Wohler DC 410FLOW User manual

The Measure of Technology

Manual

Pressure Differential and Flowmeter

Art. n°. 22627 – 2012-08-26

Wöhler DC 410

FLOW

99 Washington Street

Melrose, MA 02176

Phone 781-665-1400

Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

Contents

2

Contents

1 General Information .............................. 4

1.1 Operation Manual Information ....................... 4

1.2 Notes ............................................................. 4

1.3 Intended Use ................................................. 4

1.4 Basic equipment ............................................ 5

1.5 Transport ....................................................... 5

1.6 Information on disposal ................................. 5

1.7 Manufacturer ................................................. 5

2 Specifications ........................................ 6

2.1 Measured Data .............................................. 6

2.2 Calculated Values ......................................... 7

2.3 Logger ........................................................... 9

2.4 Technical Data ............................................ 10

3 Component Explanation .................... 11

3.1 Basic Unit .................................................... 11

3.2 Probes and Components ............................. 13

3.3 Function ...................................................... 15

3.4 Functions ..................................................... 16

3.5 Display and Key Setup ................................ 16

4 Getting Started .................................... 18

4.1 Check Battery Status................................... 18

5 Operation ............................................. 20

5.1 Turning the Pressure Computer on and Self

Check .......................................................... 20

5.2 Measuring ................................................... 20

5.3 Special Tips ................................................. 21

6 Measurement Modes in the Main

Menu 23

6.1 Selecting the Main Menu ............................. 23

6.2 Option „Air Speed“....................................... 23

6.2.1 Measuring the Air Speed ............................. 24

6.2.2 Theoretical Background .............................. 25

6.3 Option „Airflow (Pitot)“ ................................. 26

Contents

3

6.3.1 Measuring the Airflow (Pitot) ........................ 26

6.3.2 Grid-point Measurements ............................ 27

6.4 Option „Airflow (k value)“ ............................. 30

6.4.1 Theoretical Backround ................................. 30

6.4.2 Connecting the Wöhler DC 410

Flow

to the

Vent ............................................................. 31

6.4.3 Performing the Test ..................................... 32

6.5 Option “4 Pa Test“ ....................................... 34

6.6 Option „Energy Utilization Check“ ................ 38

6.7 Option „U value“ ........................................... 45

6.8 Option “Volume“ ........................................... 46

6.9 Graph / Record ............................................ 48

6.10 Printing out Measurement Records ............. 50

6.11 Option "Save measurements" ...................... 51

6.12 Option "SETUP" ........................................... 51

7 Option 'Data management' ................ 53

7.1.1 Save Customer Records .............................. 54

7.1.2 Creating a New Customer Folder ................ 55

7.2 Option "Data management" ......................... 56

7.3 Data Transfer with the PC or Notebook ....... 56

7.4 Data Logging ............................................... 56

8 Troubleshooting ................................. 57

9 Maintenance ........................................ 57

9.1 Maintenance work ........................................ 57

10 Warranty and Service ......................... 58

10.1 Warranty ...................................................... 58

10.2 Service ......................................................... 58

11 Accessories......................................... 59

12 Declaration of conformity .................. 60

Points of sale and service ............................ 61

General Information

4

1 General Information

1.1 Operation Manual

Information

This operation manual allows you to work safely

with the Wöhler DC 410

FLOW

. Please keep this

manual for your information.

The Wöhler DC 410

FLOW

Flow and Pressure Meter

should be employed by professionals for its in-

tended use only.

Any damages caused by not following this manual

are excluded from liability.

1.2 Notes

WARNING!

Not following this warning can cause injury or

death.

ATTENTION!

Not following this note can cause permanent

damage to the device.

NOTE!

Useful information

1.3 Intended Use

The meter can be used for the measurement of

differential pressure, airflow, air speed and tem-

perature as well as for the registration of humidity

and barometric pressure. It is especially designed

for the following purposes:

 Acceptance measurements at ventilation

systems according to DIN EN 12599.

