Aircom Vg series User manual

MASS FLOW METER

SerieS VG

Manual

2 3

1. Introduction 3

1.10 Features of mass ﬂow meter series VG 3

1.11 Instructions and warnings 3

1.12 The measurement principle 3

1.13 Real, Standardized and Normalized ﬂow 4

1.14 CMOS technology 5

1.15 Block diagram 5

2. General device speciﬁcations 6

2.10 Safety 7

2.11 Electrical data for series VG 7

2.12 Battery 7

2.13 Optionale Module 7

2.14 Operation with other gases 8

2.15 Pressure loss 8

2.16 Temperature compensation 9

2.17 Pressure compensation 9

2.18 Response time 9

2.19 Filter settings 9

3. Installation and commissioning 10

3.10 Mounting position and mounting location 10

3.11 Requirements for pipework 10

3.12 Fittings and ﬁlters 10

3.13 Filters / Gas cleanliness 11

3.14 Electrical power supply 11

3.15 How to replace the battery 11

3.16 Warm-up time 11

4. Operating 12

In case of improper operation, the measurement or control function of the device

may be impaired or even completely fail.

4.10 Introduction 12

4.11 Main Menu 14

4.12 Settings 19

5. Maintenance 23

5.10 Cleaning 23

5.11 Returns 23

6. Appendix 24

6.10 Troubleshooting 24

6.11 Dimensional drawings ¼“ in mm 25

6.12 Dimensional drawings ¼“ in Zoll 25

6.13 Dimensional drawings ½“ in mm 26

6.14 Dimensional drawings ½“ in Zoll 26

6.15 Wetted parts series VG 27

6.16 Overview Default settings 28

7. Overview menu VG mass ﬂow meter 30

TABLE OF CONTENTS

This symbol alerts the user to important operating, maintenance and servicen information.

IMPORTANT INSTRUCTIONS

• Do not remove the electronics housing. A damaged hologram seal will void the warranty.

• There are no serviceable parts inside the unit.

• Repairs must only be performed by qualiﬁed personnel

ATTENTION

This unit has several power supply possibilities. If you use the external 24 Vdc power supply, it is strongly recommended

to have this device grounded.

SUBJECT TO CHANGE

Due to our policy of ongoing product development, we reserve the right to change the information in this manual without

notice.

RECYCLING

Note the existing regulations of your country.

TOXIC, FLAMMABLE GASES AND ATEX

In the case of toxic and ﬂammable gases, the respective safety guidelines in each country must be followed. This VG-device

is NOT Ex certiﬁed. In the case of ﬂammable and toxic gases, ﬁttings, cable glands and pipes intended for that purpose

must be used. The responsibility for safe operation lies with the user and designer of the facilities.

OXYGEN SERVICE

AirCom Pneumatic GmbH is not liable for any damage or personal injury, whatsoever, resulting from the use of our

standard mass ﬂow meters or controllers for oxygen gas. You are responsible for determining if this mass ﬂow meter or

controller is appropriate for your oxygen application. You are responsible for cleaning the mass ﬂow meter or controller

to the degree required for your oxygen ﬂow application.

RECEIPT OF YOUR INSTRUMENT

When receiving the instrument, carefully check the outside packing carton for damage that may have incurred during

shipment. If the carton is damaged, notify the local carrier and submit a report to the factory or distributor. Remove

the packing slip and check that all ordered components are present and match your speciﬁcations (as ordered). Make

sure any spare parts or accessories are not discarded with the packing material. Do not return any equipment to the

factory without ﬁrst contacting AirCom Pneumatic GmbH.

INSTALLATION

Please note before the start-up:

• Do not use sealing tape or liquid sealant

• Piping must be cleaned before installation of instrument.

Products in this manual may contain metal or elastomer seals, gaskets, o-rings or valve seats. It is the “user’s” responsibility

to select materials that are compatible with their process and process conditions. Using materials that are not compatible

with the process limitations of the device, may result in equipment damage and/or personnel injury or death. It is recommen-

ded that the user check the devices on a regular schedule to ensure that it is leak free as both metal and elastomer seals,

gaskets, o-rings and valve seats may change with age and exposure to process gas..

POWER

If it becomes necessary to remove the instrument from the system or change a battery, the power to the device must

be disconnected. Always switch off the power before you disconnect terminal connections in potentially dangerous

surroundings to avoid sparks.

4 5

1. INTRODUCTION

Thank you for choosing devices from the VG series. These operating instructions will help you to install

and operate the measuring devices. Please read through these instructions carefully before installing the

devices. Our aim has been to write a full and practical guide. We would be grateful if you would notify us of

any shortcomings or mistakes. Please contact your sales partner if you have questions about any aspect of

the products.

1.10 FEATURES OF VG MASS FLOW METERS

In developing and manufacturing the devices, we have focused primarily on customers and their applica-

tions. Our aim is to implement customers' requirements in the form of new developments or enhancements

on an ongoing basis. The essential features are:

• Compact design

• Dot-matrix LCD touch screen

• Multiple gases possible (3 gases)

• Flexible due to the many different settings accessible through the touch screen

• Back-light screen in USB and 12…30 Vdc power mode

• Power also possible with USB micro-B connector

• Optional alarm module with power, 3 contacts and 2 inputs

• Display can be rotated 180 degrees

• Fast and accurate measurement and control

• Integrated temperature compensation and ﬂow totalizer (standard)

1.11 INSTRUCTIONS AND WARNINGS

Read all of the operating instructions thoroughly before installing and commissioning equipment. Miscon-

ceptions and incorrect use can lead to breakage of the measuring device or risk of personal injury. Should

one of these cases occur, the responsibility lies solely with the operator of the device. The installation, com-

missioning and operation and maintenance must be done by appropriately qualiﬁed personnel.

1.12 THE MEASUREMENT PRINCIPLE

The thermal mass ﬂow measurement principle is particularly suitable for the measurement and control of

clean and dry gaseous media. The most signiﬁcant advantage is that the measurement process measures

the real mass ﬂow and is largely independent of temperature and pressure. Stated simply, the thermal mea-

surement principle measures the heat transport by gas ﬂowing past. In the case of VG mass ﬂow measuring

instruments, a constant heat input gives a ﬂow-dependent temperature difference (ΔT). Two temperature

sensors are positioned in the measuring channel (T1, T2), one before the heating system (H) and one

after it.

1.13 REAL, STANDARDIZED AND NORMALIZED FLOW

The user-selectable engineering units of the red-y compact has been divided in two groups: “Real and Nor-

mal” units and “Other units”

This separation is not only there to ﬁnd the unit you want to select quicker, it also separated the “Norma-

lized ﬂow” from the “Standardized ﬂow”

If there is no ﬂow, the heat spreads symmetrically in directions T1 and T2. The temperature difference T1-T2

is therefore zero. Flow rates > 0 create a temperature difference.

The sensor T1 at the inlet is cooled by the gas ﬂowing past it, and the temperature of the second sensor T2

rises due to the heat drawn from the heating system. The temperature difference is related non-lineary to

the mass ﬂow, with very high repeatability. The electronics will, based on the calibration, convert this tem-

perature difference in a linear and proportional indication of the mass ﬂow of the gas.

The redy compact has basically 2 reference conditions: One for “Real and Normal” units and one for “Other

units”

The factory setting is as follows:

1) For all units that are used in "normal" (like ln/min), the reference conditions are always 0°C and 1013.25

mbara. This cannot be adapted.

