sewerin Ex-Tec OD 4, Ex-Tec GM 4 Operating Instructions 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 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 Ltd

Hertfordshire
UK

Phone: [phone]

www.sewerin.co.uk
[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]

EX-TEC OD 4

®

0.0

THT

mg
m3

Sensor head

Attachment

Alarm lamp

LCD

Buzzer

Keypad

Charging contacts

Illustration EX-TEC OD 4

Illustration EX-TEC GM 4

Sensor head

Attachment

Alarm lamp

LCD

Buzzer

Keypad

Charging contacts

H2

Battery state

1500

EX-TEC GM 4

Activation

Alarm thresholds

1500

PPM

®

H2

PPM

Type of gas

Gas concentration
Unit

Trend bar

Operating Instructions

EX-TEC® OD 4/GM 4

20.04.2016 a – V1.XXX – 103955 – 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 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 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:

Note:

This symbol warns of dangers that may threaten
the safety of the user or maty damage or destroy
the product.

This symbol ags information and hints extending

beyond the actual operation of the product .

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

I

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 O2 sensor ...........................................................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

II

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

III

1 EX-TEC OD 4/EX-TEC GM 4 system

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 sub­stance 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

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 tempera­ture 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 bat­tery 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 measure­ment cell also reacts very strongly to moisture. Even though this

is rarely important when carrying out measurements in a gas­distribution network, operators should not blow through sampling
hoses to clear them.

When sampling it is essential to ensure that there are no connect­ing 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.

2

1.1.5 EX-TEC OD 4

The following sensors are available:

1 EX-TEC OD 4/EX-TEC GM 4 system

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.

Sensor

THT
TBM

range principle

0 –100 mg/m
0 –100 mg/m

3

3

electrochemical

electrochemical

3

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

4

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

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):

1 EX-TEC OD 4/EX-TEC GM 4 system

0 – 30 ppm

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 H

2

Identication 2: II2G Ex e ib IIC T4 Gb

basic instrument with leather
case for all gases including
hydrogen H

2

Testing institution: TÜV NORD CERT GmbH,

Hannover

5

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!

6

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. Con­centrations 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!

2 Safety

CAUTION!

When using the H2 sensor the HG4 must be in its
leather case (to provide explosion protection)!

7

3 Measuring operation

V1.001

EX-TEC GM4

H2

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.

z always switch the instrument

on in „fresh air“

z hold the on/off key down for

about 3 seconds

z the optical and acoustic control

signals (items 1 and 7) operate

for about 3 seconds

z the LC display illumination

automatically switches on

z pump instruments: the inte-

gral pump runs at constant
power

Opening screen

z display of:

- version number (V1.001)

- instrument type (GM 4)

- sensor type (H2)

8

27.11.2000
12:37

Stadtwerke GT
Heinz Muster
Abt. TDLL 24.4

Date/time

z display of:

- date (27.11.2000)

- time (12:37)

- user name

z properly-set values are impor-

tant for the documentation of
your readings

3 Measuring operation

Sensor install.

12.06.2002

durability

24 Monate

H2

0...1,00 Vol%

z you 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 switch­on, which you can change (cf.

section 9.4: Autostart). The

operating mode is factory-set to

„Measurement“:

z display 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.

z display of the day the sensor

was tted

z display of expected sensor

life

Symbols

z available operating hours are

displayed (5 hours = 5 bars)

symbol: battery

z measurement is under way

(symbol eggtimer)

z all alarm thresholds are acti-

vated

symbol: alarm threshold

9

3 Measuring operation

Next scheduled inspection

(display optional)

z if you have set an inspec-

tion interval, the next sched­uled inspection date (e.g.

11.03.2004) is displayed for

about 3 seconds (cf. section

8.3: Setting the inspection
interval))

z depending on the current and

inspection dates, the intermit­tent or continuous alarm may

also be triggered (items 1
and 7)

z clearing the alarm with the

on/off key or waiting for 15

seconds switches to mea­suring 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.

10

3.2 Operating modes

WARNING

z Warning of high gas concentration in buildings and the work-

ing environment

z Testing enclosed spaces

H2

1500

PPM

3 Measuring operation

z all alarm thresholds are acti-

vated

NB:

z the current gas concentration

is displayed:

- as a gure
(e.g.: 1500 PPM H2)

- as a trend bar

z every 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 ope­rating signal is not emitted,
you cannot be sure that the
gas concentration is being
properly monitored and must
leave the endangered area
without delay.

11

3 Measuring operation

H2

PPM

1500

MEASUREMENT

EX-TEC GM 4:

z Testing the gas concentration in buildings
z Measuring gas concentrations in pipes and elsewhere

z Searching for leaks in pipes in buildings

z Checking joints, e.g. weld seams

z Carrying out building tests

z Checking enclosed spaces

EX-TEC OD 4:

z Determining the odorant concentration in natural gas
z Measuring the odorant concentration in the air in odorising

plants

z Before sampling observe the sufcient ush of intake

z the current gas concentration

is displayed:

- as a gure
(e.g.: 1500 PPM H2)

- as a trend bar

12

Sampling hoses

To ensure that the sample always passes through the

EX-TEC OD 4 at an adequate rate, there are different sampling

hoses for each of the possible pressure ranges. These are colour­coded as follows:

Colour Pressure range Part-Nr.

black 20 – 50 mbar OD04-Z0100
blue 50 – 125 mbar OD04-Z0200
green 125 – 400 mbar OD04-Z0300
yellow 400 – 1000 mbar OD04-Z0400
red 1 – 2 bar OD04-Z0500
(further on request)

Measurements are only reliable if the original Sewerin-supplied

hoses are used.

Switching operating modet

H2

0...1,00 Vol%

H2

0...1,00 VOL%
AL1 0,4 VOL%
AL2 0,8 VOL%

pin point:

0001

pin point: 0001

02.07.02 13:58
1500 PPM

3 Measuring operation

z holding down one of the cursor

keys for about 2 seconds

brings you to operating mode
selection

z use the cursor keys to select

one of the items:

Zero point

in the currently selected mea-

surement range zero-point

correction can be carried out

if necessary (temporary zero-

point adjustment within certain

limits)

Warning

selects the WARNING ope­rating mode

Measurement

selects the MEASUREMENT
operating mode

1500

â

â

H2

PPM

Saving

The gas concentration meas­ured can be saved and
assigned to a measurement

location. After the number of

the measurement location
has been entered, the mea­surement location, date, time
and reading are displayed

together once again. These

data can subsequently be read
out and analysed with the PC
analysis software (available

separately).

13

3 Measuring operation

z then press the on/off key to

conrm your selection

Note:

If the selection is not conrmed with the on/off key,
the instrument reverts to its previous operating mode

after about 10 seconds!

14

3 Measuring operation

Starting measurement (only possible on the EX-TEC OD 4 in
the „Measurement“ operating mode)

z A measurement can also be started by briey pressing the

on/off key.

z Indication when measurement is under way: eggtimer

symbol.

z Measurement is halted on the expiry of the measurement dura-

tion (about 3.5 minutes) or when the reading has stabilised.

z When measurement is complete the reading can be assigned

to a measurement location and saved.

z These data can subsequently be read out and analysed with

the PC analysis software (available separately).

z If no measurement location is entered within 10 seconds, the

measurement is lost.

