Omega Engineering DP3600 사용자 설명서

 

7

 
This step comes after programming Limit 3 and is indicated by the message ‘LT3 Pr’ (if Limit 3 is setup as 
Process limit) or ‘LT3 dEN’ (if Limit 3 is setup as deviation limit). Alternate selection can be made by 
pushing ^v key. Push SETUP key after making the selection. 
 

 
As Process Limit: 
 
If Limit 4, in the above step, was configured as a Process limit, then the message displayed on entering this 
mode will be ‘PrG  Lt4’. This will be followed by displaying of current value of Limit 4 . Use <NXT> key 
to move flashing to the next digit and ^v key to increment/decrement the value of the flashing digit. 
 
As Deviation Limit: 
 
If Limit 4, in the above step, was configured as a Deviation limit, then the message displayed on entering 
this mode will be ‘dEVN   Lt’. This will be followed by displaying of current value of Limit 4 . Use 
<NXT> key to move flashing to the next digit and ^v key to increment/decrement the flashing digit. 
 

 
This mode lets you enter values for timer 1 and 2. The display will read ‘TR1  LT’ (for timer 1 limit) and 
‘TR2  LT’ (for timer 2 limit) followed by current programmed value of each of the timers. To change the 
value use <NXT> key in conjunction with the ^v key. Once done, push the SETUP key to go to the 
following parameter. 
 

 
The parameter programmed after timers is limit deadband. The display will first read "DEAD  BD" and 
then show the value of previously programmed dead-band. To change the value of flashing digit, press ^v 
key. To move flashing digit, push <NXT> key. After programming the desired value of "dead-band" push 
‘SETUP’ key to get to the next function. 
 

 
Following relay deadband, the alarm outputs are configured as normally closed or normally open. This will 
be indicated as ‘LT1  N.O.’  ( if limit 1 is programmed as normally open) or ‘LT1 N.C.’  (if limit 1 is 
programmed as normally closed). To make an alternate selection, push the ^v key. After selecting or to 
retain current setting, push the SETUP key. The following three steps are similar to the last step and in it 
limits 2 through 4 are setup as normally open or normally closed. 
 

 
The next function is configuration of relays as latching or non-latching. In non-latching mode the relays will 
reset automatically when the Process variable drops below the programmed limit. In the latching mode once 
the relays are energized they have to be reset manually  even though the process variable might have fallen 
below the limit ( latching/non-latching mode is only for process, rate and deviation limits). If the system is 
in latching mode the display will read ‘LATCH’. Alternately, the display will read ‘NON  LCH’ (for "non 
latching"). To get the alternate mode push ^v key. To retain present mode push SETUP key.