GASSONIC SURVEYOR User manual

TECHNICAL DOCUMENTATION t
USER GUIDE FOR
GASSONIC SURVEYOR
ULTRASONIC GAS LEAK DETECTOR

CONTENTS
1.0 The Gassonic Surveyor.....................................3
1.1Application..........................................3
1.2 Working principle ......................................3
1.3Mainfeatures ........................................3
2.0 Background noise mapping .................................4
2.1 Noise levels..........................................4
3.0Mounting ..............................................5
4.0Mechanicalconstruction...................................6
4.1 Mechanical operation and safety . . . . . . . . . . . . . . . . . . . . . . . . . .7
4.2Sparepartsandaccessories .............................7
4.3 Mechanical operation and safety . . . . . . . . . . . . . . . . . . . . . . . . . .7
5.0Alarmdelayandtriggerlevel ................................8
5.1Outputmethods ......................................8
5.2 Using the 4 - 20 mA output ..............................8
5.3Alarmrelay ..........................................9
5.4Errorrelay...........................................9
5.5 NAMUR or dry contact ..................................9
6.0 Test and calibration ......................................10
7.0 Gain test procedure......................................11
8.0Delaytestprocedure.....................................12
9.0Calibrationprocedure ....................................13
10.0 Step test.............................................15
11.0 Gassonic Surveyor LED interface . . . . . . . . . . . . . . . . . . . . . . . . . . .16
12.0Troubleshooting .......................................16
13.0 Power consumption .....................................16
14.0 Wiring ...............................................19
15.0 Technical data .........................................20
16.0 Suppliers declaration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
17.0 Warranty Statement .....................................22
18.0 Appendix.............................................23
Installation and User Guide for Gassonic Surveyor (BB6019-01) Page 2

The Gassonic Surveyor is an ultrasonic gas leak detector. It is designed to detect pressurized gas leaks by sensing the
ultrasound generated by escaping pressurized gas. The detector is designed for use in harsh environments and extreme
weather conditions, making it ideal for detecting leaks in complex pipeline systems both onshore and offshore.
Gassonic Surveyor is developed, marketed and serviced by Gassonic A/S. Gassonic A/S is part of the General Monitors
family of companies. The Gassonic Surveyor and other selected Gassonic products are manufactured by General
Monitors, Ireland.
1.2 - WORKING PRINCIPLE
When gas leaks from a pressurized system, it emits a characteristic “hissing” sound. A part of this sound is high frequency
ultrasound, which can not be heard by humans.
As the detector senses ultrasonic noise, the Gassonic Surveyor does not have to be in contact with the leaking gas itself.
It will detect the gas leak instantly even if the gas is carried away by wind or diluted in the air. The Gassonic Surveyor can
be used in configurations with other detection methods.
1.3 - MAIN FEATURES
Detection radius 5 to 20 meters, depending on ultrasonic background noise level.
Sensor technology Stainless steel microphone technology
Outputs Analogue 4-20 mA interface and Alarm relay or Error relay. (NAMUR and dry contact).
Visual output Red and green LED
Housing Acid-proof stainless steel (316L)
Certifications ATEX and IEC Ex, Intrinsically Safe (Ex-i) (Available on Gassonic website)
1.1 - APPLICATION
The Gassonic Surveyor is ideal for:
• High pressure gas facilities (methane, hydrogen etc.)
• Petrochemical processing plants
• Gas pipeline compressor stations
• Gas storage facilities
1.0 - THE GASSONIC SURVEYOR
Installation and User Guide for Gassonic Surveyor (BB6019-01) Page 3

