Sensitron SMART S-IS, Instruction Manual

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ENGLISH
Pag. 20
1.2 Gas detector identification
The SMART S-IS detector code consists of four parts that identify the various parts (see prod-
uct data sheet for further details):
SIS:
Intrinsically safe detector, SIS model.
Enclosure code:
4A or 2S depending on the detector enclosure.
Transmitter code:
21, 22, 23 o 24 depending on the electronics (type of display and
relay cards).
Sensor head code:
a unique code for each sensor head depending on gas to be detect-
ed and full scale range.
1.3 Technical specifications
Table 1) Technical specifications of SMART S-IS gas detectors
Sensing element Electrochemical cell
Gas and measurement
range
O2: 0-25% vol.
SO2: 0-20 ppm
NO2: 0-20 ppm
Cl2: 0-20 ppm o 0-5 ppm
HCl: 0-50 ppm
Predicted sensor lifetime 2/3 years
Power supply
12- 24 Vdc - 20% + 15%
Vmax 30 Vdc
Um 30 V
Maximum power 4,5 W
Control unit Microprocessor 32 bit
Watch-dog Internal and external for the microprocessor status control
Visual indications 8 alphanumeric characters display and 7 status LEDs
Max load resistance 200 Ω on the 4-20mA output line
Signal output RS485 for MU+; analogue 4-20 output
Relay outputs (optional) 3 relays with tension free changeover contact 24 V-1 A
Auto zeroing routine Zero drift compensation
Digital filter Variable average on the sampled values
Repeatability From ±2% to ±5% FS (depending on sensor type)
Accuracy From ±2% to ±5% FS (depending on sensor type)
Warm-up time 120 s
Stabilization time 60 minutes
Storage temperature 0 / +20°C up to 6 months
Operating condition:
Temperature
Humidity
-20 / +50°C
15 / 90 %RH (non condensing)
SIS Enclosure code Transmitter code Sensor head code -