Axel Semrau ODOR easy User manual
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Version 10/2017
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Contents
1 Introduction
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1.1 Intended use
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1.2 Safety instructions
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1.3 Installation requirements
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1.3.1 Dimensions
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1.3.2 Electrical connections
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1.3.3 Gas connections
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1.3.4 Ambient conditions
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1.3.5 Remote transmission
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1.3.6 Information concerning the delivery of the system
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2 Scope of delivery for ODOR EASY
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2.1 Other accessories
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3 Connecting the system
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3.1 Gas connections
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3.2 Electrical connections
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3.2.1 Connecting the supply voltage
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3.2.2 Signal output
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3.2.3 Connecting a PC/laptop/tablet to the ODOR EASY
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4 Commissioning
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4.1 Setting the gas flows
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4.1.1 Gas connections
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4.1.2 Opening HyperTerminal
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4.1.3 Opening the valves and setting the gas flows
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4.2 Setting the calibration gas concentration
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4.2.1 Opening HyperTerminal
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4.2.2 Calibration gas input
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4.3 Starting the test measurement
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4.3.1 Opening HyperTerminal
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4.3.2 Opening the measuring menu
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4.4 Testing the analogue output signal
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4.4.1 Opening HyperTerminal
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4.4.2 Opening the DAC menu
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5 Settings
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5.1 Connection parameters
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5.2 Firmware
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5.2.1 Service menu
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5.2.2 Valve menu
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5.2.3 Sensor menu
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5.2.4 DAC menu
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5.2.5 Clock menu
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5.2.6 EEPROM data
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5.2.7 Measure menu
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6 Changing the calibration gas cylinder
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7 Changing the sensor
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8 Power failure
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9 Visual checks
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10 Error messages
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11 Technical data
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11.1 General requirements
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11.2 Electrical requirements
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11.3 Mechanical requirements
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11.4 Ambient conditions
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11.5 Software/firmware
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11.6 Measurement area
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11.7 Measuring frequency
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11.8 Safety
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12 Disposal
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13 Appendix
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13.1 Setting the sensor type and the gain
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13.2 Setting the offset voltages
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13.3 Setting up the USB interface by Hyperterminal
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13.4 Data Logging
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13.5 Updating the firmware
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1Introduction
1.1 Intended use
Dear Customer,
The ODOR easy is a device for the detection of sulphurous odorants in low pressure applications up to
2 bar that has been designed with special attention to automated measurement.
Typical odorants are:
Tetrahydrothiophene (THT)
Tertiary butyl mercaptan (TBM)
Ethyl mercaptan (EM)
Mixtures of mercaptan and/or sulphides (Scentinel™ E, Spotleak™ 1004, Captan™)
The device is not certified for use in areas with potentially explosive atmospheres and may only be used
for monitoring sulphurous odorants and odorant mixtures in natural gas, biogas and liquefied gas in
areas that are not subject to explosion hazards. The operating company must ensure that the operating
location is sufficiently ventilated. The device is not explosion protected and must not be operated in
such areas.
Yours AXEL SEMRAU GmbH & Co. KG
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1.2 Safety instructions
Symbols and signal words are used to call your attention to the usage and potential consequences of
safety information.
DANGER Calls your attention to a dangerous situation
that will result in serious injury or death
if it is not avoided.
WARNING Calls your attention to a dangerous situation
that could result in serious injury or death
if it is not avoided.
CAUTION Calls your attention to a dangerous situation
that could result in minor to moderate injury
if it is not avoided.
NOTICE: Calls your attention to potential material damage
and other important information.
1.3 Installation requirements
The manual contains all the information concerning the controls, usage, maintenance and adjustment of
the device, as well as all the technical data. The operating manual is an integral part of the ODOR EASY.
You should therefore keep the manual close at hand so that it is readily accessible for the necessary
information.
Read the operating manual carefully. The manual must be understood and followed in all respects by
those people who are responsible for the installation, operation and maintenance of the devices.
The place of use must be sufficiently dry. There is no protection against moisture or dripping water. The
service life of the electrochemical sensor is reduced by overheating, so the ODOR easy should be
protected from direct sunlight. A voltage supply of 115V/230V, 50Hz/60Hz AC is needed for operation.
