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Please visit www.kestrelinstruments.com/support/drop_support for more information.
Temperature
• A slight air flow of 2 mph or more will speed up temperature response times.
• DROP can be used to measure water or snow temperature by submerging the thermistor.
• DROP can withstand being in 1 meter of water for up to 30 minutes.
Humidity
• For accurate humidity readings, allow the DROP to equilibrate to its environment. Depending on the temperature and humidity differential
between environments, this can take between 20 and 90 minutes.
Note: Users can use the graph in the Kestrel LiNK app to monitor when the humidity reaches equilibrium as the humidity graph will trend flat
when it reaches this point.
• After submersion in a liquid, humidity readings, if available on your DROP, will be impacted until the humidity sensor area has fully dried. Gently
blowing on the sensor area (the small grid of holes in the front case) can speed this process.
• After exposure to temperatures over 80°C/176°F, an offset in humidity may be present for a period.
Connectivity
• Typical range is 100 ft but longer ranges can be achieved. Metal enclosures, ice, submersion in liquids, obstructed lines-of-site and ground level or
non-vertical logging positions will reduce connection range.
• If more than 3-4 DROPs are present, turning off auto connect and manually connecting one at a time will help the app connect successfully.
Typically, a maximum of 8 DROPs can be connected to a device at a time.
• The DROP uses Bluetooth Low Energy (BLE) to connect to devices.
Operating Temperature
• The DROP will operate without restriction from 14°F/-10°C to 131°F/55°C. Operation at lower temperatures will be limited by the available power
and life span of the coin cell battery. Downloading a full data log in temperatures below 14°F/-10°C may tax the battery to the point where the
DROP will not operate until the battery has been replaced. For best results below 14°F/-10°C, use a fresh battery, keep data log downloads short
(1000 data points or fewer), or allow the DROP to warm to above 14°F/-10°C before connecting or attempting to download logs. The DROP can
generally be expected to continue to log data points down to 0°F/-18°C with these limitations.
Battery Life
• Cold conditions, frequent logging rates, and frequent log downloads will all shorten battery life.
• When downloading extremely large data logs or making firmware updates, avoid using low batteries and conditions below 32°F/0°C.
• Estimated battery life at the baseline settings programmed into your DROP when shipped from the factory (10 min logging rate, 5 sec connection
rate) and room temperature (77°F/25°C) is about 4 months. Intensive logging and connection settings (2 sec logging rate, constant connection)
can reduce battery life to as little as 11 days.
Getting More from Your DROP
