Safe Operation; Maintenance Panel Functional Description - Siemens Maxum II Manual

Process gas chromatograph

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Safe Operation

5.1

The software and parameter settings in the Maxum II chromatograph system can be accessed

using the PC-based System Manager software and also via a user access display panel that

is mounted on the front door of the Maxum II electronics enclosure. Two types of display panel

exist, both of which can be used to perform the same user functions. The newest version is

the Color Touchscreen display, which is described in section 5-3. The other, described in this

section (figure 5-1), is the Maintenance Panel (which is also sometimes called a Human

Machine Interface, or HMI). Both are shown below for comparison.

The Maintenance Panel consists of an LCD screen, numeric keypad, status LEDs, and various

function keys. Most maintenance and operation functions for the Maxum II can be performed

using the Maintenance Panel.

The Maintenance Panel is the primary means for a user located at the analyzer site to obtain

alarm information and purge status of the Maxum II. The Maintenance Panel can be operated

whenever power is applied to the Maxum II, even if the installation area contains fire hazards.

Of particular importance are the "Purge" and "Power" LEDs located in the top right corner of

the panel. If an APU is not installed, the "Purge" LED flashes when purge pressure is lost. The

"Power" LED is lit at all times when power is applied to the analyzer. Note that the "Fault" and

"Warning" LEDs are related to the trouble reporting systems of the Maxum II but are not

applicable to the safety systems.

Use of the Maintenance Panel for maintenance and operation functions is covered in the

Maxum II Maintenance Manual (Siemens part number 2000596-001).

Figure 5-1

Maintenance Panels - Color Touchscreen (left) and legacy HMI (right)

Explosion Protection Safety Standards

Manual, August 2017, A5E02220442001 Rev 8

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