sewerin Ex-Tec OD 4 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 perfor-
mance, safety and efciency. 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.: [phone]
Fax: [phone]
www.sewerin.com
[e-mail]
SEWERIN SARL
17, rue Ampère – BP 211
67727 HOERDT CEDEX, France
Tél. :[phone]
Fax :[phone]
www.sewerin.fr
[e-mail]
Sewerin Ltd
Hertfordshire
UK
Phone: [phone]
www.sewerin.co.uk
[e-mail]
SEWERIN IBERIA S.L.
Centro de Negocios “Eisenhower”
Avenida Sur del Aeropuerto
de Barajas 28, Of. 2.1 y 2.2
28042 Madrid, España
Tel.: [phone]
Fax: [phone]
www.sewerin.es
[e-mail]
Sewerin Sp.z o.o.
ul. Twórcza 79L/1
03-289 Warszawa, Polska
Tel.: [phone]
Faks: [phone]
Tel. kom. [phone]
www.sewerin.pl
[e-mail]

Illustration EX-TEC OD 4
EX-TEC OD 4
®
0.0
THT
mg
m3
Sensor head
Attachment
Alarm lamp
LCD
Buzzer
Keypad
Charging contacts

Illustration EX-TEC GM 4
EX-TEC GM 4
®
H2
PPM
1500
Sensor head
Attachment
Alarm lamp
LCD
Buzzer
Keypad
Charging contacts
H2
PPM
1500
Activation
Alarm thresholds Type of gas
Trend bar
Unit
Gas concentration
Battery state

Operating Instructions
20.04.2016 a – V1.XXX – 103955 – en
EX-TEC® OD 4/GM 4

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 com-
mercial use.
Repair work may only be carried out by specialists or by persons who have
undergone appropriate training.
Any alterations or modications 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 pro-
duct.
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 techni-
cal 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 ags information and hints extending
beyond the actual operation of the product .

I
Contents Page
1 EX-TEC OD 4/EX-TEC GM 4 system ......................................1
1.1 The EX-TEC OD 4 system ........................................................1
1.1.1 Before starting work ...............................................................1
1.1.2 The need for gas odorisation .................................................1
1.1.3 Measurement principle...........................................................1
1.1.4 Boundary conditions for measurement and sampling ..............2
1.1.5 EX-TEC OD 4............................................................................3
1.1.6 Test certicates ......................................................................4
1.2 EX-TEC GM 4 system...............................................................5
1.2.1 Test certicates ......................................................................5
2 Safety .......................................................................................6
2.1 Safety instructions.....................................................................6
3 Measuring operation...............................................................8
3.1 Switching on..............................................................................8
3.2 Operating modes..................................................................... 11
3.3 Alarms .....................................................................................16
3.4 Illumination and operating-hours display.................................18
3.5 Battery alarm...........................................................................18
3.6 Switching off............................................................................19
4 Charging and battery operation...........................................20
4.1 Charging and charge maintenance when using NiMH batteries ... 20
4.2 Self-dischargeand battery care ...............................................22
4.3 Battery operation.....................................................................23
4.4 Instruments showing serial number 062 00 ............................24
5 Testing the instrument..........................................................25
5.1 Testing/upkeep ........................................................................25
5.2 Test set....................................................................................27
5.2.1 EX-TEC GM 4 ......................................................................27
5.2.2 EX-TEC OD 4.......................................................................28
5.3 Test gases ...............................................................................29
5.4 Testing the pump, zero point and display accuracy ................30

II
Contents Page
6 Info menu ...............................................................................33
6.1 Menu structure ........................................................................33
6.2 Overview .................................................................................34
7 Adjustment menu..................................................................36
7.1 Menu structure ........................................................................36
7.2 Sensor adjustment ..................................................................36
7.2.1 Setting the H2-sensor ...........................................................36
7.2.2 Setting the O2sensor ...........................................................37
7.3 Setting the test gas concentration...........................................38
7.4 Inspection conrmation ...........................................................40
7.5 Leaving the adjustment menu .................................................40
8 System menu.........................................................................41
8.1 Menu structure ........................................................................41
8.2 Setting the date and time ........................................................42
8.3 Setting the inspection intervall ................................................43
8.4 Setting the inspection block ....................................................46
8.5 Setting the PIN ........................................................................47
8.6 Setting the alarm thresholds ...................................................48
8.7 Setting the user name .............................................................51
8.8 Setting the language ...............................................................53
8.9 Leaving the system menu .......................................................53
9 Hardware menu .....................................................................54
9.1 Menu structure ........................................................................54
9.1.1 EX-TEC GM 4 ......................................................................54
9.1.2 EX-TEC OD 4.......................................................................55
9.2 Setting the battery type ...........................................................56
9.3 Setting the illumination time and contrast ...............................57
9.4 Autostart..................................................................................58
9.5 Range .....................................................................................59
9.6 Changing the sensor ...............................................................59
9.6.1 Gas.......................................................................................60
9.6.2 Sensor installation................................................................60
9.7 Setting pump operation ...........................................................61
9.8 Carrying out an LCD test.........................................................61

III
Contents Page
9.9 Restoring the factory settings..................................................62
9.10 Leaving the hardware menu....................................................63
10 Memory menu........................................................................64
10.1 Menu structure ........................................................................64
10.2 Clearing memory.....................................................................64
10.3 Setting the memory interval ....................................................65
10.4 Leaving the memory menu......................................................65
11 Technical aspects..................................................................66
11.1 Technical notes .......................................................................66
11.2 Technical data .........................................................................68
11.3 Error messages.......................................................................79
11.4 Consumables ..........................................................................80
11.5 Hints on Disposal ....................................................................81
12 Delivery variants and accessories ......................................82
12.1 Delivery variants......................................................................82
12.2 Accessories.............................................................................84
13 Appendix................................................................................90
13.1 EU-declaration of conformity...................................................90
13.2 Inspection protocol ..................................................................91
13.3 EX-TEC OD 4/GM 4 operating instructions in brief.................92

1
1 EX-TEC OD 4/EX-TEC GM 4 system
The EX-TEC OD 4 is a combined warning and measuring instru-
ment for determining odorant concentration. It is available with
either a THT or a TBM sensor.
The EX-TEC GM 4 is a warning and measuring instrument that
detects oxygen and various toxic gases.
1.1 The EX-TEC OD 4 system
1.1.1 Before starting work
Adequate gas odorisation is an important criterion for safe network
operation. Please take careful note of the following information.
1.1.2 The need for gas odorisation
Natural gas is odourless. So that even the smallest leaks in indoor
installations or elsewhere in a gas-distribution network can be
immediately detected, the gas is odorised: a strong-smelling sub-
stance is added to it. The substances used are organic sulphur
compounds and acrylates. The most widespread currently being
tetrahydrothiophene (THT) and tertiary butyl mercaptan (TBM).
DVGW worksheet G 280 sets the minimum values for odorant
concentration at 10 mg of THT / m3 and 3.8 mg of TBM / m3. This
worksheet also requires the operator of a distribution network to
check and document the odorant concentration at least once a
year.
1.1.3 Measurement principle
The EX-TEC OD 4 contains an electrochemical sensor that reacts
to the smallest traces of sulphur compounds. This produces elec-
trical signals, which are then processed by the integral electronic
system. The intensity of the signal varies directly with the strength
of the concentration.
1 EX-TEC OD 4/EX-TEC GM 4 system

2
1 EX-TEC OD 4/EX-TEC GM 4 system
The sensor is lled with a liquid (electrolyte), which makes it very
sensitive to high temperatures. The maximum storage tempera-
ture of 40 °C must therefore not be exceeded. Electrochemical
processes constantly take place inside the measurement cell,
requiring the EX-TEC OD 4 to be permanently supplied with bat-
tery power at an adequate voltage. For this reason the integral
batteries must not be permitted to reach a state of deep discharge.
When the instrument is not in use it should therefore be stored
in charge-maintenance operation (see section 4.1: Charging and
charge maintenance when using NiMH batteries).
1.1.4 Boundary conditions for measurement and sampling
As well as all sulphur compounds, the electrochemical measure-
ment cell also reacts very strongly to moisture. Even though this
is rarely important when carrying out measurements in a gas-
distribution network, operators should not blow through sampling
hoses to clear them.
When sampling it is essential to ensure that there are no connect-
ing pieces made of rubber or synthetic substances between the
EX-TEC OD 4 and the connection to the gas main unless these
consist of inert materials (e.g. Viton or nylon).
A further factor that affects the measurement of sulphur com-
pounds with the EX-TEC OD 4 is the ow rate through the mea-
surement chamber, which must always exceed 20 l/h. Only the
connection hoses supplied with the instrument should therefore
be used for sampling.

3
1 EX-TEC OD 4/EX-TEC GM 4 system
1.1.5 EX-TEC OD 4
The EX-TEC OD 4 is a hand-held
instrument for the measurement
of tetrahydrothiophene (THT) or
tertiary butyl mercaptan (TBM). It
is available in pump and diffusion
versions.
The following sensors are available:
Sensor range principle
THT 0 –100 mg/m3electrochemical
TBM 0 –100 mg/m3electrochemical

4
1 EX-TEC OD 4/EX-TEC GM 4 system
1.1.6 Testcerticates
Passive explosion protection
The EX-TEC OD 4 has been tested for explosion protection in
accordance with European norms (CENELEC):
EC prototype test certicate: TÜV 01 ATEX 1657
Identication: II2G Ex e ib IIB T4 Gb
Testing institution: TÜV NORD CERT GmbH,
Hannover

5
1 EX-TEC OD 4/EX-TEC GM 4 system
1.2 EX-TEC GM 4 system
The EX-TEC GM 4 is a gas-measurement and warning instru-
ment. It is available in pump and diffusion versions. A different
sensor is used for each gas.
The following electrochemical sensors are available:
Sensor range
Carbon monoxide CO 0 – 500 ppm
Hydrogen H2 0 – 1.0 vol.%
Hydrogen sulphide H2S 0 – 100 ppm
Hydrogen sulphide H2S 0 – 2000 ppm
Ammonia NH3 0 – 100 ppm
Oxygen O2 0 – 25 vol.%
Hydrogen chloride HCI 0 – 30 ppm
1.2.1 Testcerticates
Passive explosion protection
The EX-TEC GM 4 has been tested for explosion protection in
accordance with European norms (CENELEC):
EC prototype test certicate: TÜV 01 ATEX 1657
Identication 1: II2G Ex e ib IIB T4 Gb
basic instrument without
leather case for all gases
except hydrogen H2
Identication 2: II2G Ex e ib IIC T4 Gb
basic instrument with leather
case for all gases including
hydrogen H2
Testing institution: TÜV NORD CERT GmbH,
Hannover

6
2 Safety
2 Safety
2.1 Safety instructions
CAUTION!
Always use original SEWERIN accessories with the
EX-TEC OD 4/GM 4!
CAUTION!
Observe the permissible operating temperature
range of minus 10 °C to plus 40 °C!
(with some sensors the temperature range may be
wider - see section 11.2: Technical data)!
CAUTION!
The EX-TEC OD 4/GM 4 must not be recharged or
its battery compartment opened in areas exposed
to the danger of explosion!
CAUTION!
Test gases may only be used in well-ventilated
spaces!
CAUTION!
The EX-TEC OD 4/GM 4 satises the limits of the
EMV regulation. When using it near (mobile) radio
equipment please also observe the instructions in
the manuals for that equipment!

7
2 Safety
CAUTION!
Please note that when the EX-TEC OD 4/GM 4 is
in measuring operation the gas sample is released
into the ambient air through its outlet.
Special care must be taken to ensure that this does
not produce an explosive or toxic gas mixture, espe-
cially during use in conned spaces. It may therefore
be necessary to use a gas-warning device to monitor
the ambient air.
CAUTION!
The EX-TEC GM 4 with the hydrogen sulphide H2S
sensor (0 – 2000 ppm) is a pure measuring instru-
ment: the „warning“ operating mode is not available.
Please note that the human sense of smell fails at
concentrations of 100 ppm of H2S and above. Con-
centrations of over 500 ppm of H2S lead to very seri-
ous damage to health, uncoordinated movements,
unconsciousness, respiratory failure and death. It is
thus essential to ensure that the lower toxic limit of
10 ppm in the ambient air is not exceeded!
CAUTION!
When using the H2sensor the HG4 must be in its
leather case (to provide explosion protection)!

8
3 Measuring operation
3 Measuring operation
3.1 Switching on
Note:
This operating manual describes the functions
of software version 1.XXX. Other versions may
involve changes.In this event please consult any
page insertions.
zalways switch the instrument
on in „fresh air“
zhold the on/off key down for
about 3 seconds
zthe optical and acoustic control
signals (items 1 and 7) operate
for about 3 seconds
zthe LC display illumination
automatically switches on
zpump instruments: the inte-
gral pump runs at constant
power
Opening screen
zdisplay of:
- version number (V1.001)
- instrument type (GM 4)
- sensor type (H2)
27.11.2000
12:37
Stadtwerke GT
Heinz Muster
Abt. TDLL 24.4
V1.001
EX-TEC GM4
H2
Date/time
zdisplay of:
- date (27.11.2000)
- time (12:37)
- user name
zproperly-set values are impor-
tant for the documentation of
your readings

9
3 Measuring operation
zyou can correct any variances
(cf. section 8.2: Setting the
date/time)
Instrument settings
The EX-TEC OD 4/GM 4 defaults
to a set operating mode at switch-
on, which you can change (cf.
section 9.4: Autostart). The
operating mode is factory-set to
„Measurement“:
zdisplay of:
- battery-charge level
- gas (here: H2)
- operating mode
(here: measurement)
- range
(here: 0 – 1.00 vol.%)
Other possible settings can be
found in section 9.4: Autostart.
zdisplay of the day the sensor
was tted
zdisplay of expected sensor
life
Symbols
zavailable operating hours are
displayed (5 hours = 5 bars)
symbol: battery
zmeasurement is under way
(symbol eggtimer)
zall alarm thresholds are acti-
vated
symbol: alarm threshold
Sensor install.
12.06.2002
durability
24 Monate
H2
0...1,00 Vol%

10
3 Measuring operation
Next scheduled inspection
(display optional)
zif you have set an inspec-
tion interval, the next sched-
uled inspection date (e.g.
11.03.2004) is displayed for
about 3 seconds (cf. section
8.3: Setting the inspection
interval))
zdepending on the current and
inspection dates, the intermit-
tent or continuous alarm may
also be triggered (items 1
and 7)
zclearing the alarm with the
on/off key or waiting for 15
seconds switches to mea-
suring operation
Note:
If the EX-TEC OD 4/GM 4 now automatically
switches off, the inspection date has passed with
the inspection block switched on (cf. section 8.0:
System menu).
The instrument does not revert to measuring opera-
tion until an inspection has been carried out and
conrmed.

11
3 Measuring operation
3.2 Operating modes
WARNING
zWarning of high gas concentration in buildings and the work-
ing environment
zTesting enclosed spaces
zall alarm thresholds are acti-
vated
NB:
zthe current gas concentration
is displayed:
- as a gure
(e.g.: 1500 PPM H2)
- as a trend bar
zevery 5 seconds an operating
signal - both acoustic (item 7)
and optical (item 1) - is emitted
to conrm that the instrument
in functioning in the warning
operating mode. If this ope-
rating signal is not emitted,
you cannot be sure that the
gas concentration is being
properly monitored and must
leave the endangered area
without delay.
H2
PPM
1500