Chauvin Arnoux C.A 824 Manual de usuario

C.A 824

■Thermo-anémomètre à hélice

■RotatingVaneThermo-anemometer

■Flûgelradanemometer+Thermometer

■Termoanemometroadelica

■Termoanemómetrodehélice

FRANÇAIS

ENGLISH

DEUTSCH

ITALIANO

ESPAÑOL

Notice de fonctionnement

User's manual

Bedienungsanleitung

Libretto d'Istruzioni

Manual de Instrucciones

CONTENTS

1. CONTROLS PRESENTATION.........................................9

2. OPERATING................................................................... 10

3. SPECIFIC FUNCTIONS................................................. 10

4. SPECIFICATIONS .......................................................... 11

5. MAINTENANCE ............................................................. 12

6. TO ORDER..................................................................... 13

1.CONTROLSPRESENTATION

1. Menu selection / menu scrolling button

2. MIN / MAX function activation button

3. Validation button

4. ON / OFF and escape function button

5. Measurement freezing button

2. OPERATING

2.1 Language selection

When the device is off, keep the OK button pressed and then

press the ON / OFF button.

Press HOLD to validate English or press SELECT to validate

French.

2.2 Measurement procedure

1. Activate the device by pressing the ON / OFF button.

2. Choose the desired measurement unit for temperature and

air velocity (See Menu).

3. Choose the variable to be measured: air velocity and

temperature or air flow (see Menu).

4. Place the probe in the correct air flow direction. For more

accurate results, try to keep the axis of the vane within 20°

of the air flow direction.

5. Wait a few seconds for the measurements to stabilise.

6. If necessary, freeze the display by pressing HOLD.

3. SPECIFIC FUNCTIONS

3.1 Choosing the measurement units

Press SELECT to enter the menu.

Scroll down the menu with SELECT.

When UNITS appears, enter with OK.

Scroll down the air velocity measurements units by pressing

SELECT.

Press OK to validate your choice.

Proceed the same way with the temperature measurements

units.

3.2 Making an average calculation

Press SELECT to enter the menu.

Scroll down the menu with SELECT.

When AVERAGE appears, enter with OK.

To start the average calculation press OK.

Press OK again to stop the calculation. The result is displayed

on the screen.

To start another calculation, proceed the same way.

To escape the function, press "ON / OFF / ESC".

3.3 Making an air flow calculation

Press SELECT to enter the menu.

Scroll down the menu with SELECT.

When FLOW appears, enter with OK.

Choose the type of duct: RECT. for rectangular or CIRC. for

circular with SELECT and validate with OK.

Choosethe dimensionsunit(mmor in) with SELECTandvalidate

with OK.

Enter the length of the duct in the case of a rectangular duct:

modify each of the 4 digits with SELECT and validate with OK.

Proceed the same way with the width or the diameter in the

case of circular duct.

The measurement is displayed on the screen.

To modify the measurement unit once in the FLOW function,

follow the measurement unit choice procedure above.

To escape the FLOW function, press ON / OFF / ESC.

3.4 Making an air flow calculation with the C.A 825 cone

This function is available only if you possess an air flow

measurement cone C.A 825. Otherwise refer to paragraph 3.3

Making air flow calculation

Press SELECT to enter the menu.

Scroll down the menu with SELECT.

When C.A 825 CONE appears, enter with OK.

The air flow is immediately displayed.

For a measurement in supply, insert the vane in the cone with

the arrow (on the top of the vane) turned toward the outside of

the cone.

For a measurement in exhaust, insert the vane in the cone with

the arrow turned toward the inside of the cone.

3.5 Minimum and maximum values

For air velocity, press MIN / MAX one time to display the values

min "m" and max "M".

Press a second time to display the values for temperature.

To escape this function, press ON / OFF / ESC.

3.6 Freezing the measurement

To freeze the measurement on the screen, press HOLD.

To escape, press HOLD again.

4. SPECIFICATIONS

Metrological specifications

Measurement range Resolution Accuracy Measurement units

Air velocity 0.20 to 3 m/s

3.1 to 35 m/s 0.01 m/s

0.1 m/s ± 3% R + 0.1 m/s

± 3% R + 0.2 m/s m/s , fpm

Ambient

temperature -20 to +80°C 0.1°C ± 2% R + 0.2 °C °C, °F, K

Air flow 0 to 65 000 m3/h 1 m3/h ± 3% R + 10 m3/h m3/h, m3/s, L/s, cfm

Technical features

Conditions of use: 0 to 50°C; < 85 %RH

neutral gas

Storage conditions: 0 to 50°C; 15 to 85 %RH

Power supply: 1 alkaline battery, 9V 6LR6

Device shuts off automatically after 30 minutes

Dimensions and weight

Instrument: 145 x 75 x 34 mm

Cable: L = 450 mm, extension up to 2.4 m

Probe: Ø = 100 mm, L = 310 mm

Display: 2 lines of 12 characters

38 x 12 mm

Weight: 190 g

Conformity

Electromagnetic Compatibility: complies with NF EN 61326-1.

5.MAINTENANCE

5.1 Cleaning

Clean the casing with a cloth and a little soapy water.

Clean off with a damp cloth.

5.2 Changing battery

- Remove the protective covering

- Remove the battery cover

- Insert a 9V battery

- Replace the battery cover

- Replace the protective covering

5.3 Metrologic verification

It is essential that all measuring instruments are regularly

calibrated.

For checking and calibration of your instrument, please contact

our accredited laboratories (list on request) or the CHAUVIN

ARNOUX subsidiary or your local agent.

5.4. Repairs

■■

■Repairs under guarantee and outside guarantee.

Please return the product to your distributor.

6. TO ORDER

C.A 824 ................................................................P 01.1731.03

Accessories:

Telescopic extension ..........................................P 01.1020.12

Air flow measurement cone C.A 825 ..................P 01.1731.05

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