Setting Up The Sensor Range; Adjusting Deadband; Zero Calibration; Creating A Zero Offset - Johnson Controls FMS-2000C User Manual

FMS-2000C

Setting up the sensor range

You can configure the sensor range, if the sensor type is Remote Digital. The default sensor range is +/- 0.25 in. W.C.
1. On the home screen, tap the Settings icon to enter the Settings menu.
2. To view analog input settings, tap Analog I/O.
3. To find the analog input you want to adjust, swipe left.
4. On the ANALOG screen, expand Sensor Range and choose from the following:
• +/- 0.01 in. W.C.
• +/- 0.05 in. W.C.
• +/- 0.10 in. W.C.
• +/- 0.20 in. W.C.
+/- 0.25 in. W.C.
•
5. To save the new settings, collapse Sensor Range.

Adjusting deadband

This parameter specifies the deadband applied to the pressure input signal for control purposes. When the input signal is within the
deadband, the corresponding PID control output remains constant.
1. On the home screen, tap the Settings icon to enter the Settings menu.
2. To view analog input settings, tap Analog I/O.
3. To find the analog input you want to adjust, swipe left.
4. On the ANALOG screen, tap the Deadband arrow.
5. Enter the Deadband value.
6. To confirm the new settings, tap the Checkmark icon.

Zero Calibration

The Zero Calibration and Reset Zero Offset options can be used to reset the zero pressure reading for a specific installation. Once the
FMS-2000C controller has been installed completely with any peripheral remote sensor modules, this feature can be used to recalibrate
the controller's zero reading to read accurately with the door to the monitored room left open.
With the door to the monitored room open, the differential pressure measured by the FMS-2000C controller usually approaches
zero. However, due to imperfections in the sealing of the remote sensor enclosure and pressure accumulation in the wall dividing the
monitored room and the adjacent corridor, the pressure reading does not reach zero. It is common for the differential pressure reading
to be up to 0.0010 in. W.C. with the monitored room's door left open to allow pressure to equalize.

Creating a zero offset

1. On the home screen, tap the Settings icon to enter the Settings menu.
To view analog input settings, tap Analog I/O.
2.
3. On the ANALOG screen, tap the Zero Calibration arrow.
On the ZERO CALIBRATION screen, tap the Create Zero Offset arrow.
4.
5. Follow the instructions on screen and wait for the real-time view reading on the screen to stabilize for at least 10 seconds.
To create a zero offset, tap Proceed.
6.

Resetting the zero offset

If creating a zero offset does not result in the differential pressure reading being zeroed, you can reset any existing offset using the
Reset Zero Offset option. Use this option before repeating Creating a zero offset.
1. On the home screen, tap the Settings icon to enter the Settings menu.
2. To view analog input settings, tap Analog I/O.
3. On the ANALOG screen, tap the Zero Calibration arrow.
4. On the ZERO CALIBRATION screen, tap Reset Zero Offset.
On the RESET ZERO OFFSET screen, tap Proceed.
5.
6. To confirm the new settings, tap the Checkmark icon.

Setting the alarms

By default, the FMS-2000C Critical Environment Controller comes preset in neutral isolation mode. You cannot set alarms in neutral
isolation mode. If this is the first time you are configuring AI-1 or AI-2 for pressure, change the isolation mode for the primary or
secondary space from neutral to either positive or negative before you can set the alarm. This does not apply to AI-3 or AI-4. See
Changing the alarm limits, if this is not the first time you are setting up the alarms.
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