1. Model 2537A Training Course Detailed Instrument Description Rev: Nov. 2003

2. Installation Power Power 115 VAC or 230 VAC, 200 VA 115 VAC or 230 VAC, 200 VA Should be regulated ±5% Should be regulated ±5% Argon Argon 99.995% or better 99.995% or better One tank lasts for 2-3 months of continuous use One tank lasts for 2-3 months of continuous use Zero Air Zero Air Final Hg filter and pressure regulator provided Final Hg filter and pressure regulator provided Requires 3 to 60 PSI, 1.5 l/m instrument air Requires 3 to 60 PSI, 1.5 l/m instrument air Used only during startup and recalibrations Used only during startup and recalibrations

3. Sample Line Vital part of overall system Vital part of overall system Heated Teflon ® line Heated Teflon ® line Glass high volume manifold Glass high volume manifold No metal components! No metal components! Periodic QA/QC tests on sample line advisable Periodic QA/QC tests on sample line advisable

4. Rear Panel Connections

5. Top Components Top panel provides access to: Top panel provides access to: Valve assembly & cartridges Valve assembly & cartridges Microprocessor Microprocessor Main PCB Main PCB Detector module & lamp Detector module & lamp

6. Bottom Components Bottom panel provides access to: Bottom panel provides access to: Zero/Sample switching solenoid Zero/Sample switching solenoid Permeation source Permeation source Power supplies & internal fuses Power supplies & internal fuses Pump, MFM, buffer tank & MFC Pump, MFM, buffer tank & MFC Argon supply valve, filter & pressure regulator Argon supply valve, filter & pressure regulator

7. Detailed Flow Diagram

8. Valve Assembly

9. Pure Gold Cartridge (Pat’d)

10. Atomic Fluorescence Detector

11. Lamp Stabilizer Board

12. Perm Source Flow Diagram

13. Permeation Source

14. Menu Tree

15. End – Detailed Section