How it Works
Sewerin
Loading...
HS 680
User Manual
105 pgs1.21 Mb0
Table of contents
Loading...

Sewerin HS 680, HS 650, HS 610, HS 660 User Manual

Download
Page 1
EX-TEC® HS 680/660/650/610
03.06.2019 a – 105734 – en
Operating Instructions
Page 2
CH4
AL4 VOL% CH4
0,1
1,0
0
10 100 10
0.90
EX-TEC® HS 680/660/650/610
Connector
Supporting bracket
Buzzer
USB port
Connection for power supply
Fig. 1: EX-TEC HS 680 device overview
Bar display
Signal light
Gas input
Display
Function keys
Jog dial
Connector
Selected application
Capacity disposable battery/ rechargeable battery
Fig. 2: EX-TEC HS 680 display
Measurement value
Alarm
Unit
Gas type
Current assignment of function keys F1 – F3
Page 3
Esc
0

Display symbols

General
Menu Fault
OK Carry out device inspection
Cancel
Buzzer o󰀨
Take sample Purge
Save Stop measurement
Delete Information
Capacity disposable bat­tery/rechargeable battery
Applications
Inspection above ground Structure
Tab (jump to next input
eld)
Set zero point
Open stored comment Open stored inspector
Plants Gas measuring
Measuring in bar holes Warning %LEL
Ethane analysis Warning ExTox
Page 4

Information about this document

The warnings and notes in this document mean the following:
DANGER!
A
A
A
Risk of personal injury. Will result in serious injury or death.
WARNING!
Risk of personal injury. Can result in serious injury or death.
CAUTION!
Risk of personal injury. Can result in injury or a risk to health.
Notice!
Risk of damage to property.
Note:
Tips and important information.
Numbered lists (numbers, letters) are used for:
● Instructions that must be followed in a certain order
Lists with bullet points (point, dash) are used for:
● Lists
● Instructions that only involve one step
Numbers between forward slashes /.../ refer to the referenced doc­uments.
Page 5
Contents Page
1 General .....................................................................................1
1.1 Warranty ....................................................................................1
1.2 Purpose .....................................................................................2
1.3 Intended use .............................................................................3
1.4 General safety information ........................................................4
1.5 Allocation of tasks to applications .............................................5
2 Features ...................................................................................6
2.1 Visual and audible signals .........................................................7
2.2 Sensors .....................................................................................8
2.3 Explosion protection .................................................................. 9
2.3.1 Passive explosion protection ..................................................9
2.3.2 Active explosion protection ..................................................10
3 Operation ............................................................................... 11
3.1 General information on operation ............................................ 11
3.1.1 Keys and jog dial .................................................................. 11
3.1.2 Selecting/exiting menus and menu items .............................12
3.1.3 Switching the device on .......................................................12
3.1.4 Selecting/changing the application .......................................14
3.1.5 Di󰀨erences between measuring mode and settings mode ..15
3.2 Measuring mode .....................................................................15
3.2.1 Accessing the menu (measuring mode menu structure) ......16
3.2.2 Zero point ............................................................................. 17
3.2.3 Inspection above ground ...................................................... 18
3.2.4 Plants ...................................................................................19
3.2.5 Measuring in bar holes ......................................................... 20
3.2.6 Ethane analysis ................................................................... 21
3.2.6.1 General information on ethane analysis............................22
3.2.6.2 Purging the detector .......................................................... 24
3.2.6.3 Carrying out an ethane analysis........................................25
3.2.6.4 Evaluating an ethane analysis ..........................................26
3.2.7 Structure ...............................................................................29
3.2.8 Gas measuring ..................................................................... 30
3.2.9 Warning %LEL ....................................................................31
3.2.10 Warning ExTox .....................................................................32
3.2.11 Settings ................................................................................33
3.2.12 Start/stop/save a measurement ...........................................33
3.2.13 Protocols ..............................................................................35
I
Page 6
Contents Page
3.2.14 Device inspection ................................................................. 36
3.2.15 Gas type CxHy ..................................................................... 36
3.2.16 Device information ...............................................................37
3.3 Settings ...................................................................................37
3.3.1 Opening settings ..................................................................37
3.3.2 Settings menu structure .......................................................39
3.3.3 Adjustment ...........................................................................40
3.3.4 System .................................................................................42
3.3.5 Alarms ..................................................................................44
3.3.6 Date/time .............................................................................. 44
3.3.7 Memory ................................................................................44
4 Power supply .........................................................................46
4.1 Suitable disposable/rechargeable battery types .....................46
4.2 Operation with rechargeable batteries ....................................47
4.2.1 Charging ............................................................................... 48
4.2.2 Rechargeable battery maintenance .....................................49
4.3 Battery alarm ........................................................................... 49
4.4 Replacing disposable/rechargeable batteries .........................50
5 Maintenance ..........................................................................51
5.1 Device inspection ....................................................................51
5.1.1 General information on the device inspection ...................... 51
5.1.1.1 Scope ................................................................................ 51
5.1.1.2 Frequency .........................................................................52
5.1.1.3 Documentation .................................................................. 53
5.1.1.4 Integrated device inspection .............................................53
5.1.1.5 Order .................................................................................54
5.1.1.6 Test gases for the device inspection ................................. 54
5.1.2 Performing the device inspection ......................................... 56
5.1.2.1 Accessing the device inspection ....................................... 56
5.1.2.2 Concluding the device inspection......................................57
5.1.3 Testing the general status ....................................................58
5.1.3.1 Housing ............................................................................. 58
5.1.3.2 Signals ..............................................................................59
5.1.3.3 Probe.................................................................................59
5.1.3.4 Filter ..................................................................................59
5.1.3.5 Pump .................................................................................59
5.1.4 Testing indication accuracy with supply of fresh air .............60
5.1.5 Testing indication accuracy with supply of test gas .............. 60
II
Page 7
Contents Page
5.2 Adjustment ..............................................................................62
5.2.1 Scope ...................................................................................62
5.2.2 Test gases for the adjustment ..............................................63
5.2.3 Special features of adjustment with gas mixture .................. 64
5.2.4 Preparation ........................................................................... 65
5.2.5 Performing the adjustment ................................................... 65
5.2.5.1 Adjusting the zero point.....................................................66
5.2.5.2 Adjusting the sensitivity ..................................................... 66
5.2.6 Carrying out an oxygen adjustment .....................................68
5.2.6.1 Adjusting the zero point for oxygen ................................... 68
5.2.6.2 Adjusting the sensitivity for oxygen ................................... 69
5.3 Servicing .................................................................................69
6 Faults ......................................................................................70
7 Appendix ................................................................................71
7.1 Specications and permitted operating conditions .................. 71
7.2 Alarms .....................................................................................72
7.2.1 Features ...............................................................................72
7.2.2 Occupational exposure limits (OEL) and excess factors
(STEL and LTEL) .................................................................. 75
7.2.3 Alarm thresholds (factory settings) .......................................75
7.2.4 Setting ranges for gas types ................................................76
7.3 Limit values for the device inspection .....................................77
7.4 Memory capacity .....................................................................78
7.5 Sensors ...................................................................................79
7.5.1 Infrared sensors (IR) ............................................................79
7.5.1.1 Methane CH4, propane C3H8, butane C4H10 for
Warning %LEL and Warning ExTox ..................................79
7.5.1.2 Methane CH4, propane C3H8 for gas measuring ...............80
7.5.1.3 Carbon dioxide CO2 for warning ExTox ............................. 80
7.5.1.4 Carbon dioxide CO2 for measuring in bar holes ................ 81
7.5.2 Electrochemical sensors (EC) .............................................. 81
7.5.2.1 Oxygen O2 ........................................................................ 81
7.5.2.2 Carbon monoxide CO .......................................................82
7.5.2.3 Hydrogen sulphide H2S ..................................................... 83
7.5.3 Gas-sensitive semiconductor ............................................... 83
7.6 Technical information ..............................................................84
7.6.1 Identication sticker (back of device) ...................................84
7.6.2 Cleaning ............................................................................... 84
III
Page 8
Contents Page
7.6.3 Electrostatic charge ..............................................................84
7.7 Accessories and consumables ................................................ 85
7.8 Declaration of conformity ........................................................86
7.9 Inspection protocols ................................................................87
7.9.1 Test with individual gases .....................................................87
7.9.2 Test with gas mixture ............................................................89
7.10 Advice on disposal ..................................................................91
7.11 Terminology and abbreviations ...............................................92
7.12 Referenced documents ...........................................................93
8 Index .......................................................................................94
IV
Page 9
1 General

1.1 Warranty

The following instructions must be complied with in order for any warranty to be applicable regarding functionality and safe opera­tion of this equipment. This product must only be commissioned
by qualied professionals who are familiar with the legal require­ments (Germany: DVGW).
● Read these operating instructions prior to operating the product.
● Use the product only as intended.
● Repairs and maintenance must only be carried out by special-
ist technicians or other suitably trained personnel. Only spare parts approved by Hermann Sewerin GmbH may be used when performing repairs.
● Use only suitable battery types, otherwise the device will not
be explosion-proof.
● Changes or modications to this product may only be carried
out with the approval of Hermann Sewerin GmbH.
● Use only Hermann Sewerin GmbH accessories for the product.
Hermann Sewerin GmbH shall not be liable for damages resulting from the non-observance of this information. The warranty con-
ditions of the General Terms and Conditions (AGB) of Hermann Sewerin GmbH are not a󰀨ected by this information.
In addition to the warnings and other information in these Oper­ating Instructions, always observe the generally applicable safety and accident prevention regulations.
The manufacturer reserves the right to make technical changes.

1 General

1
Page 10
1 General

1.2 Purpose

The EX-TEC HS 680 and the models 660, 650 and 610 are hand- held measuring devices which can be used for all gas pipeline testing applications.
The devices are designed for professional industrial use and require the necessary specialist knowledge for working in gas pipelines. Sample applications are described in /3/.
All devices are tted with infrared sensors for measuring hydro­carbons CXHY and carbon dioxide CO2 as standard. Models 680 and 660 also feature a gas-sensitive semiconductor.
Models 680 and 660 can be optionally tted with a detector for ethane analysis to help you safely distinguish between natural gas and swamp gas.
All devices can also be individually tted with electrochemical
sensors.
The infrared sensors operate on the principle of absorption via infrared-active gases, and the electrochemical sensors operate on the electrochemical cell principle. The gas-sensitive semi­conductor reacts to changes in conductivity brought about by reducible gases.
Note: These operating instructions describe the EX-TEC HS 680 with
all additional equipment (rmware version 2.XXX). All descrip­tions refer to the device as delivered (factory settings) and apply
to all device versions. The manufacturer reserves the right to make changes.
2
Page 11

1.3 Intended use

This device is intended for professional residential and commer-
cial use including small rms and commercial operations. The
appropriate specialist knowledge is required to operate the device.
The device may only be used to measure the following gases
(depending on the device model and additional equipment):
● Methane CH4/propane C3H8/butane C4H
● Carbon dioxide CO
● Oxygen O
● Hydrogen sulphide H2S
● Carbon monoxide CO
The device must not be used for:
● Gas analysis of technical processes
● Monitoring liquids
The device can be used up to a temperature of 40 ºC. However, high temperatures reduce the lifetime of the sensors and re­chargeable batteries.
If a device with an electrochemical sensor is exposed to gas concentrations above the measuring range limit, this can reduce
the lifetime of the sensor.
1 General
10
2
2
3
Page 12
1 General

1.4 General safety information

● The device has been tested to ensure that it is explosion-proof in accordance with European standards (CENELEC).
● The device must only be switched on with fresh air.
● Do not use this device in oxygen-enriched atmospheres, oth- erwise it will not be explosion-proof.
● Only probe hoses with a hydrophobic lter may be used.
Exception:
If the probe has a built-in hydrophobic lter, the hose does not require any other lters.
● The device must only be tested and adjusted with test gases in well ventilated rooms or in the open air. Test gases must be handled in a professional manner.
● Always carry out a device inspection (see section 5.1) after
the device has su󰀨ered an impact (for example, if dropped accidentally).
● The device complies with the limits of the EMC directive. Always observe the information in the manuals of (mobile) radio equip­ment when using the device close to (mobile) radio equipment.
Note:
Follow the advice regarding explosion protection (see section 2.3).
4
Page 13

