- 46 -
TAB. 8.7.1: memory capacity of data loggers in indoor use housing
Models
Number of storable
samples
Notes
HD35EDN/1TC, HD35ED7P/1TC, HD35EDNTV, HD35ED1TV,
HD35ED1TVI, HD35ED4r…,
HD35EDH with only one input used (not as counter)
74,000
HD35EDN/2TC, HD35ED7P/2TC
HD35EDH with only one input used as counter
HD35EDH with two inputs used (not as counter)
56,000
HD35EDN/3TC, HD35ED7P/3TC
HD35EDH with two inputs used, one as counter
HD35EDH with three inputs used (not as counter)
44,000
HD35ED1NB
44.000 (1)
HD35EDH with three inputs used, one as counter
36,000
HD35ED1NAB, HD35ED14bNITV, HD35ED14bNITCV
36,000
(1)
HD35ED14bNAB, HD35ED1NIUTV, HD35ED1NIUTCV
32,000
(1),(2)
HD35ED14bNIUTV, HD35ED14bNIUTCV
28,000
(1),(2)
HD35ED1NTC, HD35ED17PTC, HD35ED1NTV, HD35ED1NTVI
22,000
(1)
HD35ED1N/2TC, HD35ED1NITV, HD35ED1NITCV, HD35ED14bNTC,
HD35ED14bNTVI, HD35ED14bNTV, HD35ED1N4r…TV
20,000 (1)
Note 1:
They store
also 5 calculated humidity quantities: dew point temperature, wet bulb
temperature, absolute humidity, mixing ratio, partial vapor pressure.
Note 2: Models measuring illuminance and UVA irradiance store also the
proportion of UV
present (µW/lumen)
.
A sample consists of all the quantities measured and calculated by the data logger at the same
acquisition time. For example, HD35ED1NAB model detects four quantities and calculates five
(derived humidity quantities) and a sample includes a temperature measurement, a CO meas-
urement, a CO
2
measurement and six humidity measurements (the relative humidity measure-
ment plus the five derived quantities).
TAB. 8.7.2: measurement characteristics
(instrument in line with sensor)
For all data logger models except versions with terminal header inputs
Temperature - NTC10K Sensor
For …N…TC and …TV versions
Sensor
NTC 10 k
Ω
@ 25 °C
Measuring range
-40…+105 °C
Resolution (instrument)
0.1
°C
Accuracy ±
0.3
°C in the range 0…+70
°C / ±
0.4
°C outside
Stability 0.1
°C/year
Temperature – Sensor integrated in RH module
For …TVI versions and HD35ED1NB, HD35EDG1NB, HD35ED1NAB, HD35EDG1NAB, HD35ED14bNAB,
HD35EDG14bNAB models
Sensor
Sensor integrated in humidity module
Measuring range
-40…+105 °C
Resolution (instrument)
0.1
°C
Accuracy ±
0.2 °C in the range 0…+60 °C
±
(0.2 – 0.05 * T)
°C in the range T=-40…0 °C
±
[0.2 + 0.032 * (T-60)]
°C in the range T=+60…+105
°C
Stability 0.05
°C/year