2) For all the other units that are “standard” (like ls/min and sccm) and the l/min the reference

conditions has to be be deﬁned when the unit is ordered. The reference value for all units that are not “Nor-

mal” or “Real” it has to be deﬁned with the purchase order. It cannot be changed after the units has been

delivered. On the sticker of the red-y compact we will mention a reference condition. This reference condi-

tion is for the “Standard” units only. The “normal” units will always be 0°C and 1013.25 mbara.

In future version of the ﬁrmware the reference conditions will be adjustable in the menu.

VG Mass Flow Meter

Dok-Nr.: BA-VG Page 3 of 32

Version 1.0

1. Introduction

Thank you for choosing devices from the VG series. These operating instructions will help you to install and operate the

measuring devices. Please read through these instructions carefully before installing the devices. Our aim has been to write

a full and practical guide. We would be grateful if you would notify us of any shortcomings or mistakes.

Please contact your sales partner if you have questions about any aspect of the products.

1.10 Features of VG mass flow meters

In developing and manufacturing the devices, we have focused primarily on customers and their applications. Our aim is to

implement customers' requirements in the form of new developments or enhancements on an ongoing basis. The essential

features are:

• Compact design

• Dot-matrix LCD touch screen

• Multiple gases possible (3 gases)

• Flexible due to the many different settings accessible through the touch screen

• Back-light screen in USB and 12…30 Vdc power mode

• Power also possible with USB micro-B connector

• Optional alarm module with power, 3 contacts and 2 inputs

• Display can be rotated 180 degrees

• Fast and accurate measurement and control

• Integrated temperature compensation and flow totalizer (standard)

1.11 Instructions and warnings

Read all of the operating instructions thoroughly before installing and commissioning equipment. Misconceptions and

incorrect use can lead to breakage of the measuring device or risk of personal injury. Should one of these cases occur, the

responsibility lies solely with the operator of the device. The installation, commissioning and operation and maintenance

must be done by appropriately qualified personnel.

The thermal mass flow measurement principle is particularly suitable for the measurement and control of clean and dry

gaseous media. The most significant advantage is that the measurement process measures the real mass flow and is largely

independent of temperature and pressure.

Stated simply, the thermal measurement principle measures the heat transport by gas flowing past.

In the case of VG mass flow measuring instruments, a constant heat input gives a flow-dependent temperature difference

(ΔT). Two temperature sensors are positioned in the measuring channel (T1, T2), one before the heating system (H) and one

after it.

1.12 The measurement principle

If there is no flow, the heat spreads symmetrically in directions T1 and T2. The temperature difference T1-T2 is therefore

zero.

Flow rates > 0 create a temperature difference.

The sensor T1 at the inlet is cooled by the gas flowing past it, and the temperature of the second sensor T2 rises due to the

heat drawn from the heating system.

The temperature difference is related non-lineary to the mass flow, with very high repeatability. The electronics will, based

on the calibration, convert this temperature difference in a linear and proportional indication of the mass flow of the gas.

Dok-Nr.: BA-VG Page 4 of 32

Version 1.0

1.13 Real, Standardized and Normalized flow

The user-selectable engineering units of the red-y compact has been divided in two groups: “Real and Normal” units and

“Other units”

This separation is not only there to find the unit you want to select quicker, it also separated the “Normalized flow” from

the “Standardized flow”

The red-y compact has basically 2 reference conditions: One for “Real and Normal” units and one for “Other units”

The factory setting is as follows:

1) For all units that are used in "normal" (like ln/min), the reference conditions are always 0°C and 1013.25 mbara. This

cannot be adapted.

2) For all the other units that are “standard” (like ls/min and sccm) and the l/min the reference

conditions has to be be defined when the unit is ordered.

The reference value for all units that are not “Normal” or “Real” it has to be defined with the purchase order. It cannot be

changed after the units has been delivered.

On the sticker of the red-y compact we will mention a reference condition. This reference condition is for the “Standard”

units only. The “normal” units will always be 0°C and 1013.25 mbara.

In future version of the firmware the reference conditions will be adjustable in the menu.

VG Mass Flow Meter

6 7

2. GENERAL DEVICE SPECIFICATIONS

Media (real gas calibration): Air, O2*, N2*, He, Ar, CO2, H2, CH4, C3H8

(other gases and gas mixtures on request) *O2 & N2 are calibrated with air.

Accuracy:

Eco ±2.0% of full scale; Ranges > 200 ln/min ±3.0% of full scale

Special ±1.0% of full scale (only G¼” instruments and real gas calibrations)

Dynamics:

Eco 1:50 (Meter reads zero if ﬂow is less than 1.7% of full scale)

Special Special: 1:100 (Meter reads zero if ﬂow is less than 0.83% of full scale)

Response time: Maximum 300 msec (ﬁlter setting dependend)

Flow update by sensor 40 ms (Battery mode 500 ms)

Display update 240 ms (Battery mode 500 ms)

Repeatability: ±0.5% of full scale

Long-term stability: < 1% of reading / year

Temperature coefﬁcient: < 0.025% FS measuring range type per °C

< 0.012% FS measuring range type per 1°F

Pressure coefﬁcient: < 0.2% / bar of reading (typical N2)

< 0.014% / psi of reading (typical N2)

Working pressure range: 0.2 - 11 bara (3-160 psia)

Test pressure: 16 bara (232 psia)

Storage conditions: -20 to 80°C (-4 to 176°F), 0-95% RH, non-condensing

Temperature range: 0 – 50°C (32 bis 122°F), 0-95%, RH, non-condensing

Do not expose device to direct sun light.

Warm-up time: < 5 sec. for full accuracy

Materials

Electronics housing: ABS (Acrylnitril-Butadien-Styrol)

Body Material: Anodized aluminium or stainless steel 1.4404 (316L)

Sensor area: Silicon, glass, epoxy

Seal material: FKM, optional EPDM (FDA compatable)

Wetted parts: See appendix (see chapter 6.17 Wetted Parts List)

Integration

Display: Touch display 128x64 px

Backlighted only with external power supply (Micro-USB or 24 Vdc)

Process connection:

G¼" (BSPP* female) up to 60 ln/min,

G½" (BSPP* female) up to 450 ln/min

*British Standard Pipe Parallel

Inlet section: None required

Mounting orientation: Any position (consult manufacturer above 5 bara (72 Psia) if the

compact will be mounted vertical)

Connection cable: For external power supply: 2 m with loose ends (ﬂy leads)

1.14 CMOS TECHNOLOGY

The VG measuring and control devices are equipped with an innovative CMOS semiconductor sensor that

sets new standards for accuracy, speed and measurement dynamics.

With our CMOS technology the sensor element, ampliﬁer and A/D converter form a single silicon chip.

1.15 BLOCK DIAGRAM

The following GCM block diagram shows the structure of the device. The block diagram does not show the

optional manual control/needle valve (Model VGR) that would normally be placed on the outlet of the unit.

Dok-Nr.: BA-VG Page 5 of 32

Version 1.0

1.14 CMOS technology

The VG measuring and control devices are equipped with an innovative CMOS semiconductor sensor that sets new stan-

dards for accuracy, speed and measurement dynamics.

With our CMOS technology the sensor element, amplifier and A/D converter form a single silicon chip.

1.15 Block diagram

The following GCM block diagram shows the structure of the device. The block diagram does not show the optional manu-

al control/needle valve (Model VGR) that would normally be placed on the outlet of the unit.