1.5 Allocation of tasks to applications

The table is designed to help you decide which application to choose for which activity (in accordance with /3/).
1 General
Gas measuring
Inspection
above ground
– Ground
– Gas line
e.g. when commissioning/decommissioning gas systems)
– Purging (to demonstrate purity or absence of gas,
– Possible leakage points
Warning %LEL
Warning ExTox
Measuring in
bar holes
– Determining gas dispersion (detection limit)
area monitoring
● Distinguishing between natural gas and swamp gas Ethane analysis
● Warning against explosive gas concentrations through work
monitoring
● Warning against explosive and toxic gases through work area
– Classify leaks
Plants
– Locating a probable gas escape (repair point)
– Preventing possible dangers
● Measuring very low gas concentrations
Structure
● Locating the source of gas
● Finding leaks
● Locating the source of gas
● Finding leaks at internal connections
Location Activity Application
Gas lines, gas systems, … ● Measuring the gas concentration
Buried gas lines ● Measuring very low gas concentrations:
Gas lines, gas systems, …
in houses, enclosed spaces
and shafts
In the ground ● Measuring the gas concentration to:
Poorly accessible gas pipes,
systems
In the house ● Measuring very low gas concentrations
5
Page 14

2 Features

2 Features
The device comes in four models:
EX-TEC HS 680
EX-TEC HS 660
EX-TEC HS 650
EX-TEC HS 610
The models are suitable for the following applications:
Application HS 680 HS 660 HS 650 HS 610
Inspection above ground × ×
Measuring in bar holes O
2
×
○
×
○
×
○
Plants × ×
Structure CO
×
○
×
○
Gas measuring × × × ×
Warning %LEL × ×
Warning ExTox CO H2S O
2
×
○ ○ ○
×
○ ○ ○
Ethane analysis ○ ○
× standard ○ optional
×
○
6
Page 15

2.1 Visual and audible signals

The device features two alarms:
● Signal light on top of device (visual signal)
● Buzzer on side of device (audible signal)
The signals indicate alarms and faults. The device also emits
signals when it is switched on and o󰀨.
If this symbol appears on the display, the audible signal
can be switched o󰀨. When an audible signal has been switched o󰀨 it cannot
be switched back on while the concentration level re­mains above the alarm threshold.
This symbol appears at the top left of the display as soon
as the audible signal has been switched o󰀨. It disappears
automatically if the level falls below the alarm threshold.
Operating signal
When using the Warning %LEL and Warning ExTox applications, the device emits a visual and audible signal at regular intervals. This indicates that the device is working properly.
2 Features
Alarm
The device can monitor several gases at the same time. If the measured gas concentration of one or more gases exceeds spec-
ied limit values (alarm thresholds) the device gives a warning. It emits both audible and visual signals, which are clearly di󰀨erent
from the operating signal.
WARNING! Risk to life from dangerous gas concen-
A
There is detailed information on alarms in section 7.2.
trations
An alarm always indicates danger.
● Take all necessary measures for your own safety and
the safety of others immediately.
7
Page 16
2 Features

2.2 Sensors

The device features three types of sensor:
● Gas-sensitive semiconductor (SC)
● Infrared sensor (IR)
● Electrochemical sensor (EC)
Application Gas Measuring range Sensors
Inspection above ground
Plants CH41 ppm – 100 % vol. SC, IR
Measuring in bar holes
Ethane analysis CH4--- Gas chroma-
Structure CH41 ppm – 100 % vol. SC, IR
CH41 ppm – 10 % vol. SC, IR
CH40.0 – 100 % vol. IR
CO20 – 30 % vol. IR
O
0 – 25 % vol. EC
2
C2H
C3H
6
8
tograph, SC
CO 0 – 500 ppm EC
Gas measuring CH40.0 – 100 % vol. IR
Warning %LEL and warning ExTox
CH40 – 100% LEL IR
CO 0 – 500 ppm EC
CO20 – 5 % vol. IR
O
0 – 25 % vol. EC
2
H2S 0 – 100 ppm EC
8
Page 17

2.3 Explosion protection

2.3.1 Passive explosion protection

The device is assigned to the following explosion-proof groups:
2 Features
Explosion-proof group
II2G Ex d e ib IIB T4 Gb – Methane CH
For the following atmospheres
– Propane C3H – Butane C4H
4
8
10
– Hydrogen sulphide H2S
When using
Device without carrying bag TG8
– Carbon monoxide CO
II2G Ex d e ib IIC T4 Gb – Methane CH
– Propane C3H – Butane C4H – Hydrogen sulphide H2S
4
8
10
Device
with
carrying
bag TG8 – Carbon monoxide CO – Hydrogen H
2
EC type-examination certicate: TÜV 07 ATEX 553353 X
DANGER! Risk of explosion from sparks
A
● Only ever open the battery compartment outside of
explosive areas.
● Only ever charge the device outside of explosive areas.
● Only use the USB port outside of explosive areas.
● Use only suitable battery types.
● When working with hydrogen, always use the TG8 car-
rying bag for the device.
9
Page 18
2 Features

2.3.2 Active explosion protection

The functional safety test applies to:
Applications: Warning %LEL
Gas types: Measuring range:
– Methane CH
– Propane C3H
4
8
Gases: Measuring range: As per:
– Oxygen O
– Carbon dioxide CO
2
2
– Carbon monoxide CO 0 – 500 ppm CO /5/
– Hydrogen sulphide H2S 0 – 100 ppm /5/
Tested accessories: – Test set SPE VOL
Warning ExTox
0 – 100% LEL
0 – 100% LEL
0 – 25 % O
0 – 5 % CO
2
2
– Flexible hand probe, 1 m
– Floating probe 2 m / 6 m
/7/
/5/
10
Type examination
Testing institute: DEKRA EXAM GmbH
Certicates: PFG 08 G 002 X
BVS 09 ATEX G 001 X
The following points were not part of the type examination:
● Saving measurement data (see section 3.2.12)
● Saving protocols from the integrated device inspection (see section 5.1.1.4)
● Disposable alkaline batteries for the power supply (see sec- tion 4.1)
Page 19
3 Operation

3.1 General information on operation

3.1.1 Keys and jog dial

The ON/OFF key is the only control on the device that does not change its function.
When switched on, the device is operated using the jog dial and function keys to navigate the display.
Control Action Function ON/OFF key Press ● Switches the device on
● Switches the device o󰀨
Function keys F1, F2, F3
Jog dial Turn ● Selects functions, settings,
Press ● Variable
● As indicated on the display at
the bottom of the screen
● Function keys may also have
no function assigned in some cases
measurement data, etc.
● Modies values
Press ● Opens the next program lev-
el (for example, menu item, function, measurement data,
selectable values)
● Accepts values

3 Operation

11
Page 20
3 Operation

3.1.2 Selecting/exiting menus and menu items

Functions, applications and settings etc. are selected via the main menu (for short: Menu). This menu has submenus and menu items. Refer to section 3.2.1 for information on accessing the menu.
Selecting submenus/menu items
Submenus and menu items are selected and opened using the jog dial and/or the function keys.
In measuring mode the name of the selected application is in-
dicated by the symbol at the top left of the display. You can nd
detailed information on selecting and switching applications in section 3.1.4.
Exiting menus/menu items
There are generally two ways to exit open menus/menu items and return to the next level up:
● Press Esc
● Select Back from the menu

3.1.3 Switching the device on

Note:
Always switch the device on with fresh air.
1. Press the ON/OFF key. The device switches on.
The switching on process involves an internal check.
Process Test purpose
Buzzer emits audible signal.
Signal light gives visual signal.
Display is inverted. Are there pixels missing from the
12
Is the audible signal working?
Is the visual signal working?
display?
Page 21
3 Operation
The start screen appears on the display.
Display:
– Device type: EX-TEC HS 680
®
EX-TEC HS 680
– User:
Frank Smith
Frank Smith City Council Leakage Delivery
V2.000
Fig. 3: Start screen
17.09.2018
13:02
City Council
Leakage Delivery – Firmware version: V2.000 – Date and time – Capacity disposable battery/
rechargeable battery
The splash screen for the application set under Autostart appears (see section 3.3.4).
Display:
CH4
– Gas type: CH
4
– Application as symbol (top left)
Inspection above ground 0 PPM ...10 VOL% AL 4 3 PPM
and text: Inspection above
ground – Measuring range:
0 ppm ... 10 % vol.
Fig. 4: Splash screen for
Inspection above ground application
– Alarm threshold: AL4, 3 ppm – Symbol for next application that
can be selected via function
key F3: Measuring in bar holes
The device switches to measuring mode. The device warms
up. The reading ashes.
While the device is warming up, the prompt Add fresh air! is displayed as a reminder.
2. Make sure the device is actually drawing in fresh air. Change its location if necessary.
3. Wait until the reading stops ashing.
The device is ready for use.
13
Page 22
3 Operation
0
10 100 10
Fig. 5: Inspection above ground measuring mode
WARNING! Risk to life from using miscalibrated or
A

3.1.4 Selecting/changing the application

A
faulty devices
Gas warning devices must be regularly checked before use.
WARNING! Risk to life from using miscalibrated or faulty devices If the device is used as a gas warning instrument (Warn­ing %LEL and Warning ExTox applications), it must be
regularly checked before use.
0,1
1,0
PPM CH4
0
● Carry out a device inspection each day before starting
work.
● Carry out a device inspection each day before starting
work.
Display:
– Current reading: zero when
device is switched on with fresh air
14
Note:
You may only switch applications when the device is drawing in fresh air.
The current application is indicated by the symbol at the top left of the display. The symbol at the bottom right shows the next ap­plication that can be selected via function key F3. You can specify
Page 23
3 Operation
which application is activated rst when the device is switched on
in the Settings under System (see section 3.3.4).
● Press Menu. Select the menu item for the application you
want to use.
OR a) Press function key F3. The device switches to the next ap-
plication.
b) Repeat until the symbol for the application you want to use
appears at the top left.
3.1.5 Di󰀨erences between measuring mode and settings mode
The device is operated in two modes:
● Measuring mode (see section 3.2)
Measurements are taken in measuring mode. All functions needed to take readings can be accessed from one menu.
● Settings (see section 3.3)
The device settings can be changed in settings mode. Infor­mation about the device can also be retrieved. Measurements cannot be taken in settings mode.
Settings are accessed via the menu in measuring mode. The settings are access-protected by a PIN code.
WARNING!
A

3.2 Measuring mode

When switched on the device is in measuring mode. In meas-
uring mode, the current readings are always displayed (g. 5).
Risk to life due to absence of alarm
The device only issues alarms in measuring mode. As soon you open the menu, alarms are no longer triggered.
● Only adjust settings in areas where there is no risk of
explosion and where there is no toxic or low-oxygen atmosphere.
15
Page 24
3 Operation
Zero point
Exit

3.2.1 Accessing the menu (measuring mode menu structure)

Depending on the application, the measurement will have to be saved or started and then stopped (see section 3.2.12).
WARNING!
A
Risk to life from operating signal failure When the device is used as a gas warning device (Warn­ing %LEL and Warning ExTox applications), an operat-
ing signal must always sound in measuring mode. If the operating signal does not sound, the device is not safe to operate.
● Stop using the device immediately.
● Leave explosive areas or areas with a toxic or low-ox-
ygen atmosphere immediately.
In measuring mode F1 can be used to access the Menu.
Inspection above ground Plants Measuring in bar holes Ethane analysis Structure Gas measuring Warning %LEL Warning ExTox Settings Start measurement Protocol Purge Device inspection Gas type CxHy Device information
Fig. 6: Menu with submenus (menu items)
16
Page 25
Once you have started a measurement Start measurement in the menu becomes Stop measurement. In some applications this menu item is called Save measurement.
You can nd detailed information on starting, stopping and saving
measurements in section 3.2.12.
Protocol does not appear in the menu until you save a protocol
for the rst time.
Purging only appears in the menu in the ethane analysis appli­cation.
Gas type CxHy only appears in the menu if the device is equipped for at least one further gas type apart from methane CH4.

3.2.2 Zero point

The zero point can be manually set under Zero point in the menu. This is only necessary if the displayed fresh air measurement is not zero after the end of the warm-up period.
Gas Content in fresh air Correct zero point on device
CH4 0 % vol. 0.0 % vol.
CO 0 ppm 0 ppm
CO20.04 % vol. 0.04 % vol.
O2 20.9 % vol. 20.9 % vol.
3 Operation
The manual zero point setting is not saved. The zero point can be corrected by adjustment as often as zero point deviations occur (see section 5.2).
Requirements for correct setting of the zero point
● Device has been switched on with fresh air.
● Device continues to draw in fresh air.
Setting zero point (manual zero point setting)
1. Press Menu.
2. Select Zero point menu item. The values are automatically adjusted. The device returns to measuring mode.
17
Page 26
3 Operation
The Setting zero point function can also be accessed using the relevant symbol in the Inspection above ground, Plants and
Structure applications.

