Delta NANOTRACE DF-745 Instruction Manual download pdf (Page 26)

22 DF-745 Installation, Start Up and Shut Down

valve closes as well. Throughout this process a message appears over the display instructing

the user to wait 40 seconds. Once complete, the message disappears and the user may shut

the power off with the switch behind the front door that initiates the computer shut down

sequence that takes an additional 40 seconds.

Additional long-term isolation security can be achieved by closing the valve on the

rotameter on the rear of the instrument as well as completely closing the sample inlet

regulator.

If the analyzer is being disconnected from gas, be sure to tightly cap all gas connections.

On analyzers that have no gas control valves:

1. Remove the vacuum source.

2. Wait a few minutes to allow positive pressure to build in the moisture cell and

monitor the pressure on the Main Display.

3. Be sure to tightly cap all connections.

NOTE: See the section on Power up Default on page 63 for setting user selectable

preferences at the time of power up.

Loss of power will result in automatic valve closure and the following restoration of power

will result in the “Scan Disk” function occurring before system start-up.

.010 ORIFICE

80 psi IN

TO CREATE VACUUM

MOISTURE

SAMPLE VENT

ASPIRATOR WITH BUILT

IN VACUUM CONTROL

NEEDLE VALVE

MOISTURE SENSOR OUTLET

H O

PROCESS INLET

REAR PANEL

FLOW METER

(FRONT)

Figure 9: Block Diagram of Gas Flow Path and Aspriator

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Delta NANOTRACE DF-745 Instruction Manual Page 26