Calibration Pressure - Johnson Controls FRICK QUANTUM HD Operation

ACCESSING:
DESCRIPTION: This screen is used to view and set the
pressure calibration values.
This screen should be used anytime a pressure sensor is
found to be out of calibration. The recommended practice
for adjusting the calibration reading is to fi rst determine
which sensor(s) need to be calibrated. Once this is de-
termined, you must know the actual reading that should
be showing. This can be accomplished by comparing the
Current Value shown, with the actual value using a sepa-
rate measurement device, such as a Digital Volt Meter,
or temperature probe, etc. Determine the difference be-
tween what the Current Value for the sensor is, and what
the reading of the separate device shows. As an example,
assume that the Suction Pressure on this screen reads 135
PSIG, but a separate device shows a reading of 142 PSIG.
Select either the Current Value box and enter 142 there,
or enter the difference between the Current Value and the
actual reading (7) into the Offset box. The new reading
will now be 142, and should match your separate reading.
PRESSURE
Sensors - The following sensor values are dis-
played along with the unit of measure at the left
side of the screen:
Suction
Discharge
Oil
Filter
Economizer
QUANTUM™ HD COMPRESSOR CONTROL PANEL
OPERATION
CALIBRATION
Pressure
Pressure
Balance Piston
System Discharge
Main Oil Injection
Manifold
[Current Value] - This box will initially show the
actual value being read by a sensor. It is also a
setpoint box that allows the user to set the cur-
rent value that is being read by the sensor to a
different value, in the case that the calibration is
inaccurate, this new value will be added to the
actual value to update the offset (see below).
[Offset] - A value entered here will allow the
user to compensate for calibration issues with
a sensor. This value is then added to the Cur-
rent Value, to create a new Current Value (see
above).
Low - This will show the low end range that the
sensor is capable of reading.
High - This will show the high end range that the
sensor is capable of reading.
Sensor Output - This will show the current type
of sensor that is being used.
I/O Board - This will show the current I/O board
that the sensor is assigned to.
I/O Channel - This will show the current I/O
channel that the sensor is assigned to.
090.040-O (MAR 12)
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