2.0 - BACKGROUND NOISE MAPPING
The Gassonic Surveyor filters out frequencies below 25 kHz. However, a few sources other than leaking gas may produce
ultrasonic noise above 25 kHz, and could therefore trigger the detector. To avoid these sources influencing the gas leak
detector, it is recommended to perform a background noise mapping survey of the plant using the Gassonic 1700
Ultrasonic Mapping Meter.
The mapping survey makes it easy to adjust the trigger level and the delay time of each detector so that it is unaffected by
background noise in the area covered. Gassonic can be contacted for further details on performing this mapping survey.
2.1 - NOISE LEVELS
It is helpful to know the actual noise level before installation, as this has influence on the Gassonic Surveyor’s detection
range. Most environments can be divided in three overall noise levels.
1 2
3 m
1m 2m 3m 4m 5m 6m 7m 8m 9m 10m 11m 12m13m 14m15m 16m
12 3
3
VERY LOW-NOISE AREAS
In ”very low-noise areas”, where
background noise is below 58 dB,
the trigger level must be set to at
least 64 dB. This corresponds to
a detection radius of 13-20 m.
Typical areas:
• Onshore wellhead areas in
calm environment
• Salt dome gas storage
facilities in calm environment
LOW-NOISE AREAS
In ”low-noise areas”, where
background noise is below
than 68 dB, the trigger level
must be set to at least 74 dB.
This corresponds to a detection
radius of 9-12 m.
Typical areas:
• Areas with no machinery
• Areas with low frequency
machine made noise
HIGH-NOISE AREAS
In ”high-noise areas”, where
background noise is below 78 dB,
the trigger level must be set to at
least 84 dB. This corresponds to
a detection radius of 5-8 m.
Typical areas:
• Turbo compressor areas
• Complete open offshore
weather deck
• Next to very noisy machinery
If the Gassonic Surveyor is mounted
above floor grating, the detection
range will continue downwards.
Installation and User Guide for Gassonic Surveyor (BB6019-01) Page 4

17m16m15m14m 13m 12m 11m 10m 9m 8m 7m 6m 5m 4m 3m2m1m
3.0 - MOUNTING
1
1
2
2
3
3
For optimal detection coverage the Gassonic Surveyor should be
mounted at a height of 1 to 2 meters above potential leak spots, and
if possible in a position which makes it accessible for maintenance
purposes. In special cases, such as installation over compressors,
the height can be increased.
The Gassonic Surveyor can be mounted on a pole or a wall using the
optional mounting bracket UA1352A for standard horizontal mount-
ing or on the 45° mounting bracket UA1353. It can also be mounted
on a ceiling, on structural beams or similar non-vibrating structures.
As it primarily detects in a downward direction the unit must be
mounted with the microphone compartment facing down. This will
also prevent dirt from collecting in the wind screen, which may block
the sound.
To ensure optimal performance, correct mounting of the Gassonic
Surveyor is essential.
Mount the detector so it is clear of solid physical structures such as walls and heavy machinery, as these will dampen
any ultrasonic noise, leading to reduced detection coverage. Normal piping will not affect the coverage.
FULL COVERAGE REDUCED COVERAGE
OBSTRUCTION E.G. A CONCRETE WALL
If necessary, the Gassonic Surveyor can be
mounted with an inclination not exceeding
45°. If mounted next to a wall, the inclination
will provide improved coverage. The optional
mounting bracket UA1353 can be used for
mounting at a 45° angle.
1m 2m 3m 4m 5m 6m 7m 8m 9m 10m11m 12m 13m 14m 15m16m
45˚
Installation and User Guide for Gassonic Surveyor (BB6019-01) Page 5

The Gassonic Surveyor is an intrinsically safe (Ex-i) ultrasonic gas leak detector. The cables are connected through M20
x 1.5 cable entries in the top part using glands according to Ingress Protection class IP66. The inner cores of the cable
penetrating the detector should be 200 mm long. This will ensure no tension on the wires and the connectors when the
unit is opened. The two mounting bolts are on the top part of the detector. This means that the cables will enter on the
fixed part of the detector. The bottom part is attached to the top part by means of four allen screws with water sealing
washers. Loosening these screws will expose the connectors. The screws will be retained in the bottom part and will not
drop out. The bottom part of the detector is supported by the Load-strap, which is connected to the top part.
1. Top
2. Bottom
3. Mounting Bracket UA1352A
4. Sealing flange and sealing gasket
5. Windscreen DS0592
6. Microphone MM4190
7. M5 x 16 Allen screw
8. M5 Sealing washer
9. User LED
10. Communication LED
11. Earth connection inside
12. Earth connection outside
13. Cable entries M20 x 1.5
14. Earth wire and strap between Top and Bottom part
15. Protective plate permanently attached
16. Rotary switches
17. Jumpers
18. Eex-i connectors
}
The Gassonic Surveyor is mounted from the top with two 8 mm stainless steel bolts. Maximum thread depth is 15 mm. To
open the unit, loosen the four screws. The screws are secured, and will not drop out. When closing the unit use a torque
of 6Nm on the 4 screws.
The lower part of the unit is supported by a solid cable strap on which it can hang while connecting the cables.
When connecting the cables and moving the jumpers, the power of the unit must be switched off.
See wiring diagram on page 18.
1
2
11
4
3
7
14
15
6
17
17 15
13
7
8
12
9
10
5
6
4.0 - MECHANICAL CONTRUCTION
EU0001
Installation and User Guide for Gassonic Surveyor (BB6019-01) Page 6

