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10 Communications
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10.3.4 Test 4-20 mA Loop Integrity
It is recommended that the 4-20 mA loop integrity is tested by setting the Searchzone Sonik to output an over-range current. This will
confirm that there are no faults in the system that would cause a current limit.
Note:
By default, this function will timeout after 10 minutes of inactivity.
Note:
When connecting or disconnecting a multimeter, power off the Searchzone Sonik, otherwise the detector will indicate a fault warning
that the 4-20 mA loop was broken.
1. Select Device Setup.
2. Select Operations.
3. Select Output Test.
4. Select Force Loop.
5. Select Apply Force Loop.
6. Select between 4 mA, 20 mA or Custom.
7. The display shows a warning message, press OK. Searchzone Sonik will now output the chosen value in mA.
8. Select End.
9. The display shows a note that the Searchzone Sonik will return to normal operation, press OK.
Note:
If the current at the controller is not correct, check the 4-20 mA loop connections and cabling, and check that the loop resistance is less
than 600 Ω. In current source mode, for supply voltages of 18 to 20 Vdc the maximum loop resistance is 500 Ω.
Note:
If the product cannot generate the required output current it will move to a fault condition after a very short period of time.
10.3.5 Configure Internal Alarm Threshold
The internal alarm setpoint is used to log events when the gas leak reading exceeded the threshold. It is also used as the value to
simulate Alarm. The default value is 60 dB.
1. Select Device Setup.
2. Select Settings.
3. Select Alarms.
4. Select Configure Alarms.
5. Select Change Alarm Set Point.
6. Enter new value in dB. Press Enter, then press Save to send the information to Searchzone Sonik.
7. Return to the home screen.
10.3.6 Clear Alarm Latch
During commissioning alarm or fault latches may be generated. This will be indicated by the 4-20 mA output signal. Use the procedure
below to clear them.
1. Select Device Setup.
2. Select Diagnostics.
3. Select Active Faults or Active Warnings to check for any faults or warnings.
4. Select First or Next to display the fault or warning.
Note:
"First" displays the active fault or warning that occurred earliest in time. "End of list" means that the last fault or warning has been
reached.
5. Press OK and use the back button to return to Diagnostics menu.
Searchzone Sonik − Technical Manual
PN 2331M1220 Issue 1
11/2018
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