Servomex NanoTrace DF-760E, Инструкция по эксплуатации

Страница: 36 / 182

32 DF-760E Installation, Start Up and Shut Down
4.2.6 Purifier Installation
Shipping regulations require that the zero gas purifier be packaged separate from the
analyzer. As a result, the purifier must be installed by the user but this should be done after
the analyzer is operational. See page 129 for instructions.
4.2.7 Download System Data
The final step of the installation, after a couple days of dry down, should be to download
the diagnostics (see section 7.7.11) and send them by e-mail to Servomex for review. This
will allow the factory to confirm that the analyzer is working properly by comparison with
data stored at the time of shipment, and in addition will set a baseline for comparison with
future downloads, if any.
4.3
Analyzer Shut Down Or Disconnection
In order to minimize the time required for the analyzer to re-achieve a zero baseline on
start up, the following steps should be followed when shutting the analyzer down.
Short Term Shut Down - A short-term shut down, for example to move and restart the
analyzer, can be accomplished by simply shutting off the power switch behind the front
door. This action initiates the standard isolation process and computer shut down which
takes approximately 40 seconds.
Long Term Shut Down - From the Main Menu go to System, and select Isolate
Analyzer. A routine automatically starts that closes the downstream valve and allows
pressure to build in the moisture cell after which an upstream valve closes as well. In
addition the oxygen sensor is isolated. 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.
NOTE: See the section on Power up Default on page 109 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.
Disconnection and Moving
–
Before disconnecting and moving the analyzer the
power cord should be disconnected from the AC receptacle.