GasSecure GS01, GS01-EA User Manual
GasSecure GS01 and GS01-EA
Wireless Infrared Hydrocarbon
Gas Detector
User Manual
(For firmware version ≥ 3.5)
Document ID: 112464 Contact info
Release: 13 GasSecure AS
Version: 205 Hoffsveien 70 C
Doc. Status: APPROVED N-0377 Oslo
Last modified: 24/11/2020 Norway
www.gassecure.com
post@gassecure.com
GasSecure GS01
Hardware Manual
I
Note
Those who have or will have the responsibility for the operation or maintenance of
this product must carefully read this manual. The product may not perform as
designed if it is not used and maintained in accordance with the manufacturer’s
instructions.
Please read the complete manual and particularly note the paragraphs having an
exclamation mark in the margin.
This manual covers installation, operation and maintenance of the GS01 wireless
hydrocarbon detector and its battery pack.
The product warranty issued by GasSecure is voided if the product is not used and
maintained as described in this manual.
Please read also the safety instructions in Section 6.
© GasSecure AS, all rights reserved.
GasSecure GS01
Hardware Manual
II
PRODUCT DATA
Manufacturer GasSecure AS
Country of origin Norway
Models GS01, GS01-EA
Gases Hydrocarbons
Range Methane configuration 0 – 100% LEL
Range Propane configuration 0 – 80% LEL
Environmental conditions
Operating temperature -30oC to +55oC
Humidity 0 to 90% RH1 non-condensing
Pressure influence, 700 – 1300 hPa2 ≤ 0.15% of reading per hPa
(at 50% LEL)
Protection classification IP 66 and IP 67 3
Storage temperature -40oC to +65oC
Storage pressure 700 to 1300 hPa
Electrical
RF output power GS01 ≤ 12 dBm EIRP
RF output power GS01-EA ≤ 16 dBm EIRP
Battery type Lithium-Thionyl Chloride
Battery cells Tadiran SL-2780/S or TL-5930/S
Average power 5 mW
Explosion Protection II 2G Ex ib IIC T4 Gb -30oC to +55oC
Hazardous location temperature -40oC to +65oC
Gas performance temperature -30oC to +55oC
1
The manufacturer verified conditions are 0-100% RH and condensing.
2
Applies only for Methane configuration and outside the pressure range 850 – 1150 hPa: The
process value (PV) must be replaced with the adjusted process value PVadj. PVadj is calculated by
the controller with the measured atmospheric pressure as input according to
formula
( )
PVPV
p
p
adj
5.10−
=
, where p is the measured pressure and p0 is the standard
atmospheric pressure (101 kPa). Pressure p must be measured with +/-10 kPa accuracy.
3
IP ratings do not imply that the equipment will detect gas during exposure to those conditions.
GasSecure GS01
Hardware Manual
III
TABLE OF CONTENTS
1. PRODUCT DESCRIPTION ........................................................................................................5
1.1 GENERAL .................................................................................................................................5
1.2 MEASURING PRINCIPLE .............................................................................................................5
1.3 INSTRUMENT DESCRIPTION ........................................................................................................6
1.4 BATTERY ..................................................................................................................................6
1.5 OUTLINE DIMENSIONS ...............................................................................................................6
2. INSTALLATION .........................................................................................................................9
2.1 TOOLS .....................................................................................................................................9
2.2 MOUNTING ...............................................................................................................................9
2.3 GROUNDING .......................................................................................................................... 10
2.4 SUN SHADE / WEATHER PROTECTION ...................................................................................... 10
2.5 EXTERNAL ANTENNA (APPLIES ONLY FOR GS01-EA) ............................................................... 10
3. COMMISSIONING ................................................................................................................... 12
3.1 COMMUNICATION ................................................................................................................... 12
3.2 ISA100 WIRELESS™ STANDARD ............................................................................................ 12
3.3 ISA100 OBJECTS ................................................................................................................... 12
3.4 GS01 DATA FORMAT DETAILS ................................................................................................. 14
3.5 MODIFICATION OF LEL ........................................................................................................... 14