 4 PA Pressure Test to confirm the combustion

air availability.

 Measurement of the ventilation loss and the

surface loss

 Flow pressure, installation pressure, standing

pressure, jet pressure

 Flow measurement in air and flue gas ducts

 Data logger

General Information

5

1.4 Basic equipment

Meter

Components

Wöhler DC 410

FLOW

Flow and Pressure

Meter

2 capillary tubes

Batteries

Plastic case

1.5 Transport

ATTENTION!

Improper transport can harm the instrument.

Always transport the instrument in the provided

carrying case in order to prevent damage. The

pressure connectors have to be protected by the

protection cap.

The case is included in the sets and can also be

bought separately.

1.6 Information on disposal

Electronic equipment does not belong into domes-

tic waste, but must be disposed according to the

applicable statutory provisions.

You may hand in any defective batteries taken out

of the unit to our company as well as to recycling

places of public disposal systems or to selling

points of new batteries or storage batteries.

1.7 Manufacturer

Specifications

6

2 Specifications

2.1 Measured Data

Differential pressure

Description

Data

Range

±100 hPa

Accuracy

< 3 % of the reading, if

the value is < ± 10 Pa,

better than

± 0.3 Pa

Resolution

0.1 Pa at

-1,100 Pa to

+1,100 Pa, otherwise

1 Pa

Measurement of very small pressures

Description

Data

Range

± 100 Pa

Accuracy

< 3 % of the reading, if

the value is < ± 10 Pa,

better than

± 0.3 Pa

Resolution

± 0,01 Pa

Temperature (internal sensor)

Description

Data

Range

-20 °C to 60°C

Accuracy

< ± 1 °C

Resolution

0.1°C

Specifications

7

External temperature probe

(optional, e.g. with Measuring Pli-

ers for Temperature Measurement

or Special Wall Temperature

Probe)

Description

Data

Range

2 canals, -20.0 °C to

+800.0 °C

Accuracy

< ± 2 °C at 0°C to

133°C, otherwise 1.5

% of the value, ac-

cording to the directive

EN 50379-2

Resolution

0.1°C

Relative humidity

(internal sensor)

Description

Data

Range

0 % to 100 % rh (rela-

tive humidity), non

condensing

Accuracy

< ± 2 % RH, in range 0

to 90 % RH, otherwise

< 3 % RH

Resolution

0.1 % RH

Barometric Pressure

(integrated barometric pressure

sensor)

Description

Data

Range

±300 hPa to 1,100 Pa

Accuracy

< ± 1.5 % hPa of rea-

ding

Resolution

0.1 hPa

2.2 Calculated Values

Variable

Calculation

Pressure units

hPa, Pa, mmH

2

O, PSI, in

wc

,

bar, mbar, conversion ac-

cording to the general con-

version rules

Temperature

unit

°C and °F, conversion ac-

cording to the general con-

version rules

Specifications

8

Air speed

Description

Data

Range

0.3 m/s to 120 m/s

Resolution

0.01 m/s

Continuous density

correction

automatic, with

temperature signal

Specifications

9

2.3 Logger

Description

Data

Extent

9999 measurements,

each with the meas-

ured value of pressure

and humidity and

three temperature

values (if the external

temperature sensors

are connected) can be

stored in the internal

memory. The user can

set the log rate from 1

second to 24 hours.

USB interface for data

transfer to a PC

Permanent online da-

ta, already during the

registration

User adjustable log

rate

Sampling interval of 1

second to 24 hours

can be set.

NOTE!

Ensure that the meter is connected to the power

supply or that the batteries are charged.

Specifications

10

2.4 Technical Data

Description

Data

Current consumption

4 AA rechargeable

batteries or 4 AA

disposable batteries

1.5 volt

- working mode:

ca. 60 mA,

- off-mode and log

mode:

ca. 45 µA for clock

and processor

Interfaces

USB- (COM-Port),

data transfer to the PC

It is possible to trans-

fer the data directly

from the meter to the

Wöhler TD 600 ther-

mal fast printer.

