DAS Tools mA Ratio test failure known issue (Merc40)

1 Overview

There is a known issue that mA Ratio test fails at Module #1 (Merc40 Detector system). If the failed channel # is berween 17 to 28, the failure can be ignored. This document explains how to identify the failed channel number. Affected software version is 13HW38.14 SP2.1 or earlier. And it’s fixed at Service Pack 2.2.

2 Procedure

Look at the following log.

/usr/g/service/state/ssw.dastools_maratio01.hist

The channel number of failure is shown.

Below is example of not trouble.

mA Ratio Test: TEST FAILE
DETECTOR ROW 1B (33)
mA Ratio Test:   4 BAD CHANNELS WERE DETECTED IN THIS ROW
mA Ratio Test:   Chan Det.Mod Mod.Cell  VCS# Bad Chan Type        Spec Check Result                  
mA Ratio Test:   28      1       28      1       SHORT          *** PASSED CHECKS **

        

This example shows Channel# is 28, then it’s not a trouble.

Also the failure can be ignored if Fastcal passed without error.