MA-5950_EN.doc
Page 9 on 15
Rev: 29-03-19
5.
USE IN POTENTIALLY EXPLOSIVE ATMOSPHERE (OPTION)
5.1.
Intrinsic safety protection
Use of sensors in hazardous zones can only be done with Ex marked sensors, delivered with one or more of the
certificates hereunder:
ATEX: ISSeP07ATEX012X
SENSY’s load cells which are marked Ex i comply with the following standards:
ATEX
EN 60079-0: 2012
EN 60079-26: 2007
EN 60079-11: 2012
The use of junction boxes or additional cable lengths must be considered in the choice of protection. The electrical characteristics of the cable
being limited (see certification), it is recommended to carefully chose the cable length and avoid any winding of the cable. After having defined all
elements, it is mandatory to control if the sensor’s output tension is still compatible with the electronic device in use and the requested accuracy.
See certificate for the special conditions for safe use.
6.
PERIODIC INSPECTIONS
1.
Check output for zero load (annually)
Output signal
Min acceptable
Max acceptable
mV/V / 4 wires
-0.15 mV/V
0.15 mV/V
4-20mA / 2 wires
3 mA
6 mA
4-20mA / 3 wires
3 mA
6 mA
0- 5V / 3 wires
0 V
0.8 V
0- 10V / 3 wires
0 V
0.8 V
1-5V / 3 wires
0.5 V
1.5 V
1 -10V / 3 wires
0.5 V
1.5 V
-10 / 0 / + 10V
-1.5 V
1.5 V
2.
Make sure that the axle beam has not been knocked (markings) or chemically attacked (some corrosive greases). If points 1 and 2 are not
accounted for, just take preventive measures. (annually)
3.
In case of doubt, reply to the diagnostic questionnaire available on Web: www.sensy.com/support.
4.
Verify the integrity of the cable.
5.
After any serious functioning incident, repeat operations 1 to 4.
