GRV-ITR-12: Channels configured as "Thermistor" or "0–400k Ohms (auto-range)" may show "Invalid Value"

Applies To:

Firmware for GRV-ITR-12

Versions Affected:

All versions prior to 1.4c

Resolved In Version:

1.4c

Symptoms:

For GRV-ITR-12 modules, if you configure a channel as either a Thermistor or 0–400k Ohms (auto-range) and have a valid resistor input, you may see the following symptoms:

Quality Code 15 and the value indicates “Invalid Value”.
In groov Manage, the Invalid Value and Quality Code 15 may flash on and off.

This issue is more likely to occur if you enabled the "Disable" feature on other channels in the same zone and/or the FastADC feature on channel 0; these features were introduced in module firmware 1.4a.

Workaround:

If you have module firmware 1.4a, do not use the Disable on channel 0 or the FastADC feature on any channel.

Resolution:

Opto 22 has resolved this issue.

Questions?

Contact: Opto 22 Product Support.
Phone: 800-835-6786 or 951-695-3080
Email: support@opto22.com

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