Hobo Mx2300 series User manual

HOBO® MX2300 Series Data Logger Manual

20923-J

The HOBO MX2300 series data loggers record and transmit temperature and/or relative

humidity (RH) in outdoor or indoor environments. These Bluetooth® Low Energy-enabled

loggers are designed for wireless communication with a mobile device. Using the HOBOmobile®

app, you can easily configure the logger, read it out, and view data on your phone or tablet, or

export the data for further analysis. The logger can calculate minimum, maximum, average, and

standard deviation statistics and be configured to indicate alarms at thresholds you specify. The

logger also supports burst logging in which data is logged at a faster interval when sensor

readings are above or below certain limits. The Temp and Temp/RH models have internal

sensors while the External Temp/RH, External Temp, and 2x External Temp include built-in

external sensors, offering a wide range of solutions for monitoring temperature and RH in

numerous applications.

Specifications

Temperature Sensor

Range MX2301A and MX2305 internal sensors: -40 to 70°C (-40 to 158°F)

MX2302A external temperature sensor: -40 to 70°C (-40 to 158°F)

MX2303 and MX2304 external sensors: -40 to 100°C (-40 to 212°F), with

tip and cable immersion in fresh water up to 50°C (122°F) for one year

Accuracy ±0.25°C from -40 to 0°C (±0.45 from -40 to 32°F)

±0.2°C from 0 to 70°C (±0.36 from 32 to 158°F)

±0.25°C from 70 to 100°C (±0.45 from 158 to 212°F), MX2303 and

MX2304 only

Resolution MX2301A and MX2302A: 0.02°C (0.036°F)

MX2303, MX2304, and MX2305: 0.04°C (0.072°F)

Drift <0.01°C (0.018°F) per year

Relative Humidity Sensor* (MX2301A, MX2302A only)

Range 0 to 100% RH, -40° to 70°C (-40° to 158°F); exposure to conditions

below -20°C (-4°F) or above 95% RH may temporarily increase the

maximum RH sensor error by an additional 1%

Accuracy ±2.5% from 10% to 90% (typical) to a maximum of ±3.5% including

hysteresis at 25°C (77°F); below 10% RH and above 90% RH ±5% typical

Resolution 0.01%

Drift <1% per year typical

Response Time (typical, to 90% of change)

Temperature Without Solar

Radiation Shield

With RS1/M-RSA

Solar Radiation Shield

With RS3-B Solar

Radiation Shield

MX2301A

internal sensor

17 minutes in air

moving 1 m/sec

24 minutes in air

moving 1 m/sec

MX2302A

external sensor

3 minutes, 45 seconds

in air moving 1 m/sec

7 minutes, 45

seconds in air

moving 1 m/sec

6 minutes, 30

seconds in air

moving 1 m/sec

MX2303/MX2304

external sensors

3 minutes in air

moving 1 m/sec; 20

seconds in stirred

water

7 minutes in air

moving 1 m/sec

4 minutes in air

moving 1 m/sec

MX2305

internal sensor

17 minutes in air

moving 1 m/sec

24 minutes in air

moving 1 m/sec

RH Without Solar

Radiation Shield

With RS1/M-RSA

Solar Radiation Shield

With RS3-B Solar

Radiation Shield

MX2301A

internal sensor

30 seconds in air

moving 1 m/sec

40 seconds in air

moving 1 m/sec

MX2302A

external sensor

15 seconds in air

moving 1 m/sec

30 seconds in air

moving 1 m/sec

30 seconds in air

moving 1 m/sec

HOBO MX2300 Series

Data Logger

Models:

•MX2301A, temp/RH

•MX2302A, ext temp/RH

•MX2303, 2 ext temp

•MX2304, ext temp

•MX2305, temp

Included Items:

•Screws

•Cable ties

Required Items:

•HOBOmobile app

•Device with iOS or

Android™ and Bluetooth

Accessories:

