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FAQ What is the cause of frequent failures of base DPM boards?

QUESTION:   What is the cause of frequent failures of base DPM boards? ANSWER:  ...

04/22/2005
ID: 21466377
(0)
FAQ Which Maxum hardware to replace on daily resets?

QUESTION:   Which Maxum hardware to replace on daily resets? ANSWER:  ...

04/22/2005
ID: 21466700
(0)
FAQ MMI Version 4 - What's possible, what's not?

FRAGE:   MMI Version 4 - What's possible, what's not? ANTWORT:  ...

04/21/2005
ID: 21460710
(0)
FAQ How does the cycle clock work?

QUESTION:   How does the cycle clock work? ANSWER:  The cycle clock is not kept by the Syscon. The Syscon receives MethodStatus messages every second that contain the current value of the cycle clock on the SNE. This means that depending on the load on the system, these message may not be updated on the MMI every second. No processing should be dependent on the apparent (on the Syscon) cycle clock being accurate. ...

04/14/2005
ID: 19785184
(0)
FAQ Why is the MMI no longer adjustable?

FRAGE:   Why is the MMI no longer adjustable? ANTWORT:  ...

04/14/2005
ID: 21412749
(0)
FAQ How to log data files in EZChrom

QUESTION:   How to log data files in EZChrom ANSWER:  In order to log data files do the following: Open the instrument in EZChrom. From the Data drop-down menu select Log Stream. In the row for the stream you want to log, click in the Logging column and select Always from the drop-down list. Select the desired format from the Format drop-down list (put mouse pointer over column to see an example). Use the default path under Log D ...

04/14/2005
ID: 19869985
(0)
FAQ Why do I need to save to flash before making a backup of the database?

QUESTION:   Why do I need to save to flash before making a backup of the database? ANSWER:  When you backup the database and make an .amd file, it comes from the copy of the database that is in flash. On the other hand, when you make a database unload to a text file, it comes out of warm memory, not needing a save to flash. ...

04/14/2005
ID: 19783090
(0)
FAQ Explain stream sequence, next stream control

QUESTION:   Explain stream sequence, next stream control ANSWER:  Each application has a set of sequences - by default, a process sequence and default calibration sequence. Sequences are more than stream sequences, designating stream, method, and calibration run type in a certain order. Sequences are defined in EZChrom and can’t be modified elsewhere. As the Maxum runs an application, it cycles through the “steps” in the active sequence. As it runs, each s ...

04/14/2005
ID: 19870533
(0)
FAQ How to do a temperature check before injection?

QUESTION:   How to do a temperature check before injection? ANSWER:  To enable this function: In System Manager, in the Application Tables, double click on the App_tempctl table. Scroll out to the right. Enable the 'equilibrate' field. Note the 'waitdelta' field is set to 2, by default. This means that the analyzer oven temperature must be within 2 degrees of setpoint, or the analyzer will stay in the 'wait' state. Set the 'maxwa ...

04/14/2005
ID: 19868331
(0)
FAQ How to improve SYSCON system performance?

QUESTION:   How to improve SYSCON system performance? ANSWER:  Maxum Analog and Digital Inputs that are left enabled and unused can take up valuable Syscon processor bandwidth. For system performance improvement, we recommend disabling unused Analog or Digital Inputs. Do not disable Analog or Digital Inputs used in temperature controller and pressure controller measurements. Any Analog or Digital Inputs that have limits defined or those that are use in oth ...

04/14/2005
ID: 19782754
(0)
FAQ How can an application be required to wait until temperature or pressure is reached?

QUESTION:   How can an application be required to wait until temperature or pressure is reached? ANSWER:  Causing the application to pause and keep the cycle from beginning is controlled by a temperature or pressure program entered into EZChrom. This became available in Maxum 3.0 and is independent of the temperature controller version. The app_tempctl and app_pressctl tables contain attributes equilibrate, maxwait, and maxdelta. ...

04/14/2005
ID: 19870205
(0)
FAQ Why Maxum’s MMI display goes blank?

QUESTION:   Why Maxum’s MMI display goes blank? ANSWER:  This only effects version of MMI with the metallic keyboard. ...

04/14/2005
ID: 19786053
(0)
FAQ What happens at the start of a process cycle?

QUESTION:   What happens at the start of a process cycle? ANSWER:  The Syscon determines what stream and method to run by looking at the active sequence, figuring out which stream is flowing(the one with the F). The Syscon moves the status to CURR, moves the STEP to the next one to flow, waits for stream purge or temp/pressure initial setting. If the method is marked for download, the Syscon sends the method to the SNE using the MethodWrite message. If the ...

04/14/2005
ID: 19785088
(0)
FAQ How do calibration and validation sequences differ from process sequences?

QUESTION:   Calibration sequences and validation sequences are different in that when they are set active, they always start with the first step. At the end of the sequence, a validation and autocalibration always returns to the prior active sequence. A manual calibration remains in the calibration sequence until told to do something else. During calibration, additional calibration information is sent from the SNE and stored in the calibration tables – calibration_level a ...

04/14/2005
ID: 19870309
(0)
FAQ What happens at the end of a process cycle?

QUESTION:   What happens at the end of a process cycle? ANSWER:  As the SNE transfers results to the Syscon with the MethodWrite message – peak and group results and chroms, it stores them first in the chromatogram and ezchrom_result tables and then in the results table(cycle_runtime and buffered value). When the SNE has completed its processing, currently at the end of the cycle, it sends a ResultsComplete message. Now the Syscon is in control. It starts ...

04/14/2005
ID: 19785289
(0)
FAQ How do SNE and SYSCON communicate?

QUESTION:   How do SNE and SYSCON communicate? ANSWER:  The SNE and Syscon communicate using TCP messages. TCP is a transfer protocol – it defines a means of reliable transfer of information via an agreed upon connection. The Syscon’s TCP server accepts a request for connection from the SNE and establishes a connection, over which messages may be exchanged. Both the SNE and Syscon have software that processes the messages. In addition to operational message ...

10/29/2004
ID: 19784730
(0)
FAQ Maxum II Methanator Purge and Oxidation

QUESTION:   Maxum II Methanator Purge and Oxidation ANSWER:  The Maxum II Methanator is purged, with the EC purge system, to meet the safety temperature rating of the analyzer. As stated on the tag on the Maxum II with a Methanator, the analyzer shall not be opened unless the area is known to be free of flammable material or all devices in the analyzer have been turned off for at least 30 minutes. This allows the heater in the methanator to cool down to a ...

10/29/2004
ID: 19784729
(0)
 
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