4.1- MECHANICAL INSTALLATION
Two M8 stainless steel bolts (not supplied), 88mm apart, attached to the top of the detector are used to fix the Gassonic
Surveyor in its operating position. These bolts may penetrate the detector top by a maximum of 14 mm. The detector
can be mounted using a Gassonic mounting bracket. The bracket is an optional accessory and is supplied with two M8
mounting U-bolts which can fit around a pole with a maximum dimension of 63 mm.
4.2 - SPARE PARTS AND ACCESSORIES
DESCRIPTION GASSONIC PART NUMBER
Screw & Sealing Washer Kit EU0001
Microphone* MM4190
Magnet stick UC5352
Mounting bracket (standard) UA1352A
Mounting bracket (45° angle) UA1353
Torque wrench EZ1000
Windscreen* DS0592
*The following parts are field replaceable but not consumable parts: Allen screw, Sealing washer, Microphone and
Windscreen.
4.3 - MECHANICAL OPERATION AND SAFETY
When closing the top chamber ensure that the Load-strap and wires are not caught between the bottom part and the
top part of the detector. Check the status of the rubber sealing and the flange. Send the unit to Gassonic for repair if the
flange and/or the rubber sealing is damaged. Check the sealing washers and replace them if they are damaged. The four
allen screws with sealing washers must be tightened to 6 Nm using a torque-wrench.
Installation and Maintenance must be carried out by suitably skilled and competent personnel only. Before opening and
working on the Gassonic Surveyor in hazardous locations, be sure that power is off.
High readings of ultrasonic sound level may indicate an explosive concentration of gas at the sensor. A subsequent fall
in the ultrasonic sound level does not imply that safe working conditions have been restored.
Install and maintain all hazardous area equipment in accordance with the relevant regulations and practices of the
country concerned.
WARNING:
The inner three screws should not be unscrewed and the bottom part should not be opened.
The warranty will be void if the bottom part is opened.
Installation and User Guide for Gassonic Surveyor (BB6019-01) Page 7

5.1 - OUTPUT METHODS
The Gassonic Surveyor has two output methods:
Standard 4-20 mA output. When using this output method a trig-
ger level and delay time should be set in the Fire & Gas system.
Alarm relay or Error relay. The unit has one relay output. This
can be configured to be either an Alarm or Error relay. When us-
ing the Alarm relay, the trigger level and delay time should be set
internally.
The relay (Alarm or Error) output is also changeable from NAMUR
to Dry contact. It must be decided which output is the best suited
for each application. Factory default settings are: Alarm relay and
NAMUR output.
sec
dB
4
20
mA
0
20
40
60
80
100
120
Delay time Alarm
Ambient background noise
Trigger level 12
40
30
20
10
5.2 - USING THE 4-20 MA OUTPUT
When using the 4-20 mA output, the trigger level and the delay time are set in the Fire
& Gas system. The 4-20 mA output is a straight output. This means that if the noise
level increases the output current increases as well. The trigger level must be set at
least 6 dB higher than the ambient ultrasonic background noise level.
It is good practise to set the internal trigger level to the same level as the 4-20 mA
trigger level in the F&G system.
dB mA
44 4,0
54 6,7
59 8,0
64 9,3
69 10,7
74 12,0
79 13,3
84 14,7
89 16,0
94 17,3
99 18,7
104 20,0
◄ Noise levels (trigger levels) and the relating output
values. Other values can be calculated using this formula:
mA=(((dB-44)/60)*16)+4
or
dB=(((mA-4)*60)/16)+44
In this example the trigger level is set to 74
dB (corresponding to 12 mA) and the alarm
delay time to 10 sec.
An alarm delay time prevents false alarms when the
Gassonic Surveyor detects spikes of high level ultrasonic
noise. After the delay time has run out an alarm will be
triggered, but only if the noise level is still above the trig-
ger level. It is imperative to incorporate an alarm delay
time of at least 10 seconds.This can be set locally in the
unit if using the relay or in the Fire & Gas system if using
the 4-20mA output. The trigger level is set at least 6 dB
higher than the ambient ultrasonic background noise.
5.0 - ALARM DELAY AND TRIGGER LEVEL
Installation and User Guide for Gassonic Surveyor (BB6019-01) Page 8

