Shutdown (Defective) Device - Agilent Technologies 7890 Series Troubleshooting Manual

2
ALS and Detector Symptoms

Shutdown (Defective) Device

C A U T I O N
40
By default, the GC monitors the status of all configured devices
(inlets, detectors, valve box heaters, valves, oven heater, EPC
modules, and so forth) and becomes ready when all of them
reach setpoint. If the GC senses a problem in one of these
devices, the GC will either never become ready, or may go into a
shutdown state to protect itself or prevent a safety hazard.
However, there may be a time when you do not wish to have the
readiness state of a device prevent a run from starting. An
important example is when an inlet or detector heater is
defective. Normally, this fault prevents the GC from becoming
ready and starting a run. However, you can set the GC to ignore
this problem so that you can use the other inlet or detector until
the device is repaired.
Not all devices can be ignored. You can ignore the readiness
state of inlets, detectors, the oven, or an EPC module. The
readiness state of other devices and components can never be
ignored, for example, injection devices such as a switching valve
or automatic liquid sampler.
To ignore the status of a device:
1
Turn off the device's heater and gas flows as applicable.
(Make sure that it cannot create a safety hazard.)
Press [Config], then select the element.
2
Scroll to Ignore Ready and press [On/Yes] to set it to True.
3
You can now use the GC until the device is repaired.
Do not ignore the readiness state of a device that is being used
unless you do not care if it reaches setpoint.
Be sure to return a broken device to Ignore Ready = False after it is
repaired. Otherwise, its state (temperature, flow, pressure, and so
forth) will continue to be ignored, even if using this device in the
analysis.
To consider a device's readiness, set Ignore Ready to False.
Agilent 7890 Series Troubleshooting