Testo 535 Operating Manual
testo 535
Instruction manual
en
2 line display
Hold/Max/Min
MEAN button
START/STOP
ON/OFF
button
Screw-off
battery
compartment
PRINT button
The conformity certificate
confirms that this product
fulfills the guidelines in accordance with 2004/108/EEC.
Please read prior to operation
- Never measure on live parts
- Observe sensor measuring ranges!
Overheating may destroy probes.
- Observe storage and transport temperature as
well as the max. operating temperature
(e.g. protect measuring instrument from direct
sunlight).
- Inexpert handling or use of force cancel your
warranty claims!
- If there is a change in the ambient temperature
(change of location, e.g. inner/outer
temperature) the measuring instrument will
need an adaptation phase of several minutes.
- The CO2 probe contains optical components.
Please treat the probe like your camera.
Strong vibrationa may chenge the manufacturer´s calibration. Check the readings in
fresh air: 350 to 450 ppm. It is recommended
that the instrument is sent to a Testo service
point for adjustment purpose.
- The CO2 probe is permanently attached to
the measuring instrument. Probes can only be
changed at Testo service points.
- Ensure the probe does not come into frequent
contact with water otherwise the long-term
stability will be affected.
- If the level of high frequency is high, there may
be deviation from the required
Operation
Switch on instrument. After the
instrument is switched on a short
the sensor has a warm-up phase of approx. 30
s. The instrument is then ready to operate. The
CO2 concentration in the sensor needs approx.
1 minute to adapt to ambient conditions. This
adaptation time can be shortened by swinging
the probe gently back and forth. If the probe is
subjected to condensation, this can lead to
uncreased mesured values.
display and function test follows and
Mains connection (mains unit no. 0554.0088)
recommended for long-term measuring.
The probe should be held as far as
possible from your body so as to
eliminate the influences caused by the
CO2 in your breath.
Auto-Off function
If the Auto-Off function is activated
the instrument switches itself off automatically after 10 minutes of inactivity
(except in the case of HOLD) and
timed mean calculation.
Changing the battery
If“Bat“ appears in the display, the
battery will last approx. 1 hour
out of a total lifetime of 4 hours, if
referring to an alkali-manganese
off automatically if there is not enough power.
Unscrew the battery compartment, remove
the used battery and put in new battery, type
9V (IEC 6 F 22). (Observe polarisation). User
settings remain intact if the instrument is not
longer than 3 minutes without power.
battery. The instrument will switch
Instructions for disposal:
Only empty batteries should be disposed. The
batteries should be placed in plastic bags to
prevent short-circuits.
Technical data - testo 535
Sensor: 2 channel infrared
absorption principle
Measuring range: 0 to 9,999 ppm CO2
(0 to 0,999 vol.% CO2)
Accuracy: 0 to 5000 ppm:
(at 23 °C *) ± (75 ppm +3 % of m.v.)
5000 to 9,999 ppm:
±(150 ppm +5 % of m.v.)
Resolution: 1 ppm or 0.001 vol.%
Ambient
temperature: 0 to +50°C
Storage temp.: -20 to +50 °C
Battery lifetime: >4h (9 V block, Al-Mn)
Switchover: ppm / vol. %
Display: LCD (11 mm digit height)
Housing: ABS
Dimensions: 190 x 57 x 42 mm
Weight: Approx. 300 g
Ambient humidity: 0 to 99 %RH
not subjected to
condensation
Warranty
testo 535 meas. instr. ...............2 years
Probe .........................................1 year
2
* Temp. coefficient: ± (1 ppm + 0,4 % of meas.) / °C
Changing the settings - Configuration
“START/STOP” button: keep pressed when switching on.
The following settings can be changed:
Date
▲
Auto OFF
not activated
Auto ON
Auto-OFF
function
activated
▲
Auto-OFF
function
▲
▲
BAT
Battery in
instrument
▲
ACCU
Rechargeable
battery in inst-
rument
▲
01:01
1998
01:01
1998
▲
▲
Next
position
Set value
Pressure compensation
Please note that the CO2 reading depends on the absolute air pressure.
This effect is compensated in the instrument. To do this, enter the correct air pressure (See
Changing the settings - Configuration). The air pressure depends on the height of the location above
mean sea level (See the “Barometric height formula” table on the next page) and weather influences.
Example:
You are located at a height of 800 m above sea level where you have a mean annual air pressure of
920 hPa. According to the barometer (1003 hPa) and the height correction of the barometer (to 1013
hPa) the mean annual air pressure has to be reduced by 10 (910 hPa air pressure).
▲
Time
00:00
00:00
▲
Next
position
Set value
Air pressure
▲
ppm
▲
Vol%
▲
1013
hPa
Next
position
Meas-
1013
hPa
▲
▲
uring
mode
Set value
▲
Memory function for current, maximum and minimum values
The following displays appear when this button is pressed again and again:
1st press: HOLD - Readings are frozen in display
2nd press: MAX - Displays saved max. values
3rd press: MIN - Displays saved min. values
4th press: MEAN - Multi-point mean calculation
5th press: MEAN - Timed mean calculation
6th press: MEAN- Return to measuring mode
Important note:
The min/max values are measured from the time the instrument is switched on. The values are reset if
the instrument is switched off and then on again.
Printout
A printout of the reading with date and time can be activated by pressing the PRINT button.
The max, min and mean values also appear on the printout of a multi-point or timed mean calculation. If a reading was frozen at a certain point in the display via the HOLD button, this reading appears in the printout with the time and date when the reading was frozen.
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