Storage temperature

-20 °C to +60 °C

Operating temperature

5 °C to +40 °C

Mass

ca. 365 g, with batter-

ies and integrated

magnet

Dimensions

80 x 550 x 60 mm

Date and time

Date and time are

included in the meas-

urement report

Internal memory

2 MB

Component Explanation

11

1

3

3 Component Explanation

3.1 Basic Unit

Fig. 1: Overview

2

4

5

6

7

8

©

9

©

10

11

12

Component Explanation

12

Number

Function

1

Mini-USB-Port

2

Connection for protection cap

3

Power jack

4

Color display

5 ESC key

context-sensitive

Escape

NOTE!

Keeping this button pressed will always call up the

main menu.

6 Arrow keys

The function changes according to the context. Scroll

up and down.

7 ENTER

and On-/Off key

a) Confirm the setting.

b) The function of the key changes according to the

context.

c) Press and hold the key for 3 seconds to turn off the

unit.

8 Infrared interface

Thermal fast printer to print out the measurement report

9 Overpressure socket

(+)

Main connection

10 Underpressure so-

cket (--)

Reference socket for the measurement of the the dif-

ferential pressure and static socket for the S-tube probe

11, 12

Standard jacks for temperature probes NiCr-Ni

14

Battery cover (in Fig. 1 on the rear side)

There are diffusion openings for the internal registration

of humidity and temperature on the rear side of the

Wöhler DC 410

FLOW

. The internal temperature meas-

urement is necessary for the temperature compensa-

tion of the pressure sensor.

Component Explanation

13

3.2 Probes and Components

Fig. 2: S-tube probe

S-tube probe for measuring the air speed (see

chapter 6.2) and the airflow (see chapter 6.3).

 Insert the plug of the S-tube probe into jack 11

(Fig. 1) of the Wöhler DC 410

FLOW

.

 Connect the overpressure hose (turned against

the flow) of the S-tube probe to the overpres-

sure socket (+) (Fig. 1, part 9) and the

underpressure hose to the underpressure

socket (-) (fig. 1, part 10).

Fig. 3: Capillary tube

Capillary tube for the 4 PA test. Two capillary tubes

are necessary.

Component Explanation

14

Fig. 4: Connecting a temperature

measuring plier

Two temperature measuring pliers can be con-

nected at the same time.

 Insert the plug of the temperature measuring

pliers into the jacks 11 and 12 (Fig. 1) of the

Wöhler DC 410

FLOW

.

The temperature value measured by the meter

connected to jack 11 will be indicated in the display

as T1 and the one measured by the meter con-

nected to jack 12 will be shown as T2.

NOTE!

Any thermocouple type K may be connected to

the jacks 12 and 13.

Fig. 5: Connecting the Special Wall

Temperature Probe for measuring the

heat transmission coefficient

Connecting the Special Wall Temperature Probe

for measuring the heat transmission coefficient

(See chapter 6.7). Two Special Wall Temperature

Probes can be connected at the same time.

 Insert the plug of the Wall Temperature Probes

into the jacks 11 and 12 (Fig. 1) of the Wöhler

DC 410

FLOW

.

Component Explanation

15

3.3 Function

Pressure

sensor

Pressure socket (+)

Absolute-pressure

and humidity sen-

sor

Fig. 6: Interior structure of the meter

Pressure socket (-)

Component Explanation

16

3.4 Functions

The Flow and Pressure Meter Wöhler DC 410

FLOW

is a high precision multimeter for the measure-

ment of differential pressure, volume flow and

temperature as well as the registration of humidity

and barometric pressure. Because of its extremely

high precision, the meter measures even very

small pressures. Therefore it is ideal to determi-

nate the air speed, gas pressure, volume, tension

and also the flue gas temperature is registered. A

maximum measuring range up to 100 hPa and a

burst pressure of 0.75 bar provide a sufficient

degree of security even for high pressure ranges.