0.0

0.0

store

Yes

No

16.5

pin point: ----

5.4.2002 8:50

16.5

14.5

THT

mg
m3

THT

mg
m3

mg
m3

mg
m3

THT

mg
m3

Possibilities to start measuring:

1) choose menu and start measuring

2) press on-key shortly

Cancel measuring:

1) press on-key shortly

2) choose menu and stop measuring

pin point:

0

012

pin point: 0012

5.4.2002 8:50

mg

16.5

m3

Time-out: 60 seconds

Time-out: 10 seconds

Measuring value remains
for 20 seconds

15

3 Measuring operation

H2

AL1

VOL%

0,4

3.3 Alarms

In the WARNING operating mode the EX-TEC OD4/GM 4 has

various alarm thresholds:

EX-TEC OD 4

Example: TBM
AL1 alarm threshold 1 = 10 mg/m
AL2 alarm threshold 2 = 20 mg/m3

EX-TEC GM 4

Example: H2 (factory setting)
AL1 alarm threshold 1 = 4000 ppm
AL2 alarm threshold 2 = 8000 ppm

3

AL1 alarm (example: H2)

z if this alarm threshold is

exceeded, the result is:

- optical alarm (item 1)

- acoustic alarm (item 7) at
2 Hz

- LCD (item 2) lights up

- AL1 appears in the LCD

z the 2 Hz intermittent tone is

quite different from the ope­rating signal

z the acoustic AL1 alarm can

be cleared by briey pressing

the on/off key, but the optical

alarm (item 1) continues

z if the concentration falls below

this alarm threshold, the opti­cal and acoustic alarms (items

1 and 7) switch off

16

3 Measuring operation

H2

AL2

VOL%

0,8

AL2-alarm (example: H2)

z if this alarm threshold is

exceeded, the result is:

- optical alarm (item 1)

- acoustic alarm (item 7) at

5 Hz

- LCD (item 2) lights up

- AL2 appears in the LCD

z the rapid intermittent tone at

5 Hz is quite different from the

operating signal

z the AL2 alarm cannot be

cleared

z if the concentration falls below

this alarm threshold, the alarm

becomes an AL1 alarm, which

can be cleared

17

3 Measuring operation

0

3.4 Illumination and operating-hours display

z pressing any key switches the

LCD illumination on

z ou can also adjust the illumina-

tion time individually (cf. sec-

tion 9: Hardware menu)

z when the illumination comes

on the remaining operating
hours (e.g. 5 hours) are dis­played

z this display (battery symbol

and bars) and the illumination

switch off automatically after

about 10 seconds

z the battery symbol appears in

the LC display and the ope­rating signal sounds at twice
its normal rate

z you now have at least another

15 minutes' operating time

available

z after that the instrument must

be charged (cf. section 4:

Charging and battery opera-

tion)

1500

3.5 Battery alarm

H2

PPM

H2

PPM

18

3.6 Switching off

3 Measuring operation

z hold down the on/off key for

about 3 seconds

z the optical and acoustical

control signals (items 1 and

7) are activated for about 3

seconds

z remaining operating hours are

displayed in the form of the
battery symbol and bars (e.g.

5 hours = 5 bars)

19

4 Charging and battery operation

4 Charging and battery operation

CAUTION!

The EX-TEC OD 4/GM 4 must not be recharged or
its battery compartment opened in an area exposed
to the danger of explosion

4.1 Charging and charge maintenance when using NiMH batteries

Batteries should be approximately at room temperature for charging.

Charging

After 12 hours‘ charging the instrument has about 20 hours of oper-
ation with the pump running or about 50 hours of operation in diffu­sion operation.

The docking station HG4 is required for charging. It can be used
either in the workshop or in the emergency vehicle.

The docking station has the fol­lowing connections on its side:

z AC/DC adapter M4 for

100 – 240 V~

z Vehicle cable M4 12 V= mount-

ing

z Vehicle cable M4 12 V=

mobile

z Vehicle cable M4 24 V= mount-

ing

z You can operate up to 5 dock-

ing stations with one 100 – 240
V~ AC/DC adapter M4

z With more than 5 stations the

charg. volt.
too low

charg. volt.
too high

charging voltage is insufcient.
An error message is displayed

to that effect

z if you connect the docking sta-

tion directly to a 24-V network in

the vehicle, the voltage will be
too high for proper charging

20

4 Charging and battery operation

04

Place the EX-TEC OD 4/GM 4 in the docking station and a display

on the following lines appears:

z the instrument now has 5

operating hours left (= 5 bars)

and needs another 4 hours to
reach full charge

z if it is fully charged, all the bars

appear and the digital display
disappears

Charge maintenance

Once the instrument is fully charged, it switches automatically to
charge maintenance. It can be left in the docking station until the
next time it is needed.

21

4 Charging and battery operation

4.2 Self-dischargeand battery care

If the instrument is not placed in the charging adapter when it is

switched off, this will cause the nickel/metal-hydride battery to

self-discharge, reducing the remaining operating time.
After a maximum of 30 days the instrument indicates no remain-

ing operating hours and it must be recharged.

Note:
Brief periods of use and protracted disuse may in

the long term lead to the so-called „memory effect“,

which means that the actual battery capacity avai­lable is less than what is shown in the display.

You can counteract this by fully discharging the

EX-TEC OD 4/GM 4 regularly (e.g. once a month)

and then recharging it.

Switch the instrument on and place it in the docking

station. When it is fully discharged, charging begins
automatically. The entire process takes:

22

20 h (typical discharge, pump instrument)

+ 12 h (full charge)
= 32 h

4.3 Battery operation

charge aborted
Alcaline­battery

With new non-rechargeable alkaline batteries the EX-TEC OD 4/
GM 4 will operate for 20 hours with the pump running or 50 hours

in diffusion operation.

Changing the batteries

When the batteries need to be changed, the battery compartment

can be opened with the screwdriver supplied (the two lower screws

on the back of the instrument). Insert the new cells the right way
round (as marked) and close the battery compartment again.

Once the old batteries are removed the date and time are pre­served in the instrument for about 120 seconds. If the battery
change takes longer than this, you will have to re-enter both values
next time it is switched on. No other data will be lost.

The value for the operating-hours display for nickel/metal-hydride

batteries is lost if these are replaced by alkaline batteries, so if

nickel/metal-hydride batteries are inserted again they must rst

be fully discharged and then recharged. This ensures that the
available operating hours will be correctly displayed.

4 Charging and battery operation

z An EX-TEC OD 4/GM 4 tted

with non-rechargeable alkaline
batteries cannot be charged.
If you try to do so a warning
message is displayed and the
instrument must be removed
from the docking station.

23

4 Charging and battery operation

4.4 Instruments showing serial number 062 00

WARNING!

To ensure that the device remains explosion-proof
as per ATEX 100a, only the following disposable/
rechargeable batteries may be used:

– Those supplied by SEWERIN,
– Others offered by SEWERIN, provided that

compliance with standard EN 60079-7:2003 (es­pecially chapter 5.7.2.1.17; explanation stated

below) is guaranteed.
The types used in a battery compartment must
always be identical in terms of sort (disposable/re­chargeable), capacity and manufacturer.

Disposable battery requirements

z Battery size: Mignon AA
z The creepage distance and air gap between the poles must

not be less than 0.5 mm in accordance with (EN 60079-7:2003;
Kap. 5.7.2.1.17).

z Alkaline batteries must comply with EN 60086-1 type LR6.

24

Rechargeable battery requirements

z Battery size: Mignon AA
z The creepage distance and air gap between the poles must

not be less than 0.5 mm in accordance with (EN 60079-7:2003;
Kap. 5.7.2.1.17).

z The accumulators must comply with DIN EN 61951-2 type HR6

and adhere to the temperature range.

CAUTION!

A device operated with disposable alkaline batteries
cannot be charged. A notice to this effect is shown

on the display.

The device comes with nickel metal hydride rechargeable batter­ies. The corresponding settings are saved.

5 Testing the instrument

5.1 Testing/upkeep

The required and prescribed instrument tests must be carried out
in accordance with the following norms:

z EN 50073 (Guidelines for the selection, installation, operation

and maintenance of instruments for the detection and mea-

surement of combustible gases and oxygen)

z EN 45544-4 (Electrical workplace-atmosphere instruments for

the direct detection and direct concentration measurement of

toxic gases and vapours, part 4: Guidelines for selection, in­stallation, operation and upkeep)

z BGI 518 (T023)
z DVGW worksheet G 465-4

The instrument tests prescribed by DVGW worksheet G 465-4
(Technical information, note) are divided into the following sec­tions. Testing also covers accessories used with the instru-

ments.

What ? Who ? When ?

function test user before use
display-accuracy

test (adjustment)

upkeep
(maintenance, re-

pair if necessary)

expert or special-

ist rm
SEWERIN, expert,

authorised special-

ist rm

5 Testing the instrument

daily to half-yearly

annually or when­ever a defect oc­curs

Function test

This is the simplest form of instrument test. Carried out by the
user before use, it comprises the following points:

z external condition including probe systems
z function of the operating controls
z function of the operating controls
z inspection of the pump and the intake channel
z pump function
z zero-point check

25

5 Testing the instrument

Checking display sensitivity (adjustment)

Testing frequency must be specied as a function of the sensors
tted and the use of the instrument. It can be anywhere between

daily and half-yearly.