3.2.3 Inspection above ground

The measuring mode can be changed for the Inspection above ground application via this menu item.
Area of use
– Measuring minimal gas concentrations above the ground, the
gas pipe or possible leakage points
Symbol
Unit
– ppm (parts per million) – % vol.
Measuring range
18
Gas-sensitive semiconductor 0 to 10,000 ppm
Infrared sensor 1 to 10 % vol.
Measurement data display
0
10 100 10
0,1
1,0
– Digit, for example,
0.90 % vol. CH
– Bar graph with quasi-loga-
AL4
0.90
Fig. 7: Inspection above ground measuring mode
VOL% CH4
rithmic scale
4
Page 27

3.2.4 Plants

The measuring mode can be changed for the Plants application via this menu item.
Area of use
– Measuring minimal gas concentrations in freely accessible
gas pipes and systems (e.g. gas pipes on bridges, above-
ground inverted siphons, biogas plants)
– Locating the source of gas – Finding leaks
Symbol
Unit
– ppm (parts per million) – % vol.
Measuring range
3 Operation
Gas-sensitive semiconductor 0 to 10,000 ppm
Infrared sensor 0.1 to 100 % vol.
Measurement data display
0,1
100
0
10
10
1,0
100
– Digit, for example,
8 ppm CH
4
– Bar graph with quasi-loga-
rithmic scale
PPM
8
CH4
Fig. 8: Plants measuring mode
19
Page 28
3 Operation

3.2.5 Measuring in bar holes

The measuring mode can be changed for the Measuring in bar
holes application via this menu item.
Area of use
– Measuring gas dispersal in the ground – Locating the possible leakage point and classifying the leak
Symbol
Unit
– % vol.
Measuring range
Infrared sensor
0.0 to 100 % vol.
(hydrocarbons CXHY)
Infrared sensor
0.0 to 30 % vol.
(carbon dioxide CO2)
Electrochemical sensor
0.0 to 25.0 % vol.
(oxygen O2)
Measurement data display
– Digit, for example,
1,0
0
20.9
10
0
VOL% CO2
VOL% O2
100
0 % vol. CO
20.9 % vol. O2
0.60 % vol. CH
0.60
Fig. 9: Measuring in bar holes measuring mode
VOL% CH4
– Bar display with quasi-logarith-
mic scale (for CH4)
2
4
20
Page 29

3.2.6 Ethane analysis

Selecting Ethane analysis from the menu opens an overview of the gases that can be detected. The device automatically returns to measuring mode.
Note:
The ethane analysis cannot be started with the Ethane analysis menu item. Information about carrying out the ethane analysis can be found in section 3.2.6.3.
Area of use
– Distinguishing between natural gas and swamp gas
Symbol
Unit
3 Operation
– ppm (parts per million) – % vol.
Measuring range
Infrared sensor (hydrocarbons CXHY)
Infrared sensor (carbon dioxide CO2)
Electrochemical sensor (oxygen O2)
Gas chromatograph / gas-sensitive semiconductor
0.0 to 100 % vol.
0 to 30 % vol.
0.0 to 25.0 % vol.
1 ppm to 1.2 % vol.
21
Page 30
3 Operation
Measurement data display
0,1
0
100
10
1,0
20.9
10
VOL% CO2
0
VOL% O2
100
0 % vol. CO2
20.9 % vol. O2
9.0 % vol. CxH
– Digit, for example,
9.0
Fig. 10: Ethane analysis measuring mode
VOL% CxHy
– Bar display with quasi-logarith-
mic scale (for CxHy)
3.2.6.1 General information on ethane analysis
Ethane analysis is used to demonstrate the presence of natural gas and to distinguish between natural gas and swamp gas. This analysis utilises the fact that natural gas contains ethane, but swamp gas does not. Thus, if ethane is detected, it can be concluded that natural gas is present.
Note:
Ask the network operator about the composition of natural gas.
Request an analysis certicate.
Ethane can denitely be detected in natural gas at a minimum
concentration of 1 % vol. If the concentration of ethane in natural gas is less than 0.5 % vol., the gas cannot be detected. If the concentration falls between these two values, the analysis can be carried out, but the result must be assessed subsequently.
During the ethane analysis, the gas sample is always analysed for the presence of the following three gases:
● Methane CH
● Ethane C2H
● Propane C3H
4
6
8
Y
22
Requirement
The ethane analysis only works if the gas sample exhibits a spe-
cic concentration.
Page 31
3 Operation
The device checks the concentration at the start of the analysis and prevents the analysis being carried out if the concentration is too low.
Gas sample concentration
> 1 % vol. Denitely
Analysis is …
Device response
Analysis can be carried out
possible
1 % vol. – 0.5 % vol. Technical-
ly possi­ble
< 0.5 % vol. Not pos-
sible
Analysis can be carried out, but Ethane analysis critical note appears
Analysis cannot be carried out because Take sample symbol is not displayed
Displayed measurement values
In measuring mode, the device displays the actual concentra-
tions (g. 9).
During the analysis, the device automatically dilutes the gas sample to 1 % vol. to ensure optimal utilisation of the semicon­ductor sensor. This means:
● The concentration ratios of all components of the gas sample
are retained.
● The maximum concentration of a gas component is 1 % vol.,
even if the actual concentration in the gas sample is higher.
In the mode of curve, the maximum peak may be cut o󰀨 as necessary (g. 12 right).
Number of measurements
Always carry out 2–3 measurements in the same location to obtain certain results. Observe the information on evaluation in section 3.2.6.4.
23
Page 32
3 Operation
3.2.6.2 Purging the detector
The detector for ethane analysis must be kept clean at all times to prevent distortion of measurement results. When the device
is in use, however, higher hydrocarbons (e.g. propane, butane)
can accumulate in the detector and contaminate it.
The detector is automatically purged after every ethane analysis. Additional purging of the detector is required in these situations:
● Cancelled ethane analysis
If an ethane analysis is cancelled, the message Purging re- quired and the Take sample symbol appear automatically.
● Detector contamination suspected
Note:
The purge always takes 4 minutes. A new ethane analysis can only be started when the purge cycle has been completed.
The device is in measuring mode.
1. Only when detector contamination is suspected:
a) Press Menu. b) Select the Purging menu item. The message Purging re-
quired and the Take sample symbol appear.
24
NOTICE! Risk of damaging the sensor
A
2. Make sure the device is drawing in fresh air.
3. Press Take sample.
After the purge cycle is complete, the device will revert to meas­uring mode.
The ethane detector will be damaged if the air supply is contaminated or moist
● Always add clean, dry fresh air.
The purge cycle starts automatically as soon as the gas con­centration drops below 50 ppm. The time remaining until the end of the purge cycle is displayed.
Page 33
3.2.6.3 Carrying out an ethane analysis
The device is in measuring mode.
1. Make sure the device is drawing in fresh air.
2. Change to the Ethane analysis application.
3. The ethane analysis is generally performed on a bar hole. Use the localisation probe and a probe hose.
a) Insert the probe into the bar hole. b) Connect the probe hose to the device. As soon as the measurement value satises specic conditions
(gas concentration >1 % vol., stable measurement value), the
Take sample symbol appears.
4. Press Take sample. A message appears.
Note:
An ethane analysis takes approximately 4 minutes. After Esc is used to cancel the analysis, the detector must be purged (see section 3.2.6.2). This purge cycle also takes 4 minutes.
3 Operation
5. Conrm the Take sample? prompt by pressing OK. The gas sample is taken.
The Add fresh air note appears.
6. Add fresh air.
a) To do so, remove the probe hose from the device. b) Move away from the bar hole. Note the direction of the wind.
As soon as the gas concentration drops below 50 ppm, the analysis of the gas sample taken starts automatically. The gas sample analysis is plotted on the display.
25
Page 34
3 Operation
150 200050 100
C3H8
Analysis
Yes
CH4
Yes
C2H6
Yes
C3H8
250 s
1,0
CH4
C2H6
0,1
100
10
088 Seconds
Fig. 11: Mode of curve of an analysis in progress
When the analysis is complete, the Save symbol appears.
7. Press Save.
8. If necessary enter a Comment on the analysis.
a) Select the characters required using the jog dial. Conrm
each character using the jog dial.
OR
− Press Open stored comments. A list of the stored com-
ments will appear.
− Select the desired comment. Open the comment with OK.
b) Then conrm your entry/selection with OK.
OR
Press Esc if you do not wish to enter a comment.
9. Conrm your entry with OK. The comment is saved together
with the protocol name (date, time).
3.2.6.4 Evaluating an ethane analysis
Fully completed ethane analyses are saved as protocols. These can be accessed and cleared at any time.
26
Page 35
3 Operation
CH4
1,0
0,1
100
10
17.09.2018 11:21 12/47
Analysis CH4 C2H6 ???? C3H8 ----
150 200050 100
Fig. 12: Ethane analysis
protocol
250 s
A protocol contains the following
Yes
information about the gas sample:
– Analysis of the gas components:
CH4 Yes C2H6 ???? C3H8 – – – –
– Curve; peaks of the gas compo-
nents denitely present in the
sample are labelled: CH
4
– Date and time the protocol was
saved
– Protocol number: 12/47, i.e.
12th protocol of 47 protocols in total
The symbols next to the analysed gas components are dened
as follows:
Symbol Gas component is … Yes Denitely present
???? Possibly present
– – – – Not present
Ideally, the result of the ethane analysis is a curve with at least
one clear, steep peak (g. 12 left). However, occasionally, the
analysis does not provide a clear determination of the gas com-
ponents present (g. 12 right). In such cases, you must decide whether the analysis quality is su󰀩cient.
CH4
1,0
C2H6
0,1
100
10
17.09.2018 11:35 13/47
C3H8
150 200050 100
Analysis
Yes
CH4 C2H6 Yes C3H8 Yes
250 s
Fig. 13: Quality assessment of an ethane analysis; Left: good quality,
Right: poor quality
CH4
1,0
0,1
100
10
17.09.2018 11:57 14/47
Analysis
Yes
CH4 C2H6 ???? C3H8 ----
150 200050 100
250 s
27
Page 36
3 Operation
Criteria for determining good analysis quality
Criteria for determining the presence of natural gas
Ethane analyses of insu󰀩cient quality
Note:
Never use poor-quality ethane analyses to demonstrate the pres­ence of natural gas.
Poor-quality ethane analyses can exhibit the following features, for example:
● Methane is denitely present.
● Methane concentration is 1 % vol.
● Peaks of the gas components present are clearly recognisable.
● Good analysis quality (see above)
● Ethane is denitely present.
● Curve does not contain any clear peaks (smooth concentra-
tion plot)
28
Reason: Residual gases from previous analyses have
accumulated.
Corrective action:
Purge with test gas, for example:
– 1 % vol. CH4 in synthetic air
OR
– 100 ppm C2H6 with 1 % vol. CH4 in synthetic air
● Curve and symbols (Analysis) provide contradictory informa-
tion about gas components
Reason: Extremely high or low temperatures (optimal
working temperature: 20°C)
Page 37

3.2.7 Structure

The measuring mode can be changed for the Structure applica­tion via this menu item.
Area of use
– Measuring minimal gas concentrations in structures. – Locating the source of gas
Symbol
Unit
– ppm (parts per million) – % vol.
Measuring range
Gas-sensitive semiconductor 0 to 10,000 ppm
Infrared sensor 0.1 to 100 % vol.
3 Operation
Electrochemical sensor
(carbon monoxide CO)
Measurement data display
0,1
100
0
10
Fig. 14: Structure measuring mode
1,0
0
4
10
PPM CO
PPM CH4
100
0 to 500 ppm
– Digit, for example,
0 ppm CO 4 ppm CH
4
– Bar display with quasi-loga-
rithmic scale (for CH4)
29
Page 38
3 Operation

3.2.8 Gas measuring

The measuring mode can be changed for the Gas measuring application via this menu item.
WARNING!
A
Area of use
Symbol
Risk to life due to absence of alarm The device does not sound an alarm in the gas measur­ing application.
● Before switching application, please make sure there
are no ignition sources close by.
● Do not smoke.
● Be extremely careful.
– Demonstrating gas purity / absence of gas in gas pipes
30
Unit
– % vol.
Measuring range
Infrared sensor 0 to 100 % vol.
Measurement data display
1,0
0
30
Fig. 15: Gas measuring mode
100
10
VOL% CH4
– Digit, for example,
30 % vol. CH
– Bar graph with quasi-logarith-
mic scale
4
Page 39

3.2.9 Warning %LEL

The measuring mode can be changed for the Warning %LEL application via this menu item.
WARNING!
A
Risk to life from operating signal failure
If the operating signal does not sound, the device is not safe to operate.
● Stop using the device immediately.
● Leave explosive areas or areas with a toxic or low-ox-
ygen atmosphere immediately.
Area of use
– Testing work environments where explosion is possible, e.g.
when working on gas pipes or gas systems
Symbol
3 Operation
Unit
– % LEL or % vol.
Measuring range (methane CH4)
Infrared sensor 0 to 100 % LEL or
0.00 to 4.40 % vol.
Measurement data display
010
50
30
40
70
80
20
60
90 100
– Digit, for example,
14 % LEL CH
4
– Bar display with linear scale,
alarm thresholds marked AL1
AL1 %LEL
14
Fig. 16: Warning %LEL measuring mode
CH4
and AL2
31
Page 40
3 Operation

3.2.10 Warning ExTox

The measuring mode can be changed for the Warning ExTox application via this menu item.
WARNING!
A
Risk to life from operating signal failure
If the operating signal does not sound, the device is not safe to operate.
● Stop using the device immediately.
● Leave explosive areas or areas with a toxic or low-ox-
ygen atmosphere immediately.
Area of use
– Warning of explosive and toxic gas concentrations as well as
lack of oxygen
Symbol
32
Unit
– % LEL (methane CH4) – % vol. (carbon dioxide CO2, oxygen O2) – ppm (carbon monoxide CO, hydrogen sulphide H2S)
Measuring range (methane CH4)
Infrared sensor 0 to 100 % LEL
Measurement data display
AL1 CH4
CO2
AL1 O2
AL1 CO
AL1 H2S
Fig. 17: Warning ExTox measuring mode
34
0.17
11.5
34
34
%LEL
VOL%
VOL%
PPM
PPM
– Digit, for example,
34 % LEL CH
0.17 % vol. CO
11.5 % vol. O
4
2
2
34 ppm CO 34 ppm H2S
Page 41
CAUTION!
A

3.2.11 Settings

You can change the device settings and access information about the device under Settings in the menu (see section 3.3).

