Data Trawler - Event Details

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Event details

Voyage: IN2021_V04       [details]
Subject: MFC is not working properly
When: 2021-07-04 16:07:43 UTC

- entered into Elog/Everlog as 2021-07-04 16:07:43
Log: in2021_v04/Atmospherics
Equipment: CPC 3750

Condensation Particle Counter (TSI 3750) [view]
Position: Latitude: -11.68383 Longitude: 109.85617

- entered into Elog as 11 41.03 S, 109 51.37 E
Action: Fault
Steps taken:

MFC was blocked with butanol and could not maintain the set flow rate.

Cause could be a problem with catchpot drain system and is being investigated.

Steps taken:

- I cleaned the MFC and reinstalled

- the flow rate appeared to be stable, however the CPC concentration was too high

- Checked the flow rate with the Gilibrator and the actual flow rate was too high (~1440ccm)

- I took the MFC apart again to ensure it was put together correctly, flow rate was still too high

- I adjusted the set point of the MFC until the flow rate was 1000ccm (set point is now 0.66LPM)

- did a zero check


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