You settled on a precision instrument.
A good choice!
Our equipment stands out for guaranteed safety, optimal output and efficiency .
They correspond with the national and international guide-lines.
These operating instructions will help you to handle the instrument quickly and
competently.
Please pay close attention to our operating instructions before usage.
In case of further queries our staff is at your disposal at any time.
Yours
Hermann Sewerin GmbH
The law governing technical equipment (the Law on the Safety of Appliances)
of 24.06.1968 (BGBl.I, page 717) as amended by the Amendment Law of
13.08.1979 (BGBl.I, page 1432) requires the following matters to be drawn
to your attention:
Comply with the Operating InstructionsComply with the Operating Instructions
Comply with the Operating Instructions.
Comply with the Operating InstructionsComply with the Operating Instructions
Before operating or adjusting the appliance you must be thoroughly familiar
with this operating manual. You must comply with it in every respect.
The appliance is designed only for the application described and for
industrial (commercial) use.
Liability for Function and/or DamageLiability for Function and/or Damage
Liability for Function and/or Damage
Liability for Function and/or DamageLiability for Function and/or Damage
Liability for the functioning of the appliance passes to the owner or operator
in all cases in which the appliance has been improperly maintained or
repaired by persons not associated with SEWERIN Service or if it has been
used for a purpose not in accordance with its designated application.
You should therefore always use original SEWERIN accessories with the
EX-TEC® SR 5, SR4, SR2 and VARIOTEC® 8.
Hermann Sewerin GmbH accepts no responsibility for damage due to a
failure to comply with the foregoing instructions. The guarantee and liability
terms of the Hermann Sewerin GmbH terms of sale and supply are not
extended by the foregoing.
We reserve the right to make technical changes in the course of continued
development.
HERMANN SEWERIN GMBH
*All references to laws, statutes and norms relate to the legislation of the Federal Republic of
The EX-TEC® SR5, EX-TEC® SR4 and EX-TEC® SR2 models are explosion-
proof in accordance with European norms (CENELEC):
EC prototype test certificate:PTB 96 ATEX 2166
Classification: II 2 G EEx ib d IIB T4
Test institute:Physikalische-Technische
Bundesanstalt, Braunschweig
Active explosion protectionActive explosion protection
Active explosion protection
Active explosion protectionActive explosion protection
The EX-TEC® SR5 and EX-TEC® SR4 have also been tested for
functional safety in the Workplace Monitoring (WPM) field:
Test report:PFG no. 41300897
Test institute:DMT-Gesellschaft für Forschung
und Prüfung mbH, Essen
The test certificates can be found on and after page 43.
8
Page 11
1.21.2
Probe systemsProbe systems
1.2
Probe systems
1.21.2
Probe systemsProbe systems
- Probes for the survey of gas distributions networks -- Probes for the survey of gas distributions networks -
- Probes for the survey of gas distributions networks -
- Probes for the survey of gas distributions networks -- Probes for the survey of gas distributions networks -
Carpet probeCarpet probe
Carpet probe
Carpet probeCarpet probe
for checking stable surfaces.
The sample is drawn into an
excrescence in a neoprene mat
in contact with the surface with no
extraneous emissions.
Bell probe,Bell probe,
Bell probe,
Bell probe,Bell probe,
telescopic bell probetelescopic bell probe
telescopic bell probe
telescopic bell probetelescopic bell probe
for checking unstable and
overgrown surfaces.
It can be used in confined
spaces, e.g. between parked
cars or in front gardens.
