7.8 CAL MODE
The calibration menu contains functions for setting probe and instrument cali
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bration parameters. If a probe parameter is changed, the probe parameter is up
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loaded into the INFO-CON probe connector when the CAL MODE is exited or
after scrolling through the entire menu. Always check to insure that the param
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eters have been written to the INFO-CON connector by disconnecting the
probe or by turning the 1521 off and on.
The calibration menu is entered by pressing and holding the MODE button for
three seconds. “CAL MODE” appears on the display. Press the ENT button to
advance. Press the MODE button while in the calibration menu to exit and to
advance to the display mode that follows the display mode that was active be
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fore the CAL Mode was entered.
The functions contained in the CAL Mode are listed below in the order they ap
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pear. In any of the functions the ENT button stores the displayed value or se
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lection and advances to the next function. The CLR button can be used to
cancel changes to a value or selection and skip to the next function. Use the
ENT button to move from Mtr Due to Prb Due and then to Time. Use the CLR
button to quickly advance through the remaining functions. Many of the func-
tions are in the passcode protected part of the CAL Mode. You must enter the
correct passcode to reach them.
Mtr Due - View the date the instrument is due for calibration
Prb Due - View the date the probe is due for calibration
Time - View and set the real-time clock time-of-day
Passcode - Enter the passcode to advance to the protected functions
Date - View and set the real-time clock date
Probe Lock - Lock or unlock operation of the unit with the current probe
only
Prb # - Set the probe serial number
Prb Type - Select the probe type and temperature calculation
R(.01) [ITS-90 only] - Sets the R(273.16K) probe coefficient
a [ITS-90 only] - Set the a5, a6, a7, a8, a9, a10, or a11 probe coefficient
b [ITS-90 only] - Set the b5, b6, b7, b8, or b9 probe coefficient
c [ITS-90 only] - Set the c6, or c7 probe coefficient
d [ITS-90 only] - Set the d probe coefficient
a4 [ITS-90 only] - Set the a4 or a5 probe coefficient
b4 [ITS-90 only] - Set the b4 or b5 probe coefficient
R(0) [CVD only] - Set the R0 probe coefficient
Alpha [CVD only] - Set the alpha probe coefficient
Delta [CVD only] - Set the delta probe coefficient
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7 Display Functions
CAL MODE
