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1594A/1595A Super-Thermometer
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36
Type Conversion Coefficients Equations
THERMISTOR R(T) POLYNOMIAL B0, B1, B2, B3
RB
t
i
i
i
[] exp
[] .
Ω=
+
=
∑
0
3
1
273 15°C
T(R) POLYNOMIAL A0, A1, A2, A3
tC
AR
i
i
[]
[ln[]]
.°= −
=
∑
1
273 15
1
0
3
Ω
Note: With ITS-90 conversion, where subranges overlap, the high subrange supersedes the low subrange. If only subrange
5 is used in a probe denition, select subrange 5 for both High Subrange and Low Subrange. If a subrange is set to NONE,
all temperatures will be based on the programmed subrange (alerts in measurement screen inform the user when a dened
ITS-90 subrange is exceeded, see Display Settings submenu in Display Menu).
The following are the Add Probe Screen function keys.
5.7.2.1.1 TEST CALCULATION (F1)
MAIN MENU | PROBE MENU | ADD PROBE |
The Test Calculation function key helps the user verify the probe calibration coefcients were entered correct-
ly. A resistance is entered and a temperature is calculated based on the calibration coefcients. The calculated
temperature is compared with the probe’s calibration report to verify correct coefcient entry.
5.7.2.1.2 SAVE (F2)
MAIN MENU | PROBE MENU | ADD PROBE |
The Save function key saves the newly entered probe information into the Probe Library. Exiting without
selecting SAVE cancels all changes.
5.7.2.1.3 CANCEL (F5)
MAIN MENU | PROBE MENU | ADD PROBE
The Cancel function key exits the Add Probe screen without saving changes.
5.7.2.2 COPY PROBE (F2)
MAIN MENU | PROBE MENU |
The Copy Probe function key allows the user to create a new probe denition based on an existing denition.
In the Probe Menu screen, select the probe denition to be copied. Press the COPY PROBE (F2) function
key. Update the PROBE ID eld with a unique probe ID. Press the SAVE (F2) function key to save the copied
denition. If a unique ID is not entered, the ID will be appended with a _1 automatically.
5.7.2.3 EDIT PROBE (F3)
MAIN MENU | PROBE MENU |
The Edit Probe screen is used to edit probe denitions that have been entered into the Probe Library. When
Edit Probe is selected, the same probe denition elds found in the Add Probe screen are shown. Refer to Sec-
tion 5.7.2.1, ADD PROBE (F1), on page 34 for a full description of each eld.
Changes made in the Edit Probe screen are not saved until the SAVE (F2) function key is selected. The EXIT
key or CANCEL (F5) can be selected at any time to exit without saving changes.