LANDTEC SEM5000 User manual

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USER GUIDE
VERSION 3.0
SOFTWARE VERSION (707074) 40.07

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INDEX
1 GENERAL DESCRIPTION.................................................................................................................................... 3
2 USER INTERFACE ................................................................................................................................................. 4
2.1 OVERVIEW........................................................................................................................................................... 4
2.2 CONNECTIONS ..................................................................................................................................................... 4
2.3 DISPLAY .............................................................................................................................................................. 5
2.4 NAVIGATION SYSTEM (MENU) ............................................................................................................................. 6
3 INSTRUMENT FUNCTION ................................................................................................................................... 7
3.1.1 Switch ON ................................................................................................................................................... 7
3.1.2 Switch OFF................................................................................................................................................. 7
4 START WORK......................................................................................................................................................... 8
4.1 USE OF GPS......................................................................................................................................................... 8
4.1.1 GPS Activation............................................................................................................................................ 8
4.2 TEST EXECUTION ................................................................................................................................................. 9
4.2.1 AIR test ....................................................................................................................................................... 9
4.2.2 GAS test .................................................................................................................................................... 10
4.2.3 UP WIND test ........................................................................................................................................... 11
4.2.4 DOWN WIND test..................................................................................................................................... 11
4.2.5 Result ........................................................................................................................................................ 11
4.2.6 Stop the test sequences.............................................................................................................................. 11
4.3 SAVING LOCATION............................................................................................................................................. 12
4.4 DELETE DATA .................................................................................................................................................... 12
4.5 DESCRIPTION OF THE PNEUMATIC CIRCUITS ...................................................................................................... 12
4.5.1 Malfunction of the pneumatic circuit / Pump OFF................................................................................... 12
4.5.2 Restarting the pump operation.................................................................................................................. 13
5 SETTING FUNCTION .......................................................................................................................................... 14
5.1 MEASUREMENT RANGE ..................................................................................................................................... 14
5.1.1 Methane measurement .............................................................................................................................. 14
5.1.2 Measure in absolute mode (ABS) and relative mode (REL) ..................................................................... 14
5.2 ACOUSTIC AND VISUAL ALARM ......................................................................................................................... 14
5.3 BACKLIGHT -DISPLAY ILLUMINATION .............................................................................................................. 15
5.4 LCD CONTRAST................................................................................................................................................. 15
5.5 BLUETOOTH ...................................................................................................................................................... 15
5.6 RECHARGING THE BATTERY PACK ..................................................................................................................... 15
6 MAINTENANCE.................................................................................................................................................... 16
6.1 REPLACING THE BATTERY PACK ........................................................................................................................ 16
6.2 REPLACING THE HYDROPHOBIC FILTER ............................................................................................................. 17
7 CALIBRATION...................................................................................................................................................... 17
7.1 ALARMS AND ERROR INFORMATION ................................................................................................................. 18
8 WARRANTY .......................................................................................................................................................... 19
9 APPENDIX A –SAFE USE OF THE INSTRUMENT ................................................................................... 20
9.1 LASER RADIATION ............................................................................................................................................. 20
9.2 OTHER PRECAUTIONS FOR THE USAGE ............................................................................................................... 20
9.3 TESTING AND MAINTENANCE............................................................................................................................. 20
9.4 REPAIR .............................................................................................................................................................. 20
10 APPENDIX B –TABLE OF CHARACTERISTICS ...................................................................................... 21