VG Mass Flow Meter

8 9

2.10 SAFETY

2.11 ELECTRICAL DATA

Supply voltage:

Power supply VG meter & regulator Standard AA battery

Option: External power 8...30 Vdc, 120 mA. We recommend a power supply with a minimum current of 150

mA.

2.12 BATTERY

The battery operated compact 2 can operate on any common AA battery. The lifetime is strongly depen-

dent on the usage and the quality of the battery. In general we can state that the battery lasts for about 3-6

months under non-continuous use. (see Note 1+2)

We recommend to use external power (USB micro-B or 24 Vdc) if you application needs continuous measu-

rement like measuring totalized ﬂ ow. To extend the lifetime of the battery, the back-light is disabled during

battery operation, you cannot activate it. We strongly recommend to use the “auto power off” in the menu

for battery driven devices (see chapter 4.12.7 Battery auto off)

More information on the battery in chapter 3.14 Electrical power supply and 3.15 How to replace the battery?.

Note 1: When we supply the unit, the “auto power off” will be set to 15 minutes

Note 2: The unit can be set to performance mode when powered from the battery, this will strongly increase

the battery usage. See chapter 4.12.1 Measurement for more information.

2.13 OPTIONAL MODULES

As an additional option you can purchase a power supply or an alarm module. The power supply module, is

provided with a voltage from 8 to 30 Vdc, will power the unit. The unit comes with a 2 meter cable.

The alarm module can in addition to the above power mo-

dule, provide 3 customer individually settable alarms and 2

inputs. The module is supplied with a 2 meter ﬂy-lead cable.

Each of the 3 alarm contacts can be conﬁgured as high, low,

window and totalizer alarm. Once the alarm becomes acti-

ve, the 3 potential free alarm contacts can be reset in many

different ways. Automatic, through the touch screen or with

one of the 2 input signals. Other options like hysteresis set-

tings and delays are also available.

For detailed information see 4.11.2 Alarm Menu in this manual.

Both the power and the alarm module are mounted

similar to the battery module (see 3.15 How to repla-

ce the battery). They replace the battery module, so

you cannot use these modules in combination with

battery power.

An external magnet can unintentionally inﬂuence the

alarm contacts.

Test Pressure 16 Bara (232 psia)

Leak rate to external: 1 x 10-6 mbar*l/s He

Protection class: IP-50

EMC EN61326-1

VG Massendurchflussgeräte

Dok-Nr.: BA-VG Seite 7 von 32

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2.10 Sicherheit

Prüfdruck 16 Bara (232 psia)

Leckrate nach aussen 1 x 10-6 mbar*l/s He

Schutzklasse IP-50

EMV (EMC) EN61326-1

2.11 Elektrische Daten

Speisespannung

Speisung Messer & Regler mit Standard AA-Batterie (Lebansdauer hängt von der Einsatzzeit ab)

Option: Externe Speisung 24Vdc (8...30 Vdc), 120mA

Wir empfehlen die Versorgung mit 150mA vorzusehen

2.12 Batterie

Der batteriebetriebene Durchflussmesser wird mit einer handelsüblichen Standard-AA-Batterie gespiesen. Die Lebensdauer

ist stark abhängig von der Einsatzdauer. Im Allgemeinen kann man eine Lebensdauer von 3-6 Monaten bei nicht dauerndem

Betrieb erwarten. (siehe dazu Anmerkung 1+2).

Bei dauerhafter Durchfluss- und/oder Verbrauchsmessung empfehlen wir die externe Speisung (24Vdc oder USB) zu ver-

wenden. Die hinterleuchtete Anzeige ist nur bei der externen Speisung möglich.

Im Batteriebetrieb empfehlen wir, das Messgerät so einzustellen, dass es nach einer gewissen (einstellbaren) Zeit automa-

tisch abschaltet. (Siehe Kapitel 4.12.7 Bat auto off).

Weitere Informationen zum Batteriebetrieb ﬁnden Sie in Kapitel 3.14 Elektrischer Anschluss und 3.15 Austausch der Bat-

terie.

Anmerkung 1: Im Auslieferzustand ist „Bat Auto off“ auf 15 Minuten eingestellt. Wenn Sie eine längere Messung durchführen

wollen, so müssen Sie diese Einstellung entsprechend anpassen.

Anmerkung 2: Das Instrument kann im Bateriebetrieb über das Menü auf „Performance Mode“ eingestellt werden, was die

Lebensdauer der Batterie erheblich reduziert. Für weitere Informationen siehe Kapitel 4.12.1 Messung.

2.13 Optionale Module

Als Option kann der Durchflussmesser auch mit einem Fremdspeisemodul oder einem Alarm-Modul ausgestattet werden.

Das Fremdspeisemodul braucht eine Speisespannung zwischen 8 und 30Vdc. Ein 2-metriges Kabel mit losen Enden ist

am Gerät vormontiert. Die Montage/Demontage ist identisch wie jene für das Batteriemodul (Siehe Kapitel 3.15 Austausch

der Batterie)

Das Alarm-Modul bietet zusätzlich zum vorgenannten Fremdspeisemodul 3 vom Anwender individuell programmierbare

Alarme sowie 2 Eingänge. Das Modul wird ebenfalls anschlussbereit mit einem 2-metrigen Kabel mit losten Enden geliefer

2.14 OPERATION WITH OTHER GASES

Each measuring device can store data for up to 3 types of gas or operational states that need to be deﬁned

at the time of purchase.

Note:

Please note that, among other effects, the zero-point error (offset display) will be higher if the device

is not operated with the type of gas, for which it had been calibrated. A difference in zero indication

is also possible if the

2.15 PRESSURE LOSS

Our thermal mass ﬂow meters have a low pressure drop. The pressure drop depends mainly on the medi-

um, the pressure conditions and the ﬂow rate. Please note that the size of the pipes has a large effect on the

pressure loss. For example from around 60 ln/min, we recommend a pipe inside diameter of at least 10 mm.

Please also note that some ﬁ ttings have a reduced diameter and can cause considerable pressure drop in

your system. Be especially careful with vacuum applications, please select a relative big pipe diameter).

Power input:

Voltage supply range : 8… 30 Vdc (Power supply hereafter refered to as the 24 Vdc power supply)

Max. current : 300 mA

Protection input: Polyfuse (trip current > 500mA) and reverse polarity protected

Switch ratings switch 1 + 2 (SPST hard contact):

Maximum current 0.5 A

Maximum voltage 30 Vdc

Relais lifetime > 5 Mio.

Switch ratings switch 3 (DPST contact):

Maximum current 0.5 A

Maximum voltage 30 Vdc

Relais lifetime > 5 Mio.

Inputs 1 + 2 (Opto-couplers):

Voltage range (polarity sensitive): 5 – 30 Vdc (@ 5mA max)

Min. recommended pulse width 100 msec (Sample interval: 20 msec)

Dok-Nr.: BA-VG Page 8 of 32

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2.14 Operation with other gases

The alarm module can in addition to the above power module, provide

3 customer individually settable alarms and 2 inputs. The module is

supplied with a 2 meter fly-lead cable.

An external magnet can unintentionally influence the alarm

contacts.

