The keypad inside the device allows you to perform certain functions directly from the device. When you press a button, a short beep confirms that the function is performed.
When the device is connected in the Chromeleon software, some functions may not be available from the keypad (see further down in this section).
STATUS
The STATUS LED provides a quick visual check of the operational status of the device.
When the doors are closed, the LED bar on the front side indicates the operational status.
For status details, see Status Indicators.
MUTE ALARM
Beeping alerts you when the device detects a problem, for example, leakage. To turn off the beep for the current alarm, press this button. Eliminate the source for the alarm within 10 minutes. Otherwise, beeping starts again. If the device detects a different problem, beeping alerts you again immediately.
SELECT
Binary pump and dual pump
Pressing the button selects the pump head for you which you can perform a DOCK or PURGE function from the keypad. The LEDs next to the button indicate the selection:
LED | Description |
|---|---|
LED L = green | Left pump head selected |
LED R = green | Right pump head selected |
Before performing a DOCK or PURGE function from the keypad, select the pump head for which you want to perform the action.
Isocratic pump and quaternary pump
The button is disabled.
DOCK
Pressing the button moves the pistons of the selected pump head to the appropriate position for maintenance procedures, such as pump head or piston replacement, and undocks the pistons.
When undocking is complete, the LED next to the FLOW button starts flashing green for the selected pump head. The LED continues flashing while no pistons are docked. Pressing the button again docks the pistons. Docking is complete when the LED stops flashing green.
Note the following:
To avoid damage to the pump, remove or install the pump heads only while the pistons are undocked (LED is flashing).
Before you press the button to undock the pistons, open the purge valve by turning the valve knob counterclockwise.
When docking is complete, close the purge valve.
PURGE
Pressing the button starts a purge cycle. Pressing the button while a purge cycle is running stops the cycle. See Purging the Pump.
FLOW
Pressing the button starts or stops the flow, considering the selected flow rate, solvent composition, and flow acceleration/deceleration.
The LEDs next to the button indicate the following:
LED | Description |
|---|---|
Off (dark) | The pump flow is off or zero. |
Green | The pump head is delivering. |
Green, flashing | The pistons are undocked. |
When the Device is Connected in the Chromeleon Software
The button functionality is as follows when the device is connected in the Chromeleon software:
No injection or sequence is running:
All functions are available from the keypad.
An injection or sequence is running:
The MUTE ALARM function remains available from the keypad, allowing you to turn off the beep for the current alarm.