ARI Armaturen CONA control EN - Manual (Page 8)

Page 2-8 Rev. 0040807014 1614
Operating and Installation Instructions
CONA
®
-control
4.4 Measuring amplifier
Detection temperature:
The detection temperature is set to approx. 95°C in the delivery condition. To prevent status
indications from being interpreted as faults when the plant is shut down, this temperature
limit should be set to a value about 10°C lower than the sub-cooling temperature of the
steam trap.
"Steam Leakage" and "Blockage" indications should then appear simultaneously when the
plant is shut down but not be interpreted as faults (refer also to "6.3.2 Shutting down the
plant").
To calibrate the sensor:
- Disconnect the heating from the power supply. To do this, withdraw the 5 V plug-in contact
(2)
- If possible, submerge the sensor in water so that the temperature sensors reach the same
temperature in a very short time. Alternatively, wait four or five minutes before starting the
next step
- Using the potentiometer (4), adjust the LEDs so that they all light up with the same
brightness
- Re-insert the 5 V plug-in contact for the heating
To replace / exchange the LED / AS-i card:
- The measuring amplifier must always be de-energised prior to replacing the LED or AS-i
card!
- Withdraw the old card and insert a new card
Fig. 5
No. Designation
1 Status LEDs
2 Contacts for sensor
3 DC or AS-i circuit
Input:
Input voltage 30 V DC
4 Potentiometer for calibrating
temperature sensors
5 LEDs for calibrating temperature
sensors
6 Potentiometer for setting blockage
detection temperature (default:
95°C)
7 LED - Relay or AS-i bus card
8 Addressing plug
(only in conjunction with
AS-i bus card)
Inside view