▲ Rotary switches for setting trigger level and
delay time.
5.3 - ALARM RELAY
When using the Alarm relay output, the trigger level must
be set internally, together with a delay time. The rotary
switches are marked with numbers from 0 to 9 repre-
senting a specific value (see table below). The Alarm re-
lay is NC (normally closed) as default factory setting.
It is good practice always to set the internal trigger level
at the same level as that on the external system when
using the 4 -20 mA output. Doing so will ease the test
procedure and the maintenance of the system.
Position Trigger level, dB
0 54
1 59
2 64
3 69
4 74
5 79
6 84
7 89
8 94
9 99
Trigger level switch
The trigger level switch position and the corresponding
ultrasonic noise level values.
Position Delay time, seconds
0 0
1 10
2 15
3 20
4 30
5 45
6 60
7 120 (2 minutes)
8 240 (4 minutes)
9 480 (8 minutes)
Alarm delay switch
The alarm delay switch position and the corresponding
delay times. The delay must be at least 10 seconds.
5.4 - ERROR RELAY
In Error relay mode the Gassonic Surveyor will indicate
low supply voltage by deactivating the relay, swiching off
the user LED and flashing the communication LED. The
Error relay is always NC (normally closed).
The figure shows the jumper in the lower position (fac-
tory default setting) to provide Alarm relay functional-
ity. To choose Error relay function instead of Alarm relay
function, move the relay jumper to the upper position.
5.5 - NAMUR OR DRY CONTACT
The figure shows the two jumpers in the lower position
(factory default settings) to provide NAMUR output func-
tionality to either the Alarm or Error relay. To switch the
relay mode from NAMUR to dry contact move the two
jumpers as shown.
Installation and User Guide for Gassonic Surveyor (BB6019-01) Page 9

The Gassonic Surveyor is tested and calibrated as part
of the manufacturing process. However, prior to use, it
is good practice to calibrate and test the unit. This can
be done using the Gassonic 1701 test and calibration
unit.
Start any test and calibration procedure by clipping the
Gassonic 1701 onto the Gassonic Surveyor sensor head .
Lock the tool on the mounting bayonet by rotating it clock-
wise.
To activate the calibration mode of the
Gassonic Surveyor place the magnet stick
in the notch as illustrated.
The magnet stick is supplied
with the Gassonic 1701.
6.0 - TEST AND CALIBRATION
Installation and User Guide for Gassonic Surveyor (BB6019-01) Page 10

ACTION DISPLAY
Switch the Gassonic 1701 on. The version
number will display briefly. You must now se-
lect the detector type.
1
Select
type
BUTTON
Select “Gassonic Surveyor” by pressing
the Down button and then press Enter.
2
Use default filter 25 kHz by pressing the
Enter button.
Select test with the Down button.
3
4
BUTTON
Gassonic
Surveyor
Filter 25 kHz
Select
test
Select gain test by pressing the Enter button.
5
Test
gain
Activate the test by pressing the Enter button.
6
When the test is finished, the Gassonic 1701 beeps twice, and
shows a message, corresponding to the Gassonic Surveyor’s
internal settings. In this example the trigger level is 79 dB and
the rotary switch is in position 5. If the test is more than ± 3 dB
out of tolerance, perform calibration.
If the test was faulty the Gassonic 1701 beeps three times and
a No response message displays on the screen. Press Enter to
try again, or check the “Trouble shooting”-chapter
7
Activate
“TEST”
Meas: 79
Pos: 5
No response
7.0 - GAIN TEST PROCEDURE
Installation and User Guide for Gassonic Surveyor (BB6019-01) Page 11

