Commands and Tips for Third-Party Devices
Agilent 6890/6850 GCs: TCD (Thermal Conductivity Detector)

The following commands and properties are available (please note that the display Filter level determines which commands and properties are displayed):

 

Property

Min.

Max.

Default

Description

Filament

Off

On

1

Turns the filament on and off.

MakeupGasType
(FID Detectors with EPC option)

Nitrogen, Hydrogen, Helium, Argon Methane, Unknown)

² (Demo
mode: Nitrogen)

Makeup gas type. In this form, the property is available only for FID detectors with EPC option, see the Detector configuration tab page.

Polarity

Positive

Negative

² (Demo
mode: Positive)

Set to Negative to invert negative peaks. Set to Positive for normal peaks.

RefFlow
(Detectors without EPC option)

0.0 ml/min

100.0
ml/min

² (Demo
mode:
0.0 ml/min)

Reference gas flow. In this form, the property is available only for detectors without EPC option, see the Detector configuration tab page.

RefFlow
(Detectors with EPC option)

-

-

-

Properties related to the reference gas flow.

 Ref.Flow.
Nominal

0.0 ml/min

100.0
ml/min in increments of 1

0.0 ml/min

Specifies the target reference gas flow.

 RefFlow.Value

0.0 ml/min

100.0
ml/min

-

Current reference gas flow (read-only).

RefFlowCtrl
(Detectors with EPC option)

Off

On

² (Demo
mode: On)

Turns the pneumatics on and off. In this form, the property is available only for detectors with EPC option, see the Detector configuration tab page.

 

 Note:

² When connecting, Chromeleon reads the value from the instrument and accepts it as default.

 

The Administrator Help section provides installation instructions for the 6890 and 6850 GCs; refer to Hardware Installation:

 Agilent 6890 GC: Installation

 Agilent 6850 GC: Installation