Instrument Configuration View for Dual Needle

Figure: Configuration view for alternating dual needle with two 20 µL Sample Loops

Figure: Configuration view for dual needle with non-identical flow paths (e.g a 20 µL and a 500 µL Sample Loop)

NOTE

In this view it is not possible to change the online configuration of the sample loops or the seat capillaries.

Shows the currently installed devices and status.

**Table:** Instrument configuration view for dual needle
Communication	Device name: Multisampler Type ID: G7167A/B Serial number: DEBAR00101 Firmware revision: D.06.75 Connection settings: LAN connection or hostname
Options	Metering: G4267-60043 100 µL Analytical Head NOTE: For dual needle only the 100 µL metering device is available. For single needle you can use 40 µL, 100 µL or 900 µL metering devices.
Left Needle installed	This check box is marked to indicate that your system is equipped with a dual-needle option. When the check box is marked, the Left Needle section is enabled. NOTE: If the Left Needle parameters are equivalent to the Right Needle parameters, then Alternating Needle Usage is possible, which increases sampling efficiency. NOTE: If dual-needle option is installed, the system will use multi-load instead of multi-draw for larger sample volumes. For multi-wash and an installed dual-needle option, multi-draw is not available.
Left Needle	This section is enabled only when the Left Needle installed check box is marked.
Loop	Shows the currently installed loop capillary. NOTE: It is mandatory that the configuration of the dual-needle system, especially sample loops, match to the installed hardware to avoid damage to the system.
Seat	Shows the currently installed seat capillary.
Right Needle	This section is always enabled.
Loop	Shows the currently installed loop capillary. NOTE: For the dual-needle setup, only the correct dual-needle sample loops must be configured and used, for instance G4267-60311 (Sample Loop 20 µL right Dual needle). These sample loops are manufactured especially for dual-needle systems.
Seat	Shows the currently installed seat capillary. The needle seat capillary volume is used for the Automatic Delay Volume Reduction option and ISET.
Thermostat installed	This check box is marked to show that a sample thermostat is installed.
Mode	Select Constant temperature mode to set the temperature using the Thermostat section of the Multisampler Control parameters. Use this mode to store samples at a constant temperature across multiple runs. This is the default mode, which is recommended in most cases. Select Variable temperature mode to set the temperature using the Thermostat section of the Advanced Method Setup parameters. In this mode, the temperature can be varied from run to run.
Multi-wash installed	This check box is marked to show that the multi-wash option is installed, and the Multi-wash option in the Needle Wash section of the Method parameters is available (Not available for dual needle).
Reference vial rack	Click the down-arrow and select the reference vial rack that is installed in your multisampler from the drop-down list.
Bypass capillary	Click the down arrow and select where the bypass capillary is installed (if any). When installed, the bypass capillary allows the configuration of a minimized injection path to reduce flush times and allows the dual-needle configuration to be used in single-path mode. In this case, the needle where the bypass is installed is no longer available for injection. NOTE: Bypass capillary either installed left or right: only the listed capillary (p/n 5500-1238 (Capillary ST 0.12 mm x 105 mm SL/SL)) can be used as bypass capillary.
Define Sample Containers	Displays the Define and edit Wellplates configuration dialog box, which contains a list of standard preconfigured wellplates plus any custom wellplates that have been added.

NOTE

For the dual-needle setup, only the correct hardware must be configured and used, for instance the 5500-1238 (Capillary ST 0.12 mm x 105 mm SL/SL) or G4267-60311 (Sample Loop 20 µL right Dual needle) .

21-Jun-2025