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1GENERAL DESCRIPTION
The SEM5000 is a digital gas detection instrument from QED Environmental
Systems, Inc. The intended use of the SEM5000 is the measurement of low
concentrations of methane in the field (Landfill surface emissions monitoring,
leakage surveys of natural gas networks, control pinpointing outside buildings,
quantifying methane fluxes, and laboratory applications for gas analysis).
The instrument is selective exclusively to methane, thanks to the patented
Laser technology inside. The SEM5000 delivers reliable and accurate
measurement of methane concentrations, even if the sample contains other
gases or hydrocarbons. Due to its lightweight design and modest size, the
SEM5000 can be easily transported and is ideal for measuring methane
concentrations in the field, (landfills, site investigations or gas networks).
Thanks to its metrological sensitivity, accuracy, stability and response time,
the SEM5000 is the perfect instrument for the detection and quantification of
methane emissions.
The single-dial function selector makes the SEM5000 easy to use and the
large, back-lit LCD-display provides easy to read menus and results. The
SEM5000 has a measuring range covering 0 to 1,000,000 PPM (part per
million) or 100% methane concentration. The SEM5000 also offers a rapid
response time, improving the efficiency and saving time. The exceptional
reactivity of the SEM5000 laser technology provides excellent results during
field scans for fugitive traces of methane. The noteworthy combination of high
sensitivity and rapid response deliver outstanding measurement quality. The
SEM5000 is provided with integral GPS and Bluetooth, eliminating the need for
additional devices. The internal memory is capable of storing up to 480 hours
of scan data.
The SEM5000 is the perfect, easy-to-use instrument for accurately measuring
and recording methane concentrations during surface emissions monitoring.
CAUTION: DO NOT CHARGE THE BATTERY IN AREAS CLASSIFIED AS
HAZARDOUS.
ATTENTION: The photos shown in this user manual are indicative.

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2USER INTERFACE
2.1 Overview
Description
[1]
ON/OFF button + Backlight
[2]
Function button
[3]
Buzzer
[4]
Selector Dial
[L]
LED Alarm Lights and Impact Bumpers
[S]
Strap Connectors
2.2 Connections
Description
[1]
Gas Sample Inlet
[2]
GPS Antenna Connector
[3]
Battery Charge Connector
[1]
[2]
[3]
[4]
[L]
[S]
[1]
[2]
[3]

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2.3 Display
SECTOR
DESCRIPTION
[A]
Save Location
[A1]
Pump Status
[A2]
Tests Icons
[B]
Alarm Status
[C]
GPS Status
[D]
Battery Status
[E]
Measurement of Methane
[E1]
Type of view: ABS (absolute)
[E2]
Scale of Measurement: PPM (parts per million) – % VOL
(volume)
[F]
Bluetooth
[F1]
Bluetooth Connected with PC
Attention: this icon indicates that the instrument is
connected with the PC. Data will be saved in the PC and not the
device.
[G]
% of Memory Used
[H]
Gas Threshold
[I]
Information (data download, test results etc.)
[A]
[B]
[C]
[D]
[E]
[F]
[G]
[E1]
[E2]
[H]
[I]
[F1]
[A1]
[A2]

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2.4 Navigation System (menu)
Push the green selector dial and the menu will
appear in the display window [E].
Use the selector dial to scroll through the
available menu options. Once you have identified
your desired option, push the selector dial to
confirm your selection.
While a menu is active, the value of the gas is
shown in the upper right corner of the display
[D]. The threshold value of the test is shown in
the lower right corner of the display [H].
(See Section 4.2 for additional information).
Select “ESC” to exit the Menu.
ON/OFF GPS
Start Test
ON/OFF Alarm
Concentration Threshold
_____ PPM
Reading Interval
Delete Memory
LCD Contrast
End test
Esc
[D]
[H]
[E]

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3INSTRUMENT FUNCTION
3.1 Switch ON and Switch OFF
3.1.1 Switch ON
Press the ON/OFF button [1] for few seconds,
until the display is activated.
The start sequence includes several steps:
-Logo Landtec
-Information about the version of the
instrument firmware, serial number of
the instrument, next calibration date
NOTE - If there is existing data in the unit from
a previous scan, you will see the message
"DATA TO DOWNLOAD". In order to download
the data, you must use the SEMsoft software.
The instrument will warm up and calibrate
itself. The warm up lasts approximately 20
seconds. The instrument’s functions are not
available during the warm up period.
Once the warm up and calibration are
complete, the four LED lights will blink and the
alarm will sound.
The SEM5000 is now ready to operate.
3.1.2 Switch OFF
To switch off the instrument, press and hold
the ON/OFF button [1] for a few seconds. A
shut off message will appear on the display
and will count down to shut off.

