Bieler+Lang ExDetector HC 150 User manual

Gas Detection and Warning Systems
Operating and
Installation Instructions
ExDetector HC 150
ExDetector HC 150-K

Page 2 Technical Status: 11/2010
Gas Detector
Operating and Installation Instructions
ExDetector HC 150 / HC 150-K
Prerequisites for safe operation of the system:
●Appropriate transport and handling
●Appropriate installation and commissioning by suitably qualified personnel
(e.g. a qualified electrician)
●Observance of the data sheet, the operating instructions and relevant
safety regulations, e.g.:
-Explosion Protection Regulation (ExVo)
-Explosion Protection Rules (BGR 104)
-BGV B 6 Gases
●Use only in areas where there is a potenial explosion hazard and an
oxygen concentration of not more than 20.9 vol. %
Important Instructions
●Avoid external influences such as waves of water, oil etc., and exposure to
causes of mechanical damage.
●Observe the air flow situation! Always place the sensor head in an air flow
between a potential release or collection point and a possible ignition
source.
●Consider the density of the gas! For gases with a lower density than air, for
example methane, the detector must be located above a possible leakage
point, or at the highest point at which the gas can collect. When monitoring
gases and vapours that have a higher density than air, the detector must,
accordingly, be positioned at the lowest point, or near a potential leakage
point.
●Install the detector in a location where there is low vibration, and where the
temperature is as stable as possible.
●Ensure that there is adequate space for maintenance of the detector.
Installation
Follow the prescribed specifications for cables and connections. It is important
that the cable does not pass close to a source of electromagnetic interference.
Compliance with the limits specified in standards relevant for the CE-symbol is
only assured with proper use and electromagnetically-compatible installation
of the system.
Installation Notes
74 mm
74 mm
ExDetector HC 150
10 cm Wartungsfreiheit

Technical Status: 11/2010 Page 3
Gas Detector
Operating and Installation Instructions
ExDetector HC 150 / HC 150-K
Connections
●Max. lead length: 1000 m
●Max. lead resistance: 12 ohm per conductor
Important Instructions
Never open the ExDetector housing in the presence of an explosive
atmosphere.
Terminal Assignment
●Max. outside diameter of cable: 10 mm
●Three-core cable with screen
●Terminal assignment
24VDC
4-20 mA
GND
0,4-2V
Br
N
VBr
4
5
6
1
2
3
KL 1
KL 2
KL 3
KL 4
KL 5
KL 6
power supply +24VDC SELV/PELV
output 4 ... 20 mA
GND
Sensor
Sensor
Sensor
Please note (when used without a Bieler + Lang evaluator):
the power supply at KL 1 must be within the safe limits and have a
100 mA/T series fuse.

Page 4 Technical Status: 11/2010
Gas Detector
Operating and Installation Instructions
ExDetector HC 150 / HC 150-K
Connections
Potential Equalisation The detector housing must be connected to the equipotential bonding of
the explosion hazard zone.
In addition, valid national installation regulations must be observed. The
following regulations were valid in Germany at the time of going to press:
●ElexV Regulations covering electrical installations in areas where there is
an explosion hazard
●DIN VDE 0165 / 2.91 Installation of electrical apparatus in areas where
there is an explosion hazard
●Ex-RL Rules for avoiding dangers from a potentially explosive atmosphere
with a collection of examples - Explosion Protection Rules
Example: Connection to GMC8022
Screening The screen is to be connected to the detector housing by means of the
cable gland. Connect the screen as shown in the diagram.
●The screen conductor must be connected to the equipotential bonding of
the area where there is an explosion hazard.
Commissioning ●Switch on the evaluation unit (power supply).
●After 30 minutes warm-up time, check operation of the detector / evaluator
combination with test gas.
Evaluation
instrument
Safe area Hazardous area
Voltage equalisation point
ExDetector
HC 150
KL 1+24VDC KL 2
4...20mA KL 3
GND
Detector-
elektronic KL 1 +24VDC
KL 2 4...20mA
KL 3 GND
GMC
8022
Zone 2 safe area