Select the delay test by pressing the Enter
button. Test
delay
To test the internal delay, you must keep an
eye on the unit LED as it changes from con-
stant red to flashing red. To test the external
alarm delay time you must be in contact with
staff in the control room.
Press Enter when the LED flashes red. The
delay shows on the screen. If you use the
analog 4-20 mA output, press Enter when
the control room observes an alarm.
Activate
“TEST”
Delay on:
0:10
After a successful gain test, you must move on to the delay test. Please note that this test will trigger an alarm regard-
less of output mode (Alarm relay or 4-20 mA). You should be in contact with the staff in the fire and gas control room to
measure the delay time and to avoid causing a false alarm. When the control room observes an alarm, press ”ENTER” or
“TEST” to stop the test. The time read-out on the display corresponds to the alarm delay setting of the system. The user
interface LED will turn red when the test starts and then flash when the internal delay time has passed.
Switch the 1701 on. The version number will
display briefly. You must now select the sen-
sor type.
Select
type
Select “Gassonic Surveyor” by pressing the
Down button and then press Enter.
Use default filter 25 kHz by pressing the En-
ter button.
Select test with the Down button.
Gassonic
Surveyor
Filter 25 kHz
Select
test
8.0 - DELAY TEST PROCEDURE
ACTION DISPLAYBUTTON BUTTON
1
2
3
4
5
6
7
Installation and User Guide for Gassonic Surveyor (BB6019-01) Page 12

Switch the Gassonic 1701 tool on. The ver-
sion number will display briefly.You must now
select the sensor type.
Select
type
Select “Gassonic Surveyor” by pressing the
Down button and then press Enter.
Use default filter 25 kHz by pressing the En-
ter button.
Select test with the Down button.
Select the Gassonic Surveyor calibration by
pressing the Down button, and then press
Enter.
Gassonic
Surveyor
Filter 25 kHz
Select
test
Surveyor
Calibr.
A calibration can be performed at any time. Along with the Gassonic 1701, you will need the magnet-stick to set the
Gassonic Surveyor in calibration mode.
9.0 - CALIBRATION PROCEDURE
ACTION DISPLAYBUTTON BUTTON
1
2
3
4
5
Installation and User Guide for Gassonic Surveyor (BB6019-01) Page 13

6
7
8
9
10
Activate the test and calibration mode on
the Gassonic Surveyor with the enclosed
magnet-stick. Place the magnet-stick in the
magnet stick notch next to the interface LED
and hold it for more than 3 seconds.
> 3 SEC.
The interface LED will flash green and red to
indicate that the unit is now in test mode.
The test mode will time out after 60 sec of in-
activity and return to normal mode. You may
also return the Gassonic Surveyor to normal
service by placing the magnet stick in the
magnet stick notch again.
Activate the calibration by pressing Enter on
the Gassonic 1701. Activate
Calibr.
The calibration is carried out automatically,
and will stop when finished. The Gassonic
Surveyor LED turns green.
If the test was faulty the red LED on the Gassonic 1701 flashes
and the message “No response” is displayed on the screen. The
Gassonic Surveyor user LED will flash green for 5 seconds and
then the unit will return to normal operation. Check the chapter
“Trouble shooting” and try calibrating again.
Calibr.
complete
No response
ACTION
ACTION
DISPLAY
DISPLAY
BUTTON
Installation and User Guide for Gassonic Surveyor (BB6019-01) Page 14

