Factory settings
When the instrument is switched on for the first time, the factory settings are in effect. The
following table provides an overview of all major settings. Please refer to the description of the
individual function groups in chapter 5 for all other factory settings (the factory settings are
printed in
bold
).
Alarm contacts
Normal operating status:
• Instrument in operation
• No error message available
(Alarm LED off)
→
Relay picked up
→
Contact 42/43 closed
Alarm state:
• Error message available (Alarm LED red)
or
• Instrument defective or voltage-free
(Alarm LED off)
→
Relay dropped out
→
Contact 41/42 closed
Function
Factory setting
Measurement type
Oxygen concentration, Temperature in °C
Temperature offset
0.0 °C
Limit 1
20.00 mg/l
Contact function of limit contactor 1
min contact without delay
(switches when limit 1 is exceeded)
Limit 2
20.00 mg/l
Contact function of limit contactor 2
max contact without delay
(switches when limit 2 is exceeded)
Current outputs 1 and 2*
4 ... 20 mA
Current output 1: meas. value for
4 mA signal current
0.00 mg/l
Current output 1: meas. value for
20 mA signal current
10.00 mg/l
Current output 2: temperature
value for 4 mA signal current*
–10.0 °C
Current output 2: temperature
value for 20 mA signal current*
60.0 °C
Altitude
0 m above sea level
Salinity
0.0% salt concentration
* If equipped accordingly
RELAIS2.CDR
Normal operating status
Alarm status
41
43
42
41
42
43
Fig. 5.3
Recommended fail-safe
circuit for the alarm
contact
Instrument configuration
Liquisys M COM 223 F / 253 F
22
Hauser
