Opto 22

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KB49250
Improved true power readings at low current range from SNAP‑AIPM
Revision:  2.0
Published:  4/24/2006
Applies To
SNAP-AIPM
Versions

MORE INFORMATION

The following instructions explain the manufacture date code. Modules with a date code prior to JEXXXXXXEJ have not been updated, and require a return RMA. Modules with a special marking of ¢107 have been updated.

  1. The first two characters in the Build Code is the year of manufacture. The last two characters in the Build Code is the week of manufacture.

  2. The year and week is decoded by the following chart:

  3. 1 = A 3 = C 5 = E 7 = G 9 = I
    2 = B 4 = D 6 = F 8 = H 0 = J

The example below was manufactured in the year JE (05, which is 2005) and in week EJ (50, which is in December).

SYMPTOMS

At the low current range (less than 10% of the current range), the true power reading (from point 3) could sometimes exceed or be less than the calculated value (VRMS x ARMS) from VRMS (point 1) and ARMS (point 2).

CAUSE

Less resolution at the lower current range caused the above symptoms.

RESOLUTION

Opto 22 has corrected this issue. If you are experiencing the above symptoms, contact Opto 22 Product Support to discuss your system’s circumstances and to request a return RMA to correct your module.

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

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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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