- Probes for localisation -- Probes for localisation -
- Probes for localisation -
- Probes for localisation -- Probes for localisation -
Search probeSearch probe
Search probe
Search probeSearch probe
for measuring concentrations in
probe holes,
with a rigid rubber cone to seal
off the probe hole,
2 different probe tips (length 245
mm or 345 mm),
carbon-dioxide filter to filter out
traces of CO
2
9
Page 12
- Probes for hollow spaces -- Probes for hollow spaces -
- Probes for hollow spaces -
- Probes for hollow spaces -- Probes for hollow spaces -
Floating probeFloating probe
Floating probe
Floating probeFloating probe
for measuring concentrations in
pits,
with suction vent and hose
connection
Divisible handprobeDivisible handprobe
Divisible handprobe
Divisible handprobeDivisible handprobe
for the detection of leaks in pipes
installed in poorly accessible places,
measuring of concentration in containers, overall length 900 mm
- Probes for house service lines -- Probes for house service lines -
- Probes for house service lines -
- Probes for house service lines -- Probes for house service lines -
Flexible hand probesFlexible hand probes
Flexible hand probes
Flexible hand probesFlexible hand probes
for the detection of leaks in
house service lines, handle with
flexible swan neck and probe
hose, overall lengths 360 mm or
660 mm
☞
Except with the carpet probe , a probe hoseExcept with the carpet probe , a probe hose
Except with the carpet probe , a probe hose
Except with the carpet probe , a probe hoseExcept with the carpet probe , a probe hose
should always be used should always be used
should always be used
should always be used should always be used
withwith
a hydrophobic filter ! a hydrophobic filter !
with
a hydrophobic filter !
withwith
a hydrophobic filter ! a hydrophobic filter !
10
Page 13
2.02.0
Measuring operationMeasuring operation
2.0
Measuring operation
2.02.0
Measuring operationMeasuring operation
☞
ItemItem
Item
ItemItem
1alarm lampoptical warning
2LCD displaydisplay of gas
3probe connectionconnection to the probes
4buttonboardoperating the detector
Please fold out the illustration inside thePlease fold out the illustration inside the
Please fold out the illustration inside the
Please fold out the illustration inside thePlease fold out the illustration inside the
front cover !front cover !
front cover !
front cover !front cover !
DescriptionDescription
Description
DescriptionDescription
FunctionFunction
Function
FunctionFunction
when alarm thresholds are
exceeded
concentrations and
operating conditions
described
5harnessfor portable systems
6outletfor gas sample
7buzzeracoustic warning
when alarm thresholds are
exceeded
2.12.1
Switching onSwitching on
2.1
Switching on
2.12.1
Switching onSwitching on
• press the
detection mode) or
(workplace-monitoring mode, p.
16 ff.) for approx. 2 seconds
• optical and acoustic control signal
(items 1 and 7) operate for approx.
2 seconds
on/off buttonon/off button
on/off button (gas-
on/off buttonon/off button
WPM button WPM button
WPM button
WPM button WPM button
11
Page 14
• display of available operating
hours in the form of bars (e.g. 5
hours)
• the integral pump operates at
maximum power
• wait until the zero point has
established itself in fresh air
(approx. 2-3 minutes):
EX-TEC® SR5 and VARIOTEC® 8:
0 PPM0 PPM
☞
0 PPM
0 PPM0 PPM
2.22.2
Illumination and contrastIllumination and contrast
2.2
Illumination and contrast
2.22.2
Illumination and contrastIllumination and contrast
(after flashing stops)
EX-TEC® SR4 and EX-TEC® SR2:
0,0 %VOL0,0 %VOL
☞
0,0 %VOL
0,0 %VOL0,0 %VOL
• pressing the
switches the LCD illumination on
and off
• the illumination automatically
switches off approx. 4 minutes
after being switched on
light buttonlight button
light button
light buttonlight button
12
• simultaneously pressing the light
andand
button
increases or reduces the contrast
of the LCD display
and a cursor button
andand
Page 15
2.32.3
Pump operationPump operation
2.3
Pump operation
2.32.3
Pump operationPump operation
• pressing the
switches the pump on and off
• the corresponding symbol
appears in or disappears from
the LCD display (item 2)
• this enables the pump function to
be checked
pump buttonpump button
pump button
pump buttonpump button
☞
Altering the pump powerAltering the pump power
Altering the pump power
Altering the pump powerAltering the pump power
(available only on the (available only on the
(available only on the EX-TEC® SR5
(available only on the (available only on the
• simultaneously pressing the
pump button
button increases or reduces the
pump power
gas detectiongas detection
☞
gas detection
gas detectiongas detection
for above-ground gas detection
(pipeline monitoring) always use
maximum pump powermaximum pump power
maximum pump power
maximum pump powermaximum pump power
house service lineshouse service lines
☞
house service lines
house service lineshouse service lines
) !) !
) !
