Fluke 9190A - Terminology

Calibration
Temperature Source Calibration 4
4-5
Terminology
Table 4-1 lists the terms that are used throughout this procedure.
Table 4-1. Calibration Terminology
Term Definition
UUT Unit under test (for this procedure, this is the 9190A)
Test Sleeve Insert A cylindrical aluminum insert with drilled probe holes that fits into the UUT.
Readout Electronic device that can measure the probe resistance and convert it to
temperature.
PRT Platinum Resistance Thermometer (also referred to as a temperature probe).
Primary PRT or
Primary Reference
The temperature probe that is placed in the insert front hole at 0 mm. (Probe is
bottomed out in the front-insert hole.) See Figure 4-2.
Secondary PRT or
Secondary Ref
The temperature probe that is placed in the insert rear hole at 30 mm up from the
bottom of the Insert. The Reference Probe bottoms out at 30 mm in the rear insert
hole. Figure 4-2.
As Found Data Data taken on the UUT before it is adjusted.
As Left Data Data taken on the UUT after it is adjusted.
SETPOINT Target temperature value the UUT controls to.
Axial Uniformity
Error or Uniformity
Error
The difference in temperature at one height in the UUT temperature block to a
different height in the temperature block along the vertical axis.