications
76
11/2018
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