Uniformity Alignment 2Nd Iteration; Uniformity Alignment 3Rd Iteration - Fluke 9190A Operator's Manual

9190A
Operators Manual
8. Enter the New
9. Let the UUT soak at the -90 °C SETPOINT for 45 minutes after the change to the

Uniformity Alignment 2nd Iteration

Perform the 2
1. With the UUT still at -90 °C from the previous Uniformity Alignment 1
2. Query the UUT gradient sensor reading with this serial command:
3. Repeat this 40 times to get an average of the gradient sensor reading. This value is
4. If the magnitude of ERROR
5. Query the UUT GRAD 1 calibration parameter with this command:
6. Grad 1 is associated with UUT block temperature -90 °C. Calculate the new Grad 1
7. Enter the New
8. Let the UUT soak at the -90 °C SETPOINT for 45 minutes after the change to the

Uniformity Alignment 3rd Iteration

Perform the 3
1. With the UUT still at -90 °C from the previous Uniformity Alignment 2
2. Query the UUT gradient sensor reading with this serial command:
4-10
calibration parameter into the UUT from the front panel:
GRAD 1
> SYSTEM MENU > CALIB > CAL POINTS
parameter to the UUT with these serial commands:
SYST:PASS:CEN <password>
SOUR:SENS:CAL:GRAD1 <New_GRAD 1>
New parameter.
GRAD 1
nd
uniformity alignment as follows:
procedure, measure the ACTUAL gradient, which is the temperature of the secondary
PRT (30 mm probe) minus the temperature of the primary PRT (0 mm probe). Take
the average of 40 samples for each of the probes. Calculate as follows:
ACTUAL grad = T - T
30
SOUR:SENS:GRAD:DATA?
called "UUT grad". Calculate the Error with this formula:
ERROR = UUT grad – ACTUAL grad
1
temperature and repeat the Uniformity Alignment 1
SOUR:SENS:CAL:GRAD1?
calibration parameter as follows:
New = GRAD 1 – ERROR
GRAD 1
calibration parameter into the UUT from the front panel:
GRAD 1
> SYSTEM MENU > CALIB > CAL POINTS
parameter to the UUT with these serial commands:
SYST:PASS:CEN <password>
SOUR:SENS:CAL:GRAD1 <New_GRAD 1>
New parameter.
GRAD 1
rd
uniformity alignment as follows:
procedure, measure the ACTUAL gradient, which is the temperature of the secondary
PRT (30 mm probe) minus the temperature of the primary PRT (0 mm probe. Take
the average of 40 samples for each of the probes. Calculate as follows:
ACTUAL grad = T - T
30
or send the New
0
is less than 0.012, skip to the next Gradient calibration
1
1
or send the New
0
calibration
GRAD 1
st
Iteration
st
Iteration procedure.
calibration
GRAD 1
nd
Iteration
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