LF101A -- Leaf Wetness Data Logging System

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Category: DATA LOGGER

Model: Other

Avaibility: AVAILABLE

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Datasheet

Description
Specification

The LF101A is a complete data logging system that accurately measures and records leaf wetness. Not only does it record the presence of water but also logs the amount of water on the sensor. The sensor responds to environments the same way a real leaf does and can also detect when ice is present. This low cost system comes complete with a data logger, weatherproof enclosure and leaf wetness sensor.The LF101A is ideal for plant disease forecasting, irrigation studies and monitoring frost cycles. It features a multiple start/stop function, ultra-high speed download capability, 1 million reading storage capacity, optional memory wrap, battery life indicator, optional password protection, programmable alarms and more. An IFC200 interface cable and software is required for use with the LF101A. The device can be started and stopped directly from a computer using the MadgeTech Software

Measurement Range	Dry: 266 mV typical 100% Saturated: 833 mV typical
Resolution	50 ?V
Accuracy	±0.1 mV
Speciefed Accuracy	Nominal range @ 25 ºC
Input Connection	6-position removable screw terminal
Reference Output	2.5 VDC, 2.5 mA (1 k?) maximum load
Temperature Effect On Span	< 25 ?V over -40 ºC to +80 ºC
Temperature Effect On Offset	< 25 ?V over -40 ºC to +80 ºC
Prob Measurement Time	10 ms
Probe Power	2.5 VDC @2 mA to 5 VDC @ 7 mA
Reading Rate	5 4Hz to 1 every 24 hours
Memory	1,000,000 readings; software configurable memory wrap 330,000 readings in multiple start/stop
Wrap Around	Yes
Start Modes	Immediate start Delay start up to 24 months Multiple pushbutton start/stop
Stop Modes	Manual through software Timed (specific date and time)
Multiple Star/Stop Modes	Start and stop the device multiple times without having to download data or communicate with a PC
Multiple Star/Stop Mode Activation	To start the device:Press and hold the pushbutton for 5 seconds, the green LED will flash during this time. The device has started logging. To stop the device:Press and hold the pushbutton for 5 seconds, the red LED will flash during this time. The device has stopped logging
Realtime Recording	The device may be used with PC to monitor and record data in real time
LED Funcionality	Green LED blinks: 10 second rate to indicate logging 15 second rate to indicate delay start Red LED blinks: 10 second rate to indicate low battery and/or full memory 1 second rate to indicate an alarm condition
Password Protection	An optional password may be programmed into the device to restrict access to configuration options. Data may be read out without the password.
Engineering Units	Native measurement units can be scaled to display measurement units of another type. This is useful when monitoring voltage outputs from different types of sensors such as strain gauges and load cells.
Battery Type	3.6V lithium battery included; user replaceable
Battery Life	10 months typical at a 1 minute reading rate with a 350 ? load 2 years typical at a 1 minute reading rate with a 1000 ? load
Data Format	Date and time stamped events (true/false), user defined engineering units
Time Accuracy	±1 minute/month (at 20 ºC/68 ºF, stand alone data logging)
Computer Interface	USB (interface cable required); 115,200 baud
Software	XP SP3/Vista/Windows 7/Windows 8
Operating Environment	-10 ºC to +60 ºC (14 ºF to +140 ºF), 0 %RH to 100 %RH
IP Rating	IP65
Enclosure Dimension	2.9 in x 5.8 in x 1.5 in (74 mm x 148 mm x 39 mm)
Weight	8 oz (226 g)
Probe Dimension	4.4 in x2.3 in x 0.03 in (111 mm x 58 mm x 0.76 mm)
cable Length	196 in (5 m)
Material	ABS Plastic