Power input:

Voltage supply range : 8… 30 Vdc (Power supply hereafter refered to as the 24 Vdc power supply)

Max. current : 300 mA

Protection input: Polyfuse (trip current > 500mA) and reverse polarity protected

Switch ratings switch 1 + 2 (SPST hard contact):

Maximum current 0.5 A

Maximum voltage 30 Vdc

Relais lifetime > 5 million

Switch ratings switch 3 (DPST contact):

Maximum current 0.5 A

Maximum voltage 30 Vdc

Relais lifetime > 5 million

Inputs 1 + 2 (Opto-couplers):

Voltage range (polarity sensitive): 5 – 30 Vdc (@ 5mA max)

Min. recommended pulse width 100 msec (Sample interval: 20 msec)

Generic specifications optional alarm module

Both the power and the alarm module are mounted similar

to the battery module (see 3.15 How to replace the battery).

They replace the battery module, so you cannot use these

modules in combination with battery power.

Each measuring device can store data for up to 3 types of gas or operational states that need to be defined at the time of

purchase.

Note:

Please note that, among other effects, the zero-point error (offset display) will be higher if the device is not ope-

rated with the type of gas, for which it had been calibrated. A difference in zero indication is also possible if the

2.15 Pressure loss

Our thermal mass flow meters have a low pressure drop. The pressure drop depends mainly on the medium, the pressure

conditions and the flow rate.

Please note that the size of the pipes has a large effect on the pressure loss. For example from around 60 ln/min, we

recommend a pipe inside diameter of at least 10 mm.

Please also note that some ﬁttings have a reduced diameter and can cause considerable pressure drop in your system.

Be especially careful with vacuum applications, please select a relative big pipe diameter).

Each of the 3 alarm contacts can be configured as high, low, window

and totalizer alarm. Once the alarm becomes active, the 3 potential

free alarm contacts can be reset in many different ways. Automatic,

through the touch screen or with one of the 2 input signals. Other

options like hysteresis settings and delays are also available.

For detailed information see 4.11.2 Alarm Menu in this manual.

VG Mass Flow Meter

Generic speciﬁcations optional alarm module

10 11

VG Massendurchflussgeräte

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3. Installation und Inbetriebnahme

3.10 Montageposition und Umgebungsbedingungen

Wir empfehlen, eine horizontale Einbaulage: stehend, seitlich liegend oder kopfüber. Bei einer vertikalen Einbaulage kann

sich je nach Gasart und bei Druck über 5 bar ein Nullpunkt-Offset einstellen. Dieser Effekt wird durch die Konvektion bei

ruhenden Medien verursacht. Beachten Sie im Weiteren die richtige Montage betreffend der Fliessrichtung (Pfeil auf

Gerätegehäuse).

Folgende Einbau-Situationen können zu Störungen führen:

• Starke Wärmequellen oder Umgebungstemperaturen ausserhalb der Spezifikation

• Elektromagnetisch stark abstrahlende Quellen wie Funkenentladungen

• Feuchte Umgebung führt zu Kondensationsschäden an elektronischen Bauteilen

• Vorsicht bei kalten Gasen und hoher Luftfeuchtigkeit. Wenn sich auf der Platine Kondensat bildet, kann das Messge-

rät beschädigt werden.

• Starke Vibrationen sind zu vermeiden.

• Aggressive Umgebung verringert die Lebensdauer im Allgemeinen.

• Zurückfliessende Flüssigkeit kann in das Messgerät eindringen. Ein erhöhter Montageort oder Rückschlagventile hel-

fen meist.

Beachten Sie bei der Montage die Durchflussrichtung des Mediums. Diese

ist mit einem Pfeil auf der Rückseite des Gerätegehäuses gekennzeichnet.

3.11 Anforderungen an die Rohrleitung

Bitte beachten Sie bereits bei der Planung der Rohrleitung folgende Punkte:

• Die Rohrleitungen müssen absolut sauber sein. Bitte spülen Sie diese vor der Montage der Messgeräte!

• Verwenden Sie geeignete Verbindungsleitungen (Druckfestigkeit, Beständigkeit)

• Auch bei festen Rohrverbindungen empfehlen wir die Montage der Geräte an den entsprechenden Befestigungsboh-

rungen

• Bitte berücksichtigen Sie ab etwa 60 l/min folgende Beruhigungsstrecken:

Einlauf: 10 x Durchmesser, Auslauf: 5 x Durchmesser

• Verwenden Sie geeignete Verschraubungen: Siehe Kapitel 3.12

• Unstabile Druckregler, oszillierende Pumpen und allgemein zu kleines Volumen vor und/oder nach dem Messgerät

führen zu Störungen. Installieren Sie ein Puffervolumen, welches auf den Durchfluss abgestimmt ist

• Die Dimension der Rohrleitung muss an das Mess-/ Regelgerät angepasst werden. Zu kleine Durchmesser führen zu

einem erhöhten Druckabfall. Ab 60 ln/min empfehlen wir eine Rohrleitung mit mindestens 10 mm Innendurchmesser

• Achten Sie auf mögliche Leckstellen vor der Inbetriebnahme der Geräte

• Wir empfehlen, für Wartungsarbeiten ein Bypass-System einzuplanen. Dies vor allem dort, wo kein Unterbruch der

Gaszuführung entstehen darf

Dichtmittel

Die Konstruktion der Geräte ermöglicht eine stirnseitige Abdichtung mit O-Ringen oder Flachdichtungen. Bitte vermeiden

Sie unbedingt:

• Gewindeabdichtungen mit Abdichtband (Teflonband). Rückstände die in das Gerät eindringen führen zu Fehlmes-

sungen und Funktionsstörungen des Regelventils. Ausserdem muss bei einer nötigen Überprüfung/Rekalibrierung ein

erhöhter Aufwand für die Reinigung in Rechnung gestellt werden.

• Bei Abdichtungen mit Flüssigdichtmittel können Ablagerungen in der Messstrecke die Funktion beeinträchtigen. Es

kommt eine erhöhte Reinigungspauschale für die Reinigung im Ultraschallbad hinzu.

3.12 Verschraubungen und Filter

Wir empfehlen stirnseitig mit O-Ring abdichtende Verschraubungen. Dicht-

mittel und Teflonband sind somit nicht nötig.Verschraubungen können einen

zusätzlichen Druckabfall verursachen. Bitte berücksichtigen Sie diesen

Umstand.

Beachten Sie, dass die Gewindetiefe im Gerät für die Verschraubungen im G¼”-Körper maximal 10mm und im G

½”-Körper maximal 13 mm beträgt. Zu lange Gewinde an den Verschraubungen können zu internen Beschädigun-

gen und Fehlfunktionen führen.

2.16 TEMPERATURE COMPENSATION

The thermal mass ﬂow meters measure the mass ﬂow of gases, the result being largely independent of

pressure and temperature. In addition to the fundamental principle an internal sensor measures the gas

temperature and, with the help of a 3-dimensional table of interpolation values, a correction factor is calcu-

lated automatically. The ﬂow indication is thus temperature-compensated.

2.17 PRESSURE COMPENSATION

During calibration, the speciﬁed operating pressure is taken into account. Changes to the pressure condi-

tions may introduce an additional error. This is around ±0.2% per bar. Please note that the control behavior

is inﬂuenced by substantially different pressure conditions. (relevant for units with an intergrated needle val-

ve only)

2.18 RESPONSE TIME

The response time is time required to display 98% of its ﬁnal value after a sudden change in ﬂow. This res-

ponse time for the compact 2 is around 300 ms but is dependent on your ﬁlter settings. On battery operati-

on you might experiencea slower response time than on external power. (See chapter 4.12.1 Measurement

for more information.)

