Analog Outputs - Johnson Controls FRICK QUANTUM LX Operation

ACCESSING:
DESCRIPTION: This screen is used to calibrate individual analog outputs.
Use this screen if an analog output signal (channel) re-
quires calibration.
The Quantum's analog outputs have a range of approxi-
mately 0 to 25mA, but most devices that are controlled
by the Quantum™ LX require a signal that varies between
4 and 20mA. To restrict the analog outputs to the proper
values, each of the outputs must be calibrated before they
can be used. Every output channel has a Low End and
a High End value that are used for calibration. Both val-
ues can be set from 0% to 100%. The output channel's
maximum value is represented by 100% and its minimum
value is represented by 0%. To calibrate the channel, the
High End percentage is decreased until the maximum out-
put for the channel is limited to 20mA. Also, the Low End
percentage is increased until the minimum output for the
channel is 4mA.
Below is a step by step procedure for calibrating one ana-
log output.
1. Confi gure the analog output channel for its in-
tended use, i.e., if the channel is to be used for
PID control, enter the Device Source and Device
Channel of the selected analog output channel
under one of the PID columns on the PID Setup
page.
2. Set up a meter to read the channel's output val-
ue in milliamps.
3. Go to the Analog Output Calibration page.
4. Select the Analog Board and the Channel Num-
ber for the output that is being calibrated.
QUANTUM™ LX COMPRESSOR CONTROL PANEL
OPERATION
CALIBRATION - Analog Outputs

Analog Outputs...

Calibration...
Output Calibration
5. After the Analog Board and Channel Number
have been selected, the channel's function will
be displayed below the Channel Number. If "Not
Confi gured" is shown here instead, the channel
has not yet been assigned a control function.
Return to step 1 and setup the channel for the
control task it is to perform.
6. Press the [#1] key (Set Low End) and the value
shown on the meter should go to the channel's
low end value.
7. Check that the "Delta For Changing Output Per-
centage" value is 10.00. If not, press the [#0] key
(Change Delta) until it is displayed as 10.00.
8. If the channel's output is greater than 4mA press
the [#4] key (Decrement Output by Delta). If the
channel's output is less than 4mA, press the [#7]
key (Increment Output by Delta). Use these keys
to fi nd the output value closest to 4mA.
9. Press the [#0] key (Change Delta) once to de-
crease the "Delta For Changing Output Percent-
age" value to 1.00.
10. Use the [#7] and [#4] keys to again fi nd the val-
ue closest to 4mA.
11. Repeat steps 9 and 10 for Delta values of 0.1 and
0.01 to bring the output value as close as pos-
sible to 4mA.
12. Press the [#3] key (Set High End) and the value
shown on the meter should go to the channel's
high end value.
090.022-O (MAY 12)
Page 73