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4START WORK
4.1 Use of GPS
Upon start up, the GPS is not active. It must be activated prior to testing.
Note: Data is only acquired and saved when the GPS is active.
4.1.1 GPS Activation
Connect the external GPS antenna.
To activate the GPS, press the selector dial
and rotate the dial to scroll through the menu
options until “ON/OFF GPS” appears. Press the
selector dial to confirm the selection. The GPS
icon will change status from “Off” to “Active”.
The "Save Location" icon will appear in the
upper left-hand corner of the display.
The percentage of memory used will be
displayed in the bottom left-hand corner.
Initially, only the percent symbol, (%), will be
displayed. Once the GPS has stabilized and the
SEM5000 begins saving data, a number will
appear next to the percent symbol to indicate
what percentage of the memory has been
used.
Icon
Description
Icon
Description
GPS active but waiting for
signal
GPS off
GPS active
Save location
The GPS module is a high performance receiver with the ability to track up to
20 satellites. The antenna is a standard, high gain, vehicular type that provides
quality tracking performance.
Start-up time for the GPS module can vary according to the strength of the
actual signal received. The presence of high trees or buildings, aerial power
lines or other obstructions will affect the signal. Typically, in an open area, the
GPS will fix in less than a minute.
In the event of signal loss during the survey, the instrument will continue to
log gas values, and will associate the last saved tracked GPS position.

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4.2 Test Execution
At any time of the work, you can perform the tests
of the instrument.
To start the test sequence, press the Selector Dial
and rotate it until “TEST” appears in the menu
screen.
Press the Selector Dial to activate the selection.
The test is composed of a sequence of 8 steps:
-AIR Test: Defines the average of the
bottom of the concentration threshold. This
test is repeated three times
-GAS Test: Defines the average of the top of
the concentration threshold. This test is
repeated three times
-UP WIND: Defines concentrations in
ambient air
-DOWN WIND: Defines concentrations in
ambient air
The sequence is:
1. AIR - 1
2. GAS 500 – 1
3. AIR – 2
4. GAS 500 – 2
5. AIR – 3
6. GAS 500 – 3
7. UP WIND
8. DOWN WIND
Attention: GPS must be active to perform the tests!
Attention: Do not switch OFF the SEM5000 during the tests!
4.2.1 AIR Test
After beginning the test sequence, the icons in the
upper left hand corner, [A] will change status. The
pump stops and test instructions will appear on the
display [I].

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Connect the tube from the air cylinder to the
SEM5000 inlet, [1].
Press the “Function” button [2] to start the
test “AIR - 1”.
TEST STARTED will appear on the display and
the pump will start.
Press the “Function” button [2] to stop the test
after you have reached a stabilized reading.
Attention: The duration of this test is min 10 seconds / max 200
seconds.
4.2.2 GAS Test
When the AIR test is finished, the GAS test icon will
appear. The icon will appear as GAS500 or GAS250,
depending you max threshold.
Connect the tube of the gas cylinder to the
SEM5000 inlet, [1].
Press the “Function” button [2] to start the
test “GAS 500- 1”.
TEST STARTED will appear on the display and
the pump will start.
Press the “Function” button [2] to stop the test
after you have reached a stabilized reading.
Attention: The duration of this test is min 0
seconds / max 30 seconds.
Attention: If the test fails, you'll have to do it
again.
Repeat these steps for the remaining tests, (AIR – 2 / GAS 500 – 2 /
AIR – 3 / GAS 500 – 3).