Testing must be carried out by an expert on the operator‘s own
staff, by a specialist rm or by Sewerin itself.

The function test should be carried out at the same time.

Upkeep - maintenance and repair

The instrument must be maintained at least once a year by
SEWERIN Service, a specialist rm authorised by SEWERIN or
a SEWERIN-authorised expert.

Certicates must be issued accordingly.

The test disc on the instrument
conrms when maintenance was

last carried out and indicates the
next scheduled date.

26

Annual maintenance and repair must cover at least the specialist

care and adjustment of the instrument and the replacement of
components with a limited useful life.

Note:

Where instruments have explosion protection the
applicable regulations must be be observed!

Note:

Technicians responsible for upkeep must have been
trained and instructed by Sewerin!

5.2 Test set

The EX-TEC GM 4 and EX-TEC OD 4 each have their own test
sets.

5.2.1 EX-TEC GM 4

The test set SPE HG and SPE-Y check display accuracy:

C

B

E

5 Testing the instrument

D

A

Fig.: Test set SPE HG

Item. Description Function

A instrument hose

connection with:

z probe connection
z test heads

B test gas connection connection for:

z test gas cans
z pressure-hose adapter (in

conjunction with pressure
reducer

C pressure indication Display of actual pressure inside

the test gas can

D release key release of test gas
E connection hose connection with:

z instrument hose

27

5 Testing the instrument

5.2.2 EX-TEC OD 4

The test set SPE OD checks display accuracy:

E D

C

A

B

Fig.: Test set SPE OD

Item. Description Function

A instrument hose

connection with:

z probe connection
z test heads

B test gas connection connection for:

z test gas cans
z pressure-hose adapter (in

conjunction with pressure
cylinder and pressure reducer
reducer

C pressure indication Display of actual pressure inside

the test gas can

D release key release of test gas
E connection hose connection with:

z instrument hose

28

5.3 Test gases

The following test gases are used in conjunction with the test set

SPE HG/SPE OD to check the zero point and display accuracy
in the factory. Test gas concentrations other than those listed

here can also be used - see section 7.3: Setting the test gas

concentration.

Gas test gases

THT

-zero point

-sensitivity

TBM

-zero point

-sensitivity

Carbon monoxide CO

-zero point

-sensitivity

Hydrogen H2

-zero point

-sensitivity

Hydrogen sulphide H2S

-zero point

-sensitivity

Ammonia NH3

-zero point

-sensitivity

Oxygen O2

-zero point

-sensitivity

Hydrogen chloride HCI

-zero point

-sensitivity

5 Testing the instrument

fresh air

e. g. 15 mg/m3 in synthetic air

fresh air

z. B. 10 mg/m3 in synthetic air

fresh airt

z. B. 30 ppm in synthetic air

fresh air

1 % vol. in synthetic air
(0 – 100 ppm and 0 – 2000 ppm)

fresh airt

40 ppm in N

2

fresh air

50 ppm in N

100 % vol. CH4 or CO

2

2

fresh air

fresh air

5 ppm in synthetic air

29

5 Testing the instrument

5.4 Testing the pump, zero point and display accuracy

Pump (pump instruments only)

The power of the instrument‘s integral pump is 5 – 15 l/h. You

can function-test it by carrying out a simple impermeability test

as follows:

z swith the instrument on in fresh air

z place the test head on the EX-TEC OD 4/GM 4 and cover its

nipple with a nger

if the pump is working properly, error message F100 (cf. section

11.3: Error messages) appears after about 10 seconds
This error message is triggered if the volume ow falls below

half its nominal level.

The error message can be cleared by holding down any key.

z we recommend, replacing the pump lter of pump instruments

on a regular basis (cf. section 11.4: Consumables).

Changing the pump lter with the EX-TEC OD 4/GM 4

switched off:

Undo and remove the sensor cap and extract the sensor from

its holder. Now remove the pump lter (the white disc 4 mm in
diameter) and replace it with a new one. The sensor (with rubber
seal) and sensor cap can now be replaced. Do not overtighten

the sensor cap screws.

30

For further testing proceed as follows:

z screw the selected test gas can by hand onto the test set you

are using as far as it will go

z EX-TEC GM 4: connect the test head HG4 to the hose of the

SPE HG or SPE-Y

z EX-TEC OD 4: connect the test and probe head OD4 (plug

connection) to the hose of the SPE OD

z enter your results in the test record (cf. appendix)

5 Testing the instrument

Zero point

wait for the instrument to warm up and reach a stable zero
point:

Gas tolerance
THT -1.0 mg/m3 – +1.0 mg/m

TBM -1.0 mg/m3 – +1.0 mg/m

3

3

Carbon monoxide CO -3 ppm – +3 pppm

Hydrogen H

2

-40 ppm – +40 ppm

Hydrogen sulphide H2S (0 –100 ppm or. 0 – 2000 ppm)

-3 ppm – +3 ppm or

-20 ppm – +20 ppm

Ammonia NH3 -3 ppm – +3 ppm

Oxygen O2 -0.5 % vol. – +0.5 % vol.
Hydrogen chloride HCI -1 ppm – +1 ppm

If display values are outside these tolerances the pertinent sensor

must be readjusted (cf. section 7: Adjustment menu).

31

5 Testing the instrument

Display accuracy

z EX-TEC GM 4: place the test head HG4 (without screws) on

the instrument and hold down the release key of the SPE HG

until the displayed concentration has reached a stable value.

z EX-TEC OD 4: place the test and probe head OD4 (plug

connection) (without screws) on the instrument and turn the

knob of the SPE OD. Now begin a measurement.
The display values given in this table must be reached when

the test gases listed in section 5.3 are administered.

Gas Toleranz
THT 90 % – 110 % of the test gas

TBM 90 % – 110 % of the test gas
Carbon monoxide CO 27 – 33 ppm

Hydrogen H

Hydrogen sulphide H2S (0 – 100 ppm or 0 – 2000 ppm)

Ammonia NH3 45 – 55 ppm

Oxygen O2 20.4 – 21.4 % vol.
Hydrogen chloride HCI 4.5 – 5.5 ppm

2

0.9 – 1.1 % vol.

36 ppm – 44 ppm or 20 – 60 ppm

32

If display values are outside these tolerances the pertinent sensor

must be readjusted (cf. section 7: Adjustment menu).

6 Info menu

6.1 Menu structure

measuring operation Info V1.000

PIN code adjustment 0 PPM or mg/m3

measuring operation

6 Info menu

conc. in PPM or mg/m3

test gas

inspection OK

exit

system Date/time

date format

INS interval

INS block

PIN code

AL1 alarm

AL2 alarm

unit VOL%

user name

language

exit

hardware battery

accu capacity

back light

contrast

autostart

level PPM

range

type of gas

sensor install.

pump

LCD test

reset

exit

memory clear

interval

exit

exit

33

6 Info menu

0

PPM

PIN 000

0

6.2 Overview

This is how to reach the Info menu during operation:

+

z simultaneously press both

cursor keys for about 2 sec-
onds

z NB: on pump instruments

the integral pump continues to
run at constant power

z you are now on the INFO menu

item (cf. menu structure)

z you must now enter your PIN

(cf. section 8.5: Setting the
PIN):

- factory setting = 0001

- pressing one of the cursor
keys changes the value of
the highlighted digit

- pressing the on/off key
saves this value

z only then do you have access

to all menu items

z you are now on the adjust-

ment menu item (cf. menu

structure)

34

Adjustment

6 Info menu

z press one of the cursor keys

to navigate within the Info
menu

This applies to all menu and

submenu areas

z press the on/off key to select

the highlighted submenu

z if you select the menu item

Back, the instrument reverts
to measuring operation

35

7 Adjustment menu

adjustment 0 PPM or mg/m3

adjustment

7 Adjustment menu

The adjustments described below relate to the H2 adjustment
on the EX-TEC GM 4. For other gases, use the test gases given

in section 5.3.
The O2 adjustment is covered explicitly in section 7.2.2. The

EX-TEC OD 4 is adjusted for THT or TBM as per the H2 adjust­ment, but the test set SPE OD is used with the test and probe

head OD4 (plug connection) and the connection hose supplied

with the test set has to used as well.

7.1 Menu structure

conc. in PPM or mg/m3

test gas

inspection OK

exit

7.2 Sensor adjustment

7.2.1 Setting the H2-sensor

0 ppm
This function resets the zero point:

z carry out the adjustment in fresh air

z wait for the displayed concentration to reach a stable value
z press the on/off key to conrm .

36

100 ppm
This function resets the display accuracy of the sensor:

z use the test set SPE HG, the test head HG4 and 100 ppm H2

test gas (cf. section 5: Testing the instrument)

z place (but do not screw) the test head on the EX-TEC GM 4

and hold the release key down until the displayed concentra­tion has reached a stable value.

z press the on/off key to conrm

7.2.2 Setting the O2 sensor

0 % vol.

z use the test set SPE HG, the test head HG4 and 100 % vol.

CH4 or CO2 test gas (cf. section 5: Testing the instrument)

z place (but do not screw) the test head on the EX-TEC GM 4

and hold the release key down until the displayed concentra­tion has reached a stable value.

z press the on/off key to conrm

7 Adjustment menu

20.9 % vol.

z carry out the adjustment in „fresh air“

z wait for the displayed concentration to reach a stable value.
z press the on/off key to conrm .

37

7 Adjustment menu

test gas

PPM 0100

0

7.3 Setting the test gas concentration

If you use test gases other than those supplied by SEWERIN
(cf. section 5.3: Test gases), the concentration must be set ac-

cordingly.

Test gas

z briey pressing the on/off key

brings you to the test gas ad­justment for the ppm-range

z the current concentration is

displayed, e.g. the factory

setting:

100 PPM (... for hydrogen H2)

z you can enter the required

concentration digit by digit by
pressing one of the cursor

keys and pressing the on/off
key to conrm

38

7 Adjustment menu

The adjustment ranges of the individual test gases are:

THT

-adjustment range 10 – 50 mg/m

-increment 0.5 mg/m

3

3

TBM

-adjustment range 5 – 50 mg/m

-increment 0.5 mg/m

3

3

Carbon monoxide CO

-adjustment range 10 – 50 ppm

-increment 1 ppm

Hydrogen H

2

-adjustment range 100 – 10,000 ppm

-increment 20 ppm

Hydrogen sulphide H2S (0 – 100 ppm)

-adjustment range 10 – 100 ppm

-increment 1 ppm

Hydrogen sulphide H2S (0 – 2,000 ppm)

-adjustment range 40 – 2,000 ppm

-increment 10 ppm

Ammonia NH3

-adjustment range 50 – 100 ppm

-increment 1 ppm

Oxygen O2

-adjustment range 17.0 – 22.0 % vol.

-increment 0.1 % vol.

Hydrogen chloride HCI

-adjustment range 10 – 25 ppm

-increment 0.5 ppm

39

7 Adjustment menu

7.4 Inspectionconrmation

Inspection OK

In this function you conrm the inspection or adjustment you
have carried out by pressing the on/off key:

z this date is stored as a function of the set date (cf. section 8.2:

Setting the date/time)

z the next inspection or adjustment date is calculated in accord-

ance with the set inspection interval (cf. section 8.3: Setting
the inspection interval)

7.5 Leaving the adjustment menu

Back
This function switches you back to the Info menu:

z press the on/off key to conrm .

40

system date/time 29.01.2001 11:10

system

8 System menu

8.1 Menu structure

8 System menu

date format DD.MM.YYYY

INS interval week 00

INS block no

PIN code PIN 0001

AL1 alarm conc. in PPM or mg/m3

AL2 alarm conc. in PPM or mg/m3

unit VOL% VOL%

user name Gasversorgung

language Deutsch

exit

YYYY-MM-DD

yes

%VOL

%GAZ

Musterstadt

Otto Mustermann

English

Français

Italiano

41

date/time

3.07.2001 18:18

2

Nullpunkt

date format

DD.MM.YYYY

YYYY-MM-DD

8 System menu

8.2 Setting the date and time

This function sets the current date and the current time:

Date format
This function sets the date display format:

z the date and time are dis-

played

z press one of the cursor keys

to change the value of the
highlighted digit to the current
value

z press the on/off key to save

the value of the highlighted
digit

DD.MM.YYYY

(e.g.: 31.01.2001)

YYYY-MM-DD

(e.g.: 2001-01-31)

z press one of the cursor keys

to select one of the settings:

z press the on/off key to save

the selected setting

42

8.3 Setting the inspection intervall

The EX-TEC OD 4/GM 4 can remind you of scheduled inspection
and adjustment dates. This reminder is based on the inspection
interval:

INS interval

weeks 0

0

8 System menu

z the last interval to be set is

displayed

z press one of the cursor keys

to change the interval in week-

ly increments (range: 0 – 52
weeks)

z press the on/off key to save

the set interval

43

8 System menu

Example: inspection interval

How does the instrument indicate an inspection date?
1 week before (02. 03. 2004 - 08. 03. 2004)

Inspection

next week

During inspection period (09. 03. 2004 - 15. 03. 2004)

Inspection

necessary

selected inspection interval:

04 weeks

inspection routine started

(i.e. inspection conrmed, see chapter 7.4):

10.02.2004

from these settings follows:

the next inspection has to be effected be­tween 09. - 15.03.2004.

LCD:
When switched-on a hint on the ap-

proaching inspection appears (as 4.

picture) for approx. 3 secs.

lamp/buzzer:

inactive

instrument:

the instrument then automatically switch­es to measuring operation

LCD:

When switched-on a hint on the due
inspection appears (as 4. picture) for ap­prox. 10 secs.

lamp/buzzer:

interval light/sound

instrument:
the instrument then automatically switch­es to measuring operation

z by pressing ON/OFF key

OR

z automatically after 10 seconds

44

8 System menu

after exceeding inspection period (ab 16. 03. 2004)

Inspection

overtime

LCD:
When switched-on a hint on the overdue
inspection appears (as 4. picture) for ap-

prox. 10 secs.

lamp/buzzer:

permanent light/sound

instrument:
type of reaction depends on function set­ting INS lock (see chapter 8.4)

Lock active (INS lock = yes)

instrument switches off

z by pressing the ON/OFF key or one

of the cursor keys

OR

z automatically after 10 seconds

Lock deactivated (INS lock = no)

instrument switches to measuring
operation

z by pressing ON/OFF key

OR

z automatically after 10 seconds

How does the instrument deteremine the next inspection
date?

After an inspection has been effected, it has to be conrmed (see
chapter 7.4). Thereby the internal inspection routine is started

again.

Example:

Inspection effected 11. 03.2004
Inspection conrmed 11. 03.2004

Inspection interval 4 weeks (see previous page)

Next
inspection period 08. 04. 2004 – 14. 04. 2004

45

8 System menu

INS block

No

Yes

8.4 Setting the inspection block

You can activate an inspection block to make sure your EX-TEC
OD 4/GM 4 is regularly checked. This block does not become

active until the next inspection date has passed (cf. section 8.3:
Setting the inspection interval)..

After that the instrument cannot be operated until the inspection
has been carriedoutandconrmed (cf. section 7.4: Inspection
conrmation):

z briey pressing the on/off key

brings you to the inspection­block routine

z the last setting is displayed,

e.g.:

No = block inactive
Yes = block active

z you can set the desired con-

dition by pressing one of the

cursor keys and conrming

with the on/off key

46

PIN 001

0

PIN code

8.5 Setting the PIN

You can set up your EX-TEC OD 4/GM 4 so that only authorised
persons, e.g. instrument technicians and experts, have access

to the information menu with all its subfunctions. This involves

setting a PIN that must be entered every time the information
menu is called.

When an incorrect PIN is entered the instrument reverts to its
switch-on routine:

PIN = 0000

the function is inactive, every user has access to the Info menu

PIN = 0001 – 9999

the function is active, only persons who know the set PIN have
access to the Info menu

8 System menu

z briey pressing the on/off key

brings you to the PIN-setting
routine

z the last PIN to be set (0001 =

factory setting) appears in the
LC display

z we recommend you to use a

different PIN

z by pressing or holding down

one of the cursor keys and

and conrming with the on/off
key you can set each of the 4

digits from left to right to the
desired PIN

Note:

Make a note of your PIN and only give it to authorised
persons!
If you forget your PIN, please contact SEWERIN
service!

47

8 System menu

AL1 alarm

PPM 4000

0

AL2 alarm

PPM 8000

0

8.6 Setting the alarm thresholds

Alarm thresholds other than those pre-set by SEWERIN can be

set as follows.

AL1-alarm

AL2-alarm

z briey pressing the on/off key

brings you to the AL1 alarm

threshold routine

z the current alarm threshold is

displayed, e.g. the factory set­ting for H2: 4000 PPM

z press one of the cursor keys

to set the desired threshold
and the on/off key to conrm

z briey pressing the on/off key

brings you to the AL2 alarm

threshold routine

z the current alarm threshold is

displayed, e.g. the factory set­ting for H2: 8000 PPM

48

z press one of the cursor keys

to set the desired threshold
and the on/off key to conrm

8 System menu

The AL1 threshold is always lower than the AL2 threshold. The

adjustment ranges of the individual alarm thresholds (factory
settings in bold) are as follows:

Gas AL1 threshold AL2 threshold

THT/TBM

-adjustment range

-increment

CO

-adjustment range

-increment

H

2

-adjustment range

-increment

H2S (0 – 100 ppm)

-adjustment range

-increment

NH

3

-adjustment range

-increment

O

2

-adjustment range

-increment

HCI

-adjustment range

-increment

0.1 – 20.0 mg/m

0.1 mg/m

3

30 ppm

5 – 199 ppm
1 ppm

0.4 % vol.

40 – 9.980 ppm
1 ppm

10 ppm

5 – 99 ppm
1 ppm

20 ppm

1 – 99 ppm
1 ppm

18.0 % vol.

15.0 – 24.9 % vol.

0.1% vol.

5 ppm

9.5 ppm

0.5 ppm

3

20.1 – 100.0 mg/m
0,1 mg/m

60 ppm

6 – 200 ppm
1 ppm

0.8 % vol.

60 – 10.000 ppm
1 ppm

20 ppm

6 – 100 ppm
1 ppm

150 ppm

2 – 100 ppm
1 ppm

23.0 % vol.

15.1 – 25.0 % vol.
0,1 % vol.

10 ppm

1.0 – 10 ppm

0.5 ppm

3

3

49

8 System menu

unit VOL%

%GAZ
%Vol

VOL%

% vol. unit

z briey pressing the on/off key

brings you to the volume-unit
setting routine

z he current setting is displayed,

e.g.:

VOL% - display in VOL% (D/GB)
%VOL - display in VOL% (I)
%GAZ - display in %GAZ (F)

z press one of the cursor keys

to set the required unit and the

on/off key to conrm

50

8.7 Setting the user name

You can also enter your name, your department or other personal
information in the EX-TEC OD 4/GM 4. These will then be dis-
played every time the instrument is switched on to avoid doubt
about who it is assigned to.

Three lines of 16 characters each are available for entries, e.g.:

Gassupply - line 1
Anytown - line 2

Otto Mustermann - line 3

User name

The user name is entered with buttons and . All existing
signs must be conrmed.

There are two possibilities of entering:

1. possibility: new entry, no existing sign to be overwritten.

Entry starts with a blanc „ „.
Letters A - Z can be chosen in alphabetical order with button

.

After reaching letter Z the menu starts again with letter A.
Letters Z - A can be chosen downwards with button .
After letter A the additional characters

@>=<;:9876543210/.-,+*)(‚&%$#“ are displayed!

8 System menu

Note:

The additional characters can only be chosen with

button .

The chosen letter is conrmed with button .
The instrument automatically goes to the next letter.
After conrming the last letter of the user name, the instrument

returns to the system menu.

51

8 System menu

2. possibility: an existing letter has to be overwritten.

When switching to the letter, the already existing letter is dis­played.

The blanc appears when pressing button , thereafter letters
A - Z can be chosen as described on the previous page.

After reaching letter Z the menu starts again with letter A.
When pressing button the previous letter of the alphabet ap-

pears, all others appear in descending order.

After letter A the additional characters @>=<;:9876543210/.-,+*)
(‚&%$#“ are displayed!

The chosen letter is conrmed with the button.
The instrument automatically goes to the next letter.
After conrming the last letter of the user name, the instrument

returns to the system menu.

Note:

It could occur that during entry blancs a displayed

by a black block. This only happens in entry mode.
The actual display shows the correct blancs.

52

language

Englisch
Fran ais
Italiano

ç

Deutsch

system

exit

AL1 alarm
AL2 alarm
unit VOL%
user name
language

8.8 Setting the language

You can set the language of the individual menu items:

8.9 Leaving the system menu

8 System menu

z briey pressing the on/off key

brings you to the language­setting routine

z the available settings are

displayed

z press one of the cursor keys

to set the required language
and the on/off key to conrm

z this function switches back to

the Info menu

z press the on/off key to con-

rm

53

9 Hardware menu

hardware battery accu NiMH

hardware

9 Hardware menu

9.1 Menu structure

9.1.1 EX-TEC GM 4

Alkaline

accu capacity mAh 1100...2300

back light sec. 010

contrast 55%

autostart warning

range PPM

type of gas CO 300 PPM

sensor install. 12.06.2002

pump yes

LCD test

reset no

exit

measuring

mg/m3

10000 PPM

H

2

S 100 PPM

H

2

S 2000 PPM

H

2

100 PPM

NH

3

25.0 Vol%

O

2

no

yes

54

9.1.2 EX-TEC OD 4

hardware battery accu NiMH

hardware

9 Hardware menu

Alkaline

accu capacity mAh 1100...2300

back light sec. 010

contrast 55%

autostart warning

range PPM

type of gas THT 0...100 mg/m3

sensor install. 12.06.2002

pump yes

LCD test

reset no

exit

measuring

mg/m3

TBM 0...100 mg/m3

no

yes

55

9 Hardware menu

0..10000 PPM

battery

Accu NiMH

Alcaline

NullpunktNullpunkt

Accu capacity

mAh 1600

1

9.2 Setting the battery type

The EX-TEC OD 4/GM 4 can be operated with both rechargeable
and non-rechargeable batteries (primary cells).

For the correct display of operating hours it is important for the

current battery type to be properly set:

If you have selected NiMH as the battery type, you can enter the
capacity (see the information on the battery itself):

z the last battery type set is dis-

played

z press one of the cursor keys

to select between settings:

NiMH batteries

(rechargeable)

alkaline batteries

(non-rechargeable)

z press the on/off key to save

the battery type set

z the last value set is displayed

56

z press the cursor keys to

change the value

(range: 1100 – 2300 mAh)

z press the on/off key to save

the set value

contrast

22 %

back light

sec. 10

0

9.3 Setting the illumination time and contrast

During measuring operation the LCD illumination can be switched
on by pressing any key (cf. section 3.4: Illumination and ope­rating-hours display).

The period for which the illumination stays on can be set indi­vidually:

z the last period set is dis-

played

z press the cursor keys to

change the value in seconds

(range: 10 – 240 seconds)

z press the on/off key to save

the set value

The contrast of the LCD can be set individually:

z the last contrast set is dis-

played

9 Hardware menu

z press one of the cursor keys

to change the value in percent

(range: 0 – 100 %); 55 % is a

good working value

z press the on/off key to save

the set value

57

9 Hardware menu

autostart

warning
measuring

9.4 Autostart

The EX-TEC OD 4/GM 4 enables you to set the default operating
mode after switch-on. This function is preserved even when the

instrument is switched off.

z briey pressing the on/off key

brings you to the Autostart

routine

z the last set operating mode

is highlighted, e.g. the factory

setting „Measurement“

z press one of the cursor keys

to select one of the Autostart

functions

z briey press the on/off key to

conrm the selected Autostart

function

58

range

PPM

mg/m3

9.5 Range

The EX-TEC OD 4/GM 4 enables you to dene the measurement

units for some gases.

With THT/TBM sensors, for example, you can switch between a

display in ppm and mg/m3.

9.6 Changing the sensor

The sensor in the EX-TEC GM 4 can be changed. The following
sensors are available: CO, H2, H2S (100 ppm), H2S (2000 ppm),

NH3, O2 and HCl.
Sensors not in use have to be stored in a special storage box.

9 Hardware menu

z briey pressing the on/off key

brings you to the Autostart

routine

z the last set unit is highlighted

z press one of the cursor keys

to select one of the measure­ment units

Note:

The sensor in the EX-TEC OD 4 cannot be changed,
and if an EX-TEC GM 4 is tted with an HCl sensor
that cannot be changed either.

When you have changed the sensor you must enter the gas type
and then the date on which the sensor was tted.

CAUTION!

Whenever you change a sensor, you must readjust

the instrument following a suitable test routine (see

section 7).

59

9 Hardware menu

sensor install.

12.06.2002

type of gas

CO 300 PPM

H2 10000 PPM

9.6.1 Gas

9.6.2 Sensor installation

The sensor installation date can be entered.

z briey pressing the on/off key

brings you to the gas-setting
routine

z the possible sensors are dis-

played

z press one of the cursor keys to

select one of the sensors

z briefly pressing the on/off

key brings you to the sensor
installation-date routine

z the date when the sensor was

installed is displayed

60

z press one of the cursor keys

to enter the date and the on/

off key to conrm

pump

No

Yes

9.7 Setting pump operation

This function only applies to pump instruments. Pump instruments

have the letter P on the identication sticker on the back.

If the pump of an EX-TEC OD 4/GM 4 (pump) fails, you can switch
it off and continue to use it as a diffusion instrument (though the

probes cannot be used):

9.8 Carrying out an LCD test

The LCD of your EX-TEC OD 4/GM 4 has a matrix display. This

test checks whether it is fully functional.

The test pattern that it generates enables the failure of individual

pixels to be rapidly detected.

9 Hardware menu

z the last set condition is dis-

played

z press one of the cursor keys

to select one of the condi-

tions:

Yes (pump active)
No (pump inactive)

z press the on/off key to save

the set condition

z briey pressing the on/off key

starts the LCD test

61

9 Hardware menu

9.9 Restoring the factory settings

If all instrument settings (e.g. gas, sensor type, pump condition,

contrast, illumination time etc.) have become totally disordered,
the EX-TEC OD 4/GM 4 can be restored to a dened initial state
(factory setting):

CAUTION!

„After the instrument has been restored to its original
settings, the adjustment must be checked!“

z the date of the last restora-

tion to factory settings is dis­played

z press one of the cursor keys

to select one of the options:

No leave settings as they

are

Yes restore factory settings

z press the on/off key to conrm

the selected option

62

9.10 Leaving the hardware menu

This function switches back to the Info menu:

9 Hardware menu

z press the on/off key to con-

rm

63

10 Memory menu

memory clear

memory

10 Memory menu

10.1 Menu structure

10.2 Clearing memory

interval

exit

z this function clears all saved

readings

z press one of the cursor keys

to select one of the options:

No leave the memory con-

tent as it is

Yes clear all saved read-

ings

64

z press the on/off key to conrm

the selected option.

interval

5 sec.

10.3 Setting the memory interval

Data-memory capacity

Interval capacity

1 s typ. 7 h
2 s typ. 15 h

5 s typ. 39 h
10 s typ. 78 h
20 s typ. 156 h
30 s typ. 234 h
60 s typ. 470 h

10 Memory menu

z you can set the frequency at

which readings are saved,

e.g.:
5 sec (factory setting)
readings are saved every 5

seconds

z press one of the cursor keys

to change the value

z press the on/off key to save

the new value

10.4 Leaving the memory menu

This function switches back to the Info menu:

z press the on/off key to con-

rm

65

11 Technical aspects

11 Technical aspects

11.1 Technical notes

Identicationsticker

The identication sticker on the back of the instrument includes
a pictogram of a crossed-out screwdriver. This means that the

battery compartment may not be opened in an area exposed to
the danger of explosion.

Notes

If the EX-TEX OD 4 is not left in the docking station after
charging, it will have to be fully recharged again after 4 weeks
at the most.

If the instrument will not switch on because of lack of power, char­ge it up and recalibrate it after a 3-day recovery period.

66

Accessories

The instrument accessories fall into three main groups: charging
equipment, test equipment and sampling hoses (see section 12.2
„Accessories“).

Cleaning

The instrument should only be cleaned with a damp cloth: use
no solvents, benzene, silcon-containing Cockpit-Spray or similar

substances.

11 Technical aspects

Static charge

Electrostatic charges should generally be avoided. Electrostatical­ly oating objects (like metallic housings with no earth connection,
for example) are unprotected against charges transferred from

dust, aerosols and the like.

Battery change

After a change of batteries the EX-TEC OD 4 and the EX-TEC GM 4
with an HCl sensor require a minimum warm-up period of 15 mi-

nutes for a stable zero point to be reached.

67

11 Technical aspects

11.2 Technical data

Instrument data

- Dimensions (W x H x D) 60 x 144 x 35 mm

- Weight: about 300 g

EX-TEC GM 4 (Serial number)

- diffusion instrument: 062 00 (type - version - number)

- pump instrument: 062 01 (type - version - number)

EX-TEC OD 4 (Serial number THT)

- diffusion instrument: 062 02 (type - version - number)

- pump instrument: 062 03 (type - version - number)

EX-TEC OD 4 (Serial number TBM)

- diffusion instrument: 062 04 (type - version - number)

- pump instrument: 062 05 ((type - version - number)

Explosion protection (CENELEC)

- Testing institution: TÜV NORD CERT GmbH, Hannover

- Test number: TÜV 01 ATEX 1657

- Identication 1:

- Identication 2:

II2G Ex e ib IIB T4 Gb

basic instrument without leather case
for all gases except hydrogen H

2

II2G Ex e ib IIC T4 Gb

basic instrument with leather case for
all gases including hydrogen H

2

68

Pump power

- negative pressure: > 150 mbar

- volume ow: typically 5 – 15 l/h

11 Technical aspects

Power supply

- Batteries: 3 rechargeable NiMH batteries or

3 alkaline primary cells

(cf. section 4.3: Battery operation)

- Charging voltage: 12 V=

- Charging current: 360 mA (pulsed)

- Charging period: about 12 hours (depending on battery

capacity)

Measurement
principle:

electrochemical measurement cell,
temperature compensation,

zero-point correction

Sensor life: see sensor data!

Operating time: 20 h (pump operation)

50 h (diffusion operation)
alarms and illumination reduce the op­erating time

Connection pressure
(EX-TEC OD 4)

20 mbar - 2 bar
(through different hoses: see page 12)

Operating and
storage temperature: see sensor data!

69

11 Technical aspects

THT sensor data

Measurement principle: electrochemical

Range: 0 – 100 mg/m

3

Response times (pump instruments):

t90< 210 sec

The use of probes increases response times!

Warm-up period: about 1 minute

Lifetime (depending on the ambient temperature):

- expected 18 months

Cross-sensitivity at 20 °C:

Gas Concentration Display

Carbon Dioxide CO2 5,000 ppm 0 mg/m3
Carbon Monoxide CO 100 ppm 2 mg/m3
Carbon Oxide Sulde

1 % vol. 10 mg/m3

(COS)
Ethylene C2H4 1 % vol. yes, not dened
Hydrocarbons 100 % vol. 0 mg/m3
Hydrogen H2 1 % vol. > 200 mg/m3
Hydrogen Sulde H2S 20 ppm 0 mg/3
Isopropanol C3H8O 200 ppm 400 mg/m3
Methane CH4 100 % vol. 0 mg/m3
Nitrogen N2 100 % vol. 0 mg/m3
Tert.-Butylmercaptane 10 mg/m3 10 mg/m3
Triethyleneglycol

ppm scale yes, not dened

C6H14O4

70

Operating temperature: -10 °C – +40 °C

Humidity: 10 – 95 % r.h., non-condensing

TBM sensor data

Measurement principle: electrochemical

11 Technical aspects

Range: 0 – 100 mg/m

3

Response times (pump instruments):

t90< 270 sec

The use of probes increases response times:

Warm-up period: about 1 minute

Lifetime:

expected 12 months

Cross-sensitivity at 20 °C:

Gas Concentration Display

Alcohols 1,000 ppm 0 ppm
Carbon Dioxide CO2 5,000 ppm 0 ppm
Carbon Monoxide CO 300 ppm 0 ppm

Hydrocarbons 100 % vol. 0 ppm
unsat. Hydrocarbons 1,000 ppm 0 ppm

Hydrochloric Acid HCI 10 ppm 0 ppm
Hydrogen H2 1,000 ppm 0 ppm
Hydrogen Sulde H2S 1 ppm 0 ppm
Nitrogen N2 100 % vol. 0 ppm
Nitrogen Dioxide NO2 1 ppm yes, not dened
Nitrogen Monoxide NO 10 ppm 0 ppm

Operating temperature: -10 °C – +40 °C

Humidity: 10 – 95 % r.h., non-condensing

71

11 Technical aspects

Carbon monoxide CO sensor data

Measurement principle: electrochemical

Range: 0 – 500 ppm

Response times (pump instruments):

The use of probes increases response times!

