To Next PageTo Next PageWhy is my Celerity UNIT 1661 showing inaccurate flow (span shifts)?
Inaccurate flow (span shifts) in Celerity Measuring Instruments can be caused by temperature variations (both steady state and transient), fluctuations in inlet pressure (steady state and transient), or power supply problems and electrical interference.
Why Celerity Measuring Instruments has control problems (cannot reach setpoint, oscillation)?
Control problems such as failing to reach the setpoint or oscillation in Celerity Measuring Instruments may arise due to the differential pressure being outside the operating range, unstable inlet pressure, or cable losses causing excessive ground current.
General| Brand | Celerity |
|---|---|
| Model | UNIT 1661 |
| Category | Measuring Instruments |
| Language | English |
Explains setpoint command closure and digital MFC adjustment.
Lists Fast, Soft Start, and soft start options (seconds).
Describes Normally Closed (standard) and Normally Open (optional).
Explains 'Standard' and 'Pressure buffered' configurations.
Details zero offset detection and automatic re-zeroing.
Procedures for purging lines with nitrogen or argon.
Mounting orientation based on arrow direction and model.
Details voltage requirements and pinout configurations.
Explains access to digital MFCs via PC for monitoring and commands.
Checklist for verifying MFC operation and identifying issues.
Explains zero drift and the importance of correct zeroing.
Step-by-step guide for zeroing MFCs.
Guide on diagnosing issues before removing the MFC.
