How should I start and stop nitrogen gas flow into the Waters Positive Pressure-96 Processor (186006961)? - WKB230473

OBJECTIVE or GOAL

Initiate gas flow into the Waters Positive Pressure-96 Processor and then stop gas flow.

ENVIRONMENT

• Solid-phase extraction (SPE)
• Positive Pressure-96 Processor
• Nitrogen flow

PROCEDURE

To begin using the unit from zero gas flow:

1. Connect the blue tube to the back of the unit.
2. Connect the blue tube to a pressure regulator that is connected to an oil-free nitrogen gas source.
3. Set the pressure regulator to "0" before opening the valve on the gas source. This prevents a pressure spike leading to the unit.
4. Ensure that the "SPE Flow Rate selector" switch on the front of the unit is set to the "Off" position.
5. Slowly open the valve on the gas source while keeping the pressure regulator set to "0".
6. Slowly open the pressure regulator valve until the desired pressure is reached. Tip: The optimum source pressure is 80 psig, the minimum pressure is 60 psig, and the maximum pressure is 100 psig.
7. Follow instructions in the User Guide for controlling flow with the "Low Flow Regulator" and "Max Flow Regulator".

To stop using the unit and turn off gas flow:

Follow the previous steps in reverse.

ADDITIONAL INFORMATION

Related links:
Waters Positive Pressure-96 Processor Web Page
Waters Positive pressure-96 Processor Brochure   (p/n 186006961)(lit code 720003453en)
Waters Positive pressure-96 Processor Operator’s Guide (p/n 186006961)(lit code 715002662EN)
Waters Positive pressure-96 Processor Demo Video:  (Part# 186006961) 


Images:
Solvent Selector Switch set to "Off"

Regulator:

Note:
Waters does not recommend disconnecting the tube from this unit on a regular basis. This can cause the tube to wear out. 
Also: The pressure regulator, if turned to "0" when you turn on your gas, will prevent any pressure spikes from reaching this unit.