ThermoWorks 9141 HART SCIENTIFIC FIELD DRY-WELL TEMPERATURE CALIBRATORS - Manual (Page 31)

Press “SET” and “EXIT” to enter the secondary menu and show the heater
power. Then press “SET” to access the proportional band.
S
+
E
Access heater power in secondary menu
SEC Flashes for secondary menu and then displays the
heater power
12.0 P
Heater power in percent
S
Access proportional band
4.1
Proportional band setting
ProP Flashes and then displays the value
To change the proportional band press “UP” or “DOWN”.
10.0
New proportional band setting
To accept the new setting press “SET”. Press “EXIT” to continue without stor-
ing the new value.
S
Accept the new proportional band setting
7.8 Controller Configuration
The controller has a number of configuration and operating options and calibra-
tion parameters which are programmable via the front panel. These are ac-
cessed from the secondary menu after the proportional band function by
pressing “SET”. Pressing “SET” again enters the first of three sets of configu-
ration parameters — calibration parameters, operating parameters and serial in-
terface parameters. The sets are selected using the “UP” and “DOWN” keys
and then pressing “SET”. (See
Figure 5 on page 22.)
7.9 Calibration Parameters
The operator of the instrument controller has access to a number of the calibra-
tion constants namely R0, ALPHA, and DELTA. These values are set at the
factory and must not be altered. The correct values are important to the accu-
racy and proper and safe operation of the instrument. Access to these parame-
ters is available to the user so that in the event that the controller memory fails
9141 Dry-well Calibrator
User’s Guide
28