Teledyne 7500 - Infrared gas analyzer - operating manual - Manual (Page 66)

66 Model 7500 Instruction Manual
Teledyne Analytical Instruments
3) How to remove measuring unit (See Fig. 7-3)
1. For Step 1 to 4, see Item 7.3.1(1), How to remove pipe cell.
2. Remove the detector output cord connector from the printed board.
3. Remove wiring to the 2-pin terminals of the infrared ray light source assembly and chopper
motor pin connector (No. 8) from the printed board.
4. Detach the 4 screws (No. 3) fastening the base plate (No. 4) to remove the measuring unit.
Note: Special care should be taken when assembling or disassembling the measuring cell to avoid the
application of force to the detector pipe or infrared ray light source unit pipe. If the pipe is deformed or
damaged by excessive force, there is a danger of gas leak, thus resulting in misoperation.
Number Name
1 Screw (for fixing light source)
2 Screw (for fixing detector)
3 Base plate
4 Light source unit
5 Screw (for fixing block cell)
6 Block cell
7 Infrared transmission window
8 O-ring
9 Detector
10 Screw (for fixing base plate)
11 Support
12 Screw (for fixing cell retainer)
13 Cell retainer
14 Pipe cell
15 O-ring
16 Infrared transmission window
17 Screw (fixing detector)
18 Detector
Fig. 7-3 Configuration of measuring unit (2-component analyzer: block cell + pipe cell)