Hach-Lange SI629 C - Manual (Page 20)

16
4. Operation
4.3. Quick guide
This page shows the instrument’s operation by blocks. It is intended to provide a quick idea about all the
instrument’s capabilities and how to gain access to them.
Security acces
code.
It limits the access
to calibration
or programming
of the instrument
by non authorised
personnel.
When the “Code” screen has been shown
for more than 30 sec. the instrument will
automatically return to MEASURE.
MEASURING 22.3°C
545 µS/cm @25°
CODE 000
Vary the underlined digit with
and accept with .
Authorised code = 100
Instrument in “Hold” state
When being in the gray zone, the instru-
ment is in hold state:
• Limit and cleaning relays are open.
(Alarm OFF).
• According to the configuration the cu-
rrent output is frozen at 21 mA or at the
mA corresponding to the last measured
value.
(*) When being in Test 4-20 the current is
the one programmed manually to be able
to carry out the test.
To quit the hold state it is necessary to re-
turn to Measure. The Current output 4-20
and the Relays will activate in 10 sec.
MEASURE
CALIBRATE
CELL
CONFIGURATION
ALARM
OUTPUT 4 to 20 mA
TEST 4 to 20 mA
DATA LOGGER
See “Configuration“
( page 17)
See “Programming ...”
(page 20-21)
MANUAL RELAY
LANGUAGE
LIMITS
CLEANING
HOLD
See “Calibration“
( page 18)
See “Test 4-20 mA“
(page 24) (*)
See “Manual control
of relays
(page 24)
See “Data logger““
(page 25) (*)
si629 C_HACH LANGE_Ed 0510.indd ANG:16 si629 C_HACH LANGE_Ed 0510.indd ANG:16 20/5/10 12:06:53 20/5/10 12:06:53