Technical Status: 11/2010 Page 5
Gas Detector
Operating and Installation Instructions
ExDetector HC 150 / HC 150-K
Adjustment Important note!
The relevant regulations for work in areas where there is an explosion
hazard must be observed without fail.
The following accessories and equipment are required:
●Voltmeter
●Test gas set consisting of:
- 1 x Minican of test gas (e.g. 40% LEL)
- 1 x Minican of synthetic air
- Pressure regulator unit with regulating valve and flow meter.
- Test gas cap (see Accessories)
- Measurement leads (see Accessories)
Adjustment
●Remove the cover from the housing.
Important: before opening make sure that an explosive atmosphere is not
present.
●Fit test-gas cap to the sensor.
●The flow rate of the two gases should be 10 to 15 l/h (second graduation).
Setting the bridge voltage
●Apply zero-response gas (synthetic air) if the environment contains the gas
to be detected.
●Connect the voltmeter at the measurement socket „Br“.
●Wait for the voltage reading to stabilise.
●Adjust the „Br“ potentiometer until the voltmeter reads 0 mV.
Setting the base current to 4 mA
●Connect the voltmeter at the „0.4-2V“ socket.
●Wait for the „0.4-2V“ voltage signal to stabilise.
●Adjust the „N“ potentiometer until the voltmeter reading is 400 mV (4 mA).
Setting the 4-20 mA output current
●Apply test gas of a known concentration C1.
●Wait for the „0.4-2V“ voltage signal to stabilise.
●Adjust the „V“ potentiometer until the voltage corresponds to the value US
U = 0,4V +1,6V
s C
Cmax
1
C = testgas concentration in % LEL
1
max
C = Measuring range (100%LEL)
U = Signal voltage
s
24VDC
4-20 mA
GND
0,4-2V
Br
N
VBr
4
5
6
1
2
3
Measuring the sensitivity (bridge voltage)
●Connect the voltmeter at the measurement socket „Br“.
●Note the voltage reading UBr in mV.
●Remove the test gas.
●Write a test report.
Testing sensor sensitivity E:
●Calculate E using the following formula:
UBR = bridge voltage
C1= known test gas concentration
●If sensor sensitivity E < 0.5, the sensor must be replaced.
●If sensor sensitivity E is below 50% of the E value from initial adjustment
(works calibration), the sensor also must be replaced.
E = UBR (mV)
C1(%UEG)

Page 6 Technical Status: 11/2010
Gas Detector
Operating and Installation Instructions
ExDetector HC 150 / HC 150-K
0,4-2V
Br
N
VBr
4
5
6
Replacing the Sensor Please note:
Sensors may only be replaced by specialist personnel authorised to do so by
Bieler+Lang. Do not open the housing when the power supply is switched on!
locknut
seal ring
sensor
Procedure:
●Switch off the power supply to the detector
●Remove the housing cover
●Disconnect the leads from terminals 4, 5 and 6
●Undo the locknut
●Unscrew the sensor
●Screw the replacement sensor in.
Make sure the sealing ring is correctly seated.
●Screw the locknut on (serrations towards the housing wall)
●Connect the leads according to their markings
●Replace the housing cover
●Switch on the power supply
●Calibrate the detector
Spare Parts ●Replacement sensor for ExDetector HC 150 D1
●Replacement sensor for ExDetector HC 150-K D1

Technical Status: 11/2010 Page 7
Gas Detector
Operating and Installation Instructions
ExDetector HC 150 / HC 150-K
Regular maintenance ensures the safety and longterm reliability of your gas
warning installation. For this reason it is absolutely essential that the system is
checked at regular intervals. We therefore strongly recommend that you
conclude an installation-specific maintenance contract with us.
Maintenance Instructions
At least once a year the condition (correct operation) of a gas warning
installation must be checked by a qualified person (§8 and §53; BGV 61 UVV
Gases). Before commissioning and at appropriate intervals the gas warning
installation is to be checked by an expert (§56; BGV 61, UVV Gases).
In addition the requirements of BG-Bulletin T023 (BGI 518), Gas warning
devices for explosion protection - selection and operation, must be observed.
Further relevant standards:
●DIN EN 60079-14 Electrical apparatus for explosive gas atmospheres -
Electrical installations, design selection and erection
●DIN EN 60079-17 Electrical apparatus for explosive gas atmospheres -
Electrical installations, inspection and maintenance.
●DIN EN 60079-29-2 Explosive atmospheres - Part 29-2:
Gas detectors - Selection, installation, use and maintenance of detectors
for flammable gases and oxygen
Accessories ●Test gas set
●Calibration gases
●Measurement lead
For all deliveries the general delivery conditions for products and services of
the electrical industry apply.
There is a guarantee on all parts for two years from the delivery date or from
the date of commissioning for the first time by our customer service or by our
representative, with the exception of of parts subject to wear (e.g. sensors).
In particular, please note that in the event of improper operation the right to
notify material defects is forfeited. The time limit for notifying claims for material
defects is 12 months.
Guarantee

Page 8 Technical Status: 11/2010
Gas Detector
Operating and Installation Instructions
ExDetector HC 150 / HC 150-K
Bieler + Lang GmbH
Gas Detection and Warning Systems
PO Box 1129, D-77842 Achern
Oberkirchstr. 19-21, D-77855 Achern
Telephone [phone] / 69 37 - 0
Telefax +49 (0) 78 41 / 69 37 - 99
E-mail [email protected]
Internet www.bieler-lang.de We reserve the right to make technical changes!