2.19 FILTER SETTINGS

The ﬁlter settings smoothens the reading of pulsating or noisy ﬂows. It can be set through the set-up menu.

Higher ﬁlter settings will slow down the response time of the unit. (Please always ﬁrst try to ﬁnd and remove

the cause of your noisy or pulsating ﬂow e.g. add volume to your system). More information on the ﬁlter set-

tings in chapter 4.12.4 Filter

3. INSTALLATION AND COMMISSIONING

3.10 MOUNTING POSITION AND MOUNTING LOCATION

Although the recommend mounting position is horizontal, the unit can used be upright, vertical or

upside down. With a vertical mounting position, dependent on the type of gas and at pressures above

5 bara (72 psia, 500 kPa(abs)), a zero-point offset can be possible. This effect is caused by convection

in stationary media. With regard to mounting location, the following situations can cause problems:

• Strong heat sources, or ambient temperatures outside the speciﬁcation

• Strong sources of electromagnetic radiation such as spark discharges

• Humid environments and the associated condensation lead to damage of the electronic components

• In general, aggressive environments reduce the service life.

• Liquid running backwards can penetrate into the measuring instrument. An elevated mounting location

generally helps, or using check valves.

• If your ambient air contains high humidity and at night the temperature goes down, it is possible that

you will get some condensation inside the unit. Please take precautions to avoid this.

At installation make sure to respect the ﬂow direction of the gas. It is

indicated by an arrow on the back side of the instrument’s housing.

3.11 REQUIREMENTS FOR PIPEWORK

The most common causes of faults concern the way that devices are connected to the gas supply.

Please note the following points:

• The pipes must be absolutely clean. Please ﬂush them before installing the measuring instruments!

• Please ensure there are no pieces of thread sealant (f.i. Teﬂon tape) in the piping!

• Use appropriate pipe materials (pressure rating, durability) Even when connected to ﬁxed pipework, we

recommend that the devices are mounted using the appropriate mounting holes

• From 60 ln/min, we recommend the following ﬂow-calming sections of straight and unobstructed

straight tubing: Inlet: 10 x diameter; outlet: 5 x diameter

• Use appropriate ﬁttings (see chapter 3.12 Fittings and ﬁlters).

• Malfunctions can be caused by unstable pressure controllers, pumps that oscillate, and volumes before

and/or after the measuring device that are generally too small. Install an air reservoir with 2 liter volume

in the feed pipe (2 liter is an example, the volume depends on the application).

• The size of the pipe must be matched to the measuring/control device. A diameter that is too small re-

sults in an increased pressure drop.

• Check for any leaks before commissioning the devices.

• For maintenance work, we recommend that a bypass system is used. This is particularly important whe-

re the gas supply must not be interrupted.

SEALANTS

The design of the devices enables sealing at the ends with O-rings or ﬂat seals. It is essential that you avoid:

• the use of sealing tape to seal threads. Small pieces can cause incorrect measurements and control-

valve malfunctions. As well as that, if the device has to be checked or recalibrated, there will be an extra

charge for the additional cleaning work.

• sealing with liquid sealants will incur a higher cleaning charge for cleaning the device in an ultrasonic

tank.

3.12 FITTINGS AND FILTERS

You can order a wide range of process ﬁttings and adapters for the compact. Some compression ﬁttings

are available with an internal 50μ ﬁlter. Please refer to our website contact you local distributor for more de-

tails. Please also consider that ﬁttings and ﬁlters can create additional pressure drops over the

ﬂow meter.

Please note that the length of the tread on you ﬁtting that is screwed inside the

body is for the G¼˝ no longer than 10mm (3/8”) and for the G½˝ no longer than

13mm (½˝) to avoid internal damage.

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3. Installation und Inbetriebnahme

3.10 Montageposition und Umgebungsbedingungen

Wir empfehlen, eine horizontale Einbaulage: stehend, seitlich liegend oder kopfüber. Bei einer vertikalen Einbaulage kann

sich je nach Gasart und bei Druck über 5 bar ein Nullpunkt-Offset einstellen. Dieser Effekt wird durch die Konvektion bei

ruhenden Medien verursacht. Beachten Sie im Weiteren die richtige Montage betreffend der Fliessrichtung (Pfeil auf

Gerätegehäuse).

Folgende Einbau-Situationen können zu Störungen führen:

• Starke Wärmequellen oder Umgebungstemperaturen ausserhalb der Spezifikation

• Elektromagnetisch stark abstrahlende Quellen wie Funkenentladungen

• Feuchte Umgebung führt zu Kondensationsschäden an elektronischen Bauteilen

• Vorsicht bei kalten Gasen und hoher Luftfeuchtigkeit. Wenn sich auf der Platine Kondensat bildet, kann das Messge-

rät beschädigt werden.

• Starke Vibrationen sind zu vermeiden.

• Aggressive Umgebung verringert die Lebensdauer im Allgemeinen.

• Zurückfliessende Flüssigkeit kann in das Messgerät eindringen. Ein erhöhter Montageort oder Rückschlagventile hel-

fen meist.

Beachten Sie bei der Montage die Durchflussrichtung des Mediums. Diese

ist mit einem Pfeil auf der Rückseite des Gerätegehäuses gekennzeichnet.

3.11 Anforderungen an die Rohrleitung

Bitte beachten Sie bereits bei der Planung der Rohrleitung folgende Punkte:

• Die Rohrleitungen müssen absolut sauber sein. Bitte spülen Sie diese vor der Montage der Messgeräte!

• Verwenden Sie geeignete Verbindungsleitungen (Druckfestigkeit, Beständigkeit)

• Auch bei festen Rohrverbindungen empfehlen wir die Montage der Geräte an den entsprechenden Befestigungsboh-

rungen

• Bitte berücksichtigen Sie ab etwa 60 l/min folgende Beruhigungsstrecken:

Einlauf: 10 x Durchmesser, Auslauf: 5 x Durchmesser

• Verwenden Sie geeignete Verschraubungen: Siehe Kapitel 3.12

• Unstabile Druckregler, oszillierende Pumpen und allgemein zu kleines Volumen vor und/oder nach dem Messgerät

führen zu Störungen. Installieren Sie ein Puffervolumen, welches auf den Durchfluss abgestimmt ist

• Die Dimension der Rohrleitung muss an das Mess-/ Regelgerät angepasst werden. Zu kleine Durchmesser führen zu

einem erhöhten Druckabfall. Ab 60 ln/min empfehlen wir eine Rohrleitung mit mindestens 10 mm Innendurchmesser

• Achten Sie auf mögliche Leckstellen vor der Inbetriebnahme der Geräte

• Wir empfehlen, für Wartungsarbeiten ein Bypass-System einzuplanen. Dies vor allem dort, wo kein Unterbruch der

Gaszuführung entstehen darf

Dichtmittel

Die Konstruktion der Geräte ermöglicht eine stirnseitige Abdichtung mit O-Ringen oder Flachdichtungen. Bitte vermeiden

Sie unbedingt:

• Gewindeabdichtungen mit Abdichtband (Teflonband). Rückstände die in das Gerät eindringen führen zu Fehlmes-

sungen und Funktionsstörungen des Regelventils. Ausserdem muss bei einer nötigen Überprüfung/Rekalibrierung ein

erhöhter Aufwand für die Reinigung in Rechnung gestellt werden.

• Bei Abdichtungen mit Flüssigdichtmittel können Ablagerungen in der Messstrecke die Funktion beeinträchtigen. Es

kommt eine erhöhte Reinigungspauschale für die Reinigung im Ultraschallbad hinzu.