Conversion to a 12 V DC voltage supply is possible. The measured value is output using a 4-20 mA
current interface.
The current interface is not electrically isolated, hence there is a connection to the internal earth of the
device. Incorrect connection could result in damage to the device.
The ODOR easy is supplied ready for use with an electrochemical sensor for the detection of THT or
mercaptans.
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Fig. 1: ODOR easy system overview
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1.3.1 Dimensions
ODOR easy 270 x 240 x 90 mm
ODOR easy with rotameter 450 x 240 x 90 mm
Weight of ODOR easy: approx. 3.7 kg
We recommend wall mounting out of direct sunlight in order to prevent overheating.
A suitable holder for the gas bottles must be present immediately adjacent to the device. (Calibration
gas bottle with 10 l capacity: Height 110cm; diameter 16cm; 30cm wide incl. pressure reducer)
1.3.2 Electrical connections
ODOR easy: 110/240V AC 50/60Hz, max. 24W, conversion to 12 V DC possible
The power supply does not need to be backed up by a UPS. The device has a restart function that
activates following a power failure.
1.3.3 Gas connections
Natural gas
Natural gas line with shut off valve (Pressure 20 mbar to max. 2 bar constant +/-10%, approx. 20 l/h).
The device is supplied with 6 mm or ¼” Swagelok
®¯° ±²²³´µ
. Please provide corresponding piping.
If the sampling point is far away from the device, a higher outflow may be required by using a bypass.
Calibration gas:
The calibration gas (approx. 1 bar, max. 2 bar, approx. 20 l/h) is a mixture of the odorant in nitrogen N2.
The calibration gas connection is supplied with 1/8” Swagelok
®¯° ±²²³´µ
. The calibration gas must
contain the substances (odorant) that are to be quantified. The concentration should correspond to the
concentration for which the highest measuring accuracy is desired.
Example mixture for THT measurement: 15 mg/m³ tetrahydrothiophene in nitrogen
Example mixture for mercaptan measurement: 9 mg/m³ Scentinel E®in nitrogen
The calibration gas should be in close proximity to the device so as to keep the purging times and hence
the calibration gas consumption low. 1/8” PFA hose should be used as the material for the supply line.
The pressure reduction unit should have a low dead volume and low adsorption for sulphur compounds.
Exhaust gas:
Exhaust line to open air (throughput approx. 20 l/h during measurement). The device is supplied with 6
mm or ¼” Swagelok
®¯° ±²²³´µ
. Corresponding gas lines must be provided.
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1.3.4 Ambient conditions
Outside the Ex zone (e.g. electrical equipment room)
Temperature range: 0 - 40°C
Relative humidity: 10-90%, no condensation
DANGER The device is not explosion protected and must not be operated in such areas.
The place of use must be sufficiently dry. There is no protection against
moisture or dripping water.
1.3.5 Remote transmission
Output: 4-20mA (not electrically isolated)
DANGER The current interface is not electrically isolated, hence there is a connection to
the internal earth of the device. Incorrect connection could result in damage to
the device.
1.3.6 Information concerning the delivery of the system
The system is normally delivered by a shipping company. It is important to note a few things on
accepting delivery of the system so that no problems arise due to any damage that may have occurred
during transit.
The delivered goods should be checked to ensure that:
¶
they are complete
¶
the packaging is externally intact
¶
they are in perfect condition
Please inform us immediately in writing by fax and by telephone if acceptance is refused.
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2Scope of delivery for ODOR EASY
ODOR easy basic unit with THT or mercaptan sensor for detection of the odorant.
USB storage medium with HyperTerminal software.
2.1 Other accessories
Mains cable
USB cable type B
Rotameter for setting the flow rate for the sample gas and the calibration gas
Additionally required material:
These items can be ordered direct for ODOR EASY from AS.
Calibration gas: The concentration of all substances to be measured in N2should be close to
the concentration in the sample gas to be analysed.
Low absorption pressure reducer
PC/laptop/tablet: Minimum configuration:
One free USB port
Windows 7/8/10 operating system
Connection lines: 6 mm, 1/4” or 1/8”, other tube fittings on request
NOTICE: Please use PTFE or PFA lines for the calibration gas so as to avoid adsorption
of the gas.
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3Connecting the system
The cover must be removed in order to connect the device.