Warm-up period: about 1 minute

Lifetime (depending on ambient temperature):

- garanteed 24 months

- expected 36 months

Cross-sensitivity at 20 °C:

Gas Concentration Display

Alcohol 1,025 ppm 0 ppm
Ammonia 100 ppm 0 ppm

Carbon dioxide 10 % vol. 0 ppm
Chlorine or bromine 5 ppm 0 ppm

Benzene vapour 1 % vol. 0 ppm

Hydrogen 1,000 ppm 250 ppm
Hydrogen sulphide 20 ppm 0 ppm
Nitrogen dioxide 10 ppm 0 ppm
Nitrogen oxide 100 ppm 25 ppm
Sulphur dioxide 10 ppm 0 ppm

t50< 10 sec

t90< 30 sec

72

Operating temperature: -10 °C – +40 °C

Humidity range: 10 – 95 % r.h., non-condensing

11 Technical aspects

Hydrogen H2 sensor data

Measurement principle: electrochemical

Range: 0 – 1.0 % vol.

Response times (pump instruments):

t50< 40 sec

t90< 70 sec

The use of probes increases response times!

Warm-up period: about 1 minute

Lifetime:

- garanteed 12 months

- expected 24 months

Cross-sensitivity at 20 °C:

Gas Concentration Display

Ammonia 100 ppm 0 ppm

Carbon dioxide 1,000 ppm 0 ppm
Carbon monoxide 50 ppm 6 ppm
Chlorine 5 ppm 40 ppm

Ethylene 500 ppm yes (not dened)

Hydrocyanic acid 10 ppm 0 ppm
Hydrogen sulphide 10 ppm 0 ppm
Isopropanol 1,100 ppm 0 ppm

Methane 1 % vol. 0 ppm
Nitrogen dioxide 10 ppm 0 ppm

Operating temperature: -10 °C – +40 °C

Humidity range: 10 – 95 % r.h., non-condensing

CAUTION!

The HG4 leather case is required for explosion pro­tection when using the H2 sensor.

73

11 Technical aspects

Hydrogen sulphide H2S sensor data (0 – 100 ppm)

Measurement principle: electrochemical

Range: 0 – 100 ppm

Response times (pump instruments):

The use of probes increases response times!

Warm-up period: about 1 minute

Lifetime:

- garanteed 24 months

- expected 36 months

Cross-sensitivity at 20 °C:

Gas Concentration Display

Ammonia 100 ppm 0 ppm

Carbon dioxide 5,000 ppm 0 ppm
Carbon monoxide 100 ppm 6 ppm
Chlorine 20 ppm -1 ppm

Ethylene 500 ppm 2 ppm

Hydrogen 1 % vol. 200 ppm
Hydrocyanic acid 10 ppm 1 ppm

Methane 1 % vol. 0 ppm

Nitrogen dioxide 10 ppm 0 ppm
Sulphur dioxide 10 ppm yes (not dened)

t50< 15 sec

t90< 30 sec

74

Operating temperature: -20 °C – +40 °C

Humidity range: 15 – 90 % r.h., non-condensing

11 Technical aspects

Hydrogen sulphide H2S sensor data (0 – 2000 ppm)

Measurement principle: electrochemical

Range: 0 – 2,000 ppm

Response times (pump instruments):

t50< 30 sec

t90< 90 sec

The use of probes increases response times!

Warm-up period: about 1 minute

Lifetime:

- garanteed 24 months

- expected 36 months

Cross-sensitivity at 20 °C:

Gas Concentration Display

Ammonia 100 ppm 0 ppm

Carbon dioxide 5,000 ppm 0 ppm
Carbon monoxide 100 ppm 6 ppm
Chlorine 20 ppm -1 ppm

Ethylene 500 ppm 2 ppm

Hydrogen 1 % vol. 200 ppm
Hydrocyanic acid 10 ppm 1 ppm

Methane 1 % vol. 0 ppm

Nitrogen dioxide 10 ppm 0 ppm
Sulphur dioxide 10 ppm yes (not dened)

Operating temperature: -20 °C – +40 °C

Humidity range: 15 – 90 % r.h., non-condensing

75

11 Technical aspects

Ammonia NH3 sensor data

Measurement principle: electrochemical

Range: 0 – 100 ppm

Response times (pump instruments):

The use of probes increases response times!

Warm-up period: about 1 minute

Lifetime:

- garanteed 12 months

- expected 24 months

Cross-sensitivity at 20 °C:

Gas Concentration Display

Alcohol 1,000 ppm 0 ppm

Carbon monoxide 1,000 ppm 0 ppm
Carbon dioxide 5,000 ppm 0 ppm
Chlorine 1 ppm 0 ppm
Carbon hydride 1 % vol. 0 ppm
Hydrochloric acid 5 ppm 0 ppm
Hydrogen 1 % vol. 0 ppm
Hydrocyanic acid 10 ppm 0 ppm
Hydrouoric acid 4 ppm 0 ppm
Hydrogen sulphide 10 ppm 0 ppm
Nitrogen 100 % vol. 0 ppm
Phosphine 300 ppm 0 ppm

t50< 20 sec

t90< 60 sec

76

Operating temperature: -20 °C – +40 °C

Humidity range: 10 – 95 % r.h., non-condensing

11 Technical aspects

Oxygen O2 sensor data

Measurement principle: electrochemical

Range: 0 – 25 % vol.

Response times (pump instruments):

t90< 30 sec

The use of probes increases response times!

Warm-up period: about 1 minute

Lifetimer:

- garanteed 24 months

- expected 24 months

Operating temperature: -20 °C – +40 °C

Humidity range: 5 – 95 % r.h., non-condensing

77

11 Technical aspects

Hydrogen chloride HCI sensor data

Measurement principle: electrochemical

Range: 0 – 30 ppm

Response times (pump instruments):

The use of probes increases response times!

Warm-up period: about 1 minute

Lifetime:

- garanteed 12 months

- expected 24 months

Cross-sensitivity at 20 °C:

Gas Concentration Display

Alcohol 1,000 ppm 0 ppm

Carbon dioxide 5,000 ppm 0 ppm
Carbon monoxide 1,000 ppm 11 ppm
Chlorine 5 ppm 1 ppm
Hydrobromic acid 1 ppm 1 ppm
Carbon hydride 1 % vol. 0 ppm
Hydrogen 1 % vol. 0 ppm
Hydrogen sulphide 10 ppm 2.75 ppm
Hydrocyanic acid 15 ppm 1 ppm
Hydrouoric acid 3 ppm 0 ppm
Nitrogen 100 % vol. 0 ppm
Phosgene 0.1 ppm 0 ppm
Phosphine 0.1 ppm 0.3 ppm
Sulphur dioxide 5 ppm expected (not de-

t50< 30 sec

t90< 70 sec

ned)

78

Operating temperature: -20 °C – +40 °C

Humidity range: 10 – 95 % r.h., non-condensing

11.3 Error messages

An error message is displayed in case of any failure during ope­ration. The error No. and error description will be indicated.

11 Technical aspects

Error code LCD (error

description)

F09 no adjustment: no adjustment data

F10 adjustment

error:

F13 adjustment

error:

F51 – F54 system error component error witch instrument off

F 59 voltage supply voltage outside the

F100 pump power pump power too low check lters in the in-

Cause Remedy

present

zero point in the ppm

range

sensitivity in the ppm
range

permitted range

carry out an adjust­ment

check test gas or re­peat adjustment

check test gas or re­peat adjustment

and on again or con-

tact SEWERIN service

contact Sewerin serv­ice only

strument and probes.
Please observe the
instructions in section

9.9: Adjusting pump

operation

Note:

If any other error codes appear, please contact

SEWERIN service!

