Agilent Technologies 355 SCD User manual

Agilent Technologies

Agilent 355 SCD and 255 NCD

Quick Reference Guide

Detector Startup

Complete Startup (from total shut down)

1Turn on the detector and establish carrier gas flow.

2Turn on the vacuum pump with the toggle button located on the front panel

of the Detector.

3Turn the instrument from Standby to On, and allow the system to evacuate

for approximately 1 minute.

4Turn on the air to the ozone generator and set the regulator inside the front

door of the Detector to between 3 and 6 psig.

5Turn on the ozone generator.

6Turn on the Interface Controller with the toggle on the back panel of the

box.

Daily Startup (from daily shutdown)

1Turn the instrument from Standby to On, and allow the system to evacuate

for approximately 1 minute.

2Turn on the air to the ozone generator and set the regulator inside the front

door of the Detector to between 3 and 6 psig.

3Turn on the ozone generator.

Detector Shutdown

Daily Shutdown (Standby Mode)

1Turn off the ozone generator with the button on the front of the Detector.

2Turn down the oxidant flow to 0 with the regulator located in the front door

of the Detector.

3Turn the Detector power to Standby.

It is recommended to leave the vacuum pump and Dual Plasma Controller

operating at all times.

2Quick Reference Guide

Agilent 355 SCD and 255 NCD

Complete Shutdown (long periods of time)

1Turn off the ozone generator with the button on the front of the Detector.

2Turn down the air flow to 0 with the regulator located in the front door of

the Detector.

3Turn the Detector power to Standby.

4Turn off the power switch on the Controller and allow at least 15 minutes

for the burner to cool.

5Turn off the vacuum pump.

6Turn off the Detector gases.

Table 1 Typical Operating Conditions

*Oil-free pump

Table 2 Maintenance Schedule

*Operating life is based on the total time logged during operation of the 355 SCD with the burner and ozone

generator on.

Condition SCD NCD

Detector Pressure (Torr) 4-8 (6-12*) 4-10

Dual Plasma Controller Pressure (Torr) 300-400 100-250

Burner Temperature (°C) 800 900-950

Hydrogen Flow Rate (sccm) 40-50 4-6

Oxidant Flow Rate (sccm) 60-65 (air) 8-12 (oxygen)

Background Noise (mV) 0.3-2.0 0.3-1.0

Component/Material Operating Life*

Pump Oil ~3 month

Oil Coalescing Filter ~3 months

Chemical Trap ~3 months

Agilent 355 SCD and 255 NCD

Quick Reference Guide 3

Agilent Technologies

©Agilent Technologies, Inc. 2007

Printed in USA

First edition, March 2007

Agilent Technologies, Inc.

2850 Centerville Road

Wilmington, DE 19808-1610 USA

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