DANGER Installation and commissioning must only be performed by trained personnel.
Connections to gas lines and electrical connections need to be established.
Fig. 2: Interior view of ODOR easy
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Fig. 3: Connector panel of ODOR easy
Status LED
The ODOR easy has 4 status LEDs:
live: flashing green; device is waiting for the
next action
calibration: continuous green; device is calibrating
with test gas
measuring: continuous yellow; device is measuring
the sample gas
error: continuous red; an error has occurred
Fig. 4: Status LED
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3.1 Gas connections
DANGER
Setting higher gas pressures could result in the release of flammable
gases.
The gas lines (sample gas, calibration gas and gas/air out) are
connected using a compression fitting. The manufacturer's
instructions for the compression fittings must be followed. The
respective inlet pressures must be observed.
Make the following connections:
1.) Connection of GAS / AIR OUT to the exhaust line (not
pressurised), 6 mm or ¼” tube fittings.
2.) Connection of SAMPLE GAS to the natural gas line
(minimum 22 mbar, maximum 2 bar, throughput 20 l/h). The
ODOR easy can be ordered either with or without an optional
rotameter. If a rotameter has not been ordered, all gas
connections are present in either 6 mm or 1/4
” tube fittings
on
the underside of the device. There is no need to use a rotameter
to set the flow rate when using a pressure of 22 mbar, and the
gas may be connected directly to the ODOR easy using the
screw fitting. For higher pressures, a rotameter must be used.
The inlet to the rotameter can be designed to accept either a 6
mm or 1/4
”
line. Setting the gas flows is covered in Section 4.1.
3.) Connection of CALIBRATION GAS to the pressure
reducer for the calibration gas bottle (maximum pressure 2 bar,
throughput 20 l/h). The inlet to the rotameter is designed to
accept a 1/8
”
PTFE or PFA line.
Fig. 5: Front panel of rotameter
Fig. 6: Back panel of rotameter
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3.2 Electrical connections
The ODOR easy can be supplied with or without a mains cable. If the mains connection and the
connection to the signal output are to be made on site, the cover of the electronics housing must be
removed (see Fig. 2) by undoing two nuts on the housing and then pushing it upwards and out of the
guide.
3.2.1 Connecting the supply voltage
CAUTION
The electrical wiring is freely
accessible after opening the electronics housing.
DANGER Installation and commissioning must
only be performed by trained personnel.
The ODOR easy can be ordered with or without a mains cable.
Hence the power supply cable may also be attached directly to
the power supply unit.
The device can be supplied with 110V - 240V AC 50 / 60 Hz.
The connection is made directly to the power supply unit and to
the grounding pin on the floor of the housing. The cable
grommet must be securely tightened in order to provide
adequate strain relief.
Fig. 7: Internal power connection
3.2.2 Signal output
The active 4-20 mA interface is able to drive a load resistance of 0 to 500 ohms. The relation to the
measuring result is set through the parameters in the firmware. In the event of an error message, the
current output falls to 0 mA until a correct calibration/measurement is performed again.
The signal is output via a 3-pin connector on the mainboard. Incorrect connection could result in
destruction of the device.
Pin Signal
Fig. 8: 4-20 mA signal output
1 Plus
2 Minus (device earth!)
3 Not used
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3.2.3 Connecting a PC/laptop/tablet to the ODOR EASY
The ODOR EASY works fully automatically without a permanent connected PC/laptop/tablet, but a
PC/laptop/tablet is required in order to set the device parameters (e.g. to input the concentration of the
odorant in the calibration gas). The measuring instrument is equipped with a USB port (see Fig. 3),
which can be used for configuration and, if necessary, maintenance purposes. This is only for the use of
trained and qualified personnel.
The power supply to the ODOR easy must be established before it is possible to enter the settings for
the PC/laptop/tablet link.
Use the USB cable to connect the USB port of your PC to the ODOR easy.
At first use, please continue at 13.3 Setting up the USB interface by Hyperterminal page 37.
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4Commissioning
NOTICE: The electrochemical sensor in the ODOR easy requires a bias voltage in order
to measure correctly. Following a new installation, the replacement of a sensor
or a long period without any power supply, the sensor requires 6 hours after
switching on the device to attain its normal sensitivity.
