a)The first one is a momentary display in which the deviation is indicated for a short time. Following this brief display time, the unit reverts to its normal mode of operation (scanning, differential, timer etc.). To achieve this, first select the channel whose setpoint deviation is desired. This is done by
pushing the CH. SEL key. Next, push the RATE key twice. The first push displays the rate/minute value. The second push will display the deviation value. Before showing the deviation, the display will read 'CH2 - SP' ( for CHannel 2 SetPoint).
b)The second method of displaying deviation is by selecting the
'dSP dEN' option when programming the Display Option during the SYS Setup. If this method is selected, the display will scan through all the active channels and display their deviation. The display format is 'd2 1234' (d stands for deviation).
The unit can also be put on HOLD at any channel by pushing the SCN/HLD key. If any other channel's deviation is desired, it may be obtained by pushing the CH. SEL key. If an attempt is made to hold the display on a channel that has been turned off, then the unit indicates this by displaying 'CHx OFF' (x=channel #). DPS3000 Series will keep track of all other parameters while programmed for this mode (i.e. limits, peaks, rate, process value, channel differential etc). All of these may be displayed by pushing the respective keys.
Difference Mode
In this mode the system continuously displays the difference of process variable between any two selected channels. The two active channels are selected during SYS Setup mode. To remind the operator of the current display mode and also the two channels, the display flashes the channel numbers every few seconds (e.g. 'CH1 - CH2' for displaying difference between channel #1 and channel #2).
If the unit is not programmed for difference mode, the differential between any two of the seven channels can be briefly displayed by pressing the DIFF key.
The procedure for doing so is to first select the channel whose differential with another channel is desired. This is done by pushing CH SEL key. Each push on this key will display the selected channel in the format 'CHANEL x'(x=channel #). When the desired channel has been selected, press the DIFF key three times. The first push will display the rate of process change on that channel. The second push will show the process deviation from the programmed setpoint. The third push will flash a display of the form 'CH1 - CH2' and then a differential value. Additional pushes on DIFF key will sequence thru the channels and will be indicated as below:
CH1 - CH3, CH1 - CH4, CH1 - CH5, CH1 - CH6, CH1 - CH7, CH1 - SP
SETUP
Setup mode provides a means to customize the monitor to suit a particular application. It allows programming such parameters as temperature units, limits, display mode, relay deadband, etc.
SETUP mode has 2 sections:
a)SYS setup section to set system parameters
b)CH setup section to set Channel parameters for each channel.
To get into SETUP mode, push the SETUP key twice. The first push displays elapsed time and the second push brings the unit into the SETUP mode. SETUP mode is indicated by 'SETUP' in the display window (the SETUP LED indicator will also be illuminated) followed by 'ENtR PC' (for ENteR PassCode). The passcode feature has been provided to keep unauthorized personnel from changing any parameters. Each of the five keys on the front panel are labeled with a number in the lower right corner. The
four digit combination of these numbers. Enter the
DPS3000 Series is 3254.
Page 8