Sensitron P User manual

MT3481E.doc rev.2 20/06/2018 Pagina 1 di 14

USER MANUAL FOR

SMART “P” GAS DETECTORS

SENSITRON S.r.l. Viale della Repubblica, 48

20010 CORNAREDO MI - Italy

Ph: + 39 02 93548155 Fax: + 39 02 93548089

E-MAIL: [email protected]

Technical Manual SMART P

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Warning

THIS MANUAL MUST BE CAREFULLY READ BY ALL PERSONS WHO HAVE OR

WILL HAVE THE RESPONSIBILITY FOR INSTALLING, USING OR SERVICING THIS

PRODUCT.

Like any equipment, this product will perform as designed only if installed, used and

serviced in accordance with the manufacturer’s instructions. OTHERWISE, IT COULD

FAIL TO PERFORM AS DESIGNED AND PERSONS WHO RELY ON THIS PRODUCT

FOR THEIR SAFETY COULD SUFFER SEVERE PERSONAL INJURY OR DEATH.

The warranties made by Sensitron s.r.l. with respect to this product are voided if the

product is not installed, used and serviced in accordance with the instructions in this

user guide. Please protect yourself and others by following them.

We recommend our customers to write or call regarding this equipment prior to use or

for any additional information relative to use or repair.

Technical Manual SMART P

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INDEX

1) DESCRIPTION...................................................................................................................................... 4

1.1) TECHNICAL SPECIFICATIONS.............................................................................................................. 5

2) INSTALLATION.................................................................................................................................... 6

2.1) CIRCUIT LAYOUT............................................................................................................................... 7

2.2) ELECTRIC WIRING............................................................................................................................. 8

2.3) DETECTOR POWER ON..................................................................................................................... 9

2.4) TESTING AND USE ............................................................................................................................ 9

2.5) HANDHELD CALIBRATION KEYPAD ST.S/CKD PK............................................................................... 9

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1) DESCRIPTION

SMART P gas detectors come in the following versions based on the type of gas to be

detected:

CO, range 0-300 ppm, 3 pin industrial cell

NO2, range 0-30 ppm, 3 pin industrial cell

Detectors with dual sensor were manufactured to optimise installation costs, coupled with the

CO-NO2 and CO-PETROL VAPOUR sensor in a single case.

SMART P use high performance sensor cells and test all functions including a self test for

CO cell reliability.

SMART P detectors are set for 4-wire connections: 2 for power and 2 for data communications

via RS485 serial to the MULTISCAN++PK unit.

SMART P provide fast and safe installation as well as easy maintenance and field calibration

via the STS/CKD-PK calibration keypad.

Detectors run on 12-24 Vdc power and sold in IP55 metallic cases.

SMART P-1

Designed to fulfil the new European Standard

for gas detection in car parks, the SMART P-1

gas detectors provide a serial RS485.

The SMART P-1 employ electrochemical cells

for the detection of CO or NO2.

To meet with the standard in full, these

detectors are to be connected to

MULTISCAN++PARK gas control panels.

SMART P-1 detectors for Carbon Monoxide and NO2

CODE

DESCRIPTION

CAT.

€

S2398CO

CO detector for car parks RS485 serial outputs. Range 0-300

ppm.

240,00

S2399ND

NO2 detector for car parks, RS485 serial outputs. Range 0-30

ppm.

320,00

SMART P-2

Designed to fulfil the new European Standard

for gas detection in car parks, the SMART P-2

gas detectors offer the simultaneous detection

of CO and NO2 or Petrol vapours integrated in

the same detector.

The SMART P-2 provide a serial RS485.

To meet with the standard in full, these

detectors are to be connected to

MULTISCAN++PARK gas control panels.

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SMART P-2 detector for Carbon Monoxide and Nitrogen Dioxide/Petrol

Vapours

CODE

DESCRIPTION

CAT.

€

S2400CO-ND

CARBON MONOXIDE & NITROGEN DIOXIDE detector for car

parks, RS485 serial output. Range 0-300 ppm CO and 0-30

ppm NO2.

