Opto 22

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KB80562
Possible negative RMS readings from SNAP-AIPM
Revision:  3.0
Published:  4/15/2009
Applies To
Firmware for:
SNAP-AIPM
Versions
Problem was discovered in version:  
Modules manufactured March 2009
(Build code: JIXXXXXAC) and before
Problem is fixed in version:  
Modules manufactured April 2009
(Build code: JIXXXXXAE) and after

SYMPTOMS

The SNAP-AIPM module incorrectly reports negative VRMS, or negative IRMS values. If you are seeing these negative readings, then you will also see from PAC Manager (Tools→Inspect, Status Read), that the Times Discovered value for the module is greater than 0.

RESOLUTION

Opto 22 has resolved this issue. If you suspect you have a module with this problem, contact Opto 22 Product Support to discuss the issue. If it's determined the module has the described bug, you'll be given an RMA to send the module in for repair.

Relevant Downloads
No relevant downloads have been specified.
Questions? Contact Opto 22 Product Support.
Phone: 800-835-6786 or 951-695-3080
Email: support@opto22.com

DISCLAIMER

This Opto 22 Knowledge Base ('OptoKB') article is intended to provide general technical information on a particular subject or subjects and is not an exhaustive treatment of such subjects. Accordingly, the information in this OptoKB article is not intended to constitute application, design, software, or other professional engineering advice or services. Opto 22 may modify the OptoKB articles at any time. Before making any decision or taking any action which might affect your equipment, you should consult a qualified professional.

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