| PROPER CALIBRATION USING HAND SAMPLES Lab samples are not always accurate. To help insure accurate calibration, please consider these guidelines before adjusting your transmitter. |
Basic Calibration Rules
- Make an Output Adjustment when a series of lab results shows a consistent error in the same direction.
- After the First Zero Adjustment, output adjustments should be one half the error shown between the lab and the transmitter.
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Error Evaluation Rules
- When does an error warrant an Output Adjustment TEMCO Engineering recommends two different tolerance ranges.
- 1st Tolerance range from no error to the maximum desired error. Recommended range of +/- 5% of the consistency output.
- 2nd Tolerance range from the maximum desired error to the maximum excepted error. Recommended range of +/- 10% of the consistency output.
Tolerance range of 5% and 10% are general guidelines that can be changed based on the application. |
Output Adjustment Guidelines
| Error Recorded |
Output Adjustment Recommended |
| If the transmitter reads within the 1st Tolerance range (+/- 5 % error) |
Do not adjust the transmitter. |
| If the transmitter reads outside the 1st Tolerance range but within the 2nd Tolerance range (+/-5% to +/-10% error) |
Wait for your next scheduled sample test before making adjustments to the transmitter. |
| If the transmitter reads outside the 2nd Tolerance range +/-10% tolerance of the average sample. |
Verify error with an addition sample and make an output adjustment on the transmitter to correct the error. |
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