Fluke 1551A Ex Calibration Manual

1551A Ex/1552A Ex
Calibration Manual
10
The command will set the value of the CAL:USER:TEMP3 parameter to the given
temperature and automatically adjust the CAL:USER:ADJ3 parameter to cause the
Product to measure the given temperature accurately. The adjustment made here will not
affect the measurements at the other Adjustment temperatures.
Allow the readings of the Product to settle and then verify that the readings match the
temperature of the reference thermometer well within the specified accuracy of the
1551A Ex/1552A Ex.
Set the Calibration Date
The date of calibration should be stored in the Product using the following command:
CAL:DEV:DATE <year>,<month>,<day>
Parameters <year>, <month>, and <day> are numbers representing the year, month, and
day of the month respectively.
After all the adjustments have been made and the calibration date has been set, protection
of the calibration parameters should be restored using the following command:
SYST:PASS:CDIS
(Protection will always be restored when the Product is switched on.)
Evaluate as-left Measurement Errors
After all adjustments have been made, the Product should be subjected to a final test to
ensure that it is measuring accurately over its entire range. The measurements are
collected and errors are evaluated in the same way that was explained in “Evaluating As-
found Measurement Errors.” Table 9 may be used to record the as-left data.
Table 9. As-left Measurement Errors
Point Reference (fill in) 1551A Ex/1552A Ex (fill in) Error (fill in)
1
2
3
4
5
Record as-left Calibration Parameters
As the last step in the calibration procedure, the final values of the Product calibration parameters
should be recorded. The commands required to read the values of the calibration parameters are
given in Table 10. Each command must be terminated with a carriage return character. The table
may also be used to record the values of the calibration parameters.
Table 10. As-left Calibration Parameters
Parameter Command Value (fill in)
TEMP1 CAL:USER:TEMP1?
ADJ1 CAL:USER:ADJ1?
TEMP2 CAL:USER:TEMP2?
ADJ2 CAL:USER:ADJ2?
TEMP3 CAL:USER:TEMP3?
ADJ3 CAL:USER:ADJ3?
DATE CAL:DEV:DATE?

Fluke 1551A Ex Specifications