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1. General Information
Please read this document through carefully and familiarise yourself with the operation of the product before putting it to use. Keep this documentation to hand so that you can refer to it when necessary.
2. Product Description
Instruction manual en
testo 805
Infrared thermometer
3. Safety Information
Avoid electrical hazards:
Please adhere to the required safe distance when measuring
on live parts!
Preserving product safety/warranty claims:
Operate the instrument properly and according to its intended
purpose and within the parameters specifed. Do not use force.
Do not expose to electromagnetic radiation (e.g. microwaves,
induction heating systems), static charge, heat or extreme
fluctuations in temperature.
Do not store together with solvents (e.g. acetone).
Open the instrument only when this is expressly described in
the documentation for maintenance purposes.
Ensure correct disposal:
Dispose of defective rechargeable batteries and spent
batteries at the collection points provided.
Send the instrument directly to us at the end of its life cycle.
We will ensure that it is disposed of in an environmentally
friendly manner.
4. Intended Purpose
testo 805 is a compact infrared thermometer for non-contact
measurement of surface temperatures.
Not ssuitable ffor ddiagnostic mmeasurements iin tthe mmedical
sector.
Infrared
sensor
Select
mode
Battery
compartment
(rear side)
Display
On switch/
activates
measurement
TopSafe
(protection
for thermometer)
5. Technical Data
Feature Values
Measurement range -25 to +250°C
Resolution 0.1°C at -9.9 to +199.9°C, 1°C in the remaining range
Accuracy ±3°C at -25 to -21°C
±2°C at -20 to -2.1°C
±1°C at -2.0 to +40.0°C
±1.5°C at +40.1 to +150.0°C
±2% of reading at +150.1 to +250°C
Response time <1s
Emissivity 0.95 fixed
Optics 1 : 1* (Distance : Spot)
Working temperature ±0 to +50°C
Transport/Storage temperature -20 to +65°C
Power 1 x round cell type CR2032
Battery life 40h (typically)
Housing ABS, PMMA
Protection class With TopSafe: IP67
Dimensions 80 x 31 x 19mm (without TopSafe)
CE guideline 89/336/EEC
Warranty 2 years
* + Opening diameter of sensor (6mm).
6. Initial Operation
1
Open battery compartment: Turn cover in an anti-clockwise
direction.
2
Remove the battery interrupt strip.
3
Close battery compartment: Turn cover in a clockwise
direction.
- The instrument is ready to operate.
7. Operation
7.1 Switching On/Off
Switch on instrument: .
- Battery symbol and set temperature unit light up.
The thermometer switches off automatically after approx. 15s
if the buttons are not activated.
7.2 Measuring
Take note of information on infrared measurement.
Instrument is switched on.
Carrying out spot measurement
Locate object to be measured and activate measurement: .
- The reading is displayed.
Carrying out scan measurement
Locate object to be measured and activate scan: Keep
pressed.
- The scan measurement will run for as long as is kept
pressed (1 measurement per second).
Carrying out minimum value scan measurement
1
Activate MIN mode: --> .
-
MIN
lights up.
2
Locate object to be measured and activate scan: Keep
pressed.
- The scan measurement will run for as long as is kept
pressed (1 measurement per second). The lowest reading
from the scan measurement is shown.
3
Deactivate MIN mode: .
Carrying out maximum value scan measurement
1
Activate MAX mode: 2 x --> .
-
MAX
lights up.
2
Locate object being measured and activate scan: keep
pressed.
- The scan measurement will run for as long as the button is
kept pressed (1 measurement per second). The highest reading from the scan measurement is shown.
3
Deactivate MAX mdoe: .
Carrying out automatic scan measurement
1
Activate LOCK mode: 3 x --> .
-
LOCK
lights up. The automatic scan measurement starts auto-
matically (1 measurement per s).
2
Deactivate LOCK mode: .
Automatic switch off of the instrument is deactivated in the
LOCK mode.
7.3 Changing the temperature unit
Instrument is switched on.
1
Activate setting mode: 4 x .
- The temperature unit set flashes.
2
Change temperature unit: .
8. Service and Maintenance
8.1 Changing the Battery
1
Open battery compartment: Turn cover in an anti-clockwise
direction.
2
Remove empty battery and insert new battery (Type CR2032)
such that the (+) symbol is visible.
3
Close battery compartment: Turn cover in clockwise direction.
8.2 Cleaning the Instrument
Do not use abrasive cleaning agents or solutions.
Rub down the housing with a damp cloth. TopSafe can be
cleaned in the dishwasher.
Clean the sensor stop and the sensor area carefully with
cotton buds dipped in water or medical alcohol.
9. Questions and Answers
Query Possible causes Possible solution
Battery almost empty, Keep spare battery
remaining power: approx. 10h. ready.
(flashes) Battery empty. Change battery.
Instrument cannot be Battery empty. Change battery.
switched on
or Temperature of object being -
measured is outside the
measurement range.
Large fluctuations in ambient temperature.
Ambient temperature outside working range.
+ other digits Various. Remove battery for
approx. 1 min and
reinsert.
If message comes again:
Contact your local dealer
or Testo´s Customer
Service.
10. Information on Infrared
Measurement
10.1 Measurement Method
Infrared measurement is an optical measurement
Keep sensor stop and sensor area clean.
Do not measure if sensor area is clouded.
Keep measurement field (area between instrument and object
being measured) free of interferences: no dust or dirt particles,
no moisture (rain, steam) or gases.
Infrared measurement is a surface measurement
If there is dirt, dust, frost etc. on the surface, only the top layer will
be measured, i.e. the dirt.
In the case of shrinkwrapped foodstuffs, do not measure in air
pockets.
If values are critical, always subsequently measure using a
contact thermometer. Particularly in the food sector, the core
temperature should be measured with the penetration/immersion thermometer.
10.2 Emissivity
Materials have different emissivities, i.e. they emit different levels
of electromagnetic radiation. The emissivity of testo 805 is fixed at
0.95. This is the ideal value for measuring non-metals, plastics
and food (paper, ceramics, plaster, wood, colours and varnishes).
Bright metals and metal oxides are only suited to a limited extent
to infrared measurement on account of their low or nonuniform
emissivity.
Apply emissivity increasing coatings such as varnish or emissivity adhesive tape (Type No. 0554 0051) to the object being
measured. If this is not possible: measure with a contact thermometer.
10.3 Measurement spot, Distance
A specific spot is determined depending on the distance from the
measuring instrument to the object being measured. testo 805
has an optical resolution of 1 : 1. The diameter of the spot is as
large as the measurement distance + the diameter of the sensor
opening (6mm).
Examples:
Measuring distance Spot diameter
1cm 1 + 0.6cm = 1.6cm
10cm 10 + 0.6cm = 10.6cm
20cm 20 + 0.6cm = 20.6cm
99 Washington Street
Melrose, MA 02176
Phone 781-665-1400
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com
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