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Operating instructions digital oval gear meter G
6.3.2 Calibration during operation
This procedure basically involves discharging of liquid into a calibration vessel under actual operating
conditions (ow, rate, viscosity etc.). The procedure must be carried out with utmost care.
Tip
Note carefully the following points in order to guarantee proper calibration:
Have your equipment properly vented before calibration.
Use a calibrated vessel holding at least 5 litres with a precise full mark.
For calibration, discharge a certain amount of test liquid with a constant ow rate, exactly as
you would do in normal operation. Continue until the vessel is full.
Do not decrease the ow rate when you approach the full mark. Instead, turn the spigot on
and o and ll the vessel in small batches, but make sure the ow rate remains unchanged.
When you‘re nished be sure to wait a few minutes and let air bubbles escape that may still be
in the calibration vessel. Otherwise there is a danger you get a wrong value because the level
in the vessel may still go down.
Be sure to carry out the following procedure correctly.
6.3.3 Meter calibration during operation
Action Display
1 NONE
Meter is in default standby mode, not counting.
2 PRESS TOTAL SEVERAL SECS
Meter switches to calibration mode, displaying „TOTAL“.
Display no longer shows total, but valid K Factor. „FACT“ or
„USER“ indicates whether valid calibration factor is (Factory
K Factor or User K Factor).
3 PRESS RESET SEVERAL SECS
Meter shows „TOTAL“ display -> resettable total register
displays zeroes. Meter is now ready for operation
calibration.
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