Teledyne M3 Series Service Note

TELEDYNE
INSTRUMENTS
Advanced Pollution Instrumentation
A Teledyne Technologies Company
9480 Carroll Park Drive, San Diego, CA 92121-2251
Phone (858) 657-9800 Fax: (858) 657-9818 Toll Free 1800 324-5190
E-mail: api-customerservice@teledyne.com
INSTRUCTIONS FOR REPLACING THE DETECTOR/PREAMP IN A TAPI M3XX ANALYZER
I. PURPOSE:
The purpose of this service note is to provide instructions on how to replace detectors in an M3XX
analyzer. This applies to Teledyne API model M300/M300H/M360 and the M320.
II. TOOLS:
Phillips screwdriver
III. PARTS:
009530000
IV. PROCEDURE:
1. On the analyzer, press SETUP-MORE-VARS and change the password to 929. Press ENTR.
2. Press NEXT until you see RS232_MODE record this number. Press NEXT until you see
FACTORY_OPTIONS. Write down the number that this variable is set to.
3. Remove power to the analyzer.
4. Remove the top cover from the analyzer.
5. Locate the detector/preamp cover. This is mounted in the left rear corner of the analyzer (on top of
the bench). Remove the two #6 screws and remove lift off the cover. (Location of screws shown in
figure 1)
6. Follow the cable from the detector to the main board and disconnect it at the main board.
7. Follow the cable from the detector to the Power Supply Module and disconnect at the Power Supply
Module.
8. The detector/preamp board is secured onto standoffs by two screws. There are also two holes in the
PCB (near the detector), which allow you to insert a screwdriver down through the PCB to access the
two screws, which secure the detector to the bench. (Locations of screws shown in figure 2.)
9. Remove the two screws holding the detector to the bench. Remove the two screws holding the
detector PCB to the standoffs. (Location shown in figure 2.)
10. Remove the entire detector assembly from the bench ensure that the o-ring for the detector is
removed as well. Protect the detector from ambient light by wrapping the detector in a piece of
aluminum foil.
11. Replace the o-ring that was removed with the detector and replace with the orange o-ring that comes
with the new board.
12. NOTE: The lock washers securing the detector to the bench must be replaced with two #4 flat
washers. Install the new detector inserting the small screws with flat washers through the detector
flange, and then carefully positioning the detector into the hole in the bench. Hand tighten the
screws. Install the two screws with lock washers for the preamp board, and then snug down the
detector screws. CAUTION! DO NOT TIGHTEN THE TWO DETECTOR SCREWS TO
MORE THAN 30 IN/LBS.
13. Perform a leak test on the bench assembly.
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a. Bypass the sample pump by connecting the input and output lines.
b. Connect the leak checker to the exhaust port on the rear panel.
c. Cap the sample port.
Instructions for Replacing the Detector/Preamp in a TAPI M3xx Analyzer
Service Note
02-014 Rev C
Page 1 of 4
02-014C
2 May, 2007