Fluke 1551A-12 Calibration Guide - Page 18

Set the Calibration Date, Evaluate as-left Measurement Errors, 1551A Ex/1552A Ex.

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1551A Ex/1552A Ex Calibration Manual 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 ,, Parameters , , and 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 Asfound Measurement Errors." Table 9 may be used to record the as-left data. Point 1 2 3 4 5 Table 9. As-left Measurement Errors Reference (fill in) 1551A Ex/1552A Ex (fill in) Error (fill in) 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. Parameter TEMP1 ADJ1 TEMP2 ADJ2 TEMP3 ADJ3 DATE Table 10. As-left Calibration Parameters Command CAL:USER:TEMP1? CAL:USER:ADJ1? CAL:USER:TEMP2? CAL:USER:ADJ2? CAL:USER:TEMP3? CAL:USER:ADJ3? CAL:DEV:DATE? Value (fill in) 10

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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?