Its-90 Conversion; Table 2 Conversion Types - Fluke 1529 User Manual

1529 Chub-E4 Thermometer Readout
User's Guide
7.2.1.1
36
the next parameter. On the last parameter, press the Exit button to exit to the
menu.

Table 2 Conversion Types

Probe Type
SPRT, PRT, RTD
Thermistor
Thermocouple

ITS-90 Conversion

The ITS-90 conversion is for PRTs calibrated and characterized using the Inter-
national Temperature Scale of 1990 equations. The parameters that appear
when ITS-90 is selected are RTPW, A4, B4, A, B, C, and D. These should be
set with the corresponding values that appear on the calibration certificate for
the PRT. The parameter RTPW takes the triple point of water resistance from
the certificate. The parameters A, B, C, and D take the an, bn, cn, and d coeffi-
cients from the certificate, where n is a number from 6 to 11. Parameters A4
and B4 take the a4 and b4 coefficients on the certificate. Any ITS-90 parameter
of the 1529 that does not have a corresponding coefficient on the PRT certifi-
cate must be set to 0.
When the ITS-90 conversion type is selected, the RANGE, WIRES, and coeffi-
cients are displayed on the right portion of the bottom of the display. The UD
buttons are used to scroll through the coefficients. Use the Enter button to edit
and to save the new settings. Use the LR buttons to change each digit of the
settings. Press and hold the Exit button to cancel to the main display or press
the EXIT button to cancel and to move to the next parameter. On the last pa-
rameter, press the Exit button to exit the menu.
Conversion Type
ITS-90 (default)
ITS-SR5
PT-100
CVD
RES ( )
THRM R(T)
THRM T(R)
YSI-400
RES (K )
TC-K (default)
VIN [mV]
TC-B
TC-E
TC-J
TC-N
TC-R
TC-S
TC-T
TC-AU/PT
Polynomial