•Solar radiation shield

(RS3-B for use with

MX2302A, MX2303, and

MX2304 models; RS1 or M-

RSA for use with MX2301A

and MX2305 models)

•Mounting bracket for solar

radiation shield (MX2300-

RS-BRACKET), for use with

MX2301A and MX2305

models

•Replacement battery

(HRB-2/3AA)

HOBO MX2300 Series Data Logger Manual

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Specifications (continued)

Logger

Operating Range -40° to 70°C (-40° to 158°F)

Radio Power 1 mW (0 dBm)

Transmission Range Approximately 30.5 m (100 ft) line-of-sight

Wireless Data Standard Bluetooth Low Energy (Bluetooth Smart)

Logging Rate 1 second to 18 hours

Logging Modes Fixed interval (normal, statistics) or burst

Memory Modes Wrap when full or stop when full

Start Modes Immediate, push button, date & time, or next interval

Stop Modes When memory full, push button, date & time, or after a set logging

period

Time Accuracy ±1 minute per month 0° to 50°C (32° to 122°F)

Battery Type 2/3 AA 3.6 Volt lithium, user replaceable

Battery Life 2 years, typical with logging interval of 1 minute and Bluetooth Always

On enabled; 5 years, typical with logging interval of 1 minute and

Bluetooth Always On disabled. Faster logging intervals and statistics

sampling intervals, burst logging, remaining connected with the app,

excessive downloads, and paging may impact battery life.

Memory MX2301A and MX2302A: 128 KB (63,488 measurements, maximum)

MX2303, MX2304, and MX2305: 128 KB (84,650 measurements,

maximum)

Full Memory Download Time Approximately 60 seconds; may take longer the further the device is

from the logger

Dimensions Logger housing: 10.8 x 5.08 x 2.24 cm (4.25 x 2.0 x 0.88 in.)

External temperature sensor diameter: 0.53 cm (0.21 in.)

External temperature/RH sensor diameter: 1.17 cm (0.46 in.)

External sensor cable length: 2 m (6.56 ft)

Solar radiation shield bracket: 10.8 x 8.3 cm (4.25 X 3.25 in.)

Weight Logger: 75.5 g (2.66 oz)

Solar radiation shield bracket: 20.4 g (0.72 oz)

Materials Acetal, silicone gasket, stainless steel screws

Environmental Rating NEMA 6 and IP67

The CE Marking identifies this product as complying with all relevant

directives in the European Union (EU).

See last page

*Per RH sensor manufacturer data sheet

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Logger Components and Operation

Mounting Holes: Use the holes at the top and bottom of the

logger to mount it (see Deploying and Mounting the Logger).

Alarm LED: This LED blinks red every 4 seconds when an alarm

is tripped (unless Show LED is disabled as described in

Configuring the Logger).

Status LED: This LED blinks blue every 4 seconds when the

logger is logging (unless Show LED is disabled as described in

Configuring the Logger). If the logger is waiting to start logging

because it was configured to start “On Button Push” or with a

delayed start, it will blink every 8 seconds.

Start Button: Press this button to wake up the logger; both the

alarm and status LEDs will blink. Once the logger is awake,

press this button to move it to the top of the loggers list in

HOBOmobile. Press this button for 3 seconds to start or stop

the logger when it is configured to start or stop “On button

push” (see Configuring the Logger). Both LEDs will blink four

times when you press the button to start or stop logging. Press

this button for 10 seconds to reset a password (see Setting a

Password).

External Sensor: This is the external probe attached to the

bottom of the logger that measures temperature or

temperature/RH. The MX2302A logger has one external sensor

that measures both temperature and RH and the MX2304

logger has one sensor that measures temperature only. The

MX2303 logger (shown at left above) has two external

temperature sensors; the left sensor is channel 1 and the first

temperature shown in HOBOmbile, and the right sensor is

channel 2 and the second in HOBOmobile.

Vent: The RH sensor is located behind the vent (MX2301A

model only).