) !) !
andand
and one cursor
andand
for detecting leaks in pipelines
inside buildings always use
minimum pump powerminimum pump power
minimum pump power
minimum pump powerminimum pump power
13
Page 16
2.42.4
Alarm signal and volumeAlarm signal and volume
2.4
Alarm signal and volume
2.42.4
Alarm signal and volumeAlarm signal and volume
• pressing the
signal buttonsignal button
signal button
signal buttonsignal button
switches the alarm signal on and
off
• the corresponding symbol
appears in or disappears from
the LCD display (item 2)
• this enables the alarm signal to
be checked
• simultaneously pressing the
signal button
andand
and one cursor
andand
button increases or reduces the
buzzer volume (item 7)
cursor buttons while holding down
the zoom button switches
manually to the required display
range
• if the detector fails to reach its
zero point of
0 PPM0 PPM
0 PPM or
0 PPM0 PPM
after flushing with copious fresh
air, pressing the
buttonbutton
button enables you to adjust it
buttonbutton
manually
0,00,0
%VOL%VOL
0,0
%VOL
0,00,0
%VOL%VOL
zero pointzero point
zero point
zero pointzero point
2.82.8
Workplace monitoringWorkplace monitoring
2.8
Workplace monitoring
2.82.8
Workplace monitoringWorkplace monitoring
☞
This function is available only with the This function is available only with the
This function is available only with the EX-TEC® SR5
This function is available only with the This function is available only with the
and and
and EX-TEC® SR4
and and
• the reading display flashes while
the adjustment is being carried
out
• measurement cannot be
resumed until
stops
detectors ! detectors !
detectors !
detectors ! detectors !
• this function is switched on by
pressing the
mm
monitoring)
mm
afteafte
after the flashing
afteafte
WPM WPM
WPM (
WPM WPM
buttonbutton
button
buttonbutton
ww
work
ww
pp
place
pp
16
• the detector can also be switched
on by pressing this button
Page 19
• this measuring range is used to
monitor proximity to the
ll
lower
(
ll
ee
explosion
ee
ll
limit)
ll
LELLEL
LEL
LELLEL
• after approx. 8 seconds' warm-
up time a stable zero point is
reached
• the pump runs at minimum power
and the acoustic operating signal
(item 7) sounds every 5 seconds
• when the pre-set threshold of
20 %LEL is exceeded
methane:methane:
methane: 20 %LEL = 0,88 %VOL
methane:methane:
(display = 0,90 %VOL)
propane:propane:
propane: 20 %LEL = 0,34 %VOL
propane:propane:
advance alarmadvance alarm
the
advance alarm is triggered
advance alarmadvance alarm
both optically (item 1) and
acoustically (item 7)
• the advance alarm is an
intermittent tone quite distinct
from the operating signal;
ceases after a certain periodceases after a certain period
it
ceases after a certain period
ceases after a certain periodceases after a certain period
and cannot be cleared
• if the concentration exceeds
100 %LEL
methane:methane:
methane:100 %LEL = 4,40 %VOL
methane:methane:
propane:propane:
propane:100 %LEL = 1,70 %VOL
propane:propane:
main alarmmain alarm
the
main alarm is triggered
main alarmmain alarm
optically (item 1) and acoustically
(item 7)
17
Page 20
2.92.9
Battery alarmBattery alarm
2.9
Battery alarm
2.92.9
Battery alarmBattery alarm
• the main alarm is a continuous
tone quite distinct from the
operating signal;
continues indefinitelycontinues indefinitely
it
continues indefinitely and
continues indefinitelycontinues indefinitely
cannot be cleared
Cancelling the main alarm:Cancelling the main alarm:
•
Cancelling the main alarm:
Cancelling the main alarm:Cancelling the main alarm:
switch to location operation (press
the pump button for approx. 2
seconds ) or switch the detector
off
• if the battery symbol appears in
the LCD display, at least 15
minutes' operating time remains;
after that the detector must be
recharged
2.10Switching off2.10Switching off
2.10Switching off
2.10Switching off2.10Switching off
• in workplace-monitoring mode
the battery alarm is accompanied
by a "double beep" to distinguish
it from the operating signal
• Press the
on/off buttonon/off button
on/off button for
on/off buttonon/off button
approx. 2 seconds
• the optical and acoustic
monitoring signals (items 1 and
7) operate for approx. 2 seconds
18
• remaining operating hours are
displayed in the form of bars
Page 21
3.03.0
Charging techniqueCharging technique
3.0
Charging technique
3.03.0
Charging techniqueCharging technique
☞
When fully charged the detectors have a
operating time with the pump running.
