Chauvin Arnoux C.A 846 User manual

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C.A 846
■Thermo-hygromètre
■Thermo-hygrometer
■Thermo-Hygrometer
■Termo-igrometro
■Termohigrómetro
FRANÇAIS
ENGLISH
DEUTSCH
ITALIANO
ESPANOL
Notice de fonctionnement
User's manual
Bedienungsanleitung
Libretto d’Istruzioni
Manual de Instrucciones

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Meaning of the symbol
Warning ! Please refer to the User’s Manual before
using the instrument.In this User’s Manual, the
instructions preceded by the above symbol, should they
not be carried out as shown, can result in a physical
accident or dammage the instrument and the installations.
Thank you for purchasing this C.A. 846 pocket thermo-
hygrometer.
To get the best service from this instrument:
■read this user’s manual carefully,
■respect the safety precautions detailed
PRECAUTIONS FOR USE
■If the instrument is subjected to strong ambient temperature
variations, wait 20 minutes after stabilization before
resuming measurement.
■Comply with the environmental conditions (see § 4)
■Never take measurements in atmospheres polluted by
solvents, acetone for example, as this may damage the
sensor.
WARRANTY
Our guarantee is applicable for twelve months after the date
on which the equipment is made available (extract from our
General Conditions of Sale, available on request).
CONTENTS
1. PRESENTATION .................................................................8
2. DESCRIPTION ....................................................................8
3. USE .....................................................................................8
4. SPECIFICATIONS ..............................................................9
5. MAINTENANCE ............................................................... 10
6. TOORDER ....................................................................... 10
7. APPENDIX ....................................................................... 23
English

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1.PRESENTATION
The C.A. 846 pocket thermo-hygrometer is a highly
accurate instrument for measuring ambient temperature and
hygrometry; it is light with a digital display and is extremely
easy to use. It has a PT 1000 temperature sensor and a fast-
response, capacitive humidity sensor.
2.DESCRIPTION
See § 7. Attachment (at the end of this user’s manual)
➀Ambient temperature and hygrometry sensors
➁Backlit liquid crystal display
- Main display:
± numeric value of the temperature
numeric value of relative humidity
in 3½ digits or OL error code
- Symbols:
Low battery
Last value measured
MAX Maximum value of the temperature or hygrometry
°C/°F Value of unit displayed
%RH Relative humidity ratio (hygrometry)
➂Pushbutton control :
- short press: activates/deactivates backlighting
- long press: selects the measurement unit °C / °F
➃Holds last measurement displayed
➄3-way switch:
-OFF : Switches the instrument off
-°C/°F : Temperature measurement
- %RH : Relative humidity measurement
➅Maximum value of the temperature or hygrometry
3. USE
It's necessary to remove the saturation of the sensor
before to do hygrometry measurements.
3.1 Procedure
1. Unscrew the protective cover from the sensor.
2. To switch the instrument on: select the type of measurement
with switch ➄, the measurement is displayed.
For temperature measurements, the unit displayed is the
one which was in use before the instrument was switched
off. This unit can be changed by a long press on ➂.

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For hygrometry measurements, wait until the display is
stabilized.
The backlighting of the display can be switched on with a
short press on ➂.
Note: If there is a sharp change in temperature, wait until
the display is stabilized.
3. Configure the instrument according to the type of
measurement to be taken using special function keys ➃or
➅(see § 2 and 3.2).
4. Note the value measured.
The instrument is switched off by returning the cursor of switch
➄to the OFF position. Screw the protective cover of the sensor
back on after use.
Note: If the temperature measured is outside the measurement
range, the instrument will display OL.
3.2 Special functions (see § 2. Description)
HOLD: when you press on ➃, the instrument displays the last
value measured, this value is not kept in memory when
the instrument is switched off
MAX: when you press on ➅, the instrument will display the
maximum temperature or hygrometry value until the
instrument is switched off or the key is pressed again.
4. SPECIFICATIONS
■■
■■
■Sensor
- Temperature: Pt 1000 Ω
- Relative humidity: Capacitive
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■■
■Measuring range
- Temperature: -20°C to +60°C (-4°F to 212°F)
- Relative humidity: 0% to 100% HR
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■■
■Resolution:
- Temperature: 0.1°C/°F
- Relative humidity: 0.1% RH
■■
■■
■Polarity indication: automatic
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■■
■Accuracy
- Temperature:
± 0.5°C 0°C to +50°C
±1°C from -20°C to 0°C and from 50°C to 100°C
±1°F from +32°F to +122°F
± 2°F from -4°F to +32°F and from +122°F to +212°F
- Relative humidity:
±7.5% to 25°C, from 10% to 90% RH.
±10% to 25°C, from 0% to 10% RH and from 90% to 100%

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■■
■■
■Temperature drift
0.1 x accuracy by °C from 0 to +18°C and from +28 to +50°C
(+32 to +64°F and +82 to +122°F)
■■
■■
■Climatic environment
- Utilisation: 0 to +50°C <75% RH
- Storage: -20°C to +60°C, 0 to 80% RH, without battery
■■
■■
■Power supply: 9 V battery (type 6LR61 or 6LF22)
■■
■■
■Dimensions / Weight
173 x 60.5 x 38 mm / 190 g with batteries
■Electromagnetic compatibility
Emission as per EN 50081- Ed.. 1992
Emission as per EN 50082- Ed. 1992
5.MAINTENANCE
For maintenance, use only specified spare parts. The
manufacturer will not be held responsible for any
accident occuring following a repair done other than
by its After Sales Service or approved repairers.
5.1 Upkeep
5.1.1 Changing the battery
■Put the switch in the OFF position
■Remove the cover at the back of the instrument
■Replace the old battery with a 9 V battery (6LR61 or 6LF22)
5.2 Cleaning the housing
Clean the unit with a cloth and a little soapy water. Clean off
with a damp cloth.
Do not use solvents.
5.3 Metrological Checks
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 Agent in your country.
5.4 Repairs
Repairs under or out of guarantee: please return the product to
your distributor.
6.TOORDER
C.A 846 ..............................................................P01.1563.01Z
Comes with shock-proof surround, 9 V battery and these
operating instructions.
Spare parts:
Battery .................................................................. P01.1007.32