GeoPrecision ML5WR10 Wireless Datalogger Family User Manual log hc2

GeoPrecision GmbH Wireless Datalogger Family log hc2

Contents

Manual__log_hc2_v2

LOG-HC2 Wireless Temperature/Humidity Data Logger for
Rotronic AG Hydroclip HC2
Handling
The logger consists of the electronics (housing model dependent: Stainless Steel or Plastic,
20x160 mm) and the HydroClip2 HC2 sensor (very high precision sensor, integrated or
separate cable) from Rotronic AG. The sensor head can be replaced, different variants are
available.
Please note: The HC2 sensor is not included, because
different versions exist.
Important: The sensor is protected against dust and
can withstand condensed water, but should not be
exposed to liquid water.
If the enclosure must be opened (e.g. for battery
replacement), please check the o-ring (sealing) very carefully! Use lubricant (to protect the
o-ring) before reassembling.
We recommend to lubricate the enclosure additionally after reassembling and before using in
the field (e.g. by Spray Vaseline). Please ensure, that no force affects the connector
sensor<->logger in the field.
About the range: Optimal range (line of sight in open environment) could be up to 300 meters
for loggers with separate antennas. If the sensor cable (if applicable) is used as antenna, a
range of 100 meters is realistic, for plastic housings with internal antenna, 30 meters are
realistic. In the 2nd case the first 20 cm of the sensor cable are mostly important for the
transmission. On request, special beam antennas with very high gain are available from us.
Please note: The devices are available with several different radio frequencies, depending on
the local regulations of the country (e.g.: 433 MHz in Europe, parts of Africa and Asia, 905
MHz in USA and Canada, ...). It is in the responsibility of the user, not to use devices that are
not allowed in the country of usage.
Technical Shortform LOG-HC2 Wireless Temperature/Humidity Data Logger 15.07.2013
Don't expose
the sensor to
liquid water.
Technical Data
Logger: Temperature range: -40°C to +85°C. Radio transmission frequency: a) EC,
parts of Africa and Asia): 433.92 MHz (harmonised frequency for license free
operation within the EC, Switzerland, Norway, Iceland. (for other countries
please check the local regulations. b) USA/Canada: 905 MHz. Effective
emitted energy < 5mW
Memory: 512-2048kB (non volatile) Flash memory. Up to 100.000-400.000 measures: 1
measure typically uses 5.5 Bytes per value (Software Version 1.1, will be
reduced to 2-3 Bytes in a following revision). Each HK-record (time stamp
and optional HK-data) typically requires another 6 to 9 bytes. Since HK-values
are recorded only after a selectable number of measures, (factory default is 6).
Example: 24 measures, 2 values per day require 24*5.5*2 = 264 Bytes.
Additionally 4 HK-records require additional 4 * 6..9 = 36 Bytes. Sum: ca.
300 Bytes per day. Conclusion: 2048kB will be good for (theoretically) ca. 20
years without clearing the memory. The memory has a duty cycle of >100 000
clearing cycles.
HK-data: Internally the battery voltage and internal temperature can be recorded. The
internal temperature is only calibrated on demand. Calibrated accuracy is +/-
1°C in the range -20°C to +40°C. The battery voltage is measured with a
resolution of 1 mV.
Sensor: Any type of HygroClip2 (replaceable and calibrated) from ROTRONIC AG
(www.rotronic.de). The sensor range is 0-100% rH and -50°C to +100°C. For
the accuracies and extended temperature ranges contact ROTRONIC (please
note: the logger itself is only designed for temperatures from -40°C to +60°C
(+85°C for short times)). Optionally the sensor can be connected in 4-wire
technology. Sensor cables are possible from 20 cm to 1 meter.
Battery: SB-AA11 from www.vitzrocell.com :
3.6 Volt Lithium (Li-SoCl2), 2400mAh.
Max. Pulse load: <20 mA
Size: AA with solder terminal
Low self discharge rate (less than 1% after 1 year of storage at +20°C)
Non flammable
Non restricted for transport
The battery can be replaced by the user. Similar types of battery are available
from all major battery production companies.
About the battery voltage: The voltage is around 3.4-3.6 V at 20°C, but „drops
down“ to 3.1-3.3°C at -40°C. The battery voltage does not significantly
reflect the remaining power of the battery, the „temperature drops“ show this
better, as described below.
Technical Shortform LOG-HC2 Wireless Temperature/Humidity Data Logger 15.07.2013
Calculation the battery capacity
4 main factors impact the battery capacity/lifetime:
Constant load: about 10µA for the current version Mode „Sleeping“ with
periodically checking the radio. So 1 mAh is good for ca. 100 hours of „Sleeping“
Pulse load: about 10mA for 1.7 seconds per measure, so 1 mAh is good for
ca. 210 measures
Self discharge: about 10% after 10 years
Temperature cycles: difficult to predict, could be up to 50% (worst case) for
harsh environments like high mountain sites.
As a rough estimation: Theoretically 2400 mAh are good for >25 years of „Sleeping“ or >
500000 measures (this is almost 60 years for 1 measure per hour), if no self discharge is
assumed. Practically we normally calculate only with 1/3 of the capacity (the rest is for
spare): For 1 measure per hour each year requires in total 130 mAh (42 mAh for the
measures and 88mAh for „Sleeping“), with the rest of 2400 mAh / 3 = 800 mAh still more
than 6 years of operation should be possible. Hence we would recommend to replace the
battery with these settings after 5 years or later, if „temperature drops“ for cold phases rises
significantly.
Compliance informations (only for USA/Canada):
a) User Information according to FCC 15.21:
Changes or modifications not expressly approved by the party responsible for compliance could void the user’s
authority to operate the equipment.
b) Part 15 Statement according FCC 15.19/RSS Gen Issue 3 Sect. 7.1.3
This device complies with Part 15 of the FCC Rules and with Industry Canada license-exempt RSS standard(s).
Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2)
this device must accept any interference received, including interference that may cause undesired operation.
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de
licence. L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de
brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le
brouillage est susceptible d'en compromettre le fonctionnement.
LOG-HC2: FCC-ID: 2AAREHC2R10 / IC Certification No IC: 11303A-HC2R10
(Label assembled over battery screw cap)
Technical Shortform LOG-HC2 Wireless Temperature/Humidity Data Logger 15.07.2013
Model: LOG-HC2
FCC-ID: 2AAREHC2R10
IC: 11303A-HC2R10
1cm
2.54cm
.
Model: LOG-HC2
FCC-ID: 2AAREML5WR10
IC: 11303A-ML5WR10
FCC-ID: 2AAREML5WR10 / IC Certification No IC: 11303A-ML5WR10

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