Hach-Lange SI629 C - Manual (Page 24)

20
4. Operation
4.7. Programing
The instrument is supplied with the default configuration specified in Start-up, page 15.
To modify the default configuration and adapt it to specific applications follow the diagram below.
4 to 20 mA OUTPUT(*)
LLIMIT (*)
CODE 000
MEASURING 22.3°C
545 µS/cm @25°
ALARM
CLEANING
HOLD
4 mA 20 mA
200 µS 2.0 mS
ON - - - - - - OFF
1000 µS 800 µS
ALARM
01 min
CLEANING
Ton= 03 s Toff=01 h
> 21 mA
last value
Limit.
Select the relay values.
Input “ON” (closed contact).
Output “OFF” (open contact).
Conductivity: between 0.0 µS &
200 mS.
Salinity: between 0.0 mg/l &
278 g/l
* 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. Select between
1 and 99 seconds, minutes or hours.
0=deactivated.
Cleaning
T on: cleaning time. Min. value: 3
sec. (relay activated or cleaning).
To deactivate the cleaning function,
T on=0 must be programmed.
Toff: Cleaning deactivation time.
Min. value: 3 s (relay deactivated ).
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 de conductivity values
corresponding to the current output
(4 mA and 20 mA).
Conductivity: between 0.0 µS
& 200 mS.
Salinity: between 0.0 mg/l &
278 g/l t
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.
STORING DATA
(*) LIMIT and 4 - 20 mA OUTPUT: Allow the introduction of 5 digits. Place the decimal on the desired point.
Vary the underligned digit with
and accept with
Vary with
Enter code 100
Press until the desired option is reached.
Continue at
the next page.
si629 C_HACH LANGE_Ed 0510.indd ANG:20 si629 C_HACH LANGE_Ed 0510.indd ANG:20 20/5/10 12:06:56 20/5/10 12:06:56