Detcon 10/12 Control Card Test Fixture User Manual
Page 9
Model 10/12 Control Card Test Fixture
Page 9 of 10
2mA
CAL
02.0
4mA
00
04.0
12mA
50
(±1) 12.0
Variable R4 & 24
100
20.0
Variable R4 & 24
100 flashing
20.1 or greater
Note: The Variable mA position is normally set for 20.0 mA input. These potentiometers
can be adjusted to cause the mA input to cover the full range from 0 to 21+ mA. This is
useful for checking alarm set points and over-range conditions. The potentiometers are
turn. Center the fine potentiometer and adjust the coarse potentiometer to where you want
the mA input signal to be. Use the fine potentiometer for fine adjustments. To test
flashing over-range, adjust the fine potentiometer to achieve an output greater than 20.0
mA.
5 - Check alarm relay outputs.
Turn SW1 clockwise until ALM1, ALM2, and ALM3 LEDs on the Model 12C
illuminate. Verify that the corresponding alarm LEDs on the test fixture (D6, D7, and
D8) also illuminate. Return SW1 to the “4mA” position.
If alarms on the control card are programmed for latching, push the RESET button to
deactivate. Test the Remote Reset button on the test fixture by reactivating the (latched)
alarms and then use SW2 to reset. The control card display will indicate “EXT ALM
RST”.
Turn SW1 to the 0 mA position and verify fault LEDs illuminate on the control card as
well as the test fixture (D5).
6 - Open Collector LEDs. The open collector LEDs (D9, D10, D11, and D12) should
illuminate with the corresponding alarm LED located under them.
4.5 Other Features
1 - mA Meter Shunt IN (JP2). Removing the jumper tab on JP2 will cause the mA input
signal to the control card to become open. A current meter can be used to measure the
input current with the jumper tab removed. Be sure the jumper tab is installed for normal
operation.
2 - mA Meter Shunt OUT (JP3). Removing the jumper tab on JP2 will cause the mA
output signal to the mA OUTPUT meter on the test fixture to become open. A current
meter can be used to measure the output current with the jumper tab removed. Be sure the
jumper tab is installed for normal operation.
3 - Facilities Module (FM) The Facilities Module (FM) is a product variation of the