In order to be able to commission the device, the ODOR easy must be connected to the power supply,
the link to the PC/laptop/tablet must be set up and the calibration gas must be available.
4.1 Setting the gas flows
DANGER Setting gas pressures higher than those permitted could result in the release of
flammable gases.
NOTICE: After connecting the gas lines, check the joints for any leakage.
4.1.1 Gas connections
The gas lines (sample gas and calibration gas)
are connected using a tube fittings (Swagelok).
The pressure reducer for the calibration gas
bottle must be purged three times with the
calibration gas before connection. (See Section
6)
DANGER Setting gas pressures
higher than 2 bar could result in the
release of flammable gases.
Fig. 8: Back panel of rotameter
4.1.2 Opening HyperTerminal
The ODOR easy must first be connected to a
control computer (PC, laptop, tablet with
HyperTerminal) with a USB cable. (See Section
3.2.3)
After doing so, start the HyperTerminal and open
the file “ODOR easy.ht”. The display is refreshed
by pressing the space bar, and pressing the
number “0” takes you to the “MAIN MENU” of
the control software.
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4.1.3 Opening the valves and setting the gas flows
Pressing the number
“
1
”
takes you to the
“
VALVE MENU
”
. Pressing the number
“
1
”
opens the calibration gas valve. The calibration
gas flow can now be set to 20 ± 5 l/h at the
needle valve of the corresponding rotameter.
Press
“
1
”
to close the valve again.
The valve for the sample gas is opened in in a
similar fashion using the number
“
2
”
, and the
flow is set in the same manner. It is important
that the two gas flows are approximately equal.
Fig. 9: Rotameter
4.2 Setting the calibration gas concentration
4.2.1 Opening HyperTerminal
The ODOR easy must first be connected to a
control computer (PC, laptop, tablet with
HyperTerminal) with a USB cable.
After doing so, start the HyperTerminal and
open the file “ODOR easy.ht”. The display is
refreshed by pressing the space bar, and
pressing the number “0” takes you to the
“MAIN MENU” of the control software.
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4.2.2 Calibration gas input
Pressing the number “8” takes you to the
“Calibration MENU”. Enter the new
concentration in µg/m³ and confirm the new
value with “ENTER”.
Example:
The certificate for the calibration gas bottle
specifies a value of 15.3 mg/m³ THT.
Enter in the ODOR easy: 15300
“Enter”
A dot is placed automatically as the 1000
separator.
4.3 Starting the test measurement
4.3.1 Opening HyperTerminal
The ODOR easy must first be connected to a
control computer (PC, laptop, tablet with
HyperTerminal) with a USB cable.
After doing so, start the HyperTerminal and open
the file “ODOR easy.ht”. The display is refreshed
by pressing the space bar, and pressing the
number “0” takes you to the “MAIN MENU” of
the control software.
4.3.2 Opening the measuring menu
Pressing the number “6” takes you to the
“MEASURING MENU”. Start the new
measurement by pressing the “S” key. The full
cycle comprises purging with external air
(prepurge) when setting the zero point,
measuring the calibration gas, purging,
measuring the sample gas and purging again.
The measurement can be cancelled at any time
by pressing the “A” key.
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4.4 Testing the analogue output signal
4.4.1 Opening HyperTerminal
The ODOR easy must first be connected to a
control computer (PC, laptop, tablet with
HyperTerminal) with a USB cable.
After doing so, start the HyperTerminal and
open the file “ODOR easy.ht”. The display is
refreshed by pressing the space bar, and
pressing the number “0” takes you to the
“MAIN MENU” of the control software.
4.4.2 Opening the DAC menu
Pressing the number “2” takes you to the “Sensor
MENU”.
Various output signals can now be simulated
here.
With the number “1”: 00 mA
With the number “2”: 10 mA
With the number “3”: 20 mA
With the number “4”: freely selectable output
signals.
After exiting the menu, the last value that was set
is retained and is replaced only when the next
measurement is performed.
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5Settings
5.1 Connection parameters
A standard terminal program, e.g. HyperTerminal under Windows, is needed in order to establish a
connection to the device.
The following parameters must be set here:
Please make sure that the correct COM port has been selected.
In the case of a virtual port, this can be found in the Windows Device Manager; see above.
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