3.2.12 Start/stop/save a measurement

Depending on the application, measurements will have to be saved or started and then stopped. The ethane analysis is an exception (see section 3.2.6.3).
Health risk due to late alarm
If you change the device from the Warning ExTox appli- cation to another application, data that could initiate an STEL or LTEL alarm is reset to zero.
● Only switch from Warning ExTox to another application
once you have left the work area being monitored.
3 Operation
Application
Inspection above ground ×
Plants ×
Measuring in bar holes ×
Structure ×
Gas measuring ×
Warning %LEL ×
Warning ExTox ×
Di󰀨erence between starting/stopping and saving
Selecting Start measurement followed by Stop measurement saves a measurement plot.
Selecting Save measurement saves an individual measurement, the current one.
start/stop save
Measurement
33
Page 42
3 Operation
Note:
Measurements cannot be cancelled. The only way to cancel a measurement is to stop it.
Up to 80 measurements can be saved.
The measurement values can be saved with or without a com­ment. Comment entries are saved automatically (ring memory
with max. 10 entries).
The stored measurements can be displayed on a computer using a readout program. The program is available at www.sewerin. com.
Starting a measurement
1. Press Menu.
2. Select Start measurement from the menu. This starts the
The measurement plot recording must always be concluded with Stop measurement.
Once the rst comment has been entered, the Open stored comments function will become available.
measurement plot recording.
34
Stopping a measurement
1. Press Stop measurement.
OR
a) Press Menu. b) Select Stop measurement from the menu.
2. Answer Yes to the warning prompt.
3. Enter a comment for the measurement.
a) Select the characters required using the jog dial. Conrm
each character using the jog dial.
OR
− Press Open stored comments. A list of the stored com-
ments will appear.
− Select the desired comment. Open the comment with OK.
Page 43
3 Operation
b) Then conrm your entry/selection with OK.
OR
Press Esc if you do not wish to enter a comment for the measurement.
The measurement is saved as a protocol. The protocol name is formed from the date, time and comment.
Saving a measurement
1. Press Menu.
2. Select Save measurement from the menu.
3. Enter a comment for the measurement.
a) Select the characters required using the jog dial. Conrm
each character using the jog dial.
OR
− Press Open stored comments. A list of the stored com-
ments will appear.
− Select the desired comment. Open the comment with OK.
b) Then conrm your entry/selection with OK.
OR
Press Esc if you do not wish to enter a comment for the measurement.
The measurement is saved as a protocol. The protocol name is formed from the date, time and comment.

3.2.13 Protocols

You can retrieve or clear protocols of saved data under Protocol
in the menu. When saved, the protocols are assigned to di󰀨erent
protocol types.
The following protocol types are available:
● Ethane analysis
● Device inspection
● Measurements
Protocols can only be cleared individually.
35
Page 44
3 Operation
You can nd information on how to clear all protocols of one pro­tocol type in section 3.3.7.

3.2.14 Device inspection

The device inspection can be used to check the general status and the indication accuracies. Device inspection only appears in the menu when the integrated device inspection is switched on.
Note:
The integrated device inspection is switched o󰀨 in the factory
settings. More detailed information about the device inspection can be found in section 5.1.
The frequency of the device inspection depends on the applica­tion (see section 5.1.1.2).
If the integrated device inspection is switched on, the device will remind you to perform a device inspection.
The Device inspection symbol will appear when the inspection is due. It is visible in the display until the complete integrated device inspection has been carried out successfully.

3.2.15 Gas type CxHy

You can temporarily change the gas type under the Gas type CxHy menu item, provided the device is designed for other
gas types. Gas types available for selection:
● Methane CH
● Propane C3H
● Butane C4H
10
The temporary gas type change is not saved. If you need to set a di󰀨erent default gas type, you can do this in the Settings menu item under System.
36
4
8
Page 45

3.2.16 Device information

The following device information is shown under Device infor­mation in the menu:
● Installed electrochemical sensors: gas, installation date, war-
ranted/expected lifetime
● Firmware: version, date
● Service: date of the last service, date of the next service

3.3 Settings

The following menus and menu items are included under Settings:
● Adjustment
● System
● Alarms
● Date/time
● Memory
You can nd information on selecting and exiting menus and
menu items in section 3.1.2
3 Operation

3.3.1 Opening settings

1. Press Menu.
WARNING!
A
2. Select Settings from the menu.
Risk to life due to absence of alarm
The device only issues alarms in measuring mode. As soon you open the menu, alarms are no longer triggered.
● Only adjust settings in areas where there is no risk of
explosion and where there is no toxic or low-oxygen atmosphere.
Access is protected by a PIN code. The default setting is always PIN code 0001.
37
Page 46
3 Operation
Adjustment
Exit
Note:
You can change the PIN code at any time.
SEWERIN recommends setting a di󰀨erent PIN code after initial
start-up so that only authorised personnel have access to the settings.
3. Enter the PIN code from left to right. The active digit is always displayed with a black background.
Digit To change To conrm
1st digit
Press the jog dial
2nd digit Press the jog dial
3rd digit Press the jog dial
Turn the jog dial
4th digit
If the PIN code has been entered correctly, the Settings menu
will appear once the last digit has been conrmed (g. 18).
Otherwise the device will revert to measuring mode.
38
System Alarms Date/time Memory
Fig. 18: Settings menu
Page 47

3.3.2 Settings menu structure

Measuring mode
3 Operation
Settings Adjustment Adjustment CH4 PPM
PIN Code
System PIN Code
Alarms
Date/time
Memory Clear
Exit
Adjustment CH4
Adjustment CO2
Adjustment O2
Adjustment CO
Adjustment H2S
Adjustment gas mixture warning
Adjustment gas mixture gas measuring
Test gas
Inspection OK
Exit
Service interval
Display
Battery
Autostart
Gas type CxHy
Unit %LEL
PPM multiplicator
Device inspection
Reset
Language
Exit
Interval
Memory mode
Exit
Fig. 19: Settings menu structure for EX-TEC HS 680 (gas type: meth-
ane)
Note:
The number and names of available menu items depend on the device model and optional additional equipment.
39
Page 48
3 Operation

3.3.3 Adjustment

The Adjustment menu is used to set the sensors.
WARNING! Danger of death due to incorrect adjust-
A
A detailed description of adjustment along with important infor­mation is provided in section 5.2.
Adjustment CxHy ppm
Used to adjust the gas-sensitive semiconductor for gas type CxHy (methane CH4, propane C3H8, butane C4H10) in the ppm range.
Applications: – Inspection above ground
ment
Incorrect adjustment can lead to incorrect measurement results. This means that the user may not be warned about dangerous gas concentrations in time.
● Only specialist technicians may perform adjustments.
● Adjustments must be made in well ventilated rooms or
in the open air.
– Ethane analysis – Plants – Structure
40
Adjustment CxHy
Used to adjust the infra red sensor for gas type CxHy (methane CH4, propane C3H8, butane C4H10) in the % vol. range / LEL range.
Applications: – Inspection above ground
– Measuring in bar holes – Ethane analysis – Plants – Structure – Gas measuring – Warning %LEL – Warning ExTox
Page 49
3 Operation
Adjustment CO2
Used to adjust the infrared sensor for carbon dioxide CO2 in the % vol. range.
Applications: – Measuring in bar holes
– Ethane analysis – Warning ExTox
Adjustment O2
Used to adjust the electrochemical sensor for oxygen O2 in the % vol. range.
Applications: – Measuring in bar holes
– Ethane analysis – Warning ExTox
Adjustment H2S
Used to adjust the electrochemical sensor for hydrogen sulphide H2S in the ppm range.
Application: – Warning ExTox
Adjustment CO
Used to adjust the electrochemical sensor for carbon monox­ide CO in the ppm range.
Application: – Warning ExTox
Adjustment gas mixture warning
Used to adjust the infrared and electrochemical sensors for all
components of the test gas (gas mixture).
Applications: – Warning %LEL
– Warning ExTox
Adjustment gas mixture gas measuring
Used to adjust the infrared sensors for methane CH4 and carbon dioxide CO2.
41
Page 50
3 Operation
Applications: – Measuring in bar holes
Test gas concentration
Used to adjust the concentration of the test gases used.
Inspection OK
Conrms the device is in proper working order. This extends the
service interval.

3.3.4 System

General information and specications for operation are set in
the System menu.
PIN code
Used to change or reset the PIN code.
Note:
If you lose the PIN code, you must contact SEWERIN Service. If the PIN code is set to 0000, you will not be asked to enter it. The settings can then be accessed by anyone.
– Ethane analysis – Gas measuring
42
Service interval
Species the regular inspections/maintenance required for the device. You can also activate the automatic switch-o󰀨 function
once the set interval has passed.
Display
Used to set how long the display remains illuminated after any key is pressed as well as the display contrast.
Page 51
3 Operation
Battery
Used to set the type of disposable/rechargeable battery used.
NOTICE! Damage possible due to device overheating
If the battery type is not correctly set, the device can overheat.
● Always enter the correct battery type.
Autostart
Sets the application that is automatically activated when the de­vice is switched on.
Gas type CxHy
Sets the gas type (methane CH4, propane C3H8, butane C4H10) which is automatically used when the device is switched on.
Unit %LEL
Used to set the unit of measurement. Only applies to Warning %LEL and Warning ExTox applications.
PPM multiplicator
Set the amplication factor for the lower ppm range.
Measurement x factor = displayed measurement
Application: – Inspection above ground
Device inspection
Used to switch the integrated device inspection on or o󰀨.
Factory settings
Used to reset the device settings to the factory settings.
Language
Sets the language.
43
Page 52
3 Operation

3.3.5 Alarms

Sets the alarm thresholds for the gas types and gases.
Alarm AL3 cannot be set. It always occurs at the end of the measuring range.
There is detailed information on alarms in section 7.2.
AL1 alarm
Used to set the pre-alarm.
Applications: – Plants
AL2 alarm
Used to set the main alarm.
Applications: – Plants
– Structure – Warning %LEL – Warning ExTox
– Structure – Warning %LEL – Warning ExTox
AL4 alarm
Used to set the alarm threshold in excess of signicant gas con­centrations which indicate a gas leak.
Application: – Inspection above ground

3.3.6 Date/time

Used to set the time, day, month and year. There are two formats available for the date.

