K-Patents PR-21-S - Manual (Page 55)

6 Configuration and calibration 49
5. In the relay menu, select 2 FUNCTION to set the relay function:
1 FUNCTION NOT DEFINED Factory setting.
2 FUNCTION NORMAL OPERATION Closed contact if diagnostic message is
NORMAL OPERATION during HOLD (see Sec-
tion 6.4). The contact is also closed
when message is
NO SAMPLE .
3 FUNCTION INSTRUMENT OK Closed contact if there is no equip-
ment malfunction.
4 FUNCTION LOW LIMIT Used as alarm relay, closing contact if
source value is below set limit. (See
below for limit source selection.)
5 FUNCTION HIGH LIMIT Used as alarm relay, closing contact if
source value is above set limit. (See
below limit source selection.)
6 FUNCTION PRECONDITION See Figure 6.14.
7 FUNCTION WASH See Section 6.7.
6. If you choose either low limit or high limit as relay function, you’ll have define
a limit source. For this, select 3 LIMIT SOURCE in the Relay menu (Figure 6.6).
Limit source selection:
1 NOT DEFINED Factory setting.
2 CONCENTRATION Measured concentration CONC
3 PROCESS TEMPERATURE Process temperature
7. The Limit value is set separately by choosing 4 LIMIT VALUE in the Relay menu
(Figure 6.6) and entering a numeral limit value.
8. The Hysteresis value is set by choosing 5 HYSTERESIS in the Relay menu (Fig-
ure 6.6). The value indicates how soon the relay opens after the process has
temporarily gone over the high limit or under the low limit. For example if
the high limit is 50 and the hysteresis is 2, the relay will not reopen until the
process drops below 48.
9. To change the relay delay time, choose 6 DELAY in the Relay menu (Figure 6.6).
The delay is given in seconds, factory setting is 10 s.
For manual set, go (back) to the Select relay menu and choose 3 MANUAL SET . In the
manual set display you can open and close the any relay by pressing the appropri-
ate soft key. The current status of the relay (open or closed) is displayed next to
the relay name, see Figure 6.7 below: