Technical Data - TESTO 445 Instruction Manual

testo 645/445
General technical data
Memory space:
Battery / rechargeable batt.
Power supply:
Alternative:
Typical
battery
lifetimes:
Operating
temperature:
Storage
temperature: -20 to +70 °C
Approx. 255 g incl. batteries
Weight:
Other features - Automatic recognition of
- RS232 interface for
Temperature measurement
Type K (NiCr-Ni)
Measuring range:-200 to +1370 °C
Accuracy*
at 22 °C:
Additional error over
operating
temperature range: ±0.2 °C
Resolution:
Up to 3000 readings
12 V mains unit
Battery recharging in instr.
Temperature/humidity
probes, pressure probes,
vane probes:
30 to 45 h
Thermal probes,
CO2 probes, 3-function
probe:
>3 - 12 h
Reduce the hour times by
a factor of 5 if a 9V battery
is used.
0 to +50 °C
all connected probes
data management
(electrically isolated)
±0.3 °C or ±0.5 % of
reading
(the larger value applies)
0.1 °C
Technical data - Instruments
Type J (FeCu-Ni)
Measuring range:-200 to +1000 °C
Accuracy*
at 22 °C:
Additional error
over operating
temperature range: ±0.2 °C
Resolution:
The following can also be connected:
thermocouple:
NTC
Measuring range:-50 to +150 °C
Accuracy*:
Resolution:
Humidity measurement
Temperature:
Measuring range:0 to 100 %RH
Resolution:
System
accuracy*:
Calc. humidity
parameters:
34
testo 645/445
±0.3 °C or ±0.5 % of
reading
(the larger value applies)
0.1 °C
Type S (Pt Rh-Pt)
±0.2 °C (-25 to +74.9 °C)
±0.4 °C (-50 to -25.1 °C/
+75 to +99.9 °C)
±0.5 % of reading
(+100 to +150 °C)
0.1 °C
-20 to +180 °C
0.1 %RH
Up to 1.0 %RH
(see probe data)
td, g/m , g/kg, J/g
3
(pressure-compensated)