3.3.7 Memory

The Memory menu is used to specify how measurement data and protocols are handled.
44
Page 53
3 Operation
Clear
Used to clear protocols.
The di󰀨erent protocol types must each be cleared separately. All
protocols in one protocol type are cleared at once. You can nd information on clearing individual protocols in sec-
tion 3.2.13.
Interval
Sets the interval at which measurement data is automatically saved.
Memory mode
Switches between ring memory and stack memory.
45
Page 54

4 Power supply

4 Power supply
This device can be operated using:
● Disposable (non-rechargeable) alkaline batteries
● Rechargeable NiMH batteries
The device comes with nickel metal hydride rechargeable batter­ies. The corresponding settings are stored.
WARNING! Risk of explosion from leaking batteries
A

4.1 Suitable disposable/rechargeable battery types

Leaking electrolyte can reduce the creepage distance and air gaps between the poles. This may mean that the batteries no longer meet the required standards.
● Replace leaking batteries immediately.
● Clean the battery compartment (and, if necessary, the device) before inserting the new disposable/recharge­able batteries.
46
A
WARNING! Risk of explosion due to unsuitable bat­teries
To ensure that the device remains explosion-proof in ac­cordance with /16/, only certain disposable/rechargeable batteries may be used.
● Only use batteries supplied by SEWERIN. Other dis- posable/rechargeable batteries, which have not been supplied by SEWERIN, may only be used if they meet the requirements of /8/.
● In each battery compartment use only batteries that are identical with respect to type (disposable or recharge-
able), capacity and manufacturer.
Page 55
4 Power supply
Disposable battery requirements
● Disposable alkaline batteries
● Size: AA, type: LR6 as per /11/
● The creepage distance and air gap between the poles must
not be less than 0.5 mm in accordance with /8/.
Rechargeable battery requirements
● NiMH rechargeable batteries
● Size: AA, type: HR6 as per /13//
● The creepage distance and air gap between the poles must
not be less than 0.5 mm in accordance with /8/.
● The rechargeable batteries must be fast charging (I > 1.25 A)
and remain within the temperature range.
Note:
A device operated with disposable alkaline batteries cannot be
charged. A note to this e󰀨ect is shown on the display.

4.2 Operation with rechargeable batteries

The operating time of the device depends on the battery capacity.
If the device is not used or not kept in the docking station, the batteries will lose their charge due to self-discharge. The self-dis­charge intensity depends on the battery type.
47
Page 56
4 Power supply

4.2.1 Charging

The device can be charged via:
● Connection for power supply
● Docking station TG8
DANGER! Risk of explosion from sparks
A
For charging you will need either:
Please note the following points:
High charging amperage occurs when charging batteries in explosive areas. The mains adapter is not explosion proof.
● AC/DC adapter M4
● Vehicle cable M4
● The device or docking station must not be directly connected
to a 24-V on-board power supply in the vehicle. The voltage is too high for the charging process.
● The battery should be charged at approximately room tem-
perature.
● Several TG8 docking stations must not be connected in series
(cascaded).
● Only ever charge the device outside of explosive areas.
48
Page 57

4.2.2 Rechargeable battery maintenance

If the device is not used for a long period of time, it is advisable to fully discharge the battery before recharging it again.
A full discharging and recharging process takes approx. 11 hours (8 hours to discharge + 3 hours to recharge). The duration de­pends on the capacity of the rechargeable batteries used.
DANGER! Risk of explosion from sparks
A
High charging amperage occurs when charging batteries in explosive areas. The mains adapter is not explosion proof.
● Only ever charge the device outside of explosive areas.
● Connect the device (switched on) to the power supply via the
side connection
OR
Place the device (switched on) into the docking station.
The rechargeable batteries will be fully discharged. Once the device has been discharged, it will automatically switch to charging mode.
4 Power supply

4.3 Battery alarm

As soon as the remaining capacity of the batteries gets low, a
battery alarm will go o󰀨:
Level 1: Battery almost empty
Level 2: Battery empty
– Battery capacity symbol ashes – Audible signal (one-o󰀨) – Operating signal doubles – Remaining operating time: approx. 15 min
– Blank display apart from Battery capacity sym-
bol – Continuous audible signal – Measuring mode unavailable – Device shuts o󰀨
49
Page 58
4 Power supply

4.4 Replacing disposable/rechargeable batteries

DANGER! Risk of explosion from sparks
A
A 2.5 mm Allen key (supplied) is required to open the battery
compartment on the back of the device.
1. Loosen the two screws securing the battery compartment. Re-
2. Lift out the battery compartment.
3. Remove the disposable/rechargeable batteries and insert new
4. Replace the battery compartment so it ts neatly into place
5. When you switch the device back on again, you will be asked
If it takes longer than 120 seconds to replace the batteries, the date and time will have to be reset the next time you switch the device on. All the other data will be saved.
The device is not explosion proof when the housing is open.
● Only ever open the battery compartment outside of
explosive areas.
move the screws by repeatedly turning them alternately a short way; this ensures that the battery compartment does not twist.
ones. Ensure that the batteries are inserted with the correct polarity.
and secure rmly with the screws.
which battery type is in use. Enter the correct battery type.
50
Page 59
5 Maintenance
In accordance with the legal regulations, device maintenance comprises the following elements:
● Device inspection including test of indication accuracy
● Adjustment
● Servicing
All inspections must be documented. The documentation must be retained for at least one year.
WARNING! Risk to life from using miscalibrated or
A
faulty devices If the device is used as a gas warning instrument (Warn­ing %LEL and Warning ExTox applications), it must be
regularly checked before use.
● Carry out a device inspection each day before starting work (as per /1/, /2/, /6/, /10/).

5 Maintenance

5.1 Device inspection

5.1.1 General information on the device inspection

5.1.1.1 Scope
The device inspection includes the following tests:
● Analysis of the general status
● Test of the indication accuracy with supply of fresh air
● Test of the indication accuracy with supply of test gas
51
Page 60
5 Maintenance
5.1.1.2 Frequency
The frequency of the device inspection depends on the appli­cation.
Application When to test Legal basis
Inspection above ground
Plants Weekly to every six
Measuring in bar holes
Structure
Gas measuring
Warning %LEL Every day before starting
Warning ExTox /1/, /2/, /6/, /10/
Ethane analysis Quarterly
If the integrated device inspection is switched on, the device will remind you to perform a device inspection.
The applications are grouped together for the device inspection. The device inspection must be performed separately for each group.
Before starting work and if out of use for long pe­riods
months
work
/3/
/3/
/2/, /10/
52
Devices with multiple gas types
For devices that are designed for multiple gas types, the device inspection must be carried out for the gas type currently being used. The device inspection can also be carried out for other available gas types.
Note:
If the device inspection symbol appears after changing the gas type, the device inspection must always be carried out immedi­ately.
Page 61
5.1.1.3 Documentation
The device inspection procedure must be documented. There are two ways of doing this:
● On paper
● Saved electronically supported by the device (integrated de-
vice inspection)
Only the integrated device inspection is described in these op­erating instructions.
Note:
If the integrated device inspection is switched o󰀨, the device in­spection must be documented on paper.
5.1.1.4 Integrated device inspection
The integrated device inspection is accessed via the menu (/7).
The results of the device inspection are stored in the device as a protocol.
The device inspection protocols can be opened at any time (see section 3.2.13). They can also be displayed on a computer using a
readout program. The program is available at www.sewerin.com.
5 Maintenance
The Perform device inspection symbol appears when a device inspection is due. It is visible in the display until the complete integrated device inspection has been car­ried out successfully for the selected application. If the device inspection was completed but the device failed on some points, the symbol will remain visible.
The integrated device inspection is switched o󰀨 in the factory
settings. The integrated device inspection has to be switched on
(once only) before it can be performed.
Switching on the integrated device inspection
1. Press Menu.
2. Select Settings.
53
Page 62
5 Maintenance
3. Enter your PIN code.
4. Select System.
5. Select Device inspection.
6. Select Yes.
7. Apply the setting with OK.
8. Exit the settings with Back.
5.1.1.5 Order
You can carry out the device inspections and the associated
tests for the applications (groups) that are due to be inspected
in any order you wish. You can repeat the tests as often as you wish provided you have not yet concluded the device inspection for a group.
5.1.1.6 Test gases for the device inspection
The following variables depend on the application:
● Number of tests with test gas
● Test gases to be used
54
Page 63
5 Maintenance
The following test gases can be used to check the indication ac­curacy when supplying test gas:
Application (group)
Inspection above ground
Bar holes/ Gas measuring
Structure/plants Test gas CH4 1 % vol. CH
Test Recommended test
gases
Test gas 10 ppm
10 ppm CH
*)
4
in 10 seconds
Test gas CH4 100 % vol. CH
Test gas CO2 20 % vol. CO
Test gas C3H8 100 % vol. C3H
Test gas CO 40 ppm CO
Test gas C3H8 1 % vol. C3H
4
2
8
*)
4
*)
*)
8
Warning Gas mixture ExTox IR
Test gas C3H8 1 % vol. C3H
Test gas C4H10 1 % vol. C4H
Ethane analysis Test gas 50/100
PPM C2H6
100 ppm C2H6 in 1 % vol. CH4 (balance: syn-
8
10
thetic air)
*)
in synthetic air
If a test can be carried out either with a gas mixture or with an individual gas, SEWERIN recommends you use the gas mixture.
If a gas mixture is used, but the device is equipped for other gas types and gases which are not contained in the gas mixture, these must be additionally tested with the relevant individual gas.
Note:
Use of test gases not provided by SEWERIN can cause inter­ference.
The concentration of the test gas used must match the specied
test gas concentration.
55
Page 64
5 Maintenance
Inspection above ground
Ethane analysis
Changing the test gas concentration
If no test gas with the specied concentrations is available for
the test, the values can be changed according to the test gas used under Test gas in the adjustment menu (see section 3.3.3).

5.1.2 Performing the device inspection

5.1.2.1 Accessing the device inspection
The device is in measuring mode.
1. Press Device inspection.
OR
a) Press Menu. b) Select Device inspection from the menu.
The Device inspection menu appears.
Bar holes/measuring Structure/Plants Warning
Fig. 20: Device inspection menu
2. Selecting an application (group).
The Dev. Test ... menu appears.
3. Select a test (under General status, Fresh air, Test gas …).
Note:
The number and names of the available menu items depend on the device features.
4. Carry out the test.
For detailed information, refer to the following sections:
− General status section 5.1.3
− Fresh air section 5.1.4
− Test gas … section 5.1.5
56
Page 65
5.1.2.2 Concluding the device inspection
After all the tests have been carried out as described in sec­tion 5.1.3 to 5.1.5, the Save symbol will appear in the display.
An integrated device inspection is concluded by saving it. Up to 40 device inspections can be saved. The following information can be stored along with the device inspection:
● Inspector (e.g. inspector's name or initials)
● Password to protect the protocol from being accessed by un-
authorised people
Inspector entries are saved automatically (ring memory with max.
10 entries).
Once the rst inspector has been entered, the Open
stored inspectors function will become available.
1. Press Save.
2. Enter the name of the inspector.
a) Select the characters required using the jog dial. Conrm
each character using the jog dial.
OR
− Press Open stored inspectors. A list of the stored in-
spectors will appear.
− Select the desired inspector. Open the inspector with OK.
b) Then conrm your entry/selection with OK.
OR
Press Esc if you do not wish to enter an inspector for the device inspection.
3. Enter a password.
a) Select the characters required using the jog dial. Conrm
each character using the jog dial.
b) Then conrm your entry with OK.
OR
Press Esc if you do not wish to enter a password for the device inspection.
5 Maintenance
57
Page 66
5 Maintenance
The device inspection is saved as a protocol. An overview with the device inspection results is displayed.
This overview includes a list of all gas types for which the de-
vice is congured. Gas types for which the indication accuracy was successfully tested in the device inspection are agged
with OK. Gas types that are available but have not been tested are agged with ----.
4. Conrm the overview by pressing OK. The device returns to
measuring mode.

5.1.3 Testing the general status

The general status test is part of the device inspection (see sec­tion 5.1.1.1). It is based on estimations by the user. The following must be tested:
● Housing
● Signals
● Probe
● Filter
● Pump
The battery charge status and the working condition of the controls are automatically tested during the integrated device inspection.
The device inspection has been opened.
1. Select General status from the Dev. Test ... menu.
2. Test all associated subitems as described in section 5.1.3.1 to 5.1.3.5.
3. Conrm the prompt General status OK? by pressing Yes if
all subitems show no faults during testing. General status OK appears on the display.
This concludes the General status test.
5.1.3.1 Housing
● Is the housing free from external damage?
58
Page 67
5.1.3.2 Signals
During the integrated device inspection the signals are emitted at short intervals.
● Can the audible signal be heard?
● Is the visual signal visible?
5.1.3.3 Probe
Probes are accessories. They only need to be tested if they are likely to be used in the course of the working day.
● Are the probes free from external damage?
Probe hoses are tested with a simple leak check.
1. Connect the probe hose to the gas input.
2. Seal the free end of the probe hose.
An error message should appear after approx. 10 seconds. This indicates that the probe hose is in good condition.
5.1.3.4 Filter
The ne dust lter is located behind the gas input. It is tested by means of a visual inspection.
1. Unscrew the gas input.
2. Remove the ne dust lter.
3. Check that there is no dirt in the ne dust lter.
As soon as there are any signs of deposits, the lter must be replaced. If you do not replace the lter, you must reinsert it
exactly as you found it.
5 Maintenance
5.1.3.5 Pump
The pump function is tested with a simple leak check.
1. Seal the gas input.
After a maximum of 10 seconds an error message should ap­pear. This indicates that the pump is working correctly.
If the error message does not appear, the pump may be faulty. The device must be tested by SEWERIN Service.
59
Page 68
5 Maintenance
2. Release the gas input again.
After approximately 5 seconds, the error message should disappear again. Otherwise there is a fault (see section 6).

