Dry-well Calibrator
Operation
19
Calibration Parameters
The operator of the Product controller has access to a number of the calibration constants: R0, ALPHA,
and DELTA. These values are set at the factory and must not be altered. The correct values are
important to the accuracy and proper and safe operation of the Product. Access to these parameters is
available to the user so that in the event that the controller memory fails the user may restore these
values to the factory settings. The user should have a list of these constants and their settings with the
Product manual.
W
Caution
DO NOT change the values of the Product calibration constants from the factory set
values. The correct setting of these parameters is important to the safety, proper
operation, and performance of the Product.
The calibration parameters menu is indicated by:
CAL
Calibration parameters menu
Press
SET
five times to enter the menu. The calibration parameters menu contains the parameters,
Hard Cutout, R0, ALPHA, and DELTA, which characterize the resistance-temperature relationship of
the platinum control sensor. These parameters may be adjusted to improve the accuracy of the
Product.
The calibration parameters are accessed by pressing
SET
after the name of the parameter displays.
The value of the parameter may be changed using
u
or
d
. After the desired value is reached, press
SET
to set the parameter to the new value. Press
EXIT
to skip a parameter and ignore any changes
that may have been made.
R0
This probe parameter refers to the resistance of the control probe at 0 °C. The value of this parameter
is set at the factory for best Product accuracy. The value ranges from 95 to 105. For values greater
than 100.000, the display does not show the hundreds placement. For values less than 100.000, the
display shows the entire value. The R0 parameter is indicated by:
r0
Flashes for one second and then the R0 setting displays
00.014
Current R0 setting (100.014)
To change the R0 setting, press
u
or
d
.
99.999
New R0 setting
To accept the new setting, press
SET
. Press
EXIT
to continue without storing the new value.
S
Accept the new R0 setting
