Whenever anyone is performing Calibration, they should have Raw DataSheet to note down the readings.
As readings are entered in Raw DataSheet during performing Calibration activity, readings are raw and need to process and analyzed before entering into the calibration certificate. Therefore, It is called a Raw datasheet.
The raw datasheet for Pressure Calibration is prepared according to ISO/IEC 17025:2017 and DKD R-6-1.
Raw DataSheet for Pressure Calibration of Accuracy 0.6 % or better (Table 1)
Raw DataSheet for Pressure Calibration of Accuracy greater than 0.6 % (Table 2)
Also Read: Pressure Gauge Calibration according to Standard DKD-R-6-1
Three main parts of the Raw Datasheet are:
Note down details of UUC as the name of Instrument (Pressure Gauge/Vacuum Gauge/Compound Gauge), Identification Number, Make, Range, Resolution, Accuracy, Calibration Date, Recommended Due Date, Environmental Conditions
Note down Name of Master Equipment and Identification Number
This is the most important part of the Raw Data Sheet. As Instrument is said to be Okay or Faulty according to readings entered.
The above Raw Datasheet is for pressure Gauge Calibration of accuracy less than 0.6% (Table 1) and accuracy greater than 0.6 % (Table 2)
For Pressure gauge accuracy less than 0.6 %, it is 9 point calibration. Therefore choose 9 points covering the full range including zero. Refer Table 1
For Pressure gauge accuracy of more than 0.6 %, it is 5 point calibration. Therefore choose 5 points covering the full range including zero. Refer Table 2
If Calibration Point is attained on UUC and corresponding reading is measure on Standard Pressure Gauge. Mark UUC Reading on above Table and note down corresponding UUC reading as Calibration point is attained.
If Calibration Point is attained on Master and corresponding reading is measure on UUC Pressure Gauge. Mark Master Reading on above Table and note down corresponding Master reading as Calibration point is attained.
If we are noting down UUC readings in this Column, UUC should be marked in the above table
If we are noting down Master readings in this Column, Master should be marked in the above table
Table 1
For Accuracy < 0.1 %, Two UP Cycle, and Two Down Cycles are performed.
UP—Down—UP—Down
For Accuracy 0.1% to 0.6 %, Two UP cycles and One Down Cycle are performed.
UP—Down—UP
For better results, the Three UP Cycle and Three Down Cycle are performed.
UP—Down—UP—DOWN—UP—DOWN
Table 2
For Accuracy >0.6 %, One UP Cycle and One Down Cycle are performed.
UP—Down
UP Cycle Readings are from Zero readings to Maximum Range
Down Cycle Readings are from Maximum Range to Zero reading
Average readings are Calculated as Average of Average reading of Up-Cycle and Average reading of Down Cycle
M1, M3, M5 are Up Cycles
M2, M4, M6 are Down Cycles.
For Three Up and Three down Cycles average is calculated as
[{(M1+M3+M5)/3} + {(M2+M4+M6)/3}] / 2
For Two Up and Two down Cycles average is calculated as
[{(M1+M3)/2} + {(M2+M4)/ 2}] / 2
For Two Up and One down Cycles average is calculated as
[{(M1+M3)/2} + M2] / 2
For One Up and One down Cycles average is calculated as
(M1+M2)/ 2
The deviation is the difference between Standard reading and UUC reading
Calculated as Standard Reading – UUC Reading (or) UUC Reading – Standard Reading.
Deviation or difference can be calculated either way
Ref- DKD-R-6-1
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View Comments
Thanks so for this educative presentation on pressure calibration.This is really helpful. It has broadened my knowledge of pressure calibration.
But can you I have a (Sample Readings Raw DataSheet for Two-Up and Two-Down cycle?
Thanks so for this educative presentation on pressure calibration.This is really helpful. It has broadened my knowledge of pressure calibration.
Please, can I have a (Sample Readings Raw DataSheet for Two-Up and Two-Down cycle?