3.5 Display and Key

Setup

Fig. 7 : Display and keys

The Wöhler DC 410

FLOW

has a color 2.4' display.

The OLED-technology allows reading the display

from almost every angle of view.

Below the display four keys are available to oper-

ate the Wöhler DC 410

FLOW

.

Escape

Scroll/Zoom

On/Off

Component Explanation

17

The display is divided into a status, a menu and a

readings segment.

The currently selected task is shown in the left

status segment.

- Date and time, customer (if selected), system

diagnosis status and battery level are shown in

the status segment on the right.

The readings segment displays the readings or

the menu items.

The menu segment is situated at the bottom of the

display. It consists of three soft keys.

Fig. 8: Display details

Getting Started

18

4 Getting Started

4.1 Check Battery Status

Fig. 9: Position of the batteries in the

Wöhler DC 410

FLOW

When the device is switched on, the battery indi-

cation is displayed in the upper right hand corner

of the screen. A fully charged set of batteries is

shown as a solid green battery symbol. An empty

red symbol indicates discharged or empty batter-

ies. If the batteries are almost empty the back light

will dim out. The warning "charge batteries" will

appear. In this case, finish the measuring process

as soon as possible.

WARNING!

Incorrect use of batteries can cause injury!

Never expose the battery to fire or high tempera-

tures. Danger of explosion!

Liquids can leak out of the batteries due to mis-

treatment. Never touch the liquid. If you got in

contact to the liquid remove it with water. If the

liquid got into your eyes, remove it with water and

see your doctor as soon as possible.

WARNING!

Risk of electrical shock!

Never touch the power supply with wet hands!

Protect the power supply against water and mois-

ture!

Do not unplug the recharger by pulling the cable!

Do not use the power supply when the voltage

requirements of the recharger and the supply do

not match!

The batteries can be recharged even while they

are located in the analyzer.

NOTE!

You can still go on measuring while battery

charging is in progress.

Getting Started

19

ATTENTION!

- Ensure rechargeable batteries are equipped in

the DC 430

FLOW

before charging. Never try to

charge disposable batteries.

Use 4 AA rechargeable batteries only.

- Only use the Wöhler charger.

How to charge the batteries:

 Before you plug the recharger into the outlet,

connect it with the charging connection of the

DC 430

FLOW

(Fig. 1, part 3)

Fig. 10: Open the battery compartment.

Standard AA rechargers can be used for external

charging when the batteries are not located in the

analyzer.

 To remove the batteries from the DC 430

FLOW

open the battery compartment cover by press-

ing the clip and pushing the battery compart-

ment cover at the same time.

Recharging empty batteries can take up to 3

hours.

NOTE!

To ensure maximum capacity use batteries of

same age and condition only. Always replace a

full set of batteries when necessary.

Operation

20

5 Operation

5.1 Turning the Pressure

Computer on and Self

Check

Fig. 11: Key pad with on/off-key

Fig. 12: Zeroing

ATTENTION!

Before the meter is used, a visual check must

ensure each and every time that all functions

work properly.

 Turning on the meter: Press on/off-key (on the

right)

The Meter will automatically start with a 10 se-

cond self test and zeroing.

ATTENTION!

Do not connect any hose while the meter is per-

forming the self check and do not expose it to

any differential pressure, because the pressure

sensor will automatically be zeroed during the

self test.

5.2 Measuring

Fig. 13: Measuring mode

After that the meter will automatically switch to the

measuring mode.

Al readings (measured and computed values) will

be shown continuously in the readings segment.

The following functions can be selected from the

menu segment

 "Menu" key: opens the main menu

 Zoom: Turns the zoom-mode on and off (hold-

ing the button pressed).

 Option „P

D

=0“: Differential pressure The pres-

sure sensor will be zeroed once again.

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Wohler DC 410FLOW User manual

Wohler DC 410FLOW User manual

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