Scott QuadScan II 7400, Руководство по эксплуатации и техническому обслуживанию, Страница: 69 / 121

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corresponding to the mA input. The internal horn will not activate unless programmed by the
user to do so. Pressing the silence/reset button will cause the LED to stop flashing and remain
steady.
8. Reset the current generator to 4mA and input. The LCD display will return to 0.0. If the LEDs
and relays are still activated press the reset button the LEDs and relays will now deactivate.
Note: The following test assumes an oxygen range of 0% to 25%.
9. Set the current generator for 17.4 mA and input to the system. The LCD will indicate
approximately 20.9 %, which is a normal oxygen atmosphere and the QuadScan II will indicate
normal operation. Alarm LEDs or alarm relays will not be activated.
10. Reset the current generator to 12.0 mA and input. The LCD will indicate 12.5%. The warn
and alarm LEDs will be illuminated and flashing, the warn and alarm common relays will
activate (change state). The internal horn will be activated and the common horn relay will also
be activated. The fail LED and fail relay will not be activated.
11. Set the current generator to the programmed current of 18.7 mA to simulate an inhibit
condition. The LCD will display approximately 23 %. The Channel Status LED will illuminate
and flash yellow. The internal horn will not activate. Reset the current generator to 17.4 mA
and input. The LCD will indicate 20.9 % if the LEDs and relays are still activated. Press the
reset button and the LEDs and relays will now deactivate.
12. Disconnect the current generator. Reconnect the loop wires and move to channel 2 through 4.
Note: If any of the conditions described do not function, refer to the Troubleshooting
Section.