the nextparameter. On the last parameter, press the Exit buttontoexittothe
menu.
7.2.1.1 ITS-90 Conversion
The ITS-90 conversionis for PRTs calibrated and characterized using the Inter-
nationalTemperature Scale of 1990 equations. The parameters that appear
when ITS-90 is selectedare RTPW, A4, B4, A, B, C, and D. These should be
set withthe corresponding values that appear on the calibration certificate for
the PRT.The parameter RTPW takes the triple point of water resistancefrom
the certificate.The parameters A, B, C, and D take thean,bn,cn,anddcoeffi
-
cients from the certificate,where nis a number from 6 to 11. Parameters A4
and B4 takethe a4 and b4 coefficients on the certificate. Any ITS-90 parameter
of the 1529 that does not have a correspondingcoefficient on the PRT certifi-
cate must be set to 0.
When the ITS-90 conversiontype is selected, the RANGE, WIRES, and coeffi-
cientsare displayed on the right portion of the bottom of the display. The UD
buttonsare used to scroll through the coefficients. Use the Enter buttontoedit
and to savethe 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 canceland to move to the next parameter. On the last pa-
rameter,press the Exit button to exit the menu.
1529 Chub-E4 Thermometer Readout
User’s Guide
36
ProbeType ConversionType
SPRT,PRT,RTD ITS-90(default)
ITS-SR5
PT-100
CVD
RES(
Ω
)
Thermistor THRMR(T)
THRMT(R)
YSI-400
RES(K
Ω
)
Thermocouple TC-K(default)
VIN[mV]
TC-B
TC-E
TC-J
TC-N
TC-R
TC-S
TC-T
TC-AU/PT
Polynomial
Table 2 Conversion Types