For charging you need the
which can be used either in the workshop or in the standby vehicle.
The The
The EX-TEC® SR5,
The The
must not be recharged in an explosive gasmust not be recharged in an explosive gas
must not be recharged in an explosive gas
must not be recharged in an explosive gasmust not be recharged in an explosive gas
atmosphere !atmosphere !
atmosphere !
atmosphere !atmosphere !
SR4, SR2
HS charging adapterHS charging adapter
HS charging adapter (see illustration),
HS charging adapterHS charging adapter
and and
and VARIOTEC® 8
and and
maximummaximum
maximum of 8 hours'
maximummaximum
The following items can be
connected to the side of the
charging adapter:
• 230 V mains power pack ≈,
detectors detectors
detectors
detectors detectors
• 12 V= vehicle adapter,
• 24 V= vehicle adapter.
ChargingCharging
Charging
ChargingCharging
Switch the detector off and plug it into the charger. A display of the
following type appears:
• the detector has 5 operating hours
left (= 5 bars) and will take 3 hours
to become fully charged
• if it is fully charged all the bars are
visible and the number display
disappears
• the detector can be left in the
charger until it is next needed
19
Page 22
Spontaneous dischargeSpontaneous discharge
Spontaneous discharge
Spontaneous dischargeSpontaneous discharge
If the detector is
nickel-cadmium battery spontaneously discharges, thus reducing the
available operating hours.
After a maximum of 30 days the detector indicator shows that there are
no operating hours left, and it must be recharged.
not connected to the charger when switched off, the
☞
Short periods of operation and prolonged disuseShort periods of operation and prolonged disuse
Short periods of operation and prolonged disuse
Short periods of operation and prolonged disuseShort periods of operation and prolonged disuse
may lead in the long term to the so-called "memorymay lead in the long term to the so-called "memory
may lead in the long term to the so-called "memory
may lead in the long term to the so-called "memorymay lead in the long term to the so-called "memory
effect", in which the display indicates a highereffect", in which the display indicates a higher
effect", in which the display indicates a higher
effect", in which the display indicates a highereffect", in which the display indicates a higher
battery capacity than is actually available. This canbattery capacity than is actually available. This can
battery capacity than is actually available. This can
battery capacity than is actually available. This canbattery capacity than is actually available. This can
be avoided by fully discharging -the detectorbe avoided by fully discharging -the detector
be avoided by fully discharging -the detector
be avoided by fully discharging -the detectorbe avoided by fully discharging -the detector
regularly (e.g. once a month), leaving it switched onregularly (e.g. once a month), leaving it switched on
regularly (e.g. once a month), leaving it switched on
regularly (e.g. once a month), leaving it switched onregularly (e.g. once a month), leaving it switched on
until it automatically switches off, then recharginguntil it automatically switches off, then recharging
until it automatically switches off, then recharging
until it automatically switches off, then recharginguntil it automatically switches off, then recharging
it !it !
it !
it !it !
20
Page 23
4.04.0
Inspection, testing and maintenanceInspection, testing and maintenance
4.0
Inspection, testing and maintenance
4.04.0
Inspection, testing and maintenanceInspection, testing and maintenance
DVGW work sheet G 465/IV requires detectors to be inspected,
tested and maintained.
Sensitivity testingSensitivity testing
Sensitivity testing
Sensitivity testingSensitivity testing
may be necessary several times a day, according to G 465/I, depending
on the circumstances - particularly with gas detectors used to monitor
mains pipes.
InspectionInspection
Inspection
InspectionInspection
must be carried out up to six times a year, depending on frequency of
use - and at any rate at least once a year. The following items must be
tested:
• detector condition• pump power
• battery condition• zero point
• intake channel• sensitivity (with test gas)
☞
TT
est reportest report
T
est report
TT
est reportest report
Test results must be recorded. A specimen form will be found on the
last page of this manual.