3.6 COMMUNICATION MONITORING ............................................................................................... 15
3.7 GS01 DETECTOR PROVISIONING ............................................................................................. 15
3.8 MODIFICATIONS TO AN EXISTING NETWORK ............................................................................. 18
3.9 VISUAL AND FUNCTIONAL CHECK ............................................................................................. 18
4. OPERATION ........................................................................................................................... 19
4.1 NORMAL OPERATION .............................................................................................................. 19
4.2 PROOF TEST (VALIDATION) ..................................................................................................... 19
5. MAINTENANCE ...................................................................................................................... 21
5.1 ROUTINE MAINTENANCE ......................................................................................................... 21
5.2 SPARE PARTS AND ACCESSORIES ........................................................................................... 21
5.3 CLEANING ............................................................................................................................. 22
5.4 BATTERY PACK ...................................................................................................................... 22
5.5 STORAGE .............................................................................................................................. 25
5.6 TROUBLESHOOTING ............................................................................................................... 26
5.7 CONTACT GASSECURE FOR SUPPORT .................................................................................... 27
6. SAFETY INSTRUCTIONS....................................................................................................... 28
7. CERTIFICATIONS AND STANDARDS .................................................................................. 29
7.1 STANDARDS .......................................................................................................................... 29
7.2 REGULATORY COMPLIANCE OF RADIO FOR GS01 .................................................................... 30
7.3 MARKING............................................................................................................................... 30
8. TECHNICAL DATA ................................................................................................................. 34
8.1 PERFORMANCE CHARACTERISTICS ......................................................................................... 34
8.2 CROSS SENSITIVITIES ............................................................................................................. 35
9. REFERENCES ........................................................................................................................ 37
10. APPENDIX .......................................................................................................................... 38
GasSecure GS01
Hardware Manual
IV
FIGURES
FIGURE 1-1: GS01 DETECTOR LAYOUT ............................................................................................................... 6
FIGURE 1-2: GS01 DETECTOR WITH DIMENSIONS IN [MM] .................................................................................. 7
FIGURE 1-3: GS01-EA DETECTOR WITH DIMENSIONS IN [MM] ............................................................................ 8
FIGURE 1-4: GS01 MEASURING CELL DETAILS ................................................................................................ .... 8
FIGURE 2-1: CORRECT POSITION OF THE WEATHER CAP AND LOCATION OF EARTH POINT. ................................ 10
FIGURE 2-2: GS01-EA LAYOUT WITH ANTENNA CONNECTIONS ........................................................................ 11
FIGURE 3-1: GS01 CONFIGURATOR .................................................................................................................. 17
FIGURE 5-1: BATTERY PACK WARNING LABEL .................................................................................................. 23
FIGURE 5-2: BATTERY PACK BOTTOM VIEW. CORRECT CONNECTION OF THE MULTIMETER. ............................. 24
FIGURE 5-3: BATTERY PACK TOP AND BOTTOM ................................................................................................ 24
FIGURE 7-1: GS01 PRODUCT IDENTIFICATION PLATE ........................................................................................ 30
FIGURE 7-2: GS01-EA PRODUCT IDENTIFICATION PLATE ................................................................................. 31
FIGURE 7-3: GS01 PRODUCT IDENTIFICATION PLATE – FM APPROVED ............................................................. 31