5.1.4 Testing indication accuracy with supply of fresh air

The indication accuracy with supply of fresh air test is part of the device inspection (see section 5.1.1.1).
The device inspection has been opened.
1. Make sure that only fresh air is being drawn in.
2. Select Fresh air from the Dev. Test ... menu.
3. Wait until the displayed readings are stable. A Status: OK message will appear.
4. Press OK to conrm. Fresh air OK will appear on the display.
This concludes the Fresh air test.
If the Status: OK message does not appear within a reasonable
amount of time, the air inow does not correspond to the limit
values stored in the device (see section 7.3). Move the device somewhere else and repeat the test.
If the Status: OK message still does not appear when the test is repeated, the device must be re-adjusted (see section 5.2).

5.1.5 Testing indication accuracy with supply of test gas

The indication accuracy with supply of test gas test is part of the device inspection.
All test gases specied in the device must be tested. The number of specied test gases depends on the model and the optional
additional equipment.
The following resources are needed for the test:
● Test gas (e.g. gas mixture ExTox IR)
Information on test gases for the device inspection can be found in section 5.1.1.6.
● Test set for the supply of test gas (e.g. SPE VOL)
60
Page 69
5 Maintenance
Note:
Details of how to use the test set can be found in the accompa­nying operating instructions.
The procedure for testing with a gas mixture and individual gas is the same.
The device inspection has been opened.
1. On the Dev. Test … menu, select the menu item to be tested
(e.g. Gas mixture, Test gas C3H8, etc.).
2. Check whether the test gas concentration specied by the
device matches the test gas you intend to use. To do this press Information.
Note: When testing the indication accuracy for Inspection above ground using test gas 10 ppm in 10 seconds it is not possible
to check the test gas concentration. Instead, a message will ap­pear explaining what steps need to be carried out.
3. Add the test gas
4. Wait until the displayed readings are stable. A Status: OK
message will appear.
5. Press OK to conrm.
6. Stop the test gas supply.
The device switches back to the Dev. test… menu. A Test gas … OK message will appear.
7. Repeat for further test gases if applicable.
Once all tests have been successfully completed, the complete test of the indication accuracy with supply of test gas is also complete.
61
Page 70
5 Maintenance
Test gas test unsuccessful
If a Test gas … test was not carried out successfully, the mes- sage Test gas not OK appears.
A test may be unsuccessful for the following reasons:
Cause Corrective action
Connections leaking Repeat check, checking the
Measurement values outside
the specied limit values (see section 7.3)

5.2 Adjustment

WARNING! Danger of death due to incorrect adjust-
A
ment
Incorrect adjustment can lead to incorrect measurement results. This means that the user may not be warned about dangerous gas concentrations in time.
● Only specialist technicians may perform adjustments.
● Adjustments must be made in well ventilated rooms or
in the open air.
seal on the connections
Adjustment required (see section 5.2)

5.2.1 Scope

Adjustments must be made separately for each measuring range.
● Zero point
● Sensitivity
Note:
For each measuring range always adjust the zero point rst, fol­lowed by the sensitivity.
Only gases for which the readings are outside the predened
limits need to be adjusted during the adjustment process (see section 7.3).
62
Page 71

5.2.2 Test gases for the adjustment

The following test gases can be used for adjustment:
Gas Suitable test gases for
Zero point Sensitivity
CH4 ● Fresh air ● Gas mixture
C3H8 ● Fresh air ● 1 % vol. C3H
C4H10 ● Fresh air ● 1 % vol. C4H CO ● Fresh air ● Gas mixture
CO
2
● Fresh air ● Gas mixture
H2S ● Fresh air ● Gas mixture
O2 ● Gas mixture
(free from O2)
*)
in synthetic air
● 100 % vol. CH
4
5 Maintenance
● 10 ppm CH
● 100 ppm CH
*)
4
4
● 1000 ppm CH
● 1.0 % vol. CH
● 2.2 % vol. CH
● 100 % vol. CH
*)
8
● 100 % vol. C3H
10
● 40 ppm CO
● 2.0 % vol. CO
● 20 % vol. CO
2
● 40 ppm H2S
● Fresh air
*)
*)
4
*)
4
*)
4
4
8
2
If more than one test gas can be used to adjust a gas, it does not have to be adjusted with all test gases. However, adjusting with more than one test gas increases the measurement quality.
Every gas must be adjusted separately, Except for adjustment with a gas mixture (see section 5.2.3).
Fresh air contains 20.9 % vol. O2 and is therefore used with ox­ygen to adjust the sensitivity.
Propane C3H8 and butane C4H10 can only be adjusted with indi­vidual gas.
63
Page 72
5 Maintenance
Note:
Use of test gases not provided by SEWERIN can cause inter­ference.
The concentration of the test gas used must match the specied
test gas concentration.

5.2.3 Special features of adjustment with gas mixture

If a SEWERIN gas mixture is used as a test gas, several gases can be adjusted in a single step.
SEWERIN recommends a gas mixture comprising the test gas ExTox IR (2.2 % vol. CH4, 2.0 % vol. CO2, 40 ppm CO and 40 ppm H2S in N2).
Gases which can be adjusted simultaneously with a SEWERIN gas mixture
64
Test gas: ExTox IR Menu item:
Adjustment gas mixture warning
Test gas: 60 % vol. CH4, 20 % vol. CO2 in N
2
Menu item:
Adjustment gas mixture gas measuring
● Methane CH
4
● Carbon dioxide CO
● Oxygen O
2
2
● Methane CH
4
● Carbon dioxide CO
● Oxygen O
2
2
● Hydrogen sulphide H2S
● Carbon monoxide CO
Zero point
The zero point is adjusted under Fresh air in the menu. The following parameters are adjusted in a single step:
● Zero points of CH4, CO2, H2S and CO
● Sensitivity of O2
Page 73
Sensitivity
The sensitivity is adjusted under Gas mixture in the menu. The following parameters are adjusted in a single step:
● Sensitivities of CH4, CO2, H2S and CO
● Zero point of O2

5.2.4 Preparation

Carrying out an adjustment always takes some time. Leave your­self plenty of time to prepare the necessary steps of the procedure.
● Have all necessary tools available.
● Let the device run for several minutes,to guarantee that the
temperature is correct, for example.
Note: When adjusting the gas-sensitive semiconductor (Inspection above ground and Structure/Plants groups), you must apply
a conditioner.
● SEWERIN recommends applying separate conditioners for
methane CH4 on the one hand and propane C3H8 / butane C4H10 on the other.
● The conditioner must already be connected during the run-
ning-in period.
5 Maintenance

5.2.5 Performing the adjustment

The zero point and sensitivity are adjusted following the same procedure for all gases. The adjustment of oxygen is an excep- tion. For this reason it is described separately (see section 5.2.6).
You can access detailed information on the adjustment of the various gases (for example, test gas concentra­tion, installation date of the sensor, or date of the last adjustment) under Information.
The symbol appears after the corresponding Adjust- ment … menu item has been selected.
65
Page 74
5 Maintenance
5.2.5.1 Adjusting the zero point
For all gases except oxygen O2, the zero point is adjusted follow­ing the same procedure.
Note:
When adjusting the zero point of carbon dioxide CO2, a carbon
dioxide lter must be used.
This applies to both the zero point adjustment for Adjustment CO2 in the menu and Adjustment gas mixture warning.
1. Make sure that only fresh air is being drawn in.
2. Open Settings.
3. Select Adjustment menu item.
4. Select the desired adjustment (for example, Adjustment CH4,
Adjustment gas mixture warning).
5. Wait at least 1 minute. The displayed reading must be stable.
Note: For Adjustment gas mixture warning and Adjustment gas mixture gas measuring, all values must be stable. The time
required for this can vary depending on the specic gas.
6. From the menu select the method you wish to use to adjust the zero point.
− e.g. for Adjustment CH4: Zero point
− e.g. for Adjustment gas mixture warning: Fresh air
7. Press OK to conrm.
This adjusts the zero point. The reading shows zero (0.00 % vol. / 0 ppm). (Except for Adjustment gas mixture…: menu item: the value for oxygen O2 is 20.9 % vol.)
5.2.5.2 Adjusting the sensitivity
For all gases except oxygen O2, the sensitivity is adjusted follow­ing the same procedure.
66
Page 75
5 Maintenance
The following resources are needed for adjusting the sensitivity:
● Test gas
Information on test gases for adjustment can be found in Sec­tion 5.2.2.
● Test set for the supply of test gas (e.g. SPE VOL)
Note:
Details of how to use the test set can be found in the accompa­nying operating instructions.
Note:
A carbon dioxide lter must never be used when adjusting the sensitivity.
1. Connect the device to the test set.
2. Open Settings.
3. Select Adjustment menu item.
4. Select the desired adjustment (for example, Adjustment CH4,
Adjustment gas mixture warning).
5. Select the menu item that species the sensitivity to be tested.
− e.g. for Adjustment CH4: 2.20 % VOL CH4
− e.g. for Adjustment gas mixture warning: Gas mixture
Do not conrm with OK yet.
6. Press and hold the release button on the test set. The test gas
is added. Do not let go of the release button.
7. Wait at least 1 minute. The displayed reading must be stable.
Note: For Adjustment gas mixture warning and Adjustment gas mixture gas measuring, all values must be stable. The time
required for this can vary depending on the specic gas.
67
Page 76
5 Maintenance
8. Press OK to conrm. The device is adjusted. The reading shows the specied value (for example, 2.20 % vol. CH4).
9. Let go of the release button on the test set.

5.2.6 Carrying out an oxygen adjustment

As oxygen is a component of fresh air, the procedure for adjusting
oxygen is di󰀨erent from the procedure for all other gases.
5.2.6.1 Adjusting the zero point for oxygen
The zero point for oxygen must be adjusted using a gas which contains no oxygen and does not damage the sensor.
The following resources are needed for adjusting the zero point of oxygen:
● Test gas
Information on test gases for adjustment can be found in sec­tion 5.2.2.
● Test set for the supply of test gas (e.g. SPE VOL)
68
Note:
Details of how to use the test set can be found in the accompa­nying operating instructions.
1. Connect the device to the test set.
2. Open Settings.
3. Select Adjustment menu item.
4. Select Adjustment O2 menu item.
5. Select Zero point menu item. Do not conrm with OK yet.
6. Press and hold the release button on the test set. The test gas is added. Do not let go of the release button.
7. Wait at least 1 minute. The displayed reading must be stable.
8. Press OK to conrm. The device is adjusted. The reading
shows zero (0.0 % vol.).
9. Let go of the release button on the test set.
Page 77
5.2.6.2 Adjusting the sensitivity for oxygen
The sensitivity for oxygen is adjusted with fresh air.
1. Make sure that only fresh air is being drawn in.
2. Open Settings.
3. Select Adjustment menu item.
4. Select Adjustment O2 menu item.
5. Wait until the displayed reading is stable. (The reading may
still ash.)
6. Select 20.9 % VOL. (fresh air) from the menu (select and
conrm with OK). This adjusts the sensitivity. The reading
shows 20.9 % vol.