Servicing and maintenanceServicing and maintenance
Servicing and maintenance
Servicing and maintenanceServicing and maintenance
DVGW work sheet G 465/IV specifies that servicing and maintenance
of the detectors may be carried out only by the following persons:
Workplace monitoring mode:Workplace monitoring mode:
For your own safety you are recommended alwaysFor your own safety you are recommended always
For your own safety you are recommended always
For your own safety you are recommended alwaysFor your own safety you are recommended always
to check the %LEL range with test gas before useto check the %LEL range with test gas before use
to check the %LEL range with test gas before use
to check the %LEL range with test gas before useto check the %LEL range with test gas before use
and recalibrate if necessaryand recalibrate if necessary
and recalibrate if necessary
and recalibrate if necessaryand recalibrate if necessary
(instruction sheet T 031 / BG Chemie) !(instruction sheet T 031 / BG Chemie) !
(instruction sheet T 031 / BG Chemie) !
(instruction sheet T 031 / BG Chemie) !(instruction sheet T 031 / BG Chemie) !
Servicing must be carried out at least once a year. The next scheduled
date must be entered on the inspection sticker attached to the detector
(month/year).
After servicing a certificate must be completed.
21
Page 24
4.14.1
TT
4.1
4.14.1
est setsest sets
T
est sets
TT
est setsest sets
Pump power, zero point and sensitivity should be tested with an
SPE 1SPE 1
SPE 1 or
SPE 1SPE 1
SPE 3SPE 3
SPE 3 test set and a suitable test gas:
SPE 3SPE 3
Pos. 1
SPE 1 SPE 1
SPE 1 test set, used to test:
SPE 1 SPE 1
• pump power
• zero point in the
• sensitivity in the
%LEL and %VOL range%LEL and %VOL range
%LEL and %VOL range
%LEL and %VOL range%LEL and %VOL range
%LEL and %VOL range%LEL and %VOL range
%LEL and %VOL range
%LEL and %VOL range%LEL and %VOL range
and for use with the following test gases:
methane CH4:•1.00 vol.%
•2.20 vol.% (50 %LEL)
•100 vol.%
propane C3H8:•1.00 vol.% (59 %LEL)
•100 vol.%
22
Page 25
Pos. 2
SPE 3 SPE 3
SPE 3 test set, used to test:
SPE 3 SPE 3
• pump power
• zero point in the
• sensitivity in the
PPM rangePPM range
PPM range
PPM rangePPM range
PPM rangePPM range
PPM range
PPM rangePPM range
and for use with the following test gases:
methane CH4:•10 ppm
•100 ppm
•1,000 ppm
23
Page 26
4.24.2
TT
4.2
4.24.2
est gasesest gases
T
est gases
TT
est gasesest gases
The following test gases were used to function-test the detectors:
methane CH
EX-TEC® SR5ppm range10 ppm CH
100 ppm CH
1,000 ppm CH
1.00 vol.% CH
propane C3H
4
4
4
4
4
%LEL range2.20 vol.%1.00 vol.%
(50 %LEL)(59 %LEL)
vol.% range100 vol.%100 vol.%
or location
natural gas
EX-TEC® SR4%LEL range2.20 vol.%1.00 vol.%
(50 %LEL)(59 %LEL)
vol.% range100 vol.%100 vol.%
or location
natural gas
8
EX-TEC® SR2vol.% range100 vol.%100 vol.%
or location
natural gas
VARIOTEC® 8ppm range10 ppm CH
100 ppm CH
1,000 ppm CH
1.00 vol.% CH
4
4
4
4
vol.% range100 vol.%100 vol.%
or location
natural gas
For detector settings other than methane or propane the correct values
can be found inside the cover on page 2.