3.12 Verschraubungen und Filter

Wir empfehlen stirnseitig mit O-Ring abdichtende Verschraubungen. Dicht-

mittel und Teflonband sind somit nicht nötig.Verschraubungen können einen

zusätzlichen Druckabfall verursachen. Bitte berücksichtigen Sie diesen

Umstand.

Beachten Sie, dass die Gewindetiefe im Gerät für die Verschraubungen im G¼”-Körper maximal 10mm und im G

½”-Körper maximal 13 mm beträgt. Zu lange Gewinde an den Verschraubungen können zu internen Beschädigun-

gen und Fehlfunktionen führen.

12 13

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Wenn Sie keine Verschraubungen gemäss Kapitel 3.12 Verschraubungen und Filter einbauen, empfehlen wir grundsätzlich

einen anderen Filter oder zumindest ein Feinsieb vor den Messgeräten einzubauen. Es kommt vor, dass Feststoffe wie

Schweissrückstände, Metall- oder Kunststoffteile, Rost, Abdichtband, etc. die Funktion beeinträchtigen.

Bei Druckluftanwendungen mit Kompressoren muss die Luft trocken und ölfrei sein. Bitte sorgen Sie dafür, dass eine

geeignete Aufbereitungseinheit vor den Geräten eingesetzt wird. Weitere Infos finden Sie unter Betrieb/Wartung auf den

Folgeseiten.

3.13 Filter / Gasreinheit

3.14 Elektrischer Anschluss

Der Durchflussmesser kann mit einer Standard AA-Batterie betrieben werden. Als Fremdspeisung stehen ein USB micro-B

Kabel für die Speisung über einen USB-Port oder ein Kabel mit losen Enden für den Anschluss an Klemmen zur Verfügung

(8 – 30Vdc).

Die Lebensdauer der Batterie hängt stark von der Qualität der Batterie ab. Es können handelsübliche Batterien eingesetzt

werden, sofern die Spannung zwischen 1,2 und 1,8 Vdc liegt. Der Durchflussmesser wird mit folgender Batterie geliefert:

Alkali-Magnesium-Dioxyd Batterie mit einer Kapazität von 3000 mAh (ANSI: 15A IEC: LR6).

Es ist grundsätzlich möglich, aufladbare Batterien zu verwenden. Diese Akkus können jedoch nicht im Gerät auf-

geladen werden.

Die hinterleuchtete Anzeige ist ausschliesslich mit einer Fremdspeisung möglich und auch nur dann, wenn sich das Gerät

nicht im ECO-Modus befindet (siehe Kapitel 4.12.1 Messung für weitere Informationen).

Bei Anschluss oder Wechsel der Batterie ist sämtliche Stromversorgung zu unterbrechen.

3.15 Austausch der Batterie

Bei Anschluss oder Wechsel der Batterie ist sämtliche Stromversorgung

zu unterbrechen.

Die Batterie befindet ist in einem Kunststoff-Gehäuse. Dieses kann als

Ganzes vom Gehäuse des Durchflussmessers entfernt werden. Hierzu

halten Sie das Gerät mit der einen Hand am metallischen Grundkörper

fest und ziehen mit der anderen Hand das Batteriegehäuse möglichst

gerade nach hinten weg. Achtung: Verdrehen Sie das Batteriegehäuse

nicht beim Wegziehen, da Sie sonst Kunststofflaschen beschädigen

können.

Entnehmen Sie die verbrauchte Batterie und entsorgen Sie diese umwelt-

gerecht!

Setzen Sie eine neue Batterie ein und klicken Sie das Batteriefach parallel

ins Gerätegehäuse ein

Zum Aufstarten des Durchflussmessers berühren Sie das Touch-Screen-

Display während mehr als 3 Sekunden. Das Einsetzen des Batteriefaches

führt nicht automatisch zum Einschalten des Gerätes.

Eine falsch eingesetzte Batterie führt nicht zu Schäden am Durchfluss-

messer. Entfernen Sie in diesem Fall das Batteriegehäuse und setzen Sie

die Batterie korrekt ein.

Die Geräte der Serie VG sind nach dem Einschalten innerhalb von 5 Sekunden betriebsbereit.

3.16 Aufwärmzeit

3.13 FILTERS / GAS CLEANLINESS

We always recommend that a ﬁlter, or at least a ﬁne-mesh sieve (50 microns), is installed before the measu-

ring devices. It often happens that solid matter such as welding residues, metal or plastic chips, rust, sealing

tape, etc. affect the function. In pressurized-air applications using compressors, the air must be dry and free

of oil. Please ensure that a suitable processing unit is located before the devices. In the case of gases from

cylinders, in general no ﬁlter is needed.

3.14 ELECTRICAL POWER SUPPLY

The VG series can be provided with power from a standard AA battery or from a common USB micro-B

charger that you typically use for the charging of your android phone. There are optional modules by which

you can apply a 8 to 30 Vdc external power.

The lifetime of the battery strongly depends on the type and quality of the AA battery you use. We recom-

mend (and determine the speciﬁcations with) an Alkaline-Manganese Dioxide Battery with a capacity of

3000 mAh (ANSI: 15A IEC: LR6).

Other types of batteries (for instance Zinc Carbon, Zinc Chlorine, NiCd, NiMH or Li-ion) can be used, as long

as the voltage is 1.2 to 1.8 Vdc. Using other batteries will inﬂuence the life of the battery when used in the

red-y compact 2 ﬂow meter.

It is also possible to use rechargeable batteries, but the unit will however not charge the battery if powered

by the USB micro-B.

We strongly recommend to remove the battery from the case if you do not use the meter for longer periods

of time to avoid damage to the ﬂow meter in case the battery starts to leak. The unit will retain its settings

so when you re-insert the battery the settings will be the same as when you took it out. (The totalizer will be

stored to the non-volatile memory once every 10 minutes, so the stored value will never be older than 10

minutes)

There is no need to remove the battery if you connect the USB power supply. When you run the unit on po-

wer from the USB micro-B and have a battery inserted, you can remove the USB connector and the battery

automatically takes over.

When the unit is powered by the battery you will not see the backlight to

conserve energy. The backlight is only operational when there is a power

supply other than a battery and the unit is not in ECO mode.

(When you replace or install a battery, all power to the unit should be discon-

nected.)

3.15 HOW TO REPLACE THE BATTERY?

When you replace or install a battery, all power to the unit should be

disconnected.

The battery is in plastic compartment mounted above the body and connec-

ted to the main display/electronics housing. This plastic part has 3 notches

on each side. With one hand hold the housing on the sides of the display and

with your other hand grab the side where the plastic notches are located.

Pull the battery compartment from the main housing. Replace the battery

and push the battery compartment back on the main housing.

By pushing the battery compartment into place you automatically connect

the battery to the electronics. It will take a few seconds for the meter to start

up. You have to press the screen for about 3 seconds in order to switch the

unit on. Replacing the battery will not automatically turn on the unit. Inserting

the battery incorrectly will not damage the unit.

3.16 WARM-UP TIME

All instruments of Series VG are ready for use within seconds of connecting

the power. There is no signiﬁcant warm-up time (<5 sec).

4. OPERATION

In case of incorrect operation of the ﬂow meter the measurement function can be impaired.

4.10 INTRODUCTION

The Series VG has a touch screen based on pressure. You can operate the screen with your ﬁnger or an ob-

ject that does not create any scratches on the display. The display has a backlight that only operates if the

unit is powered by an external power source. To start the unit, insert a battery or connect an external power

supply (USB or 24 Vdc). Press the screen for at least 3 seconds until the unit switches on. When connecting

the unit to an external power source it will be turned on automatically. Once you switch the unit on you are

able to access a menu structure with which you can adjust the meter for your speciﬁc applications and pre-

ferences.

Before you put the unit into operation verify that the unit is suitable for your application (gas, range,

pressure and temperature). You ﬁnd these details on the supplied calibration sheet. If any of these

details deviate from your application please contact the factory.

The ﬂow direction indicated by an arrow on the back side of the housing has to be respected.

4.10.1 START-UP SCREEN

When the unit starts up, it will show a startup screen for 4 seconds (Screen name: Sensor mode). After this

screen you will see the main home screen that indicates the primary values. The home screen can be shown

in horizontal or vertical mode (see ﬁgures above). On the right top you see the battery icon or the symbol for

external power. The bar graph represents the current ﬂow graphically. The display also shows the selected

gas and the selected measuring units.

Note: If you hold the screen too long during start up, you get into the “service mode”. Hold the dis-

play for 6 seconds to leave the service mode.

Note: The display has a vertical and horizontal home mode. The unit will select the mode depending on the

position of the ﬂow meter. In chapter 4.12.2.3 Orientation you will learn how to adjust the display position

manually.Display ﬂow reading resolution.

4.10.2 RESOLUTION OF FLOW INDICATOR

The VG series has the ability to show the actual ﬂow in many different engineering units. This means that the

number of digits in the readout can change a lot. In automatic resolution mode the VG series calculates the

required number of digits depending on the range and selected units. This resolution is however adjustable

by the user (See chapter 4.12.5 Resolution).

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In case of incorrect operation of the flow meter the measurement function can be impaired.

4. Operation

4.10 Introduction

The Series VG has a touch screen based on pressure. You can operate the screen with your finger or an object that does

not create any scratches on the display. The display has a backlight that only operates if the unit is powered by an external

power source. To start the unit, insert a battery or connect an external power supply (USB or 24 Vdc). Press the screen

for at least 3 seconds until the unit switches on. When connecting the unit to an external power source it will be turned on

automatically. Once you switch the unit on you are able to access a menu structure with which you can adjust the meter

for your specific applications and preferences.

Before you put the unit into operation verify that the unit is suitable for your application (gas, range, pressure and

temperature). You find these details on the supplied calibration sheet. If any of these details deviate from your

application please contact the factory.

The flow direction indicated by an arrow on the back side of the housing has to be respected.

When the unit starts up, it will show a startup screen for 4 seconds (Screen name: Sensor mode). After this screen you will see the main

home screen that indicates the primary values. The home screen can be shown in horizontal or vertical mode (see figures above).

On the right top you see the battery icon or the symbol for external power. The bar graph represents the current flow graphically. The

display also shows the selected gas and the selected measuring units.

4.10.1 Start-up screen

Note: The display has a vertical and horizontal home mode. The unit will select the mode depending on the position of the

flow meter. In chapter 4.12.2.3 Orientation you will learn how to adjust the display position manually.Display flow reading

resolution

4.10.2 Resolution of flow indicator

The VG series has the ability to show the actual flow in many different engineering units. This means that the number of

digits in the readout can change a lot. In automatic resolution mode the VG series calculates the required number of digits

depending on the range and selected units. This resolution is however adjustable by the user (See chapter 4.12.5 Resolu-

tion).

Messeinheit

Medium

Anzeige Mediumsname in der chemi-

schen Kurzbezeichnung (ausser Luft)

Totalisator

Anzeige vom Totalwert mit Einheit,

mit max. neun Stellen

Display of alarms and

notifications

Power Supply

Display of battery charge level with

3 segments or display of activated

power supply

Display of actual flow rate,

max. 6 digits

Indication of the flow units

being measured. User

selectable

Graph display of acutal flow

rate within the flow range of

the device

Graph

Power Supply

Display of battery charge

level with 3 segments or

display of activated power

supply

Medium

Name of chemical formula of

the gas measured

Measurement Units

Indication of the flow units being mea-

sured. User selectable

Alarms

Graph

Graph display of actual flow rate

within the flow range of the

device

Flow Rate

Display of acutal flow rate,

max 6. digits

Touch Display

High resolution touch sensitive

display. Blacklight when

compact is externally powered.

Overflow Indication

Notification if flow passes

over 108% of full scale

Display of alarms

Figure: Display main home screen horizontal

Figure: Display main home screen overview vertical

Alarms & Notifications

Flow Rate

Measurement Units

Medium

Name or chemical formula of the gas

measured

Totalisator

Display of the totalized flow. Units

user selectable, max. 9 digits

Note: If you hold the screen too long during start up, you get into the “service mode”. Hold the display for 6 seconds

to leave the service mode.

VG Mass Flow Meter

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In case of incorrect operation of the flow meter the measurement function can be impaired.

4. Operation

4.10 Introduction

The Series VG has a touch screen based on pressure. You can operate the screen with your finger or an object that does

not create any scratches on the display. The display has a backlight that only operates if the unit is powered by an external

power source. To start the unit, insert a battery or connect an external power supply (USB or 24 Vdc). Press the screen

for at least 3 seconds until the unit switches on. When connecting the unit to an external power source it will be turned on

automatically. Once you switch the unit on you are able to access a menu structure with which you can adjust the meter

for your specific applications and preferences.

Before you put the unit into operation verify that the unit is suitable for your application (gas, range, pressure and

temperature). You find these details on the supplied calibration sheet. If any of these details deviate from your

application please contact the factory.

The flow direction indicated by an arrow on the back side of the housing has to be respected.

When the unit starts up, it will show a startup screen for 4 seconds (Screen name: Sensor mode). After this screen you will see the main

home screen that indicates the primary values. The home screen can be shown in horizontal or vertical mode (see figures above).

On the right top you see the battery icon or the symbol for external power. The bar graph represents the current flow graphically. The

display also shows the selected gas and the selected measuring units.

4.10.1 Start-up screen

Note: The display has a vertical and horizontal home mode. The unit will select the mode depending on the position of the

flow meter. In chapter 4.12.2.3 Orientation you will learn how to adjust the display position manually.Display flow reading

resolution

4.10.2 Resolution of flow indicator

The VG series has the ability to show the actual flow in many different engineering units. This means that the number of

digits in the readout can change a lot. In automatic resolution mode the VG series calculates the required number of digits

depending on the range and selected units. This resolution is however adjustable by the user (See chapter 4.12.5 Resolu-

tion).

Messeinheit

Medium

Anzeige Mediumsname in der chemi-

schen Kurzbezeichnung (ausser Luft)

Totalisator

Anzeige vom Totalwert mit Einheit,

mit max. neun Stellen

Display of alarms and

notifications

Power Supply

Display of battery charge level with

3 segments or display of activated

power supply

Display of actual flow rate,

max. 6 digits

Indication of the flow units

being measured. User

selectable

Graph display of acutal flow

rate within the flow range of

the device

Graph

Power Supply

Display of battery charge

level with 3 segments or

display of activated power

supply

Medium

Name of chemical formula of

the gas measured

Measurement Units

Indication of the flow units being mea-

sured. User selectable

Alarms

Graph

Graph display of actual flow rate

within the flow range of the

device

Flow Rate

Display of acutal flow rate,

max 6. digits

Touch Display

High resolution touch sensitive

display. Blacklight when

compact is externally powered.