ACTION DISPLAY
1
2
3
4
5
6
7
8
BUTTON BUTTON
Switch on the Gassoinc 1701. The version
number will display briefly. You must now se-
lect the sensor type.
Select
type
Select “Gassonic Surveyor” by pressing the
Down button and then press Enter. Gassonic
Surveyor
Use default filter 25 kHz by pressing the
Enter button. Filter 25 kHz
Select test with the Down button. Select
test
Select the step test by pressing the Enter
button. Step
test
The step test can be carried out to validate the 4-20 mA output to the control room. The test makes it possible to step
through different sound pressure levels. Note that this test might trigger an alarm if the sound level exceeds the trigger
level.
Push DOWN-button to decrease the test
sound level. 045 dB
When all levels are tested, push ENTER to
stop the step test. Step
test
Push UP-button to increase the test sound
level from 44 to 101 dB. 049 dB
10.0 - STEP TEST
Installation and User Guide for Gassonic Surveyor (BB6019-01) Page 15

The Gassonic Surveyor has two interface LEDs, which will flash red or green depending on the state of the unit.The LED on the front
of the unit indicates the current mode of the Gassonic Surveyor, and the LED next to the sensor head communicates with the test-
and calibration tool Gassonoc 1701. During service operations with the Gassonic 1701 the communication LED is not visible.
NORMAL OPERATION
Front LED Communication LED
Normal Operation Green Off
Voltage Error Off On
Internal Trigger level reached Red On
Internal Delay time elapsed Flashing Red On
SERVICE OPERATION
Calibration Mode Flashing Red and Green
Calibration Failure Flashing Green
Internal Delay time testing Red
Internal Delay time elapsed Flashing Red
When using the 4-20 mA and the relay in Error mode Imin=600 mW Unit in alarm. Relay energized
When using the 4-20 mA and the relay in Alarm mode Imin=500 mW Unit in alarm. Relay de-energized
When using only relay output in Alarm mode Imin=350 mW Unit in alarm. Relay de-energized
The unit can operate with a supply voltage of 9 to 28 Vdc. Power consumption patterns below are calculated with a 33%
safety factor, and with the minimum voltage of 9 Vdc.
If the calibration or gain test was faulty the Gassonic 1701 beeps three times and a No response message is displayed
on the screen.
• Check if there is dirt on the optical window between the 1701 and the Gassonic Surveyor.
• Check if there is dirt on the windscreen or on the microphone.
• Replace microphone if nessesary.
11.0 - GASSONIC SURVEYOR LED INTERFACE
12.0 - TROUBLE SHOOTING
13.0 - POWER CONSUMPTION
Installation and User Guide for Gassonic Surveyor (BB6019-01) Page 16

NORMAL OPERATION
Front LED Communication LED
Normal Operation Green Off
Voltage Error Off On
Internal Trigger level reached Red On
Internal Delay time elapsed Flashing Red On
SERVICE OPERATION
Calibration Mode Flashing Red and Green
Calibration Failure Flashing Green
Internal Delay time testing Red
Internal Delay time elapsed Flashing Red
10 15 20 25 30 35 40 45 50 55 60
28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6
Vdc
mA
(1.) 4-20mA with 500ohm load, Alarm Relay (De-energized), 101dB background noise, Unit in alarm (2.) 4-20mA with 500ohm load, Error Relay (Energized), 101dB background noise, Unit in alarm (3.) 4-20mA not connected Alarm Relay (De-energized), 101dB background noise, Unit in alarm (4.) 4-20mA not connected Alarm Relay (Energized), 101dB background noise, Unit in alarm
CHART1 - GASSONIC SURVEYOR MAXIMUM POWER CONSUMPTION
Installation and User Guide for Gassonic Surveyor (BB6019-01) Page 17

10 15 20 25 30 35 40 45 50 55 60
28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8
Vdc
mA
(5.) 4-20mA with 500ohm load, Alarm Relay (Energized), 44dB background noise, Unit not in alarm (6.) 4-20mA with 500ohm load, Alarm Relay (Energized), 64dB background noise, Unit not in alarm (7.) 4-20mA with 500ohm load, Alarm Relay (Energized), 84dB background noise, Unit not in alarm (8.) 4-20mA with 500ohm load, Alarm Relay (Energized), 94dB background noise, Unit not in alarm
CHART 2 - GASSONIC SURVEYOR NORMAL POWER CONSUMPTION
Installation and User Guide for Gassonic Surveyor (BB6019-01) Page 18

