Table 4 Setting Coefficients Rtpw, A8, B8, A4, And B4 - Fluke 1529 Technical Manual

Table 4 Setting Coefficients Rtpw, a8, b8, a4, and b4

Setting Coefficients Rtpw, a8, b8, a4, and b4
1529 ITS-90 Coefficients
RTPW
A
B
C
D
A4
B4
6.2.1.2 ITS-SR5
The ITS-SR5 conversion is a special case of the ITS-90 conversion type. This conver-
sion is for the ITS-90 sub-range 5 only.
When the ITS-SR5 conversion type is selected, the RTPW, A5, and B5 coefficients 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 parameter, press the Exit button to exit the
menu.
6.2.1.3 PT-100 Conversion
The parameters for the PT-100 conversion are R0 (R0), ALPHA (α), DELTA (δ), and
BETA (β). These parameters cannot be changed by the user and are set to; R0: 100.0,
ALPHA: 0.00385055, DELTA: 1.4998, and BETA: 0.109, which are applicable to the
ASTM E1137 type PRTs, also known as DIN-43760 or IEC-751.
When the PT-100 conversion type is selected, the RANGE and WIRES parameters are
displayed on the right portion of the bottom of the display. The UD buttons are used
to scroll through the parameters. Use the Enter button to change and save the new set-
tings. 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 parameter, press the
Exit button to exit the menu.
The RANGE parameter is used to select the appropriate resistance range. Generally,
this should be set to 100 ohms.
The WIRES parameter sets the appropriate number of lead wires from the sensor.
This parameter can be set to 2-, 3-, or 4-wires. See Figure 4 on page for the wiring
configuration.
6.2.1.4 Callendar-Van Dusen (CVD) conversion
The following equations are used for the Callendar-Van Dusen conversion:
Certificate Value
Rtpw
a8
b8
0
0
a4
b4
Menu Functions
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