Waters 2998, Обзор и руководство по обслуживанию

Страница: 41 / 94

December 5, 2017, 715004753 Rev. B
Page 41
Note:
If the detector fails to stabilize, see Chapter 4 .
2.8.2 Monitoring LEDs
Light-emitting diodes on the detector indicate its state of functioning.
2.8.2.1 Power LED
The power LED, on the 2998 PDA detector’s front door, indicates when the instrument is
powered-on or powered-off. It is steady green when the instrument is working properly.
2.8.2.2 Lamp LED
The lamp LED, to the left of the power LED, indicates the lamp status.
The following table identifies each LED mode with its corresponding detector lamp state.
2.8.3 Shutting down the detector
To shut down the detector:
1. Set the solvent delivery system or pump to deliver 10 mL of HPLC-grade water, if the mobile
phase contains buffers, or 10 mL of degassed methanol, if the mobile phase does not
contain buffers.
2. Power-off the detector.
2.9 Using a cuvette
The 2998 PDA detector cuvette option allows for ease of use in:
• Sample handling
Warning:
To avoid electric shock, do not touch the lamp connector if the lamp LED is
flashing red. Power-off and unplug the detector before touching the lamp connector.
Table 2–8: 2998 PDA detector LED indications
LED mode and color Description
Unlit Indicates the detector lamp is extinguished.
Constant green Indicates the detector lamp is ignited.
Flashing green Indicates the detector is initializing or verifying calibration.
Flashing red Indicates that an error stopped the detector. Refer to the
console for information regarding the error.
Constant red Indicates a detector failure that prevents further operation.
Power-off the detector, and then power-on. If the LED is still
steady red, report the problem to Waters Technical Service.