Sewerin Ex-tec Combi User Manual
Operating
Instructions
Measurable success by Sewerin equipment
Congratulations.
You have chosen a quality instrument manufactured by Hermann
Sewerin GmbH.
Our equipment will provide you with the highest standards of performance, safety and efficiency. They correspond with the national and
international guide-lines.
Please read and understand the following operating instructions before
using the equipment; they will help you to use the instrument quickly and
competently. If you have any queries we are available to offer advice
and assistance at any time.
Yours
Hermann Sewerin GmbH
Robert-Bosch-Straße 3
33334 Gütersloh, Germany
Tel.: +49 5241 934-0
Fax: +49 5241 934-444
www.sewerin.com
info@sewerin.com
Sewerin Ltd.
8, Walsworth Road
Hitchin
Hertfordshire
SG4 9SP, UK
phone: +44 1462-634363
www.sewerin.co.uk
info@sewerin.co.uk
SEWERIN Sarl
17, rue Ampère - BP 211
67727 HOERDT CEDEX, France
Tél. : +33 3 88 68 15 15
Fax : +33 3 88 68 11 77
www.sewerin.com
sewerin@sewerin.fr
Sewerin USA, LLC
13551 W. 43rd Drive, Unit R
Golden, CO 80403-7272
phone: +1 303-424-3611
fax: +1 303-420-0033
www.sewerin.net
jerry.palmer@sewerin.net
SEWERIN IBERIA S.L.
c/ Cañada Real de Merinas, 17
Centro de Negocios „Eisenhower“
Edificio 5; Planta 2 - C
28042 Madrid, España
Tel.: +34 91 74807-57
Fax: +34 91 74807-58
www.sewerin.com
info@sewerin.es
Illustration EX-TEC Combi
EX-TEC® Combi
EX-TEC® Combi
100%
Device variation 1
Device variation 2
Brief operating instructions
EX-TEC Combi: brief operating instructions
Switch on/off
Toggle between GAS WARNING/GAS
MEASUR E M ENT op e rat i n g mo d es
(Device variation 2)
Device variation 1: Toggle between
GA S WAR NING/GAS MEASURE MENT operating modes
Switch pump on/off
(in GAS MEASUREMENT mode)
Toggle between automatic/manual gas
switching
Change the gas displayed (in manual
operation)
Zero-point correction for the gas displayed
Display gas alarm thresholds AL1 and
AL2
Acoustic clearance of the AL1 alarm
Switch LCD illumination on/off (switches
off automatically after about 4
Operating Instructions
EX-TEC® Combi
15.06.2005 – V2.X – 103401 – en
For your safety
This product may only be operated by appropriately-trained persons who
are familiar with the relevant operating manual.
It may only be used for its designated purpose, i.e. for industrial and commercial use.
Repair work may only be carried out by specialists or by persons who have
undergone appropriate training.
Any alterations or modifications to the product require the prior approval of
Hermann Sewerin GmbH. In the event of unauthorised alterations to the
product the manufacturer accepts no liability for damage.
Only Hermann Sewerin GmbH accessories may be used with the product.
Only spare parts approved by us may be used for repairs.
Hermann Sewerin GmbH accepts no liability for damage resulting from
non-compliance with the foregoing. The guarantee and liability provisions
in the Hermann Sewerin GmbH terms of sale and supply are not extended
by the foregoing.
We reserve the right to make changes in the context of continued technical development.
In addition to these instructions, please comply with generally applicable
safety and accident-prevention regulations!
Symbols used:
(⊗)
CAUTION!
This symbol warns of dangers that may threaten
the safety of the user or maty damage or destroy
the product.
Note:
This symbol flags information and hints extending
beyond the actual operation of the product .
This symbol will hereinafter identify all operating
modes and measuring techniques not tested by
DMT!
Contents Page
1 EX-TEC Combi system ...........................................................1
1.1 Excess-gas warning and measuring instrument .......................1
1.2 Fields of application ..................................................................2
1.3 Test certificates .........................................................................4
1.4 Carrying equipment ...................................................................5
2 Safety .......................................................................................6
2.1 Safety notes .............................................................................. 6
3 Measuring operation ...............................................................8
3.1 Instrument description ...............................................................8
3.2 Switching on ..............................................................................9
3.3 Modes .....................................................................................13
3.4 Switching gases ...................................................................... 15
3.5 Alarms .....................................................................................16
3.6 Instantaneous value alarms (AL1, AL2, AL3) ..........................17
3.7 Short-term value alarm (KZW), long-term value alarm (LZW),
minimum and maximum values (MIN/MAX) ............................23
3.8 Zero point adjustment .............................................................26
3.9 Illumination and contrast ......................................................... 26
3.10 Operating hours display and battery alarm ............................. 27
3.11 Switching off ............................................................................28
4 Charging ................................................................................29
4.1 Charging and charge maintenance .........................................29
4.2 Self-discharge ......................................................................... 30
5 Testing/maintenance .............................................................31
5.1 Function testing, testing display accuracy, maintenance ........32
5.2 Test set ....................................................................................34
5.3 Test gases ...............................................................................35
5.4 Testing the pump power, zero point and sensitivity .................37
I
Contents Page
6 Info menu ...............................................................................39
6.1 Menu structure ........................................................................ 39
6.2 Overview ................................................................................. 40
7 Adjustment menu ..................................................................43
7.1 Menu structure ........................................................................ 43
7.2 Setting the H2S sensor ............................................................44
7.3 Setting the CO sensor .............................................................45
7.4 Setting the O2 sensor ..............................................................46
7.5 Setting the CO2 sensor ............................................................47
7.6 Setting the CH4 sensor ............................................................48
7.7 Setting the measurement quantity ..........................................50
7.8 Setting the test gas concentration ...........................................51
7.9 Inspection confirmation ........................................................... 54
7.10 Leaving the adjustment menu .................................................55
8 Memory menu ........................................................................56
8.1 Menu structure ........................................................................ 56
8.2 Clearing memory .....................................................................57
8.3 Setting the memory interval ....................................................58
8.4 Setting the memory mode .......................................................60
8.5 Setting the short-term value interval .......................................61
8.6 Leaving the memory menu ......................................................62
9 System menu .........................................................................63
9.1 Menu structure ........................................................................ 63
9.2 Setting the date/time ............................................................... 64
9.3 Setting the inspection interval ................................................. 66
9.4 Setting the inspection block ....................................................69
9.5 Setting the 100 vol.% range ....................................................70
9.6 Setting the PIN code ............................................................... 71
9.7 Setting the alarm thresholds ..................................................73
9.8 Checking the LCD ...................................................................77
9.9 Leaving the system menu ....................................................... 77
II
Contents Page
10 Application hints ...................................................................78
10.1 Application hints from report of suitability examination
PFG-No. 41300401P ...............................................................78
11 Technical aspects ................................................................. 80
11.1 Technical notices ..................................................................... 80
11.2 Technical data .........................................................................82
11.3 Error messages .......................................................................93
11.4 Error and Alarm properties ......................................................97
11.5 Wearing Parts .........................................................................98
11.6 Spare parts ..............................................................................98
11.7 EC-Sensor Disposal ................................................................98
12 Hints on Disposal ..................................................................99
13 Delivery variants and accessories ....................................100
13.1 Delivery variants ....................................................................100
13.2 Accessories ...........................................................................101
Appendix ............................................................................................108
EC-type-examination certificates .........................................................108
Declaration of Conformity .................................................................... 118
Inspection protocols ............................................................................ 119
III
1
1 EX-TEC Combi system
1 EX-TEC Combi system
1.1 Excess-gas warning and measuring instrument
The EX-TEC Combi is a combined warning and measuring
instrument for a number of different gases. It consists of:
the basic instrument, incorpora ting a pum p and a dat a
memory for documentation
purposes
4 sensor sockets for the measurement of up to 5 different
gases
The following sensors are available:
methane CH
4
or
propane C3H8
or nonane C9H20 (*)
carbon dioxide CO
2
oxygen O
2
hydrogen sulphide H2S
carbon monoxide CO
combined H2S/CO sensor
(*) This operating manual only describes methane mea-
surement!
2
1 EX-TEC Combi system
1.2 Fields of application
The EX-TEC Combi is suitable for use in the following fields:
WARNING mode
Workplace (atmospheric) monitoring in shafts and chambers in
these fields:
drinking-water supply (metering
and transfer shafts)
district-heating systems
telecommunications shafts
effluent-treatment systems
(sewage works, pump sumps,
digestion-tank areas, rainoverflow basins)
traffic areas
accessible culverts
Warning of explosive*) mixtures
- due to leaking gas pipes near the shaft
- due to the proximity of oil, coal, natural-gas or LPG storage
facilities
- due to the proximity of landfill sites, marshland, chemical
works, filling stations or refineries
- due to cleaning or coating work with substances containing
solvents
- due to the prohibited introduction of combustible substances
into the canal network (e.g. petrol leaks)
*) the EC prototype test certificate DMT01ATEX G 002 includes measurement functions
of the LEL methane/propane range
Warning of an oxygen defect /oxygen excess
- due to an increase in other gas components
- due to the decomposition of organic waste in shafts (e.g. wet
leaves)
1 EX-TEC Combi system
- due to welding and heating processes with naked flames
- due to air depletion
Warning of toxic gases
- due to the formation of carbon dioxide by bacterial conversion
processes
- due to the formation of carbon dioxide in areas where there
is mineral water
- due to the formation of carbon dioxide in exhaled air
- due to the formation of hydrogen sulphide in effluent
- due to the formation of carbon monoxide from incomplete
combustion (e.g. poorly-adjusted gas-heating systems)
- due to the formation of carbon monoxide near highways or
car-parks
GAS-MEASURING mode *)
Determining gas concentrations
Localisation
- measuring gas concentration in probe holes
- determining which probe
hole has the maximum concentration
Gas injection
- monitoring filling with natural
gas and oxygen extraction
- measuring the methane and
oxygen concentration
Inertisation
- monito r ing flus h ing with
nitrogen and natural-gas
extraction
- measuring the methane and
oxygen concentration
*) No measuring function for explosion protection in accordance with guideline 94/4/EG.
3
4
1 EX-TEC Combi system
1.3 Test certificates
Passive explosion protection
The EX-TEC Combi has been tested for explosion protection in
accordance with the European norm (CENELEC):
EC prototype test certificate:
Identification: II 2 G EEx ib d IIB T3
Testing institution: Physikalisch-Technische Bundesan-
Active explosion protection (measuring function)
The EX-TEC Combi has also been undergone a measurementfunction test in gas-warning mode:
EG prototype test certificate:
Test report: PFG n° 41300401
Testing institution: Deutsche Montan-Technologie GmbH
PTB 96 ATEX 2166, supplements 1
and 3
stalt, Braunschweig
DMT 01 ATEX G002, supplement 1
(measurement range 0 – 100 %LEL
methane/propane)
measurement range 0 – 25 vol.%
oxygen, measurement of oxygen
defect and excess,
measurement range 0 – 5 vol.% of
carbon dioxide,
measurement range 0 – 500 ppm of
carbon monoxide
measurement range 0 – 100 ppm of
hydrogen sulphide
(DMT), Essen
The test certificates can be found in the appendix.
front view side view back view
front view side view back view
1.4 Carrying equipment
TRIANGEL carrying system
a quick and easy way of carrying the instrument, consisting of a
carrying strap and neck-pad
1 EX-TEC Combi system
CROSS-STRAP carrying system
a comfortable way to carry the instrument for longer periods,
consisting of 2 carrying straps crossed at the back
5
6
2 Safety
2 Safety
2.1 Safety notes
CAUTION!