Safe area
Hazardous area
V+
GND
I_SOURCE
REL1
REL2
Gassonic Surveyor
Specification for the sum of
Pin 1, 3, 4 and 5
in respect to Pin 2:
Ui: 28V dc
Ii: 220mA dc
Pi: 950mW
Ci: 14nF
Li: 10µH
Minimum specification:
Supply voltage: 9 V.
Supply power: 600, mW.
(350 mW. with Io= 0mA)
Barriers / Isolators
This could be a number of
different barriers or isolator.
(see example drawings)
NB: When choosing barriers
or isolators ensure that
safety description is fulfilled.
5
4
3
2
1
U
Max.
500
U_SUP
24VDC
24VDC
0V
IS Earth
0V
U
Min.
5K6
0V
Safety description:
NB: Values given to I.S. parameters are the total sum of
inputs.
When input voltage is 28 Vdc the current can not
exceed 120 mA, and when the input current is equal to
220 mA Vdc the voltage must not exceed 17,5 Vdc.
Installation in accordance with 60079-14 and -25 or correspond-
ing local regulations and laws.
Power supply:
Ui= 28/17.3 Vdc
Ii= 120/220 mAdc
Pi= 950 mW
4-20mA source: output:
Uo= Ui
Io= Ii
Relay output:
Ui= 28/17.3 Vcd
Ii= 120/220 mAdc
Pi= 950 mW
Specific safety descriptions
Control room
Cabel param from En60079-14:
220 pF/meter
1 uH/meter or 30uH/ohm
Generic wiring diagram for Gassonic Surveyor. Connection data and example wiring diagrams of MTL and Peppel &
Fuchs barriers/isolators can be found in the Appendix. Any barriers/isolators can be used as long as their output safety
description does not exceed that of the Gassonic Surveyor. This product is designed to be installed according to IEC
Standard EN 60079-14.
Wire connectors on the unit are
individually marked for correct
wiring and reference.
14.0 - WIRING
Installation and User Guide for Gassonic Surveyor (BB6019-01) Page 19

General description
Detector type Ultrasonic Gas Leak
Detector for fixed
installations
Sensor technology Stainless steel Micro-
phone technology
Detector frequency range 25 kHz – 70 kHz
Dynamic range 44 dB – 104 dB SPL
Response time Instant
Detection coverage (leak
rate 0.1 kg/s)
5 - 20 meter radius
Power requirements (minimum)
When using 4-20mA and Relay output
Input Voltage 9 Vdc
Input Current 57 mA
Input Power 600 mW
When using relay output only
Input Voltage 9 Vdc
Input Current 39 mA
Input Power 350 mW
Safety description
Power supply
Ui 28 Vdc
Ii 220 mA
Pi 950 mW
Ci 14 nF
Li 10 µH
Output methods
Analogue interface
0 mA Low supply voltage/No power
3 mA Unit locally inhibit
4 - 20 mA 44 dB – 104 dB SPL
Relay (option 1 or 2 operator selectable)
Option 1 Alarm relay (switch on preset
trigger level)
Option 2 Error relay
NAMUR/dry contact (operator selectable)
NAMUR output
Normal (NC) 760Ω±1%
Alarm (NO) 10,422kΩ±1%
Environmental data
Operating
temperature
- 40 °C to + 75 °C
Humidity 0 to 100 % relative humidity
Ingress Protection IP66
Atmospheric
conditions
Normal air pressure and
oxygen content
Construction
Housing Stainless steel AISI 316L
Weight 2.24 kg
Vibration sensitivity
0.13 m/s² perpendicular to the membrane will trig-
ger the unit in the most sensitive range (44dB SPL)
Dimensions
182 x 145 mm
(7.2 x 5.7 inch)
Two gland/conduit
entries
M20 x 1.5
RF emission and immunity
Tested according to:
General
electrical safety
EN61010-1
RF emission EN61000-6-4
RF immunity EN61000-6-2
Certications
ATEX: II 2G EEx ia
IIC T4
IECEX: EEx ia IIC T4
SIL 1/2 rated
15.0 - TECHNICAL DATA
182 mm / 7.2 inch
145 mm / 5.7 inch
Installation and User Guide for Gassonic Surveyor (BB6019-01) Page 20