5.3 Servicing

The device must only be serviced and repaired by SEWERIN Service.
● Send the device to SEWERIN for repairs and for annual main-
tenance.
5 Maintenance
Note:
If there is a service agreement in place, the device can be ser­viced by the mobile maintenance service.
The inspection plate on the device shows con-
rmation of the last maintenance and the next
scheduled maintenance.
Fig. 21: Inspection plate
69
Page 78

6 Faults

6 Faults
If a fault occurs during operation, an error message will appear on the screen.
Error messages are displayed in the order in which they occur.
Up to ve errors can be displayed.
Error messages continue to be displayed until the error is cor­rected.
Overview of possible error messages
Error code
8 No calibration
9 No calibration
10 Adjustment failed
11 Zero point
52 XFLASH
59 Error unknown
62 IR sensor Error can only be corrected by
100 Pump error
200 I2C HOST – IR
201 I2C HOST – EC
202 I2C HOST – EX
Error message on the display
PPM sensor adjustment
IR sensor adjustment
Test gas
Adjustment required
SEWERIN Service
SEWERIN Service
Probe/lter
SEWERIN Service
SEWERIN Service
SEWERIN Service
Error correction
Adjustment CxHy ppm required
Adjustment required (adjust-
ment CxHy, adjustment CO2, adjustment gas mixture …)
Check test gas concentration
Adjustment required
Error can only be corrected by SEWERIN Service
Error can only be corrected by SEWERIN Service
SEWERIN Service
Check all lters, probes and hose
connections for porosity and dirt
Error can only be corrected by SEWERIN Service
Error can only be corrected by SEWERIN Service
Error can only be corrected by SEWERIN Service
70
Page 79
7 Appendix
7.1 Specications and permitted operating conditions
Dimensions (W×D×H): Approx. 148 × 57 × 205 mm
Approx. 148 × 57 × 253 mm with supporting
bracket Weight: Approx. 1000 g, depending on equipment Operating position: Any Protection rating: IP54 Power supply: 4 cells, either:
– rechargeable batteries: NiMH
– disposable batteries: Alkaline Operating time: Minimum 8 h Charging time for re-
chargeable batteries: Charging voltage: 12 V DC (max. 1 A) Operating temperature: -20 ºC – +40 ºC Storage temperature: -25 ºC – +60 ºC Pressure: 950 – 1100 hPa Permissible relative
humidity: Sensors: – IR for ammable gases (CH4, C3H8, C4H10)
Adjustable gas types: – Methane CH
Warm-up time: – < 30 s
PC connection: USB Memory: 8 MB Display: 320 × 240 pixels Buzzer: Frequency: 2.4 kHz
Signal light: Red Pump: Vacuum: > 250 mbar
Approx. 3 h (full charge), depending on capacity
5 – 90 % r.h., non-condensing
– IR for CO
2
optional:
– EC for O2, H2S, CO
optional:
4
– Propane C3H
– Butane C4H
8
10
– Up to 90 s for EC
– Up to 5 min for gas-sensitive semiconductor
Volume: 80 dB (A) / 1 m
Volume ow: Typically 50 l/h ±20 l/h Pump error (F100) depending on volume ow:
– ≤ 20 l/h F100 certain
– > 20 l/h – ≤ 35 l/h F100 possible

7 Appendix

71
Page 80
7 Appendix
Pressure at gas input: 100 mbar, maximum Operation: – ON/OFF key

7.2 Alarms

WARNING! Risk to life from dangerous gas concen-
A
trations
An alarm always indicates danger.
The type of action depends on the situation. In the event of a
pre-alarm, it may be su󰀩cient to ventilate thoroughly. In the event
of a main alarm, it may be necessary to leave the danger zone immediately.

7.2.1 Features

– Jog dial – 3 function keys
● Take all necessary measures for your own safety and
the safety of others immediately.
72
AL1
Type: Pre-alarm Adjustable: Yes Latching: No Trigger: Alarm threshold AL1 exceeded Indicator: – Audible signal
– Visual signal – AL1 notication on display
Acknowledge­ment:
Reset: – Automatic when level falls below alarm threshold
– Possible for audible signal when alarm threshold
AL1 is exceeded
AL1
Exception for oxygen: alarm AL1 is triggered when the level falls below alarm threshold AL1.
Page 81
7 Appendix
AL2
Type: Main alarm Adjustable: Yes Latching: Yes Trigger: AL2 alarm threshold exceeded Indicator: – Audible signal
– Visual signal – AL2 notication on display
Acknowledge­ment:
Reset: – By acknowledgement after level falls below alarm
– Possible for audible signal when alarm threshold
AL2 is exceeded
– Possible overall after level falls below alarm thresh-
old AL2
threshold AL2
– By switching device o󰀨
Exception for oxygen: alarm AL2 is not latching.
AL3
Type: End of measuring range Adjustable: No Latching: Yes Trigger: AL3 alarm threshold exceeded Indicator: – Audible signal
– Visual signal – AL3 notication on display – Reading ashes
Acknowledge­ment:
Reset: – By acknowledgement after level falls below alarm
– Possible after level falls below alarm threshold AL2
threshold AL2
– By switching device o󰀨
73
Page 82
7 Appendix
AL4
STEL
Type: Warning of gas concentration in ppm range Adjustable: Yes Latching: No Trigger: Alarm threshold AL4 exceeded Indicator: – Audible signal
– Visual signal – AL4 notication on display
Acknowledge­ment:
Reset: – Automatically when level falls below alarm threshold
Type: Main alarm (Short Time Exposure Limit) Adjustable: No Latching: Yes Trigger: Sum of the concentrations of a gas is greater than
Indicator: – Audible signal
Acknowledge­ment:
Reset: – By changing to another application
– Possible for audible signal when alarm threshold
AL4 is exceeded
AL4
the product of the OEL and the excess factor over the averaging time
– Visual signal – STEL notication on display
– Not possible
– By switching device o󰀨
74
LTEL
Type: Main alarm (Long Time Exposure Limit) Adjustable: No Latching: Yes Trigger: Sum of the concentrations of a gas is greater than the
OEL over the averaging time
Indicator: – Audible signal
– Visual signal – LTEL notication on display
Acknowledge­ment:
Reset: – By changing to another application
– Not possible
– By switching device o󰀨
Page 83
7 Appendix

7.2.2 Occupational exposure limits (OEL) and excess factors (STEL and LTEL)

The short-time exposure limit (STEL) is calculated by multiplying
the OEL by the excess factor over an averaging time of 15 min­utes, as per /15/.
The long-time exposure limit (LTEL) is obtained from the OEL
over an averaging period of 8 hours, as per /15/.
Gas OEL Excess factor
CO
2
H2S 5 ppm 1
CO 30 ppm 1
0.50 % vol. 2

7.2.3 Alarm thresholds (factory settings)

Gas AL1 AL2 AL3 AL4 STEL LTEL
CH410 % LEL 50 % LEL 100 % LEL 3 ppm — —
C3H810 % LEL 50 % LEL 100 % LEL 3 ppm — —
C4H1010 % LEL 50 % LEL 100 % LEL 3 ppm — —
CO20.50 % vol. 1.00 % vol. 5 % vol. — 1.00 % vol. 0.50 % vol.
O218.0 % vol. 23.0 % vol. 25 % vol. — — —
H2S 5 ppm 20 ppm 100 ppm — 5 ppm 5 ppm
CO 30 ppm 60 ppm 500 ppm — 30 ppm 30 ppm
75
Page 84
7 Appendix

7.2.4 Setting ranges for gas types

LEL values are specied as per /12/ and /14/.
The setting for AL1 must not exceed the setting for AL2.
Gas type AL1 AL2
All CxHy in % LEL
CH
4
C3H
C4H
CO
2
O
2
H2S
CO
Threshold 10 % LEL 50 % LEL
Threshold 0.45 % vol. 2.20 % vol.
Setting range 0.20 – 2.60 % vol. 0.25 – 2.65 % vol.
Increment 0.05 % vol. 0.05 % vol.
Threshold 0.17 % vol. 0.86 % vol.
Setting range 0.08 – 1.00 % vol. 0.10 – 1.02 % vol.
8
Increment 0.02 % vol. 0.02 % vol.
Threshold 0.14 % vol. 0.7 % vol.
Setting range 0.08 – 0.82 % vol. 0.10 – 0.84 % vol.
10
Increment 0.02 % vol. 0.02 % vol.
Threshold 0.5 % vol. 1.0 % vol.
Setting range 0.1 – 4.99 % vol. 0.11 – 5.0 % vol.
Increment 0.01 % vol. 0.01 % vol.
Threshold 18.0 % vol. 23.0 % vol.
Setting range 0.5 – 20.5 % vol. 21.2 – 25.0 % vol.
Increment 0.1 % vol. 0.1 % vol.
Threshold 5 ppm 20 ppm
Setting range 5 – 99 ppm 6 – 100 ppm
Increment 1 ppm 1 ppm
Threshold 30 ppm 60 ppm
Setting range 5 – 499 ppm 6 – 500 ppm
Increment 1 ppm 1 ppm
76
Factory settings in bold
Page 85

7.3 Limit values for the device inspection

Gas Zero point Sensitivity
Specication Deviation Specication Deviation
CH40.00 % vol. ±0.15 % vol. 2.20 % vol. ±0.20 % vol.
C3H80.00 % vol. ±0.12 % vol. 1.00 % vol. ±0.16 % vol.
C4H100.00 % vol. ±0.12 % vol. 1.00 % vol. ±0.16 % vol.
CO20.04 % vol. ±0.06 % vol. 2.00 % vol. ±0.20 % vol.
O
0 % vol. ±0.5 % vol. 20.9 % vol. ±0.5 % vol.
2
H2S 0 ppm ±3 ppm 40 ppm ±3 ppm
CO 0 ppm ±3 ppm 40 ppm ±3 ppm
7 Appendix
77
Page 86
7 Appendix

7.4 Memory capacity

The total memory capacity of the device is divided up as follows:
Protocol type Maximum number of storable protocols
Ethane analysis 40
Device inspection 40
Measurement 160
There is a choice of two memory modes (see section 3.3.7). The selected memory mode applies for all protocol types.
Measurements
Note: A le is saved after each Start measurement – Stop meas- urement cycle, regardless of whether the memory capacity is
exhausted.
Each le has a maximum memory capacity of 1800 data records. This means: that a le can record data for 30 min (0.5 h) at a
save interval of 1 second. After this, data recording continues
automatically in the next le.
78
Save interval
1 s 0.5 h 40 h
2 s 1 h 80 h
5 s 2.5 h 200 h
10 s 5 h 400 h
20 s 10 h 800 h
Factory settings in bold
Save time for 1 le (1800
data records)
Save time for 80 les (max.
memory capacity)
Page 87

7.5 Sensors

Note:
Probes increase the stated response times.

7.5.1 Infrared sensors (IR)

7.5.1.1 Methane CH4, propane C3H8, butane C4H10 for
Warning %LEL and Warning ExTox
Type: Infrared sensor Measuring range: 0 – 100 % LEL Measuring error:
– CH
4
– C3H8
Response times:
– CH
4
– C3H8, C4H
10
Temperature range: -20 ºC – +40 ºC Interference: All hydrocarbons CxH Lifetime:
– Warranted – Expected
Test gases:
– Zero point – Sensitivity
As per /9/
±1 % LEL (short-term stability) ±4 % LEL (long-term stability) ±1 % LEL (short-term stability) ±1 % LEL (long-term stability)
t50 < 8 s t90 < 14 s t50 < 9 s t90 < 17 s
y
2 years 5 years
Fresh air
2.20 % vol. CH
1.00 % vol. C3H
1.00 % vol. C4H
4
8
10
7 Appendix
79
Page 88
7 Appendix
7.5.1.2 Methane CH4, propane C3H8 for gas measuring
Type: Infrared sensor Measuring range: 0 – 100 % vol. Measuring error CH4: ±3 % vol. Response times:
– CH – C3H
4
8
t50 < 9 s t90 < 17 s
t50 < 11 s t90 < 22 s Temperature range: -20 ºC – +40 ºC Interference: All hydrocarbons CxH
y
Lifetime:
– Warranted – Expected
2 years
5 years Test gases:
– Zero point – Sensitivity
Fresh air
100 % vol.
7.5.1.3 Carbon dioxide CO2 for warning ExTox
Type: Infrared sensor Measuring range:
– Lower limit
Measuring error: ±0.04 % vol. (long-term stability)
Zero point deviation: 0.04 % vol. Response time: t90 < 20 s Decay time: t10 < 14 s Temperature range: -20 ºC – +40 ºC Interference: None Lifetime:
– Warranted – Expected
Test gases:
– Zero point – Sensitivity
0 – 5 % vol.
0.02 % vol.
As per /4/
2 years
5 years
Fresh air
2.00 % vol. CO
2
80
Page 89
7.5.1.4 Carbon dioxide CO2 for measuring in bar holes
Type: Infrared sensor Measuring range: 0 – 30 % vol. Measuring error: ±1.04 % vol. Response time: t90 < 20 s Temperature range: -20 ºC – +40 ºC Interference: None Lifetime:
– Warranted – Expected
2 years 5 years
Test gases:
– Zero point – Sensitivity
Fresh air 20 % vol. CO
2

