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Shutdown Symptoms
6
Troubleshooting and Maintenance Guide
89
Hydrogen Shutdowns
Hydrogen gas may be used as a carrier gas. When mixed with
air, hydrogen can form explosive mixtures.
The instrument monitors inlet and auxiliary gas streams. If a
stream is unable to reach its flow or pressure setpoint and if
that stream is configured to use hydrogen, the instrument
assumes that a leak exists. It will warn you with a beep after 25
seconds, and it will continue to beep in intervals. After about 5
minutes, the instrument will shut down components to create a
safe state. The instrument:
•
Displays
Hydrogen Safety Shutdown
.
•
Closes the carrier supply valve to the inlet and closes and
turns off both pressure and flow controls. When viewed,
these parameters will flash
Off
.
•
Opens the split vent valve in the inlet.
•
Turns off the LTM column heaters.
•
Turns off the inlet, guard column enclosure, and GC/MSD
transfer line heaters. When viewed, these parameters will
flash
Off
.
•
Sounds an alarm.
To recover from this state:
1
Fix the cause of the shutdown:
•
Replace the inlet septum.
•
Replace the inlet O-ring.
•
Check for broken column.
•
Check the supply pressure.
•
Check the system for leaks. See
2
Power cycle the instrument.
3
After the instrument powers back on, from the electronic
keypad click the key for the device that initiated the
shutdown. Scroll to the pneumatic parameter that is
flashing
Off
, then click
[On]
or
[Off]
. For example, if the inlet
ran out of carrier gas, click
[Inlet]
, scroll to the pressure or
flow parameter, then click
[On]
.
Содержание 5975T LTM GC/MSD
Страница 1: ...Agilent Technologies Agilent 5975T LTM GC MSD Troubleshooting and Maintenance Guide...
Страница 10: ...10 Troubleshooting and Maintenance Guide...
Страница 32: ...32 Troubleshooting and Maintenance Guide 2 Concepts and General Tasks...
Страница 72: ...72 Troubleshooting and Maintenance Guide 3 Chromatographic Symptoms...
Страница 86: ...86 Troubleshooting and Maintenance Guide 5 ALS Symptoms...
Страница 98: ...98 Troubleshooting and Maintenance Guide 7 Instrument Power On and Communication Symptoms...
Страница 108: ...108 Troubleshooting and Maintenance Guide 9 Troubleshooting Tasks...
Страница 150: ...150 Troubleshooting and Maintenance Guide 10 General Maintenance Figure 16 Replacing filaments Filament 1 Filament 2...
Страница 166: ...166 Troubleshooting and Maintenance Guide 10 General Maintenance...
Страница 214: ...214 Troubleshooting and Maintenance Guide 13 Analyzer...
Страница 239: ...Parts 15 Troubleshooting and Maintenance Guide 239 Figure 39 LCP replacement parts LCP assembly and fascia...