Operating Instructions

23Operating Instructions VisiTrace
™
mA Sensors
MAINTENANCEOPERATION
7 Maintenance
Periodic maintenance routines need to be run in order to
ensure safe and reliable operation and measurement of sensor
and the accessories.
ATTENTION! Avoid any contact of the equipment
with corrosive media.
ATTENTION! Please screw the protection cap on
the M12 sensor connector when disconnecting the
sensor M12 cable.
7.1 Verify Sensor Status and ODO Cap
Functionality
1) Power the sensor with the M12 Sensor Power Cable and
connect the sensor to ArcAir
2) Control the status (Figure 12)
3) Please refer to the troubleshooting (Chapter 8) for the
next steps if the traffic light is not green
4) Control the quality of the sensor, ODO cap or measurement
in ArcAir under Sensor Information or Quick View / Sensor
Health and change the ODO Cap or sensor if required
( C h a p te r 7. 2)
NOTE: The lifetime of the VisiTrace mA mA highly
depends on the specific conditions of the application.
Temperature, pressure, chemicals used may accelerate
the ageing of both the sensor and its ODO cap. A warning
«Maintenance required» remains active as long as the cap
or sensor quality is below 40%. Make sure that after new
cap or sensor replacement the measurement quality
status is green. The measurement quality status takes
sensor and cap into account.
The sensor is performing correctly.
No errors or warnings have been registered.
At least an error or a warning has been registered.
Verify the sensor errors and warnings in Sensor Status.
No communication between the sensor and ArcAir.
This may be due to a hardware failure.
Figure 12: Description of the traffic lights on ArcAir
7. 2 Replacing the ODO Cap
The exchange of ODO Cap is performed very easily:
1) Unscrew the ODO cap from the shaft (Figure 12)
Sensor PCS (Remote – I/O passive)
M12 Pin 3
M12 Pin 2
4–20 mA
4–20 mA
+ 4–20 mA
– 4–20 mA (GND)
External Power Supply
0 VDC;
+24 VDC
B
Figure 11: Two- wire loop wiring diagram for the 4-20 mA interface.
A: with an active current input card. B: with a passive current input card.
NOTE: If the current input card GND is internally
connected to GND of the Power Supply you do not have
to connect both GNDs externally.
6 Operation
ATTENTION! Only use the sensor within the speci-
fications (www.hamiltoncompany.com). Failure to do
so may lead to damages or measurement failure.
1) Remove the protective caps from the VisiTrace mA shaft,
and from the M12 sensor head
2) Mount the O-ring on the sensor shaft and screw the
ODO Cap firmly (Chapter 7.2)
3) Verify the functionality of the sensor including the ODO
cap (Chapter 7.1)
4) Scan the barcode on the ODO Cap label with the ArcAir
mobile barcode scanner or enter manually the information in
the sensor/ Sensor Information.
5) Calibrate the sensor (Chapter 7.3)
6) Connect the sensor to the process control system (Chapter 5)
7) Verify the measurement in 1%vol. oxygen on your
control system
8) Mount the sensor to the armature or process connection
(Chapter 5.3)
NOTE: No oxygen measurement is performed at a
temperature higher than 85°C to protect the optoelec-
tronics and enhanced the sensor lifetime.
ATTENTION! Please scan the barcode or enter the
data into ArcAir prior first use of a replacement cap.