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Maxum II Shutdown, Restart, and Cleaning Procedures

Introduction

The Maxum II is designed to automatically recover to full operation after a power fail. This process will

take an amount of time depending upon the duration of power loss. It may be a few cycles to several

cycles, depending upon cycle length, oven temperature, and a number of other factors. If the user wants

to remove power for any reason, this can be done as simply as removing the power and then restoring it

when desired. To minimize the loss of utilities and restart time or for any maintenance in the Maxum II

oven, the following shutdown and restart procedure is recommended.

Shutdown Procedure

The following procedure is recommended for manual shutdown of the Maxum II, especially if the

shutdown period is for any significant length of time. Read the entire procedure and warning/caution

before proceeding.

WARNING Need to ensure that adequate timing (per the warning tags) is allowed before

opening any enclosure that contains heated items.

CAUTION Heated items may be too hot to touch for some internal surfaces.

 Place all applications in Hold - wait for them to complete the cycle.

 Save the database to the Workstation and perform a Save to Flash to ensure recovery to the

same state.

 Remove power from analyzer.

 Shut off oven air immediately if not going to work on oven to maintain oven temperature longer. If

going to work on the oven, then delay for 10 minutes before turning off air (the delay for air flow

removal provides time for cooling of the oven if air bath - airless will take considerably longer).

 Shut off the gas utility flows (start with sample flow - turn off valve gas last to minimize loss of

other utilities).

Restart Procedure

The following procedure is recommended to restart the Maxum II following the shutdown procedure noted

above. Note that the GC will attempt to restart automatically on power restore if it was in “RUN” when the

power was removed. Alarms will be generated for some number of cycles as the oven stabilizes and the

GC recovers back to normal operating conditions.

 Turn on valve gas.

 Turn on other gas utilities including sample.

 Turn on oven air.

 Power up analyzer. Allow time for the oven to come up to temperature (timing varies with oven

temperature setting and oven type).

 Clear alarms and place applications in Run.

Cleaning Procedure

The Maxum II has minimal requirements for cleaning. The user may take a damp cloth and wipe down

the outside of the unit when it has a buildup of dust or other air borne contaminants.

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Siemens GC..M.. Installationshandbuch Seite 41