400,00

S2400CO-VB

CARBON MONOXIDE & PETROL VAPOURS detector for car

parks, RS485 serial output. Range 0-300 ppm CO and 0-

100%LEL Petrol Vapours.

420,00

CALIBRATION TOOLS for SMART P

CODE

DESCRIPTION

CAT.

€

STS/CKD-PK

Handheld calibration keypad to be connected to the detector to

adjust the Zero, Span and 4-20mA values.

200,00

1.1) Technical specifications

Typical use

To be used with MULTISCAN++PK

256/128/64/32 type units to monitor toxic gas in

car parks and garages

Detectable gas

Carbon Monoxide 0-300 ppm.

Nitric dioxide 0 - 30 ppm

Petrol Vapours 0-100% LEL

Sensor used

Electrochemical cell for CO and NO2. Catalytic

for Petrol Vapour.

Power

12-24 Vdc (-20% +15%)

Proportional output

RS485 serial

Absorption at

12-24Vdc

CO max 70mA

NO2 max 70mA

CO+NO2 max 80mA

CO+PETROL VAPOUR max 110 mA

Repeatability

5% FS

Storage temp.

-25 / + 60 °C

Working temperature

-20 / + 60 °C

Relative humidity

20-90 % non condensed RH/40°C

IP protection level

IP55

Weight

600 gr.

Dimensions

L. 100, H. 180, D. 65 mm

Estimated sensor life

4 years for CO and PETROL VAPOUR sensors

3 years for NO2 sensor

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2) INSTALLATION

At the mounting and installation phase be sure all safety precautions have been

considered.

Always consider how important it is the correct positioning of gas detectors to get the

optimum response. Be careful never to install gas detectors close to air intakes or fans

causing strong air currents.

Be sure the detectors are attached to a firm base to prevent vibration that can damage

them, producing unreliable results.

Although the electronics comply with the electromagnetic compatibility rules, it is

advised to keep the detectors at a distance from any radio frequency senders (such as

radio links or similar).

Please be also sure that detectors are placed in a convenient location for future

maintenance and calibration requirements.

We recommend you mount the Smart P detector at nose level (about 150 cm off the ground)

since this is the position suited to detect CO and NO2. The Petrol Vapour detector should, on

the other hand, be installed about 30 cm off the ground. the CO+PETROL VAPOUR detector

comes with an extension kit to mount the Petrol Vapour sensor 30 cm off the ground.

Also remember that correct detector positioning is essential to ensure prompt and accurate

detection.

The gas detector is always to be mounted with the sensing element placed downward.

For no reasons at all the enclosure can be drilled.

Wall mount the detectors by employing the existing holes

150mm

front back

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2.1) Circuit layout

Connections terminal block

Morsettiera collegamento

Scheda elettronica rilevatore

Detector electronic board

Sensor Head 2 connection (E.C. Electr. Cell or Cat sensor)

Testa sensore 2 (E.C. Cella Elettrochimica o sensore catalitico)

Jp10 Rs485 End of Line 120 Ohm resistor

Closed: resistor Open: no resistor

Jp10 resistenza fine linea Rs485 (120 Ohm)

Closed: resistenza ins. Open: no resistenza

Sensor Head1 connection (E.C. Electr. Cell)

Testa sensore 1 (E.C. Cella Elettrochimica)

Jp8 selezione baudrate Rs485 comm

APERTO:9600 Bps / : 115000 Bps

Jp8 Rs485baud rate selection

OPEN:9600 Bps /CLOSED : 115000 Bps

Jp7 connection of hand held

calibration keypad

Jp7 collegamento

tastiera calibrazione

Dl2 Led Green: detector activity.

Repeat the various detector status

Led Verde Dl1: attività dispositivo.

Ripete i diversi stati del rilevatore

Dl3 Led Red: Rs485 monitor

Lit in communication

Led Rosso Dl3: monitor

Rs485. Accesso in comunicazione

Dl2 LedRed: Rs485 Watch dog

monitor. Serious problem Led ON

Led Rosso Dl2: monitor Watch dog

Led ON guasto dispositivo

CHIUSO

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2.2) Electric wiring

The connection of the detectors to RS485 bus lines should be performed by using a 4-wire

cable, 1 pair for the RS485 bus and 1 for the power supply.

