Thermo Scientific Micro-Tech 9201 - Overview

Maintenance and Troubleshooting
Analog Input/Output Problems
Thermo Fisher Scientific Micro-Tech 9101/9201 Reference Manual, Rev J 4-9
 Unpopulated (single out).
The troubleshooting procedures are the same for each but the wiring is
different. For this reason, both types (populated and unpopulated) are
presented side-by-side below.
The troubleshooting procedures consist of two sub-sections that deal
with the following. (Please be sure to follow the correct one.)
 Analog (current) output(s)
 Analog (voltage) inputs
An analog signal failure could be caused by the following.
 Failed analog board
 Bad or incorrect wiring
 Remote device failure
 CPU board failure
The troubleshooting procedures listed below consist of three simple
checks, as follows.
 Source voltage confirmation.
 Verify output directly from the Micro-Tech’s optional printed-circuit
board assembly.
 Verify analog circuit loop.
Both analog inputs and outputs are defined in “Main Menu 4,” as
follows.
 Analog output (IO Define Scroll 1)
 Analog input (IO Define Scroll 2).
In addition, an analog output can be forced to a specific value in “Main
Menu 3,” as follows.
 Test Scroll 5A (analog output #1).
Overview