Dip Switches; Date And Time; Plot Graphs; Modify Plot Scales - Liebert Himod Operation & Maintenance Manual

3.8.4

DIP Switches

The DIP switch settings can be reviewed from the display panel. Changing the DIP switches requires
opening the front panel for access to the DIP switches on the microprocessor control board.
NOTE
Power MUST be cycled off, then on, from the unit disconnect switch for the control system to
update the DIP switch settings (except for switch 8).
These selections should match options installed on your unit and should not need to change during
normal operation. Switches 1 through 7 are self explanatory. DIP switch 8, not shown in the table,
enables the password feature when set to ON and disables the password feature if set to OFF.
Table 11 Setting options
Number
1 All
2 Electric Reheat
3 All
4 No GLYCOOL
5 No Dual Cooling
6 All
7 Challenger 3000
3.9

Date and Time

The current date and time is available through the display. This feature allows the date and time to
be read or changed and is accessed by selecting "DATE AND TIME" from the Main Menu. The "DATE
AND TIME" is used by the control for recording the Alarm History and plotting graphs.
NOTE
The clock uses the 24 hour system (For example: 17:00 would be 5:00 PM).
The date and time are battery backed-up.
3.10

Plot Graphs

Selecting PLOT GRAPHS will step to the following menu:
• TEMPERATURE PLOT
• HUMIDITY PLOT
• ANALOG SENSOR #1 PLOT
• ANALOG SENSOR #2 PLOT
• ANALOG SENSOR #3 PLOT
• ANALOG SENSOR #4 PLOT

• MODIFY PLOT SCALES

Six different data types are recorded for graphing: temperature, humidity, and four user defined ana-
log inputs. Each data type can be viewed over three different time scales and two different resolu-
tions. The three time scales are 90 minutes, 8 hours, and 24 hours. The two resolutions are minimum
and maximum. With minimum resolution selected, the full scale of the sensor is displayed. In other
words, the largest and smallest possible sensor readings are shown. Maximum resolution shows a
range which covers two fifths of the full scale sensor range.
3.10.1 Modify Plot Scales
The MODIFY PLOT SCALES menu item adjusts the layout of the graph. This setup screen selects the
time scale and resolution. It also adjusts the center of the graph for a maximum resolution graph.
The time scale and resolution can also be changed while the graph is displayed. The DOWN arrow key
changes the time scale from 90 minutes, to 8 hours, to 24 hours. The UP arrow key toggles the display
between maximum and minimum resolution.
24 Operation with Advanced Microprocessor with Graphics Control
Off
Not Used
Not Used
Not Used
GLYCOOL
Dual Cooling
Not Used
Himod
On