91
Set-up Menu
The
S
ET
-
UP
menu allows the user to perform miscellaneous set-up changes, which are
used to configure the system.
Set Clock
The
S
ET
C
LOCK
screen allows the user to enter the current day and date. The system clock may be set
to a 12 or 24 hour mode.
The correct hour, minute and second for the current time must be entered as 24 hour time.
Calibrate Sensors
Two types of calibration can be accomplished using the Dynamic or Static Sensor Calibration options.
Dynamic Sensor Calibration is selected when the user wishes to change current sensor range values.
Static Sensor Calibration is selected to recall sensor calibration values after a return to factory
configuration or after a system software or hardware change, which would effect sensor calibration.
Dynamic Sensor Calibration
D
YNAMIC
S
ENSOR
C
ALIBRATION
is the process of adjusting the readings of the Viltech analog
sensors to remove small inaccuracies. The calibration process is performed from the Dynamic Sensor
Calibration screen. The approach used for dynamic calibration divides the sensor range into three
zones. When the value being calibrated is in the upper zone (above 66%) the upper range limit is
allowed to change by a maximum of 5% and the lower range limit remains constant. This is referred to
as a span change. When the value being calibrated is in the lower zone (below 33%) the lower range
is allowed to change by a maximum of 5% and the upper range remains constant. This is referred to
as an offset change. When the value being calibrated is in the middle zone (33% to 66%) both end
points are allowed to move a maximum of 5% (typical) resulting in both a span and offset change.
For best results calibration should be performed both at the operating value and at or near the lower
limit. Several calibration attempts may be required to zero-in on the correct values over the full
operating range.
Static Sensor Calibration
STATIC CALIBRATION
is performed to reset or restore sensor calibration values after a hardware,
software or factory configuration change. The previous dynamic calibration results are shown on the
Static Sensor Calibration screen to allow the user to re-enter the values manually or perform a Restore
operation to reset the minimum and maximum range values for the previous calibration results.
Sensors should only be calibrated by qualified personnel and always against devices known to be
accurate. Refer to the information for the Calibrate Sensors screen in the Additional Menus Operating
Procedures section of this manual.
Summary of Contents for Vilter VilTech
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Page 158: ...158 Compressor State Table ...
Page 159: ...159 Last RECIPStart Status Table ...
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