Omega DPS3100 - Manual (Page 7)

Page 6
setpoint, difference between any two selected channels or just run as a timer. In the timer mode the unit keeps track of
process run time with crystal controlled accuracy. Elapsed Time display format is 'HH.MM.SS' for hours, minutes, and
seconds. The desired display mode is selected during SYS SETUP ---- (for details refer to the SYS CONFIGURATION
section).
Table 2. Display Modes
MODE
FUNCTION PERFORMED
1) Elapsed time
Unit displays elapsed time since power up or last time reset.
2) Scan
All active channels are automatically scanned.
Channels that are turned off are not scanned or displayed.
3) High Channel
The unit will compare all active channels against each other and
display the one that has the highest process reading.
4) Low Channel
The unit will compare all active channels against each other and
display the one that has the lowest process reading.
5) Deviation
The unit scans all active channels and displays the deviation of
process variable from a pre-programmed setpoint.
6) Channel Differential
The unit continuously displays the difference of process between
any two selected channels.
The following paragraphs give a detailed description and operation of various modes.
Elapsed Time Mode
DPS3000 Series can be programmed to run as timer. In this mode the unit will
indicate elapsed time in hours, minutes and seconds. The display format is
'HH.MM.SS'. This mode is selected during SYS Setup by opting for 'ELPSD
t'. The elapsed time is the time passed since the unit was turned on or when the
time was last reset. To reset the time, first push the TIME key and while
keeping it pressed, push the RESET key. The display will show 'rESEt' and on
release of the RESET key, the display will reset to '00.00.00' and begin timing.
The elapsed time can also be momentarily displayed while the unit is operating
in any other display mode. This is done by pushing the TIME key once. The
unit will first display the word 'ELPSd t' followed by the elapsed time. This will stay in the display window for a brief
period and then the unit will revert to the normal display mode.
Scan Mode
When setup for scan mode, individual channels are displayed for a programmed
period of time. At the end of that time period the, display automatically switches
to the next channel. For ease of reading, the display first shows the channel
number (Format: 'CHANEL 1') and then the process variable along with the
programmed three digit engineering units e.g. 23.45 PSI.