TESTO 835 - Technical Data

4. Technical data
Feature Values
Infrared measurement
Lens 50:1 + opening diameter of the sensor (24 mm /0.95”)
Spectral range 8 to 14 μm
Laser type 4point laser
Output / wavelength < 1 mW / 8 to 14 μm
Class / standard 2 / EN 608251:2007
Measuring range T1 / H1: 30 to +600 °C / 22 to +1112 °F
T2: 10 to +1500 °C / 14 to +2732 °F
Resolution 0.1°C/°F
Accuracy T1 / H1: ±2.5 °C / ±4.5 °F (30.0 to 20.1 °C / 22.0 to 4.1 °F)
(at +23 °C / 73.4 °F, ±1.5 °C / ±2.7 °F(20.0 to 0.1 °C / 4.0 to 31.8 °F)
±1 digit) ±1.0 °C/ ±1.8 °F (0.0 to +99.9 °C / 32.0 to +211.9 °F)
±1 % of the measuring value (remaining range)
T2: ±2.0 °C / ±3.6 °F or ±1 % of the measuring value
(the higher value applies)
Measuring rate 0.5 s
Contact measurement
Sensor type Thermocouple type K (connectable)
Measuring range T1 / H1: 50 to +600 °C / 58 to +1112 °F
T2: 50 to +1000 °C/ 58 to +1832 °F
Resolution 0.1 °C/°F
Accuracy (±1 digit) ± (0.5 °C / 0.9 °F + 0.5 % of the measuring value)
Measuring rate 0.5 s
Humidity measurement (only H1)
Measuring range 0 to 100 % RH (at 20 to +50 °C) / 4 to +122 °F)
Resolution 0.1 %RH (humidity)
0.1 °C/°F (temperature)
0.1 °C td/°F td (dew point temperature)
Accuracy (±1 digit) ± 2 %RH
± 0.5 °C/ 0.9 °F
Measuring rate 0.5 s
General
Operating temperature 20 to +50 °C / 4 to 122 °F
Transportation/storage
temperature 30 to +50 °C / 22.0 to 122 °F
Voltage supply 3 x battery type AA or via USB port (only in conjunction with EasyClimate software)
Battery life 25 h (typical at 25 °C / 77 °F without laser and display illumination)
10 h (typical at 25 °C / 77 °F without display illumination)
Housing ABS/PC
Dimensions 193 x 166 x 63 mm / 7.6 x 6.5 x 2.5”
Weight T1 / T2: 514 g / 1.13 lbs (incl. batteries)
H2: 527 g / 1.16 lbs (incl. batteries)
EC Directive 2004/108/EC
Warranty 2 years, warranty terms: see www.testo.com/warranty
14 4. Techical data