Commands and Tips for Third-Party Devices
Varian CP-3800 GC: General

In addition to the  General Device Commands, the Varian CP-3800 GC supports the following commands and properties (please note that the display Filter level determines which commands and properties are displayed):

 

Property

Range/Value

Description

AtmosphericPressure˛

0.000 - 2.067 bar

Indicates the atmospheric pressure

Cryo

On/Off

(If cryo cooling is installed) Enables or disables cyro cooling.

CryoHasTimeout˛

Yes, No

(If cryo cooling is installed) = Yes if the temperature zone did not reach the target temperature, despite Cryo.

CryoTimeout

0.01 - 999.99 min

(If cryo cooling is installed) Time that the GC waits before turning off the cooling if no sample has been injected.

CryoThreshold

30-450°C

(If cryo cooling is installed) Temperature above which the GC shall use cryo for cooling.

EndRunTime˛

0.01 - 999.99 min

Actual run time of the current program.

Fault˛

Fault, OK

Indicates whether a fault occurred in the GC*.

OvenFault˛

Fault, OK

Indicates whether a fault occurred in the column oven.

OvenPower˛

On, Off

Indicates whether the column oven is on.

OvenReady˛

Ready, NotReady

Indicates whether the column oven has reached the target temperature and is ready.

ProtocolVersion

n/a

n/a

Protocol version of the instrument (must be '7').

RunState

NotReady, Equilibrating, Stabilizing, Monitoring, Ready, Running

Indicates the status of the GC.

RunTime

0.01 - 999.99 min

Indicates the actual retention time during sample processing.

StabilizationTime˛

0.00 - 10.00 min

Time that the GC waits after reaching the target temperature.

Temperature

 

 

Properties related to the column oven temperature.

Temperature.
Value˛

-99°C - 450°C

Current temperature.

Temperature.
Nominal

-99°C - UpperLimit

Sets the nominal temperature.

Temperature.
UpperLimit

50 - 450°C

The system aborts the sample batch and starts emergency handling if the temperature exceeds the upper limit.

 

 Note:  

˛ These properties are read-only.

 

Control with or without a non-controlled autosampler:

To synchronize the injection command of the GC with the start of data acquisition, enter the following command instead of the Inject command:

 Wait GC.RunState=Running

This applies to injections via a headspace sampler or a valve.

 

For installation details, refer to Hardware Installation: Installing and Controlling Third-Party Devices  Varian CP-3800 GC: Installation in the Administrator Help section.