7.5.2 Electrochemical sensors (EC)

7.5.2.1 Oxygen O2
Type: Electrochemical sensor Measuring range: 0 – 25 % vol. Resolution: 0.1 % vol. Measuring error: ±3 % / ±0.3 % vol. (±3 digits) Response time: t90 < 15 s Drift: < 2 % within 3 months Temperature range: -20 ºC – +40 ºC Interference: None Lifetime:
– Warranted – Expected
Test gases:
– Zero point – Sensitivity
2 years 3 years
100 % vol. CH4 or 100 % vol. N
Fresh air (20.9 % vol.)
7 Appendix
2
81
Page 90
7 Appendix
7.5.2.2 Carbon monoxide CO
Type: Electrochemical sensor Measuring range:
– Lower limit
Resolution: 1 ppm Measuring error: ±3 % / ±3 ppm (±3 digits)
Zero point deviation: 7 ppm Response time: t90 < 30 s Decay time: t10 < 24 s Drift: < 10 % within 6 months Temperature range: -20 ºC – +40 ºC Interference at 20 ºC.
– 3000 ppm H – 100 ppm NO
Lifetime:
– Warranted – Expected
Test gases:
– Zero point – Sensitivity
2
0 – 500 ppm
4 ppm
±5 ppm (long-term stability) as per /4/
Approx. 1000 ppm CO
Approx. 25 ppm CO
24 months
36 months
Fresh air
40 ppm CO
82
Page 91
7.5.2.3 Hydrogen sulphide H2S
Type: Electrochemical sensor Measuring range:
– Lower limit
Resolution: 1 ppm Measuring error: ±3 % / ±3 ppm (±3 digits)
Zero point deviation: 1 ppm Response time: t90 < 30 s Decay time: t10 < 27 s Drift: < 10 % within 6 months Temperature range: -20 ºC – +40 ºC Alarm thresholds
(factory settings):
Interference at 20 ºC.
– 100 ppm CO – 1 % vol. H – 100 ppm NO
Lifetime:
– Warranted – Expected
Test gases:
– Zero point – Sensitivity
2
2
7 Appendix
0 – 100 ppm 1 ppm
±2 ppm (long-term stability) as per /4/
AL1: 10 ppm AL2: 20 ppm AL3: 100 ppm
Approx. 1 ppm H2S Approx. 10 ppm H2S Approx. 3 ppm H2S
2 years > 3 years
Fresh air 40 ppm H2S

7.5.3 Gas-sensitive semiconductor

Methane CH4, propane C3H
Type: Gas-sensitive semiconductor Measuring range: 0 – 1 % vol. Resolution: 1 ppm / 2 ppm / 20 ppm / 200 ppm Measuring error: ±30% Alarm thresholds
(factory settings):
Interference at 20 ºC. All hydrocarbons CxH Lifetime:
– Warranted – Expected
Test gases:
– Zero point – Sensitivity
8
3 ppm
1 year 5 years
Fresh air 10 ppm / 100 ppm / 1000 ppm / 1.0 % vol
y
83
Page 92
7 Appendix

7.6 Technical information

7.6.1 Identication sticker (back of device)
The symbols on the sticker mean the following:
Only ever open the battery compartment outside of explosive areas.
Read the operating instructions.

7.6.2 Cleaning

The device must only be cleaned with a damp cloth.
NOTICE! Possible damage to property from unsuita-
A
ble cleaning agents
Unsuitable cleaning agents can chemically corrode the housing surface. Fumes from solvents and substances containing silicone can get into the device and damage the sensors.
● Never use solvents, petrol, cockpit sprays containing
silicone or similar substances to clean the device.

7.6.3 Electrostatic charge

Avoid electrostatically charging the device. Electrostatically un­earthed objects (e.g. including metallic housing without an earth
connection) are not protected against applied charges (e.g. through dust or dispersed ows).
DANGER! Risk of explosion from sparks
A
84
When working with hydrogen, electrostatic charging can occur.
● When working with hydrogen, always use the TG8 car-
rying bag.
Page 93

7.7 Accessories and consumables

Accessories
Part Order number
Docking station TG8 LP11-10001 AC/DC adapter M4 LD10-10001 Vehicle cable M4, 12 V= portable ZL07-10100 Vehicle cable M4, 12 V= installed ZL07-10000 Vehicle cable M4, 24 V= portable ZL09-10000 "Vario" carrying system 3209-0012 Carrying bag TG8 3204-0040 Case TG8-RÜ ZD29-10000 Carpet probe PRO ZS01-12000 Bell probe D80 ZS05-10500 Localisation probe 345 mm ZS03-10300 Flexible hand probe ZS32-10000 Floating probe ZS21-10100 Probe hose ZS25-10000 (e.g.) Test set SPE VOL PP01-90101 Test set SPE DUO PP01-60001 Test case kit PPM ZP03-12001 Test plate ZP06-10000
7 Appendix
Consumables
Part Order number
Fine dust lter 2499-0020 Hydrophobic lter 2491-0050 Carbon dioxide lter ZG02-11000
Hose lter 2499-0010 Special lter element 2499-0005
Rechargeable NiMH battery 1354-0009 Disposable alkaline battery 1353-0001 Test gas ExTox IR, test gas can 1 l, pressure
approx. 12 bar Test gas 10 ppm CH4 in synthetic air, test gas
can 1 l, pressure approx. 12 bar
ZT47-10000
ZT24-10000
Other accessories and consumables are available for the prod­uct. Please contact our SEWERIN sales department for further information.
85
Page 94
7 Appendix

7.8 Declaration of conformity

Hermann Sewerin GmbH hereby declares that the EX-TEC® HS 680/660/650/610 system fulls the requirements of the fol-
lowing guidelines:
● 2014/34/EU
● 2014/30/EU
Gütersloh, 2016-04-20
Dr S. Sewerin (CEO)
The complete declaration of conformity can be found online.
86
Page 95

7.9 Inspection protocols

- 1 -
INSPECTION PROTOCOL EX-TEC® HS 680
Manuf. no. (e.g.: 064 01 0501)
1.0 General status
2.0 Pump check
3.0 Inspection above ground
3.2 Test gas 10 ppm CH
4
4.0 Structure
4.2 Test gas 1.00 % vol. CH
4
5.0 Plants
5.2 Test gas 2.20 % vol. CH
4
6.0 Warning %LEL (work area monitoring)
6.2 Test gas 50 % LE L ≙ 2.20 % vol. CH
4
7.0 Warning ExTox
7.2 Test gas 2.20 % vol. CH
4
7.3 Test gas 2.00 % vol. CO
2

7.9.1 Test with individual gases

1.1 – Perfect condition (e.g.: Y / N)
1.2 – Fine dust filter correct (e.g.: Y / N)
1.3 – Disposable/rechargeable battery capacity (e.g.: ¼)
2.1 – Pump error F100 in seal
3.1 Zero point – Display with fresh air
– Display ≥ 10 ppm in 10 seconds
4.1 Zero point – Display with fresh air
– Display 0.80 – 1.20 % vol.
5.1 Zero point – Display with fresh air
– Display 2.00 – 2.40 % vol.
7 Appendix
09.04.2019
6.1 Zero point – Display -3 – +3 % LEL or – Display -0.15 – +0.15 % vol.
– Display 45 – 55 % LEL or – Display 2.00 – 2.40 % vol.
6.3 Visual alarm (e.g.: Y / N)
6.4 Audible alarm (e.g.: Y / N)
7.1 Zero point – Display -0.15 – +0.15 % vol.
– Display 2.00 – 2.40 % vol.
– Display 1.80 – 2.20 % vol.
7.4 Visual alarm (e.g.: Y / N)
7.5 Audible alarm (e.g.: Y / N)
87
Page 96
7 Appendix
8.0 Gas measuring (absence of g as)
8.2 Test gas 100 % v ol. CH
4
9.0 Measuring in bar holes
9.2 Test gas 100 % v ol. CH
4
9.3 Test gas 20.0 % vol. CO
2
– Display 18.0 – 22.0 % vol.
10.0 Further gases (optional)
10.1 Oxygen O
2
Zero point (test gas 100 % vol. CH4)
10.3 Hydrogen sulphide H2S
11.0 Ethane analysis (optional)
11.1 Test gas 50 ppm C2H6 in synth. air
– CH4: No, C2H6: Yes, C3H8: No
11.2 Test gas 100 ppm C2H6, 1 % vol. CH
4
– CH4: Yes, C2H6: Yes, C3H8: No
12.0 Comments
– or similar
13.0 Inspection
8.1 Zero point
9.1 Zero point
10.2 Carbon monoxide CO
– Display -0.3 – +0.3 % vol.
– Display 98 – 102 % vol.
– Display -0.3 – +0.3 % vol.
– Display 98 – 102 % vol.
– Display -0.5 – +0.5 % vol. Test gas 17.5 % vol. – Display 17.0 – 18.0 % vol.
Test gas fresh air (20.9 % vol.)
– Display 20.4 – 21.4 % vol.
Zero point fresh air – Display -3 – +3 ppm Test gas 40 ppm – Display 37 – 43 ppm
Zero point fresh air – Display -3 – +3 ppm Test gas 20 ppm – Display 17 – 23 ppm Test gas 40 ppm – Display 37 – 43 ppm
88
– Housing damaged – Adjustment, repair – Inspection at factory
– Day – Month – Year – Signature
- 2 -
Page 97

7.9.2 Test with gas mixture

3.2
Test gas 10 ppm CH
4
4.2
Test gas 1.00 % vol. CH
4
5.1
Zero point CH
4
5.2
Zero point CO
2
(0.04 % vol.)
5.3
Fresh air O
2
(20.9 % vol.)
5.5
Zero point H
2
S
INSPECTION PROTOCOL ExTox IR EX-TEC® HS 680
Manuf. no. (e.g.: 064 01 0501)
1.0 General Statu s
1.1 - Perfect condition (e.g.: Y / N)
1.2 - Fine dust filter correct (e.g.: Y / N)
1.3 - Disposable/rechargeable battery capacity (e.g.: ¼)
2.0 Pump check
2.1 - Pump err or F100 in seal
3.0 Inspection above ground
3.1 Zero point
- Display with fresh air
- Display ≥ 10 ppm in 10 seconds
4.0 Structu re/Plants
4.1 Zero point
- Display with fresh air
– Display 0.80 – 1.20 % vol.
5.0 Warning %LEL / Warning ExTox (test gas fresh air)
– Display -3 – +3 % LEL or – Display -0.15 – +0.15 % vol.
– Display -0.02 – +0.10 % vol.
– Display 20.4 – 21.4 % vol.
5.4 Zero point CO
– Display -3 – +3 ppm
– Display -3 – +3 ppm
7 Appendix
09.04.2019
- 1 -
89
Page 98
7 Appendix
6.0 Warning %LEL / Warning ExTox (test gas ExTox IR)
6.1
CH
4
(2.20 % vol.)
6.2
CO
2
(2.00 % vol.)
6.3
O
2
(0 % vol.)
6.5
H
2
S (40 ppm)
7.1
Zero point CH
4
/ CO
2
7.2
Test gas 60 % vol. CH
4
7.3
Test gas 20.0 % vol. CO
2
Test gas 100 ppm C2H6, 1 % vol. CH
4
– CH4: Yes, C2H6: Yes, C3H8: No
6.4 CO (40 ppm)
6.6 Visual alarm (e.g.: Y / N)
6.7 Audible alarm (e.g.: Y / N)
7.0 Bar holes/measu ring
8.0 Ethane analysis
– Display 45 – 55 % LEL or – Display 2.00 – 2.40 % vol.
– Display 1.80 – 2.20 % vol.
– Display -0.5 – +0.5 % vol.
– Display 37 – 43 ppm
– Display 37 – 43 ppm
– Display -0.3 – +0.3 % vol.
– Display 98 – 102 % vol.
– Display 18.0 – 22.0 % vol.
9.0 Comments
– Housing damaged – Adjustment, repair – Inspection at factory – or similar
10.0 Inspection
– Day – Month – Year – Signature
- 2 -
90
Page 99

7.10 Advice on disposal

The European Waste Catalogue (EWC) governs the disposal of
appliances and accessories.
Description of waste Allocated EWC waste code
Device 16 02 13
Test gas can 16 05 05
7 Appendix
Disposable battery, re-
16 06 05
chargeable battery
End-of-life equipment
Used equipment can be returned to Hermann Sewerin GmbH. We will arrange for the equipment to be disposed of appropriately
by certied specialist contractors free of charge.
91
Page 100
7 Appendix

7.11 Terminology and abbreviations

AL ● Alarm CENELEC ● European Committee for Electrotechnical
Standardization
EC ● Electrochemical sensor Gas type ● Hydrocarbon CxHy, which can be meas-
ured with the IR
● One of the available gas types must al-
ways be set at a given time, as it is not possible to measure more than one gas type at the same time.
IR ● Infrared sensor LEL ● Lower Explosion Limit LTEL ● Long time exposure limit NiMH ● Nickel metal hydride OEL ● Occupational exposure limit ppm ● Parts per million Ring memory ● Type of data storage in the device
● If the available storage space is full, the oldest le is automatically overwritten by the current le.
SC ● Gas-sensitive semiconductor Stack memory ● Type of data storage in the device
● If the available storage space is full, you are prompted to conrm whether the oldest le should be overwritten by the current le.
STEL ● Short time exposure limit % vol. ● Percentage of a gas in a gas mixture
based on the volume
92
Loading...
Buy Points How it Works FAQ Contact Us Questions and Suggestions Privacy Policy Cookie Policy Terms of Use