Always use original SEWERIN accessories with the
EX-TEC Combi.
CAUTION!
Always use a probe hose with a hydrophobic filter.
CAUTION!
Do not use other than the original SEWERIN fine
dust filters with the EX-TEC Combi. Never use ac-
tivated carbon filters, as these will collect H2S gas
particles, thus causing the warning feature to stop
working properly.
CAUTION!
Observe the permissible operating temperature of
-10 °C to +40 °C.
CAUTION!
The EX-TEC Combi may only be recharged in an
area not exposed to the danger of explosion.
2 Safety
CAUTION!
Use the test gases only in well-ventilated areas,
as some concentrations exceed the pertinent MAK
values.
CAUTION!
The EX-TEC Combi satisfies the limits of the EMV
regulation. When using it near mobile radio equipment please also observe the instructions in their
manuals.
7
8
3 Measuring operation
3 Measuring operation
3.1 Instrument description
Note:
Fold out the illustration inside the front cover!
Item description function
1 alarm lamp optical warning on:
2 LCD display of:
3 probe connection connection for:
4 keypad instrument operation
5 attachment for carrying systems:
6 outlet for the gas sample
7 buzzer acoustic warning on:
8 interface serial RS-232-interface for con-
breaching alarm thresholds
display of error messages
gas concentrations
menu items
operating conditions
error messages
probe hose
test set
Triangel
cross-strap
breaching alarm thresholds
display of error messages
nection to a PC
(⊗)
3.2 Switching on
3 Measuring operation
always switch the instrument
on in “fresh air”
press the on/off key for about
3 seconds
the optical and acoustic control
signals (items 1 and 7) operate
for about 3 seconds
the LCD illumination automati-
cally switches on for about 4
minutes
available operating hours are
displayed in the form of the
battery symbol and bars (e.g.:
5 hours = 5 bars)
the built-in pump runs at con-
stant power
the software version number
(e.g. 2.1) and instrument type
(Combi) are displayed
Note:
All the following instrument displays assume that
the EX-TEC Combi is fully equipped for the measurement of 5 gases (CH4 - CO2 - O2 - H2S - CO).
9
10
3 Measuring operation
CH4 - methane
the measurement range for
methane is displayed:
0.00 – 4.40 %VOL
depending on your last setting
a display in the %UEG, %LEL,
%LIE, %VOL, %GAZ quanti-
ties may also be possible (cf.
section 7.6: Adjusting the CH4
sensor)
CO2 - carbon dioxide
the measurement range for
carbon dioxide is displayed:
0.00 – 5.00 %VOL
depending on your last setting
a display in the %VOL, %GAZ
quantities may be possible
(cf. section 7.7: Setting the
measurement quantity)
O2 - oxygen
the measurement range for
oxygen is displayed:
0.0 – 25.0 %VOL
depending on your last setting
a display in the %VOL, %GAZ
quantities may be possible
(cf. section 7.7: Setting the
measurement quantity)
display of the sensor lifetime
in the form of bars (cf. section
11.2: Technical data):
8 bars = 100 %
3 Measuring operation
H2S - hydrogen sulphide
the measurement range for
hydrogen sulphide is displayed:
0 – 100 PPM
display of the sensor lifetime
in the form of bars (cf. section
11.2: Technical data):
8 bars = 100 %
CO - carbon monoxide
the measurement range for
carbon monoxide is displayed:
0 – 500 PPM
display of the sensor lifetime
in the form of bars (cf. section
11.2: Technical data):
8 bars = 100 %
Time/date
the current time (e.g.17:49)
and date (e.g. 24.02.2000) are
displayed
properly-set values are impor-
tant for the documentation of
your readings
you can correct any variances
(cf. section 9.2: Setting the
date/time)
11
12
3 Measuring operation
Next scheduled inspection
(display optional)
if you have set an inspection
interval, the next scheduled
inspection (e.g. 17.04.2000) is
displayed for about 3 seconds
(cf. section 9.3: Setting the
inspection interval)
depending on the date and
set schedule, the interval or
continuous alarm may also be
triggered (items 1 and 7)
clearing the alarm with the
buzzer key or waiting for 15
seconds switches to measuring
operation
Note:
If the EX-TEC Combi now automatically switches
off, the inspection date has passed with the inspection block switched on (cf. section 9.4: Setting the
inspection block).
