Product Alert #36
Starloggers/Starflows/Microloggers with SDI-12
Error in SDI-12 Retry Procedure
8 January 1997
Problem
This problem affects the following:
- Model 6004B Starloggers with a firmware version earlier than 22.10.
- Model 6526B Starflows with a firmware version earlier than 41.8.
- Model 8000B Microloggers with a firmware version earlier than 61.2.
When an error is detected during SDI-12 communications, the entire sequence is re-started. In some cases this will result in no data being collected. The correction will make the logger re-request only the most recent data.
In SDI-12 terms, the logger no longer re-issues the Start Measurement command, but instead just re-sends the Send Data command.
Correction
Upgrade to the latest firmware.
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