FIGURE 7-4: GS01-EA PRODUCT IDENTIFICATION PLATE – FM APPROVED ...................................................... 31
FIGURE 7-5: FCC COMPLIANCE LABEL .............................................................................................................. 32
FIGURE 7-6: BATTERY PACK IDENTIFICATION LABEL (FM APPROVED VERSION TO THE RIGHT) ........................ 33
FIGURE 7-7: ANTENNA IDENTIFICATION LABEL (FM APPROVED VERSION TO THE RIGHT) ................................. 33
FIGURE 10-1 EU DECLARATION OF CONFORMITY FOR GS01 AND GS01-EA .................................................... 41
FIGURE 10-2: EU DECLARATION OF CONFORMITY FOR GS01 AND GS01-EA – FM APPROVED ........................ 42
TABLES
TABLE 2-1: PROPERTIES OF STANDARD ANTENNA CABLE FOR THE GS01-EA ................................................... 11
TABLE 3-1: ISA100 OBJECTS ............................................................................................................................ 13
TABLE 3-2: LEL VALUES IN [% VOL] ACCORDING TO IEC AND NIOSH ........................................................... 15
TABLE 3-3: PV GAS MEASUREMENT DATA INTEGRITY ...................................................................................... 15
TABLE 4-1: RECOMMENDED GAS CONCENTRATIONS FOR VALIDATION ............................................................. 20
TABLE 5-1: IMPORTANT SPARE PARTS AND ACCESSORIES FOR THE GS01 ......................................................... 21
TABLE 5-2: STATUS MESSAGES RETRIEVED FROM THE DIAG_STATUS ATTRIBUTE............................................ 26
TABLE 7-1: LIST OF APPLICABLE STANDARDS FOR THE GS01 ........................................................................... 29
TABLE 8-1: PERFORMANCE CHARACTERISTICS FOR THE GS01 ......................................................................... 34
TABLE 8-2: LEL VALUES IN [% VOL] ACCORDING TO IEC60079-20. ................................................................ 35
TABLE 8-3: CROSS SENSITIVITIES FOR A GS01 METHANE DETECTOR. .............................................................. 35
TABLE 8-4: CROSS SENSITIVITIES FOR A GS01 PROPANE DETECTOR. ............................................................... 35
TABLE 8-5: LEL VALUES IN [% VOL] ACCORDING TO NIOSH. ................................................................ ......... 36
TABLE 8-6: CROSS SENSITIVITIES FOR A GS01 METHANE DETECTOR. .............................................................. 36
TABLE 8-7: CROSS SENSITIVITIES FOR A GS01 PROPANE DETECTOR. ............................................................... 36
TABLE 10-1: PV_STATUS BYTE DESCRIPTION ACCORDING TO ISA100 WIRELESS™ STANDARD ...................... 38
TABLE 10-2: CONTENT OF THE DIAG_STATUS ATTRIBUTE ........................................................................... 38
GasSecure GS01
Hardware Manual
DESCRIPTION
5
1. PRODUCT DESCRIPTION
1.1 General
The GS01 is a wireless, battery powered point detector that monitors the
concentration of hydrocarbon gases.
It uses a combination of two sensors:
1. An ultrasonic speed-of-sound sensor that continuously monitors changes in
the ambient air composition.
2. An optical (infrared) absorption sensor that is used for accurate
measurements of the hydrocarbon gas concentration.
The infrared sensor uses more power than the ultrasonic and is therefore kept in
watch mode if the ultrasonic sensor does not detect any changes in the air
composition. The infrared sensor applies optical MEMS (micro electromechanical
system) technology to enable intermittent operation with fast start-up and
measurement, and thus very low average battery consumption.
The measured gas concentration is transmitted wireless using the ISA100
Wireless™ standard. This manual does not cover the wireless router or gateway
and the connected control system (please refer to the list of references in Section
9 providing examples of relevant documentation).
The detector is intrinsically safe, with equipment protection level Gb (Ex ib) (see
Section 7) intended for use in zone 1 and 2 areas.
Two models are available of this gas detector:
- GS01 with fixed antenna
- GS01-EA with extended antenna
All information in this manual for the GS01 also applies for the GS01-EA unless
explicitly otherwise noted.
1.2 Measuring principle
The GS01 detector utilises infrared absorption spectroscopy. The fundament is the
Beer-Lambert Law, which relates the absorption of light to the properties of the
material through which the light is travelling.
The internal radiation source emits infrared radiation through a lens and a
sapphire window into the measuring cell (cf. Figure 1-1 and Figure 1-4). A mirror at
the opposite end of this cell returns the beam back through the sapphire window
into the internal volume of the detector and onto a filter that disperses, focuses,
and modulates the incident light. This filter is a patented silicon MEMS component
proprietary to GasSecure.