The instrument does not revert to measuring operation until an inspection has been carried out and
confirmed.
3.3 Modes
GAS-WARNING mode
Monitoring the atmosphere in shafts and chambers (cf. section 1.2: Fields of application)
CH4 - CO2 - O2 - H2S - CO
3 Measuring operation
im m edi at ely af t er bei ng
switched on the EX-TEC Combi
is always in warning mode
Indication:
all a la r m t hr es h ol ds ar e
activated
Indication:
each avail able gas is dis-
played for about 3 seconds
before switching to the next
Sequence:
Every 5 seconds an operating
signal is activated as a marker.
It is both, acoustic (item 7) and
optical (item 1). The optical
signal acts as a control that
the instrument is functioning
in gas-warning mode.
If the op e r a ting si g n al is
switched off, the monitoring
of the ga s conc e n t ra t i on
is no long er insur ed. The
endangered area must be left
immediately.
13
14
3 Measuring operation
GAS-MEASURING mode (⊗)
Determining gas concentrations (cf. section 1.2: Fields of
application)
pressing the operating-mode
key (instruments variant 2)
for about 3 seconds switches
between the two modes
on instruments variant 1, the
switching is carried out by
pressing the pump-key for
about 3 seconds
in this mode all alarm thresholds
and the operating signal are
switched off
the pump now runs at maxi-
mum power
NB: (no symbols)
each avail able gas is dis-
played for about 3 seconds
before switching to the next
Sequence:
CH4 - CO2 - O2 - H2S - CO
in this mode, depending on
the task at hand, you can also
switch the instrument‘s pump
on and off by briefly pressing
the pump-key
Note:
If you wish to use the EX-TEC Combi purely as a warn-
ing device, you can deactivate GAS-MEASURING
mode (cf. section 9.5: Setting the 100 vol.% range)!
3.4 Switching gases
3 Measuring operation
repeatedly pressing the hand
key toggles between automatic and manual gas-type
switching
Automatic switching
each avail able gas is dis-
played for about 3 seconds
before switching to the next:
Sequence:
CH4 - CO2 - O2 - H2S - CO
Manual switching
each gas is displayed until a
arrow key is pressed
pressing a arrow key then
switches to the next gas:
Sequence (cursor up):
CH4 - CO2 - O2 - H2S - CO
Note:
In WARNING mode automatic switching always
has priority!
If the instrument is in manual switching mode and
no key has been pressed for about 10 seconds, it
shifts back to automatic switching!
15
16
3 Measuring operation
3.5 Alarms
The „Technical Rules for Hazardous Substances (TRGS 402 and
900)“ require certain limit values to be monitored and adhered to
in the air in the workplace.
In WARNING mode only the EX-TEC Combi thus has three
different types of alarm: one optical (item 1), one acoustic (item
7) and one that takes the form of the LCD illumination (item 2)
switching on:
AL1, AL2, AL3 The instantaneous value alarm appears with
KZW The short-term value alarm appears with toxic
LZW The long-term value alarm appears with
all gases:
CH4 - CO2 - O2 - H2S - CO
when the measured gas concentration
exceeds or falls below a fixed threshold
value.
gases:
CO2 - H2S - CO
when the gas concentration averaged over an
adjustable time period (e.g. 15 minutes) has
exceeded an assessed limit value.
toxic gases:
CO2 - H2S - CO
when the gas concentration averaged over
an 8-hour working shift has exceeded a fixed
limit value.
