EsiWelma Srl
URS40SL_en.doc - rev. 0
Oxygen detectors – URS40SL
11/04/2011
Gas detection systems for industrial environments
2/4
Technical
characteristics
Type of sensor
Electrochemical cell
Detectable Gas
O
2
excess O
2
deficiency
Power supply
11÷14Vdc
Max power consumption
0,7W
Measuring range
0…30% O
2
Precision
±
5% full scale,
±
10% readout
Repeatability
±
5% full scale,
±
10% readout
Measurement resolution
0.1% O
2
Microprocessor resolution
1024 points (10 bit)
Digital filter system
Kalman Filter
Watchdog Internal
Warm-up time
< 2m
Stabilization time
< 2m
Response time
< 20s (T50), < 60s (T90)
Average Sensor life (in air)
120 weeks
Threshold limit settings
(default setting):
Pre-alarm
1
st
threshold alarm
2
nd
threshold alarm
22% O
2
23% O
2
24% O
2
19% O
2
17% O
2
15% O
2
Operating Temperature
Storage Temperature
-20
÷
50 °C
-20
÷
70 °C
Relative Humidity
(without condensing)
-
Operation
-
Storage
15
÷
90 %RH
45
÷
75 %RH
Operating pressure (KPa)
80
÷
110
Air speed (m/s)
≤
6
Visual warnings
Red LED visible with detector energized
The steady LED status can be forced by
the Control Unit to identify the sensor on
the plant
Dimensions and weight
See dedicated section
Options & Accessories
TUL40..
Gas calibration kit
See installation and commissioning chapter
TUS40
Handheld terminal
for service and maintenance
See installation and commissioning chapter
CRG40
Gas collecting cone
See dedicated data sheet
PAP40
Powerful jets protection
See dedicated data sheet
EC Conformity
EMC Directives / Standards
LVD Directives / Standards
Electromagnetic Compatibility Directive
EMC 2004/108/EC, Standard EN50270
Not applicable
Sensors lifetime
Sensor average lifetime (see technical characteristics) is referred to a typical usage
in a pollution-free environment. Presence of a high concentration of pollutants can
shorten the lifetime of the sensing element.
Once the detection system starts up, it has to be supplied with energy during all the
lifetime of its sensors. Seasonal use of the detection system is not recommended.
Seasonal use of the detection system is not recommended.