Cause:

Remedy:

F09 – F15 temporary errors

F40, F100 clearable errors

F51 – 54, F59 – F62 system errors; switch instrument off

Programm defect

SEWERIN service

79

11 Technical aspects

11.4 Consumables

Pumplter built into the instrument to protect the pump

H2Sltreinside
the senor head
(EX-TEC OD 4)

Test gas cans various concentrations for monitoring and

Note:

Test gas cans are under pressure: do not store
above 50 °C!

(to replace it, the sensor cap must be re­moved with the screwdriver supplied with

the instrument and the sensor removed)
Change in SEWERIN service

adjustment purposes

80

11.5 Hints on Disposal

The disposal of instruments and accessories is governed by the
European Waste Catalogue (EWC).

Type of Waste Corresponding EWC Code

Instrument 16 02 13
Test gas can 16 05 05
Battery, accu 16 06 05

Old Instruments

Old instruments can be returned to Hermann Sewerin GmbH.

We will arrange the qualied disposal free of charge through
certied specialists.

11 Technical aspects

81

12 Delivery variants and accessories

12 Delivery variants and accessories

12.1 Delivery variants

EX-TEC OD 4
(diffusion device)

THT:

Part no.: OD04-10001
Serial number:

062 02 ....

(Type - Model - Number)

TBM:

Part no.: OD04-11001
Serial number:

062 04 ....

(Type - Model - Number)

EX-TEC OD 4
(pump-device)

THT:

Part no.:OD04-10101
Serial number:

062 03 ....

(Type - Model - Number)

82

TBM:

Part no.: OD04-11101
Serial number:

062 05 ....

(Type - Model - Number)

z All devices are equipped with an integral memory to store

measuring data

z Suitable for connecting accessories

12 Delivery variants and accessories

EX-TEC GM 4
(diffusion device)

Part no.: GM04-10001
Serial number:

062 00 ....

(Type - Model - Number)

EX-TEC GM 4
(pump device)

Part no.: GM04-10101
Serial number:

062 01 ....

(Type - Model - Number)

z All devices are equipped with an integral memory to store

measuring data

z Suitable for connecting accessories
z For available sensors please note chapter 11.2

83

12 Delivery variants and accessories

12.2 Accessories

Docking station HG4

Part-No.: LP10-10001

Docking station HG4 with in­terface

Part-No.: LP10-10101

z to hold the instrument

z with a connection socket for

the AC/DC adapter or a vehi­cle cable

z with apertures for mounting in

the vehicle or elsewhere

AC/DC adapter M4

Part-No.: LD10-10001

z to connect the docking stati-

on HG4 to a 100 – 240-volt~

mains supply

84

Vehicle cable M4 12 V= moun­ting

Part-No.: ZL07-10000

z to connect the docking stati-

on HG4 to a 12-volt= vehicle

supply

z with built-in fuse and blade

receptacles

Vehicle cable M4 12 V= mobile

Part-No.: ZL07-10100

z to connect the docking stati-

on HG4 to a 12-volt= vehicle

supply

z with built-in fuse and connec-

tor for cigarette lighter

12 Delivery variants and accessories

Vehicle cable M4 24 V= moun­ting

Part-No.: ZL09-10000

z to connect the docking stati-

on HG4 to a 24-volt= vehicle

supply

z with voltage transformer and

blade receptacles for a fix
connection

Carrying bag HG4

Part-No.: 3204-0034

z leather case with viewing win-

dow and eyelets for the strap

z tab with press-stud to secure

the instrument

z clip to wear device at the belt

z can be used in areas exposed

to the danger of explosion

(conducting front foil)

z must be used in areas where

there is hydrogen and with the
H2-sensor

Carrying strap

Part-No.: 3209-0003

z Leather strap to carry the

instrument

z adjustable between 0.5 – 1.0 m

Storage box for electrochemi­cal sensors

Part-No.: GM04-Z0100

z designed for the safe storage

of electrochemical sensors

85

12 Delivery variants and accessories

EX-TEC GM 4 probe equipment

Diffusion device

Pump device

Flexible hand probe HG4 with
ball

Part-No.: ZS42-10000

z for two-handed operation in re-

latively inaccessible locations:

probe tip with suction globe,

ne dust lter, probe hose and

probe head with attachment
screws

Flex Probe HG4

Part-No.: ZS40-10200

z for one-handed detection and

measurement in relatively in-

accessible locations: exible
swan-neck, lter insert in the

head and adapter head with
attachment screws

Flexible hand probe HG4

Part-No.: ZS40-10100

z for two-handed detection and

measurement in relatively in-

accessible locations: hand grip
with a exible probe tip, lter

insert in the head, probe hose
and probe head with attach­ment screws

86

Note:

The probes for the pump instrument cannot be used

in diffusion operation.
Probes for other gases are available on request.

Adapter EX-TEC OD 4

12 Delivery variants and accessories

Test and probe head OD4

Part-No.: PP01-B1300

z the EX-TEC OD 4 is operated

in conjunction with the test and
probe head, which has a plug
connection for the sampling
hoses

Adapter hoses

z Please note that different ho-

ses must be used for different
pressure ranges

A detailed listing can be found
on page 12

Mini measuring adapter

Part-No.: ZZ20-10000

z for connecting adapter hose

and gas pipe

87

12 Delivery variants and accessories

Prüftechnik

EX-TEC OD 4

EX-TEC GM 4

Test set SPE OD

Part-No.: PP01-50100

z for mobile and in-vehicle use
z with a connection for SEWERIN

test gas cans, ow-rate control,

release key and connecting
hose, in conjunction with the

Test set and probe head OD4

Test set SPE HG

Part-No.: PP01-10201

z for mobile and in-vehicle use
z with a connection for SEWERIN

test gas cans, ow-rate control,

release key and connecting
hose, in conjunction with the
probe head HG4

88

Test set SPE-Y

Part-No.: PP01-20001

z for mobile and in-vehicle use

z with a connection for

SEWERIN test gas cans,
ow-rate control, release key

and connecting hose, for the
probe head HG4

12 Delivery variants and accessories

Test gas cans

z for testing display accuracy

and adjustment

z various test gas concentra-

tions in 1-litre cans under
pressure of approx. 12 bar

Pressure cylinders

z for testing and adjusting dis-

play sensitivity

z various test gas concentra-

tions in 0.4/2.0/10.0-litre steel

cylinders under pressure of

100 – 150 bar

Case HG4

Part-No.: ZD18-10000

z to hold:

- instrument and charging
equipment

- probe equipment

- Test gas can and test set

SPE-Y

z delivery does not include con-

tents shown in the picture

89

Appendix

13 Appendix

13.1 EU-declaration of conformity

Hermann Sewerin GmbH hereby declares that the EX-TEC
OD 4 / GM 4 fulls the requirements of the following guidelines:

z 2014/30/EU

z 2014/34/EU

Gütersloh, 2016-04-20

Dr. S. Sewerin

(General Manager)

The complete declaration of conformity can be found online.

®

90

13.2 Inspection protocol

Inspection protocol EX-TEC® GM 4 / OD 4

Sensor (e.g. CO):
test gas conc. (e.g. 40 ppm CO):
display tolerance zero point (e.g. -3 – +3 ppm) (Display tolerances according to
display tolerance test gas (e.g. 27 – 33 ppm) chapter 5.4 of operating instruction)
Serial no. (e.g. 062 01 0001):

1.0 Device status

1.1 - status correct (e.g.: Y / N)

1.2 - remaining operating hours (e.g.: 5 h)

2.0 Pump test

2.1 - fault F 100 when sealing

2.2 - pump filter changed (e.g.: Y / N)

3.0

Display accuracy

3.1 - display (zero point)

- within tolerance (e.g.: Y / N)

3.2 - display (test gas)

- within tolerance (e.g.: Y / N)

Appendix

22.07.2008

4.0 AL 1 alarm triggering

4.1 optical alarm (e.g.: Y / N)

4.2 audible alarm (e.g.: Y / N)

5.0 Observations

- housing broken

- adjustment, repair

- factory inspection

- or the like

6.0 Test

- day

- month

- year

- signature

91