24
Page 27
4.34.3
Function testingFunction testing
4.3
Function testing
4.34.3
Function testingFunction testing
Proceed as follows:
• screw the selected test-gas bottle onto the test set as far as it
will go (illustration 1/2 - item 2)
• connect the detector's probe nipple (item 3) to the test set hose
(illustration 1/2 - item 1)
• switch the detector on; the pump draws in
fresh airfresh air
fresh air through the
fresh airfresh air
test set (illustration 1/2 - item 4)
• use the needle valve (illustration 1/2 - item 5) to set the maximum
flow; it must be > 50 l/h (illustration 1/2 - item 6)
• wait until a stable zero point has been established (warm-up
time)
• press the release button (illustration 1/2 - item 3) on the test set
and adjust the flow to the fresh-air value (illustration 1/2 - item 6)
• hold it down until the indicated concentration has reached a
stable value
Admissible display values for methane CH4 test gas:
• test gas 10 ppm:> 5 ppm
• test gas 100 ppm:70 ... 140 ppm
• test gas 1,000 ppm :800 ... 1,200 ppm
• test gas 1.00 vol.% :0.80 ... 1.20 vol.%,
• test gas 2.20 vol.% :2.00 ... 2.40 vol.% (45 - 55 %LEL)
• test gas 100 vol.%:98 ... 102 vol.%
Admissible display values for propane C3H8 test gas:
• test gas 1.00 vol.% :0.90 ... 1.10 vol.% (55 - 64 %LEL)
• test gas 100 vol.%:98 ... 102 vol.%
If display values are outside these tolerances the detector must be
recalibrated (section 5.0 Adjustment).
25
Page 28
5.05.0
AdjustmentAdjustment
5.0
Adjustment
5.05.0
AdjustmentAdjustment
EX-TEC® SR5, SR4, SR2 and VARIOTEC® 8 detectors are factory-set
for all measuring ranges.
You can adjust each of the ranges using appropriate test gases (one
for each range).
☞
TT
esting procedureesting procedure
T
esting procedure
TT
esting procedureesting procedure
Connect your detector (switched off) to the
and a test gas .
All the following adjustment steps are shown on anAll the following adjustment steps are shown on an
All the following adjustment steps are shown on an
All the following adjustment steps are shown on anAll the following adjustment steps are shown on an
EX-TEC® SR5
models !models !
models !
models !models !
detector; they are identical for all other detector; they are identical for all other
detector; they are identical for all other
detector; they are identical for all other detector; they are identical for all other
• now press these 3 buttons
simultaneously
SPE 1SPE 1
SPE 1 or
SPE 1SPE 1
SPE 3SPE 3
SPE 3 test set
SPE 3SPE 3
Display 1 - version number / zero pointDisplay 1 - version number / zero point
Display 1 - version number / zero point
Display 1 - version number / zero pointDisplay 1 - version number / zero point
Once the number of available operating hours has been displayed the
detector is in
26
adjustment mode:adjustment mode:
adjustment mode:
adjustment mode:adjustment mode:
• the software version number (e.g.
V1.0) is displayed and the pump
runs at maximum power
• the reading display flashes until
the zero point of the sensor has
been automatically established
Synthetic or fresh air is used for the zero-point adjustment, you must
always achieve sensitivity of > 5 ppm when using 10 ppm methane CH
test gas.
To this end you can select from the following amplification ratios in the
10 ppm range by repeatedly pressing the on/off switch:
4
32
1,0 x 10 PPM1,0 x 10 PPM
1,0 x 10 PPM-100% amplification
1,0 x 10 PPM1,0 x 10 PPM
1,2 x 10 PPM1,2 x 10 PPM
1,2 x 10 PPM-120% amplification
1,2 x 10 PPM1,2 x 10 PPM
1,5 x 10 PPM1,5 x 10 PPM
1,5 x 10 PPM-150% amplification (factory setting)
1,5 x 10 PPM1,5 x 10 PPM
• confirm the selected amplification
(e.g.
1,5 x 10 PPM1,5 x 10 PPM
1,5 x 10 PPM) with the on/
1,5 x 10 PPM1,5 x 10 PPM
off button
Page 35
Display 13 - LCD checkDisplay 13 - LCD check
Display 13 - LCD check
Display 13 - LCD checkDisplay 13 - LCD check
With this function you can check whether all elements of the LCD
display are operating normally.
• confirm the LCD check with the
on/off button
• press the cursor-up button to
return to the first display
Leaving adjustment modeLeaving adjustment mode
Leaving adjustment mode
Leaving adjustment modeLeaving adjustment mode
• press the pump button to return
gas-detection modegas-detection mode
to
gas-detection mode or
gas-detection modegas-detection mode
• press the WPM button to return
workplace-monitoring workplace-monitoring
to
workplace-monitoring
workplace-monitoring workplace-monitoring
mode mode
mode
mode mode
or
• press the on/off button to switch
the detector off.
