11. Technical data
32
11.5 testo 177-H1
Parameter........................Humidity (%RH) / Temperature (°C/°F) /
......................................................................Dew point (td°C/td°F)
Sensor ......................................Humidity sensor / NTC (internal) /
................................................................................NTC (external)
Number of measuring channels ......4 (3 x internal: %RH, °C/°F,
..........................................................td°C/td°F, 1 x external: °C/°F)
Measuring range ......................................................0 to 100%RH
....................................................................-20 to +70 °C (internal)
................................................................-40 to +120 °C (external)
................................................................................-40 to +70 td°C
Accuracy, internal ..............±2 %RH at rated temperature +25°C
(System) ....................................................±0.5 °C (-25 to +70 °C)
............................................................................................± 1 digit
Accuracy, external....................................±0.2 °C (-25 to +70 °C)
(only Logger) ................................±0.4 °C in the remaining range
............................................................................................± 1 digit
Resolution ............................................0.1%RH / 0.1°C / 0.1td°C
Measuring rate ................................2 s to 24 h (freely selectable)
Storage temperature................................................-40 to +85 °C
Operating temperature ............................................-20 to +70 °C
Display ........................................................................LCD, 2 lines
Operating temperature/Display ..............................-20 to +65 °C
Memory capacity ................................................48,000 readings
Housing ..........................................................................ABS/TPE
Protection class ....................................................................IP 54
Dimensions in mm (lxwxh) ..........103 x 64 x 33 (without probe)
..............................................................160 x 64 x 33 (with probe)
Weight ....................................................................................130g
Battery ....................................................................Lithium (1 AA)
Battery life............................................................Typical: 5 years*
....(Measuring rate: 15 Min., Operating temperature: -10 to +50°C,
......................................Display: On, Status led (green LED): Off)
* See Chapter 11.6 Battery life, P. 33
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