Specifications

Selecting Automatic Calibration Option
8
Siemens Industry, Inc.
140-0893 Start-up
Draft
1/12/2010
Selecting Automatic Calibration Option
Using Table CAL SETUP Options set CAL SETUP to the value that best meets your
job requirements.
If appropriate, change CAL TIMER from the default of 12 hours. This setting applies
only if your choice for CAL SETUP includes Option 4.
NOTE:
The air velocity sensor should be calibrated at least once every 24 hours. Make
sure that the sensor has been calibrated before balancing takes place, as this will
affect the balancer’s results.
CAL SETUP Options
CAL SETUP
Description
0 Calibration occurs ONLY when the point CAL AIR is set to YES.
1 Calibration occurs when the field panel commands a day/night mode
changeover. Actual calibration is subject to a time delay of 0, 1, 2, or 3
minutes. This delay is determined by the point CTLR ADDRESS divided
by 4. The remainder is the time delay in minutes.
For example, If CTLR ADDRESS = 11, then the controller will wait 3
minutes (11 ÷ 4 = 2 R3) after it receives the day/night mode changeover
command before beginning the calibration routine.
2 Calibration occurs immediately after the override switch is depressed.
4 (factory default
value)
Calibration occurs on the time interval set in the point CAL TIMER.
For example, if CAL TIMER = 12, then the calibration period is 12 hours.
Actual calibration is subject to a time delay based on the value of CTLR
ADDRESS. See the example in Option 1.
NOTE:
Options can be combined by summing their numbers. For example, to calibrate
as in Options 1 and 2, set CAL SETUP to 3.