— A B B M E A SU R EM ENT & A N A LY TI C S | S ERV I CE I NS TRUC TI O N

SM500FPaperless recorder

Modification to prevent instrument resetting when inserting the SD card.

1 Introduction

This document describes how to modify the processor board of SM500F instruments manufactured before September 2011 if the instrument resets when an SD card is inserted.

2 Action

Implement when fault reported

Implement at next service

Information only Recall instruments

–SM500F paperless recorder

3 Processor board modification

If your instrument resets when an SD card is inserted, the following modification should resolve the issue. If you have any problems or are not sure about this procedure, please contact Recording & Control Technical Support.

To modify the processor board:1 Remove the processor board as described in Information

Sheet INF08/006-EN.

2 Remove R96 (if fitted):

3 Fit a 47 µH inductor across the pins of D9 and TR1 as shown:

4 Replace C121 with a 10 µF capacitor:

5 Refit the processor board as described in Information Sheet INF08/006-EN.

NOTICE If you cannot replace the components locally, the alternative solution is to replace the processor board.

SI/

Ran

dC

/00

7-E

N R

ev. A

0

8.2

019

—We reserve the right to make technical changes or modify the contents of this document without prior notice. With regard to purchase orders, the agreed particulars shall prevail. ABB does not accept any responsibility whatsoever for potential errors or possible lack of information in this document.

We reserve all rights in this document and in the subject matter and illustrations contained therein. Any reproduction, disclosure to third parties or utilization of its contents – in whole or in parts – is forbidden without prior written consent of ABB. © ABB 2019

—ABB LimitedMeasurement & Analytics Howard Road, St. Neots Cambridgeshire, PE19 8EU, UKTel: +44 (0)870 600 6122 Fax: +44 (0)1480 213 339 Email: instrumentation@gb.abb.comabb.com/measurement

ABB Inc. Measurement & Analytics125 E. County Line RoadWarminster, PA 18974USATel: +1 215 674 6000Fax: +1 215 674 7183