By applying a control voltage to the MEMS chip it is switched between the socalled gas state and the reference state. In the gas state a wavelength where
hydrocarbons do absorb light is focused onto the detector, whereas two
GasSecure GS01
Hardware Manual
6 CHAPTER 1
wavelengths where hydrocarbons do not absorb are focused onto the detector in
the reference state. The GS01 detector uses the same light source, light path and
photodetector for both measurements.
This single beam, triple wavelength detection is unique to the GS01 from
GasSecure.
1.3 Instrument description
The GS01 consists of the main housing (316L stainless steel) with mounting
bracket, the measuring cell, an antenna (note that the GS01-EA features an
antenna connector instead), and the battery compartment (cf. Figure 1-1).
Attached to the main housing are the following detachable parts:
• Weather cap (Polyamide 6)
• Battery cap (Polyamide 6)
• Battery package (Polyamide 6)
Except for these detachable parts, the user shall not disassemble the sensor any
further. When the weather cap is removed, the infrared measuring cell with the
sapphire window on the main housing and the mirror at the outer end, is open and
accessible for cleaning. The ultrasonic sensor is protected by a perforated steel
sheet, which shall not be removed.
1.4 Battery
The GS01 may only be used with the GasSecure battery pack (Part number
10055). The battery pack is designed for two Lithium-Thionyl Chloride size D cells
in series, and has a nominal output voltage of 7.2V. The battery pack has an
internal charge counter. The battery pack is intrinsically safe (see Section 7).
1.5 Outline dimensions
Figure 1-1 shows the sensor buildup with an exploded drawing. Figure 1-2 and
Figure 1-3 depict the GS01 and GS01-EA dimensions, respectively.
Figure 1-1: GS01 detector layout
with A) Weather cap, B) Measuring cell, C) Mounting bracket, D) Antenna, E)
Stainless steel housing, F) Battery compartment, G) Battery pack, H) Battery cap
GasSecure GS01
Hardware Manual
DESCRIPTION
7
Figure 1-2: GS01 detector with dimensions in [mm]
GasSecure GS01
Hardware Manual
8 CHAPTER 1
Figure 1-3: GS01-EA detector with dimensions in [mm]
Figure 1-4: GS01 measuring cell details
showing A) External mirror, B) Infrared beam path, C) Sapphire window, D)
Ultrasonic sensor with protective sheet
GasSecure GS01
Hardware Manual
INSTALLATION
9
2. INSTALLATION
Note: The GS01 gas detector certification must comply with the legal requirements
following the area classification at the installation point.
The detector shall be installed where it is most likely to detect gas in the event of a
leakage.
For battery pack installation see Section 5.4.
In areas with significant exposure to direct sunlight and the risk of temperatures
beyond the operating temperature range, a sunshade should be considered (see
list of spare parts in Table 5-1).
2.1 Tools
The following tools are needed to install the instrument:
• Open-end spanner for M8 bolts (alternatively 5/16” bolts)
• Face spanner with two pins in size 75x6 (distance x pin diameter) as
optional tool to remove the battery cap
• Torx screwdriver T10 for battery cell replacement (cf. Section 5.4.2)
2.2 Mounting
The detector is mounted with its long axis horizontally. For the standard GS01
make sure, to the extent possible, that the antenna is vertical (pointing up or down)
and that local radio shadowing is kept at a minimum. The GS01-EA may be
mounted in any horizontal orientation.
Two M8 bolts (alternatively 5/16” bolts) with washers under the head are used to
attach the bracket. The bolts should be spaced from 85 to 95 mm to easily fit the
slots when mounting the detector.
The weather cap must be mounted with the arrow on the cap pointing upwards,
regardless if the antenna is pointing up or down (cf. Figure 2-1). If possible, mount
the GS01 with the weather cap oriented away from the prevailing wind direction.
Do not use the GS01 detector in ventilation ducts or pipes.
Do not mount the detector directly above hot or cold surfaces. If the detector is
mounted inside metallic structures or enclosures the GS01 detector with extended
antenna (GS01-EA) should be considered.
