Calibration
9190A Input Panel Calibration 4
4-17
Environmental Conditions
Laboratory environmental conditions required to complete this procedure:
• Temperature range: 23 °C ±4 °C
• Ambient relative humidity: below 60 %
Input Panel Calibration Procedure
Input Panel Calibration/Tests
Notes
• The inputs on the Input panel can be calibrated in any order. When a
calibration of a input is started, finish the procedure before another
input calibration is started.
• Before thermocouple tests are started, the instrument must be turned
on and the heat source set to 25.0 °C for at least 30 minutes to allow
sufficient time for warm-up.
• Thermocouple tests requires the technician to connect or disconnect
the voltage source and Type E TC probes.
Readout Specifications
See Chapter 1 for the Input panel specifications
.
Reference Accuracy Test
The Reference Accuracy Test is used to collect As Found, Alignment, and As Left data
(see Table 4-13).
Note
All Reference Accuracy Tests are to be performed in Ohms.
Table 4-13. Reference Probe and UUT PRT Input Process
# Test Name Nominal(s) Ω Notes
1 Reference Accuracy Test 0, 25, 100, 200, 400 As Found/Alignment data - Reference
input
2 UUT PRT 4-wire Accuracy Test 100 As Found data – UUT input
3 UUT PRT 3-wire Accuracy Test 100 As Found data – UUT input
4 Reference Accuracy Alignment - Calculate offsets with Alignment data
5 Reference Accuracy Test 0, 25, 100, 200, 400 As Left data – Reference input
6 UUT PRT 4-wire Accuracy Test 100 As Left data – UUT input
7 UUT PRT 3-wire Accuracy Test 100 As Left data – UUT input
1. Turn on the PRT reference input on the Calibrator (see “Reference Probe Input
Setup” in Chapter 2.
2. Set the instrument conversion type for the PRT reference input to resistance.
3. Connect the short (0 Ω).
4. Let readout stabilize for 70 seconds.
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