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
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 CO2probe contains optical components.
Please treat the probe like your camera.
Strong vibrationa may chenge the manufac-
turer´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 CO2probe 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
2 line display
Mains connection (mains unit no. 0554.0088)
recommended for long-term measuring.
Hold/Max/Min
MEAN button
START/STOP
ON/OFF
button
PRINT button
Screw-off
battery
compartment
Operation
Switch on instrument. After the
instrument is switched on a short
display and function test follows and
the sensor has a warm-up phase of approx. 30
s. The instrument is then ready to operate. The
CO2concentration 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.
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
battery. The instrument will switch
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.
If the Auto-Off function is activated
the instrument switches itself off auto-
matically after 10 minutes of inactivity
(except in the case of HOLD) and
timed mean calculation.
The probe should be held as far as
possible from your body so as to
eliminate the influences caused by the
CO2in your breath.
Auto-Off function
Warranty
testo 535 meas. instr................2 years
Probe.........................................1 year
The conformity certificate
confirms that this product
fulfills the guidelines in accor-
dance with 2004/108/EEC.
2
Instructions for disposal:
Only empty batteries should be disposed. The
batteries should be placed in plastic bags to
prevent short-circuits.
* Temp. coefficient: ± (1 ppm + 0,4 % of meas.) / °C