In order to optimize the performance characteristics of the Signet 2551 Magmeter in batching applications, we recommend that you follow these simple guidelines when installing and programming the 2551.
1. Keep the Magmeter electrodes wet at all times.
• If the Magmeter electrodes are in an empty pipe for more than a few minutes between batches, the electrode
surface will undergo electrochemical changes and will require soaking in the process fluid before a proper
measurement can be re-established. In order to avoid this, we recommend that the 2551 be installed in a “trap”
that will ensure that the electrodes are always wet.
2. Purge the air from the piping systems and keep it out.
• Avoid air bubbles passing the sensor. Bubbles can cause a short-term disturbance in the flow measurement which will reduce the batch accuracy.
3. Use the 2551 Setup Tool to tailor the Magmeter settings for batch operation.
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The averaging time should be less than 5% of the batch duration. The factory setting is an averaging of 14 seconds and GF Signet recommends reducing this setting to the very lowest value possible. This setting requires use of the 2551 Setup Tool which can be downloaded by clicking HERE.
• If longer averaging is needed to stabilize the flow rate reading, setting a “Sensitivity” value may allow the Magmeter to respond to flow rate changes more quickly.
4. Use the AutoCal feature of the Signet 5600 Batch Controller
• Auto-calibration will take into account factors such as valve closure time and residual flow.
• All batch applications should be calibrated in place for the best performance.