Overflow Indication

Notification if flow passes

over 108% of full scale

Display of alarms

Figure: Display main home screen horizontal

Figure: Display main home screen overview vertical

Alarms & Notifications

Flow Rate

Measurement Units

Medium

Name or chemical formula of the gas

measured

Totalisator

Display of the totalized flow. Units

user selectable, max. 9 digits

Note: If you hold the screen too long during start up, you get into the “service mode”. Hold the display for 6 seconds

to leave the service mode.

VG Mass Flow Meter

14 15

4.10.3 ALARMS AND NOTIFICATIONS ON HOME SCREENS

Flow Rate

If the ﬂow is higher than 108% of the calibrated full scale, the message: “OVF” will be shown in the “Alarms

and notiﬁcation” section in the top of the screen.

If you select an engineering unit for the ﬂow indication that has too many digits to display for the range of

the unit, the area where the ﬂow is normally displayed, will show: “Out of range”. Select a different ﬂow unit

in section 4.12.3 Units.

Totalizer

If the totalized value exceeds the 8 available digits or you selected a totalized unit that exceeds the current

totalized ﬂow, the totalizer will show all 9’s on it display. (9999999). You will have to select an engineering

unit for the totalizer indication that is big enough to show all totalized ﬂow (for instance m3n or kg). Select a

different ﬂow unit in section 4.12.3 Units.

Alarm notiﬁcations

If you make use of the optional alarm module you will see the status on the main screen. More information

on the Alarm module see chapter 4.11.2 Alarm Menu.

4.10.4 HOME SCREENS AND MENU ACCESS

The VG series has in horizontal mode the following customer selectable “home screens” (In vertical mode

there is only one “home screen”.): These home screens are:

„Overview“: Shows ﬂow + ﬂow totalizer + bar graph

„Flow“: Shows ﬂow in big digits

„Total“: Shows the totalized ﬂ ow in big digits

„Alarme“: Alarm screens 1 to 3 (or notiﬁ cation if no alarm module is connected)

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4.10.3 Alarme und Hinweise auf der Hauptseite

Durchfluss-Anzeige

Wenn der Durchfluss mehr als 108% des Endwertes erreicht, erscheint in der der Anzeige die Meldung “OVF” (Über-

schreitung Messbereich).

Würde die gewählte Messeinheit den Platz für die Darstellung überschreiten, erscheint die Meldung “Out of range”. Wäh-

len Sie eine andere Einheit gemäss Kapitel 4.12.3 Units

Totalisator-Anzeige

Der Totalisator kann 8 Stellen anzeigen. Wenn der Zählerstand 999.99999 erreicht, zählt der Gesamttotalisator trotzdem

intern weiter. Wählen Sie eine grössere Messeinheit, damit der Totalisator wieder die gesamte Menge anzeigt. (z. B. von ln

auf m3n). Die Einheiten werden in Kapitel 4.12.3 Units beschrieben.

Bei Nutzung des optionalen Alarm-Moduls werden Alarm-Status auf dem Übersichtsbildschirm angezeigt. Weitere Informa-

tionen dazu finden sie im Kapitel 4.11.2 Alarm Menü.

Alarm-Benachrichtigungen

4.10.4 Hauptseite und Menüführung

Der Serie VG bietet im horizontalen Display-Modus verschiedene vom Kunden wählbare Startseiten:

„Overview“: zeigt den aktuellen Durchfluss, Total und den Bargraph an

„Flow“: zeigt nur den Durchﬂusswert in grossen Ziffern an

„Total“: zeigt nur den Totalisator in grossen Ziffern an

„Alarme“: zeigt Alarm-Seite 1-3 bzw. Angabe, dass kein Alarm-Modul angeschlossen ist

** ist nur bei aufgestecktem Alarm-Modul aktiv

Bei einer Bildschirmberührung von weniger als 1 Sekunde wird zwischen den oben beschriebenen Anzeigen gewechselt.

Sie haben die Möglichkeit, Hauptseiten zu deaktivieren (verbergen). Siehe dazu Kapitel 4.12.1.1 Home screen.

Hauptseite 1: zeigt sowohl den aktuellen Durchfluss in grossen Zahlen und den Totalisator in

kleineren Zahlen. Der Bargraph entspricht 0-100% des maximalen Durchflusses. A1, A2 und A3

räpresentieren die Alarmkontakte und erscheinen nur, wenn das optionale Alarmmodul installiert ist.

Hauptseite 2: zeigt den aktuellen Durchfluss in grossen Zahlen an

Hauptseite 3: zeigt den aufsummierten Fluss (Total) in grossen Zahlen an.

Hauptseite 4 - 6: Anzeigen spezifisch für die individuellen Alarme (jeder Alarmkontakt hat eine

eigene Seite). Hier können die Einstellungen des Alarms abgelesen werden und der Alarm kann

zurückgestellt werden, sofern er aktiv ist.

Wenn Sie eine der Startseiten länger als 1 Sekunde berühren, gelangen Sie ins Hauptmenü.

Dieses wird gemäss Bild rechts dargestellt. Das Menü wird immer im horizontalen Modus

angezeigt.

Hier können Sie bei Bedarf die Einstellungen ändern. Falls Sie ein Passwort aktiviert haben,

müssen Sie dieses vorgängig eingeben (siehe Kapitel 4.12.6 Security (Sicherheit)).

4.10.5 Menüführung und Tastenfunktion

Wenn Sie in ein Menü mit mehreren Seiten gelangen, wird dies oben rechts mit zwei Ziffern angezeigt.

Beispiel 1/4: Sie befinden sich auf der ersten von total 4 Seiten.

Im unteren Bereich der Anzeige finden sie die Navigationsleiste mit folgenden Funktionen:

Zurück zur vorherigen Seite. Bei längerer Berührung gelangen Sie zurück zur Startseite

Nach oben oder nach unten / vergrössern oder verkleinern

Speichert den gewählten/veränderten Wert

If you touch any of the home screens longer than one second you will access the Main Menu. You will see

the screen shown on the right. The menu will always be displayed in horizontal mode. From this menu you

can modify your preferences and access the alarm settings menu. If you have the password activated, you

have to enter your passcode before you have access to the Main menu (See 4.12.6 Security).

4.10.5 BUTTONS AND SELECTION

Each menu has a name (See top inverted bar) and on the upper right you see 2 numbers (example 1/6). The

ﬁrst number shows which item you selected, the second number how many items there are in the menu you

selected. At the bottom of most screens you ﬁnd the inverted buttons. Meaning of buttons:

Return: Return to the previous menu. If you hold it for longer than 0.5 sec you return to the home screen

Up/down: increase/decrease (you can also select a menu item by touching the relevant line)

Select/conﬁrm: Store selected value

Home screen 1: Screen which shows both the actual ﬂow and the totalizer in smaller

digits. The bar graph represents 0-100% of the maximum ﬂow range. The A1, A2 and

A3 represent the alarms and only show when you have installed the optional alarm

module.

Home screen 2: Screen which shows the actual ﬂow.

Home screen 3: Screen which shows the totalized ﬂow in big digits.

Home screen 4 to 6: Screens dedicated to the individual alarm (Each alarm has its

own page. Here you can read the main settings of an alarm. If the alarm is activated

you can reset it here if the manual reset is activated. These screens are only relevant if

the alarm module is installed.