Fluke 9190A - As Found Data Collection

9190A
Operators Manual
4-8
As Found Data Collection
If As Found data is not needed, do not perform this procedure and start the Uniformity
Alignment 1
st
Iteration procedure on page 4-9.
Collect the data as follows:
1. Set the UUT SETPOINT temperature to 140 °C. Monitor the UUT Stability Status
indicator to make sure the temperature is stable.
2. Let the UUT to soak at the 140 °C SETPOINT for 45 minutes after the Stability
Status indicator shows that the temperature is stable (flat line). Take 40
measurements from the primary PRT and the secondary PRT simultaneously.
Calculate the average temperature and 2σ (2 x standard deviation) of the
measurements taken. Also calculate the uniformity error as follows:
Uniformity Error = PRT secondary – PRT primary
Enter the results in Table 4-3 and Table 4-4. Compare the results to the specifications
in Chapter 1.
3. Continue to record the temperature of the primary reference probe for 30 minutes and
compute the standard deviation and multiply by two. Enter the result in Table 4-5.
Compare the result to the specification.
Repeat the As Found Data Collection procedure for each of the other SETPOINT
temperatures listed in Table 4-3, Table 4-4, and Table 4-5.
Table 4-3. As Found Accuracy Results
UUT
SETPOINT
°C
Number of
Samples
Average
PRT
Primary
Reading
°C
Error: PRT
Primary –
SETPOINT
°C
Specification
(±°C)
2σ PRT
Primary
2σ Limit
(over the
40
samples)
140 °C 40 0.200 °C 0.02 °C
100 °C 40 0.200 °C 0.02 °C
25 °C 40 0.200 °C 0.02 °C
0 °C 40 0.200 °C 0.02 °C
−45 °C 40 0.200 °C 0.02 °C
−95 °C 40 0.200 °C 0.02 °C