68 C4 Manual Rev 7.5.2
7.6 Setup Parameter Commands
The commands in this section allow a user to change the value of some of the
setup parameters that are stored in SRAM and used by Remote mode. The SRAM
copy of the setup parameters is created upon entry to Remote mode from the non-
volatile copy that is kept in EEPROM for use by Local and Program modes.
The commands listed in this section change only the SRAM working copy of the
setup parameters. To save these values in the non-volatile EEPROM setup
parameter tables, use the UP command (See Section 7.6.6).
If any of the setup parameter values in SRAM have been modified by Remote
mode commands, they will not be the same as the non volatile EEPROM copies
unless an UP command was subsequently used to copy the SRAM values to the
setup parameter tables in EEPROM. Upon exiting Remote mode, including by
system reset or by power loss, the SRAM values are discarded. Each time Remote
mode is entered a new copy of the EEPROM setup parameter values is read into
SRAM as a working copy.
7.6.1 SC Set Probe Correction
A complete discussion of the probe correction entries is in Section 8.7. Read that
section carefully before using this command.
WARNING: Incorrect usage of this command may cause temperature
control to be effected with invalid data and may result in unexpected
temperature excursions that can cause harm to personnel and damage to
equipment.
The SC command writes the data for either probe 1, or probe 2, to setup
parameter fields F17-F20 or F21-F24 respectively. The data for all 4 parameters
used to correct one probe must be sent with the command.
Software probe correction is achieved by entering four temperatures, U1, C1, U2,
& C2, for each probe into the setup parameter table. U1 & U2 are the
uncorrected, or displayed, temperatures at two points. C1 & C2 are the corrected,
or actual, temperatures at those same two points.
Values for probe correction should be entered in the current scale, /C or /F, as set
in setup parameter F16. There is no difference in the command syntax for
Fahrenheit operation, so it is incumbent upon the user to use the correct values.