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A632424E-8E03-47E3-AB7F-62B01BD1C05FC15D11C1-D230-4E57-8647-D7D4EBE44858The AC/DC Converter is set to 9.9

I will refer too the 153 IRS as units

1. 2001with power supply on the left and terminals com2, com1, no, & MV on the right. This is the unit for which I have instructions

2 & 3 are the 2002 version

The “Clicking “Test” is

I am using 18 gauge solid core wire. Directions say nothing larger than 24!  I ran into difficulty on unit two.  

#1  A  with + DC current  connected to the unlabeled left hand terminal on unit one

    - the unit clicked as expected

   - reverse  -DC Left terminal   Nothing Happens

#3  the results are reversed  The unit clicks when -DC is plugged into A

dors not click when +D is in terminal A

#2  unable to test    Terminal unit u will not accept cable    I noticed one difference between unit 2 and the others   There is a small space (crack?) between terminals a & u on #2   see pictures

Continuity Test

Unit 1  2001

com 2  yes; com 1 no;  NO no;  NC yes

Unit 2. 2002

  Same as #1 show continuity withACC Power and NC, but not with ACC ground or no

Unit 3

surprisingly shows continuity only with ACC ground.  Decided to switch the leads placing -DC in A. With that scenario, each of the four terminal showed continuity excepting ACC power.
these results are mot helpful are they

I’m going to read the 2001 instructions again. They may have said that those units would lwork on AC or DC I’m not sure. If you haven’t looked at this I will edit and add the answer to that question


Images (2)
  • A632424E-8E03-47E3-AB7F-62B01BD1C05F: Unit 1
  • C15D11C1-D230-4E57-8647-D7D4EBE44858: Unit 2 crack?
Last edited by Don Baird
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