VTI Instruments Corp.
APPENDIX D
110
•
Stdev: A list of the standard deviations from each of the records acquired during the
measurement
•
Reading: The final measurement value, obtained by averaging all the samples of all
records acquired during the measurement
S
ELF
/F
ULL
C
ALIBRATION
R
EPORT
The calibration report file is a human-readable version of all the information found in the
calibration results file. It is organized as a comma-separated list (CSV) file. It has the following
sections, each consisting of the listed columns:
•
Self/Full Calibration Report
o
Date – the date the calibration was done
o
Model – the model of the card being calibration
o
Serial – the serial number of the main board
o
Daughter Card Serial – the serial number of the daughter board
o
Firmware Version – the firmware version of the card
•
Internal References
o
Channel – the channel that the measurement is for
o
Clock Frequency – the clock frequency used when making the measurement
o
Reference – the name of the voltage reference being measured
o
Value – the value of the reference as measured by an external DMM during full calibration
•
Channel Measurements (Filtered ADC Counts)
o
Channel – the channel that the measurement was taken with
o
Clock Frequency – the clock frequency used to make the measurement
o
Range – the range used to make the measurement
o
Reference – the name of the voltage reference being measured
o
Measurement – The final averaged measurement value, in units of ADC counts
•
New Channel Adjustments
o
Channel – the channel that the adjustment is for
o
Clock Frequency – the clock frequency that the adjustment is for
o
Range – the range that the adjustment is for
o
Adjustment – the name of the adjustment
o
Value – The new calculated value of the adjustment
o
Minimum – the minimum allowed value of the adjustment
o
Maximum – the maximum allowed value of the adjustment
o
Error Ratio – The ratio of the new value’s deviation from nominal to the allowable error range
((value - nominal) / ((maximum - minimum)/2)); a value of 1.0 indicates equal to the
maximum, -1.0 equal to the minimum.
o
PASS/FAIL – PASS if |Error Ratio| < 1.0, otherwise FAIL
•
IEPE Adjustments
o
Channel – the channel that the adjustment is for
o
Adjustment – the name of the adjustment
o
Value – The new calculated value of the adjustment
o
Minimum – the minimum allowed value of the adjustment
o
Maximum – the maximum allowed value of the adjustment
o
Error Ratio – The ratio of the new value’s deviation from nominal to the allowable error range
((value - nominal) / ((maximum - minimum)/2)); a value of 1.0 indicates equal to the
maximum, -1.0 equal to the minimum.
o
PASS/FAIL – PASS if |Error Ratio| < 1.0, otherwise FAIL
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