Wiring between the detectors and the control panel should be made by using connection cable

EIA RS485: 2 core wires with section 0.22 / 0.35 mm2 and shield (twisted pair). Nominal

capacity between the wires <50pF/m, nominal impedance 120 ohm.

These features can be found in BELDEN cable 9842 or similar (data transmission cable in EIA

RS485).

Using this wiring, the total length of the line should not exceed m 1000.

Detectors and output modules are to be wired in daisy chain mode. We recommend avoiding

star or tree mode connection as interference immunity would be reduced.

Make sure that a 120 Ohm end line resistor is placed at the beginning and at the end (on the

last detector or output module) of the bus line.

For the detectors' power supply connection we recommend to use a 2-wire cable with suitable

section according to the distance and number of detectors.

Once the installation has been completed, verify that each detector reaches at least 12 Vdc.

Each Smart P detector connected on the unit line must have a univocal address. Use the

specific STS/CKD PK keypad to set the detector address. See the specific paragraph below in

the manual.

Detector

Al rilevatore successivo (*)

to the next detector (*)

Dalla centrale

From the control panel

note: if the detector (or the module)

is the last of the line: close

the 120 ohm resistor jumper

nota: se il rilevatore (o il modulo uscite)

è l’ultimo sulla linea: chiudere

il jumper della resistenza da 120 ohm

A B

ST.G/OUT16 module

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2.3) Detector power ON

When the detector is powered on, the green LED DL1 on the motherboard starts blinking at

slow intermittence.

After nearly two minutes, the red LED flash rate is equivalent to the detector working status (see

table below).

Once the warm-up phase is over, the detector can work correctly, although the optimal

performances will be achieved after two hours.

2.4) Testing and Use

Detectors are factory calibrated for the specific gas required by the customers. Future

adjustment of the preset calibration can be carried out by employing the calibration keypad.

Testing should be carried out by using a gas mixture in the appropriate range, along with our

calibration kit.

The green DL1 LED on the electronic board flashes to indicate detector status as illustrated in

the table below.

LED DL1 (green) shows the detector's operative status (mS= milliseconds)

Warm-Up

Flashing 750 mS ON; 250 mS OFF

Fault low

Lit fixed

Allarm 1

Flashing 250 mS ON; 1750 mS OFF

Allarm 2

Flashing 250 mS ON; 250 mS OFF; 250 mS ON; 1250 mS OFF

Allarm 3

Flashing 250 mS ON; 250 mS OFF; 250 mS ON; 250 mS OFF

250 mS ON; 750 mS OFF

Fault high

Flashing 250 mS ON; 250 mS OFF

Normal status

Flashing 1 sec. ON; 1 sec. OFF

2.5) Handheld calibration keypad ST.S/CKD PK

Smart P gas detectors offer a field adjustment for the Zero, Span (response to gas) and the

serial address (for the RS485 bus).

By operating with the handheld calibration keypad, pressing ENTER, ESC, Arrow UP and Arrow

DOWN, the Zero, Span and serial Address shall be accomplished.

The keypad can be connected when the detector is powered ON and operating. Before opening

the detector enclosure, be sure all safety precautions have been considered.

Insert the female connector of the keypad at the edge of the flat cable into the male connector

on the Smart P main board.

Once connected, the keypad will display the gas concentration being measured.

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Adjustments are required whenever either Fault or unjustified Alarms due to environmental

conditions occur (Zero adjustment) or detectors need modifying their response to gas (Span

adjustment).

Span adjustment requires a calibrated gas cylinder, either filled with the same gas the detector

has been calibrated for or a reference gas advised by the manufacturer

For the Zero adjustment, gas detectors are to be in fresh air (without any gas or interfering

compounds) and powered on since 8 hours at least.

Once the routine is over a test with gas is to be made to verify the right working condition.

KEYPAD

Fig. 2.5 a) Connection of the calibration keypad

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