33
Page 36
6.06.0
TT
6.0
6.06.0
echnical specificationsechnical specifications
T
echnical specifications
TT
echnical specificationsechnical specifications
Maximum pointerMaximum pointer
Maximum pointer
Maximum pointerMaximum pointer
To facilitate the comparison of different gas concentrations, the
maximum value is displayed by a flashing
maximum pointermaximum pointer
maximum pointer.
maximum pointermaximum pointer
• this remains in the LCD display
(item 2) for about 4 minutes unless
updated by a higher concentration
• pressing the zoom button makes
the maximum pointer disappear
Heavy gasHeavy gas
Heavy gas
Heavy gasHeavy gas
• a negative sign in the measuring-
value display indicates a mixture
of light and heavy gas in which the
heavy gas (e.g. propane C3H8 or
carbon dioxide CO2)
predominates.
• if it is carbon dioxide, we
recommend the use of a CO
filter (accessories) to suppress
this heavy-gas component
Oxygen concentrationOxygen concentration
Oxygen concentration
Oxygen concentrationOxygen concentration
In order to guarantee electrical safety the detectors may not be used
in an oxygen concentration exceeding 21 vol.%.
An oxygen deficiency may lead to deviations from the correct reading.
At oxygen concentrations beteween 20.9 vol.% and 5 vol.% this
deviation is less than 5 %.
2
34
Page 37
Gasing and InertisationGasing and Inertisation
Gasing and Inertisation
Gasing and InertisationGasing and Inertisation
To carry out gasing (concentration increase to 100 vol.%) or inertisation
(concentration reduction to 0 vol.%) proceed as follows:
• manually select the
0...100 %VOL measuring0...100 %VOL measuring
0...100 %VOL measuring
0...100 %VOL measuring0...100 %VOL measuring
range range
range with the zoom button and
range range
the cursor buttons
• this is the only measuring range
in which gasing and inertisation
can be unambiguously monitored
Automatic alarm resetAutomatic alarm reset
Automatic alarm reset
Automatic alarm resetAutomatic alarm reset
• if the signal button has been
pressed to deactivate an alarm,
the alarm signal is automatically
reset after approx. 60 seconds
• the corresponding symbol
reappears in the LCD display
(item 2)
• this is intended to stop you
forgetting that the alarm signal
has gone off
CleaningCleaning
Cleaning
CleaningCleaning
Clean the detectors only with a damp cloth. No solvents, benzenes or
similar substances may be used !
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Static chargingStatic charging
Static charging
Static chargingStatic charging
Generally speaking electrostatic charging should be avoided. Objects
with no electrostatic earth (including, for example, metallic housings
with no earth connection) are not protected from charges resulting from
dust, vapour flows and the like.
Fine dust filtersFine dust filters
Fine dust filters
Fine dust filtersFine dust filters
There are fine dust filters in the screw-on probe connector (item 3) and
in most probes.
The filters can be cleaned by tapping or blowing to remove the dust.
☞
Sensor sensitivitySensor sensitivity
Sensor sensitivity
Sensor sensitivitySensor sensitivity
The sensors are deleteriously affected by gaseous components of
silicones, oils and phosphate esters, which irreversibly reduce their
sensitivity.
Pollution of the measuring environment by halogens, burnt neoprene,
PVC, trichloroethylene and the like also weakens the sensitivity of the
sensors, but in this case it can be regenerated.
After cleaning the filters must be replaced in theAfter cleaning the filters must be replaced in the
After cleaning the filters must be replaced in the
After cleaning the filters must be replaced in theAfter cleaning the filters must be replaced in the
same position as before !same position as before !
same position as before !
same position as before !same position as before !
Heavily-soiled filters should be replaced by newHeavily-soiled filters should be replaced by new
Heavily-soiled filters should be replaced by new
Heavily-soiled filters should be replaced by newHeavily-soiled filters should be replaced by new
ones (accessories) !ones (accessories) !
ones (accessories) !
ones (accessories) !ones (accessories) !
Operation hours during measuring timeOperation hours during measuring time
Operation hours during measuring time
Operation hours during measuring timeOperation hours during measuring time
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• simultaneously pressing both
cursor buttons in the detection
mode displays the remaining
operating time (e.g. 5 hours)
• display disappears (battery
symbol and bars) automatically
after approx. 10 seconds.