Zero Point Adjustment

• Coriolis Mass Flow Meters
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• Operation and Maintenance
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• Operation and Maintenance
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• Zero Point Adjustment

After installation and all wiring, a zero point adjustment (zero calibration) procedure should be performed. This procedure sets the base point corresponding to zero flow. Without actual flow there is a time delay between signal coils, this delay assumed as zero point. To perform this procedure, follow these steps:

• Apply power to the coriolis mass flow controller and let it warm up for at least 30 minutes;
• Let the measuring medium flow through the coriolis mass flow controller , as long enough for thermal equilibrium
• Close the valve located after the coriolis mass flowmeter;
• Make sure that the coriolis gas flow meter’s tubes are completely filled with fluid;
• Close the valve located before the coriolis mass flowmeter (see Fig. 2.16);

Make sure that the fluid in the coriolis gas flow meter is completely still;

Common base

Figure.2.16 installation for zero adjustment

• Using the root menu (see Figure 2.14) press ↓ button several times to move to the Menu item “Configure”. Press E button and enter the password (default password is 000000). To enter the password press ↓ to increment the currently selected digit, to move to the next digit press → After successful password entry a message “Zero calibration” will appear. Press E to start zero calibration procedure. A message “Zeroing?” will appear. Press E to confirm that. Zero calibration procedure lasts for 30 seconds, the count down time is displayed.