Hach Sigma 950, Инструкция по эксплуатации инструмента

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16
Introduction
Figure 1 950 Flow Meter Front Panel
Item # Description Function
1 Menu bar
The menu bar appears in a black band on the top edge of the display. The upper left corner of the
menu bar shows the time and date. The upper right corner shows the name of the current menu.
2 Display
The 950 Flow Meter liquid crystal display (LCD) works in conjunction with the four soft keys as a guide
through all programming steps. The display also provides other useful information as described below.
3 Soft keys
The soft keys are the blank, white keys located to the left and right of the display. The function of each
key is according to the appearance of the display. If no function is shown for a specific key, that key is
not currently needed. The soft key labels appear on the display and point (with a straight line) to the
proper soft key to push for that action.
In some cases during a programming step you will be asked to pick an item from a list. The soft keys
on the right side of the display will change to display “up” and “down” arrows. This allows you to scroll
up and down the list of choices. When the desired choice is highlighted, press the SELECT soft key to
choose that item.
4 Status bar
The appearance of the status bar changes depending upon the function being performed. The lower
left corner of the status bar indicates whether a program is Complete, Running, Halted, or Ready To
Start. It will disappear if it is not needed during a programming step. The lower right corner displays
system alarm conditions, such as low memory battery, clogged bubbler line, etc. For a list of possible
alarms see
Alarm Relays on page 68 .
The status bar also lists valid choices when entering certain programming information. For example,
when selecting level measurement units in the Level Units menu, the status bar indicates the valid
choices: cm, ft, in., or m.
5
Humidity
Indicator
The Internal Humidity Indicator changes from blue to pink when the humidity inside the case exceeds
60 percent. An internal desiccant module absorbs any humidity that may have been trapped in the
case during final assembly. Under normal operating conditions, this desiccant provides long-term
protection against condensed moisture inside the case.
Replace the internal desiccant module only if the indicator turns pink. (See
Replacing the Internal
Desiccant Module on page 78 ).