Commands and Tips for Third-Party Devices
Varian 3400 and Varian 3600 GCs

The Varian 3400 GC and Varian 3600 GC device drivers support the following commands and properties (please note that the display Filter level determines which commands and properties are displayed):

Columns and Main Device

 

Property

Min

Max

Default

Description

CausesForNotReady

N/a

N/a

N/a

Indicates why the driver is not in Ready state (read-only).

Connected

Off

On

Off

Indicates whether the GC is connected to Chromeleon.

CryoHasTimeout

Off

On

Off

Indicates whether a cryogenic coolant time out occurs (read-only).

CryoTimeout

2.00

650.00

650.00

If no run starts after the specified time (in [min]), cooling is stopped to save coolant. To disable CryoTimeout, set the property to Infinite.

CryoToColumn

Off

On

Off

Turns cryogenic cooling for the column thermostat on and off.

CryoToInjector

Off

On

Off

Turns cryogenic cooling for the injector on and off. (For the Varian 3400 GC, this is an Injector property.)

ModelNo

N/a

N/a

N/a

Indicates the model number (read-only). This property is available only for the Varian 3600 GC.

Ready

N/a

N/a

N/a

Indicates whether the GC is ready for injection (read-only).

StabilizationTime

0.00

650.00

2.00

After reaching the desired temperature, the GC waits for the specified time (in [min]) before indicating Ready.

StabilizationTimeRemainder

N/a

N/a

N/a

Indicates how much time of the StabilizationTime is left (read-only). This property is available only for the Varian 3600 GC.

SystemState

N/a

N/a

N/a

Indicates the current GC status: Run, Equilibrate, Stabilize, Wait, Sample, Test, RunEnd, or ERROR (read-only).

TempCtrl

Off

On

On

Turns the oven on or off.

Temperature.UpperLimit

²

²

²

Sets the maximum temperature for the oven.

Temperature.Nominal

²

²

²

Sets the nominal temperature for the oven

Temperature.Value

-99°C

420°C

50°C

Indicates the actual temperature of the oven (read-only).

² The values depend on the device settings.

 

Command

Description

Connect

Connects the GC to Chromeleon.

Disconnect

Disconnects the GC from Chromeleon.

Reset

Resets the GC.

 

Auxiliary Heater

 

Property

Min

Max

Default

Description

TempCtrl

Off

On

²

Turns the auxiliary heater on and off.

Temperature.Nominal

²

²

²

Sets the nominal temperature of the auxiliary heater.

Temperature.UpperLimit

²

²

²

Sets the maximum temperature of the auxiliary heater.

Temperature.Value

-99°C

420°C

50°C

Indicates the actual temperature of the auxiliary heater (read-only)

² The values depend on the device settings.

 

Autosampler

 

Property

Min

Max

Default

Description

AirDry

Off

On

On

Enables or disables air drying after the injection.

Depth

0%

100%

90%

Sets how deep the needle moves into the vial: 0%: septum height; 100%: to the bottom of the vial.

InjectWaitTime

0.0

10000000.0

N/a

Indicates the time delay [sec] between the injection command and the inject response.

LowerAirGap

Off

On

On

Sets whether an air gap is used below the sample.

Position

101

412

101

Indicates the position of the vial used for injection. Range:

101 ... 112; 201 ... 212;

301 ... 312; 401 ... 412

PostDwell

0.00

10.00

0.10

Sets the time [min] that the needle remains in the injection port after the injection.

PreDwell

0.00

1.00

0.00

Sets how long ([min]) the needle stays in the injection port before the injection.

Purge

N/a

N/a

A_only

Sets which solvent bottles are used for the washing process: A_only, B_only, A_then_B, or No_wash

(For the Varian 3400 GC, this is an Injector property.)

SamplerStatus

N/a

N/a

N/a

Indicates the current state of the autosampler: ERROR, Searching, Washing, Sampling, Injecting, Waiting, Stop_Pin_Found, No_Vial, or Not_in_method (read-only).

SolventPlug

0.0 µl

3.0 µl

0 µl

Sets the solvent volume for the injection.

Speed

0.2

10.0

5.0

Sets the average injection speed [µl/sec]

State

Off

On

N/a

Indicates whether the autosampler has injected the sample.

UpperAirGap

Off

On

On

Sets whether an air gap is used above the sample.

Volume

²

²

²

Sets the injections volume.²

² The values depend on the syringe volume. The Varian 3600 GC supports a variable syringe volume.

 

Command

Description

Inject

Performs an injection.

 

Injector

 

Property

Min

Max

Default

Description

Flow.Nominal³

0

100

40

Sets the nominal carrier gas flow [ml/min]

Flow.Value³

0

100

N/a

Indicates the actual carrier gas flow [ml/min] (read-only).

Pressure.Nominal³

0

60

15

Sets the nominal carrier gas pressure [psi].

Pressure.Value³

0

60

N/a

Indicates the actual carrier gas pressure [psi] (read-only).

TempCtrl

Off

On

On

Turns the injector heater on or off.

Temperature.Nominal

²

²

²

Indicates the nominal temperature of the injector heater.

Temperature.UpperLimit

²

²

²

Sets the maximum temperature of the injector heater.

Temperature.Value

-99°C

420°C

50°C

Indicates the actual temperature of the injector heater (read-only).

² The values depend on the device settings.

³ These properties are available only if you have selected the Injector Flow Control or Injector Pressure Control option on the Components tab page in the Server Configuration program.

 

Valve (available only for the Varian 3600 GC)

 

Property

Min

Max

Default

Description

Duration

0.00

59999.90

N/a

When set, the relay switches after the indicated time [sec].

State

Off

On

Off

Indicates and sets the valve's state.

 

Command

Description

Off

Turns the valve off.

On

Turns the valve on.

 

Also, refer to  Varian 3400 3600 GCs: Different Names in Firmware and Chromeleon.

For an overview of the Varian 3400 GC, refer to Hardware Installation  Varian 3400 GC in the Administrator Help section.

For an overview of the Varian 3600 GC, refer to Hardware Installation  Varian 3600 GC in the Administrator Help section.