3 Measuring operation
3.6 Instantaneous value alarms (AL1, AL2, AL3)
when in gas-warning mode
the EX-TEC Combi is constantly in alarm readiness
this is displayed in the LCD
by two symbols: Ex-area and
alarm threshold
the alarm is triggered as soon
as a threshold is breached
Display of alarm thresholds
holding down the threshold
value key displays the set
alarm thresholds for the pertinent gas
Methane CH
alarm thresholds (factory set-
4
tings):
AL1 = 0.90 %VOL = 20 %LEL
AL2 = 2.20 %VOL = 50 %LEL
Carbon dioxide CO
alarm thresholds (factory set-
4
tings):
AL1 = 0.50 %VOL (MAK value)
AL2 = 1.00 %VOL
17
18
3 Measuring operation
Oxygen O
alarm thresholds (factory set-
2
tings):
AL1 = 18.0 %VOL
AL2 = 23.0 %VOL
the AL1 alarm threshold is
triggered when the value falls
below the threshold
Hydrogen sulphide H2S
alarm thresholds (factory set-
tings):
AL1 = 10 PPM (MAK value)
AL2 = 20 PPM
Carbon monoxide CO
alarm thresholds (factory set-
tings):
AL1 = 30 PPM (MAK value)
AL2 = 60 PPM
Note:
You can alter the factory-set thresholds to your own
individual limits (cf. section 9.7: Setting the alarm
thresholds)!
Triggering the alarm thresholds
AL1 alarm (Example: CH4)
AL2 alarm (Example: CH4)
3 Measuring operation
exceeding this alarm threshold
triggers:
- the optical alarm (item 1)
- the acoustic alarm (item 7)
- the appearance of AL1 in
the LCD
the interval tone is clearly dis-
tinguishable from the operating
signal
the AL1 alarm can be cleared,
th e optical ala rm (it em 1)
persists
if the concentration falls below
this alarm threshold, the optical and acoustic alarms (items
1 and 7) switch off
exceeding this alarm threshold
triggers:
- the optical alarm (item 1)
- the acoustic alarm (item 7)
- the appearance of AL2 in
the LCD
the continuous tone is clearly
distinguishable from the operating signal
the AL 2 alarm cannot be
cleared
if the concentration falls below this alarm threshold, the
alarm that sounds (AL1) can
be cleared
19
20
3 Measuring operation
AL3 alarm (Example: CH4)
if the end of the measurement
range is exceeded, the optical
and acoustic alarms (items 1
and 7) are triggered and AL3
appears in the LCD
the continuous tone is clearly
distinguishable from the operating signal
the AL 3 alarm cannot be
cleared either
if the gas concetration falls be-
low the end of measurement
range, the AL3 alarm is reset
and the AL2 alarm activated
Note:
The AL3 alarm can be suppressed by switching
to GAS-MEASURING mode or switching off the
instrument!
Note:
In the GAS-WARNING mode, 0 – 100 %LEL methane
concetrations exceeding the upper measuring range
value can influence the accuracy of measurement.
After triggering the AL3 alarm in this measuring
range, the instrument must be inspected before any
further use (cf. section 5.1: Function testing, testing
display accuracy, maintenance). It is necessary to
repeat this operation the following days.
3 Measuring operation
Note:
In the GAS-WARNING mode the following remarks
should be observed during operation at degrees below zero, high temperatures and high humidity:
Degrees below zero lead to a diminished display
(up to 4 % LEL at -10 °C) at the zero-point of the
methane and propane sensor. This can be compensated by a correspondingly lower adjustment
of the alarm thresholds.
When adjusting the methane sensor with dry gas,
high temperatures and high relative humidity (> 90 %)
could lead to a diminished display (up to 30 % of
measuring value). This can be compensated by
a correspondingly lower adjustment of the alarm
thresholds.
Note:
After triggering the AL3 alarm in the CO- or H2Smeasuring range, the instrument must be inspected
before any further use (cf. section 5.1: Function
testing, testing display accuracy, maintenance).
21
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