Programming - HACH LANGE si629 P Manuel D'utilisateur

4. Operation

4.5. Programming

The instrument is supplied with the factory settings indicated in page 15. To modify and adapt it to spe-
cific applications follow the diagram:
Limit.
Select the relay values.
Input "ON" (closed contact).
Output "OFF" (open contact).
Values to be selected between:
0...14 pH / -2000...2000 mV.
* LIMIT 2 / CLEANING
The option LIMIT 2 will only
appear if relay 2 is configured as
a limit relay.
Alarm
Selection of the time lag before
activating the alarm. To be selec-
ted between 1 and 99 seconds,
minutes or hours.
Cleaning
T on: cleaning time. Min. value:
3 sec. (relay activated or cle-
aning). To deactivate the cleaning
function, T on=0 must be progra-
mmed.
Toff: Cleaning deactivation time.
Min. value: 3 s (deactivated
relay).
Example: Ton: 3 sec., Toff: 1 h;
it will clean during 3 sec. each
hour.
Post-cleaning time: 0 to 99 sec.
Output current.
Select the pH or mV values corres-
ponding to 4 - 20 mA.
Values to be selected between
pH 0 to 14 / -2000 to 2000 mV.
Hold. Selection of the current
output when the instrument is in
Hold state: fixed at 21 mA or at
the mA corresponding to the last
measured value.
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si629 P_HACH_LANGE_Ed.0510.indd ANG:18 si629 P_HACH_LANGE_Ed.0510.indd ANG:18
M E A S U R E
pH 7.34 25.2 °C
CODE 000
LIMIT 1
* LIMIT 2
ALARM
* CLEANING
OUTPUT 4-20 mA
HOLD
ZONE IN GRAY:
Example of relays programming, with ON/OFF Control.
Example of relays programming, with PROPORTIONAL Control, see page 19.
To change the type of control, ON/OFF or proportional, see Configuration,
page 17.
ON L1 OFF
pH 06.0 pH 06.5
ON L2 OFF
pH 08.0 pH 07.5
ALARM
10 min
CLEANING
Ton= 03 s Toff=01 h
4 mA - 20 mA
pH 00.0 pH 14.0
Hold > 21 mA
last value
20/5/10 13:00:51 20/5/10 13:00:51