Calibration; Prt And Thermistor Calibration; Prt Calibration Parameters; Table 13 Prt And Thermistor Calibration Parameter Description - Fluke 1529 Chub-E4 User Manual

9

Calibration

Each channel of the 1529 is calibrated independently of the other channels and
has its own set of calibration parameters. The 1529 should be calibrated at reg-
ular intervals to ensure that it continues to measure with proper accuracy. Cali-
bration should only be done by qualified, authorized personnel. When the 1529
is recalibrated, all four channels are calibrated each calibration cycle. The cali-
bration label indicates the calibration date and recalibration due date for the en-
tire instrument.
9.1

PRT and Thermistor Calibration

The following information is for PRT and thermistor channel calibrations. The
adjustable parameters are listed in the following table.

Table 13 PRT and Thermistor Calibration Parameter Description

Parameter
C0
C100
C400
C0K
C10K
C100K
DATE
DUE
9.1.1

PRT Calibration Parameters

Three adjustable parameters are used for calibration: C0, C100, and C400. The
C0 parameter directly affects the measurement at 0 . It has negligible effect at
100 but significant affect at higher resistances. The C100 parameter directly
affects the measurement at 100 . It has negligible effect at 0 and proportion-
ately greater effect the higher the resistance. The C400 parameter directly af-
fects the measurement at 400. It has negligible effect at 0 and 100 with
greater effect as the resistance increases. Each of the parameters has positive ef-
fect at their primary resistances: increasing the value of the parameter increases
the measured resistance. The theoretically normal value for each is 0.
Description
PRT offset parameter
PRT scale parameter
PRT linearity parameter
Thermistor offset parameter
Thermistor scale parameter
Thermistor linearity parameter
Records the date the PRT or Thermistor channel
was calibrated
Record the date the PRT or Thermistor channel cali-
bration expires
9 Calibration
PRT and Thermistor Calibration
131