GasSecure GS01
Hardware Manual
10 CHAPTER 2
2.3 Grounding
The detector housing must be connected to ground for operation in hazardous
areas. This to avoid possible static charge build-up, which may arise from
electrically isolated metal parts. Ground the detector either by mounting it on a
grounded metallic structure or by connecting a grounded wire to the screw holes in
the mounting bracket (cf. Figure 2-1).The resistance to ground must be less than 1
GOhm.
2.4 Sun shade / weather protection
The sunshade is available as optional accessory and recommended for locations
with high ambient temperature and / or direct sunlight exposure. It may also be
used as weather protection for instance in locations with frequent heavy
precipitation. The shade is fixed to the gas detector bracket with the same M8 (or
5/16”) bolts, which are used for detector mounting. Make sure that the sunshade is
mounted the correct way so that the detector identification plate remains visible.
Figure 2-1: Correct position of the weather cap and location of earth point.
The arrow must always point up regardless of the detector orientation.
2.5 External antenna (applies only for GS01-EA)
The external antenna is connected to the detector housing directly or with the
antenna cable as shown in Figure 2-2. Tighten the antenna or the cable hand-tight
in both ends (approximate torque of 2-3 Nm). The properties of the antenna cable
supplied by GasSecure are shown in Table 2-1. The GS01-EA detector is certified
with the coaxial cable and the omni-directional antenna in Table 5-1. Note that the
approved cable length range is 0-30 m. Do not connect any other antennas than
those listed in Table 5-1.
External
earth point
GasSecure GS01
Hardware Manual
INSTALLATION
11
Some external antennae are delivered with a bracket (refer to Reference [7] for
bracket dimensions) and metal bands for easy fitting to a pole (25 – 101 mm) or
similar. Make sure, to the extent possible, that the antenna is mounted vertical
(pointing up or down) and that local radio shadowing is kept at a minimum. Please
read also the safety instructions in Section 6.
Table 2-1: Properties of standard antenna cable for the GS01-EA
Loss/m at 2.5 GHz
[dB]
Diameter
[mm]
Bend radius
[mm]
Weight per m
[g]
0.21
10.3
100
115
Figure 2-2: GS01-EA layout with antenna connections
Omni-directional antenna
N-type connector
Antenna cable
Housing
N-type connector
GasSecure GS01
Hardware Manual
12 CHAPTER 3
3. COMMISSIONING
The GS01 detector(s) is (are) set up in a wireless sensor network with a gateway
and router. The exact commissioning procedure depends on the selected type of
gateway. Therefore, this manual must be used together with the relevant
documentation written for the respective gateway. Some references for such
documentation are provided in Section 9.
On completion of commissioning, the proof test, as described in Section 4.2,
should be executed to validate the correct mapping of the detector output data.
3.1 Communication
The GS01 detector complies with the ISA100 Wireless™ standard for wireless
communication.
Each GS01 detector must be paired with a single gateway, before it can
communicate with the network. The gateway is the interface between the wireless
and plant networks. It marks the transition between communications compliant to
the standard and other communications, and acts as a translator between ISA100
Wireless™ and other protocols (Modbus, PROFINET, etc.).
The pairing process, where the device obtains the appropriate security credentials
and network-specific information, is referred to as provisioning and is explained in
Section 3.7.
3.2 ISA100 Wireless™ standard
ISA100 Wireless™ is a wireless networking technology standard developed by the
International Society of Automation (ISA).
This ISA standard is intended to provide reliable and secure wireless operation for
safety, control, and monitoring applications. This standard defines the protocol
suite, system management, gateway, and security specifications for low-data-rate
wireless connectivity with fixed, portable, and moving field devices supporting very
limited power consumption requirements. The application focus is to address the
performance needs for periodic monitoring and process control where latencies on
the order of 100 ms can be tolerated with optional behaviour for shorter latency.
3.3 ISA100 objects
ISA100.11a defines a communication protocol, with an application layer that
includes a simple but extensible set of input and output objects.
The GS01 detector publishes the measured values and diagnostic information as
ISA100 objects with attributes. It is distinguished between standard attributes and
GS01 device specific attributes.
3.3.1 Standard objects
The GS01 publishes ISA100 standard objects with attributes for process value and
diagnostic status as outlined in Table 3-1 below. The gas measurement value is
Loading...