Parts required

Static mixer as required for the mixing system (see Available Mixing Systems).

Tools and additional items required

  • Depending on the fitting connection on the capillaries

    • Viper capillary: Viper knurl (usually present on the capillary)

    • Conventional capillary (non-Viper): Open-end wrench, size 1/4"

  • Solvent suitable for purging

  • Screwdriver, Torx T10 (required only for static mixers with a volume of 750 µL or 1500 µL)

Preparations

  1. If not yet done: Remove the mixing system with which the pump is shipped (see Removing the Mixing System).

  1. Only required if you want to install a static mixer with a volume of 750 µL or 1500 µL

    These mixers require a different mounting bracket. Install the new mounting bracket. The mounting bracket is included in the mixer shipment.

Installing the New Mounting Bracket

Required only for static mixers with a volume of 750 µL or 1500 µL

  1. Remove the mounting bracket that is installed in the pump. Mind the orientation of the bracket. The orientation is important for the new bracket.

    Binary pump: Keep the spacer sleeves. You will need them when installing the new mounting bracket.

Removing the mounting bracket
Figure: Removing the mounting bracket

No.

Description

1

Mounting holes for mounting bracket

2

With binary pump only: spacer sleeves

3

Mounting bracket

4

Mounting screws (Torx)

  1. Using the screws shipped with the mounting bracket, attach the new bracket inside the pump (same position and orientation as the one you removed).

    Binary pump: Reinsert the spacer sleeves.

Installing the mounting bracket
Figure: Installing the mounting bracket

No.

Description

1

Mounting holes for mounting bracket

2

With binary pump only: spacer sleeves

3

Mounting bracket

4

Mounting screws (Torx)

Follow these steps

NOTICE

Turning the static mixer in the mounting bracket when loosening or tightening capillaries can damage the mounting bracket.

To prevent the mixer from turning in the bracket, hold the mixer with an open-end wrench when you loosen or tighten capillaries on the mixer.

  1. Connect the capillary mixer to the static mixer.

    Mind the direction of flow through the static mixer and capillary mixer (indicated by the arrow on the mixer).

  2. Insert the assembly of static mixer and capillary mixer into the pump.

  3. Insert the static mixer into the mounting bracket.

  4. Connect the capillary mixer on the purge/sensor unit.

  5. On the static mixer outlet, connect the capillary to the autosampler injection valve.

  1. In the Chromeleon software, set the StaticMixer property to the value indicated on the static mixer. If the property is not set to the correct value, the leak tests may not provide reliable results.

  2. Apply the flow rate of your application and have the pump deliver for a short time.

  3. Inspect the flow connections on the mixer for indications of leakage before resuming operation.

  4. In the Chromeleon software, consider updating the Predictive Performance information for the static mixer (MixerChanged command).

When operating the pump, observe the following

  • Operating the pump with a mixing system with a volume lower than the volume installed in the pump upon shipment reduces the gradient delay volume but increases the ripple.

  • Operating the pump with a mixing system with a volume higher than the volume installed in the pump upon shipment reduces the ripple but increases the gradient delay volume.

  • The maintenance procedures are the same as for the mixing system with which the pump was shipped (see Mixing System).