Downloading HOBOmobile and

Connecting to a Logger

Install the HOBOmobile app to connect to and work with the

logger.

1. Download the HOBOmobile app from the App Store® or

Google Play™.

2. Open the app and enable Bluetooth in the device settings if

prompted.

3. Press the button on the logger to wake it up.

4. Tap the Devices icon and then tap Loggers at the top of the

screen. Tap the logger in the list to connect to it.

If the logger does not appear in the list or if it is having trouble

connecting, follow these tips:

•Make sure the logger is “awake” by pressing the start

button. The alarm and status LEDs will blink once when

the logger wakes up. You can also press the button a

second time to bring it to the top of the list if you are

working with multiple loggers.

•Make sure the logger is within range of your mobile

device. The range for successful wireless communication

is approximately 30.5 m (100 ft) with full line-of-sight.

•If there are several loggers in the area, move the logger

to a location with fewer loggers. Interference can

sometimes occur when numerous loggers are in one

location.

•If your device can connect to the logger intermittently or

loses its connection, move closer to the logger, within

sight if possible.

•If the logger appears in the list, but you cannot connect

to it, close HOBOmobile and power cycle the mobile

device. This forces the previous Bluetooth connection to

close.

Once connected to the logger you can select one of the

following actions:

•Configure. Select logger settings and load them onto the

logger to start logging. See Configuring the Logger.

•Readout. Download logger data. See Reading Out the

Logger.

•Full Status Details. Check the battery level and view the

configuration settings currently selected for the logger.

•Start Logging. Select this option to begin logging (if the

logger is configured to start “On Button Push” as

described in Configuring the Logger).

•Stop Logging. Stop the logger from recording data. This

overrides any Stop Logging settings described in

Configuring the Logger.

•Page Logger LED. Press and hold this option to illuminate

the alarm and status LEDs for 4 seconds.

•Logger Password. Select this to create a password for the

logger that will be required if another mobile device

attempts to connect to it. To reset a password, connect

Alarm LED

Mounting

Holes

Start Button

External Sensor

Status LED

MX2303 model shown

Vent

MX2301A model shown

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to the logger, tap Set Logger Passkey, and select Reset to

Factory Default. You can also press the button on the

logger for 10 seconds to reset a password.

Update Firmware. When new logger firmware is

available, this action appears in the list. Select it and

follow the instructions on the screen. A logger readout

will be completed automatically at the beginning of the

firmware update process. If the connection is lost

between the logger and the mobile device during the

firmware update, a Firmware Update Pending Status

displays for the logger in the Loggers list. Connect to

the logger and select Restore Logger (or Update

Firmware if that option is available) to continue

updating the firmware.

Important: Before updating the firmware on the

logger, check the remaining battery level by selecting

Full Status Details and make sure it is no less than 30%.

Make sure you have the time to complete the entire

update process, which requires that the logger remains

connected to the device during the upgrade.

•Force Offload. This may appear if an error was

encountered when loading configuration settings. Select

this to offload all the data on the logger before

reconfiguring it.

Configuring the Logger

Use HOBOmobile to set up the logger, including selecting the

logging options, configuring alarms, and other settings. These

steps provide an overview of setting up the logger. For

complete details, see the HOBOmobile User’s Guide.

1. Press the button on the logger to wake it up.

2. Find the logger in the list and tap it to connect to it. If you

are working with multiple loggers, you can press the button

on the logger a second time to bring it to the top of the list.

The logger name (or serial number if no name has been

assigned) turns green when the logger moves to the top of

the list. Note that the current readings are displayed even

when the logger is not logging.

3. Once connected, tap Configure.

4. Tap Name and type a name for the logger up to 20

characters (optional). Tap Done. If no name is selected, the

logger serial number is used as the name.

5. Tap Group to add the logger to the Favorites group, an

existing custom group, or create a new group name with up

to 20 characters (optional). Tap Done.

6. Tap Logging Interval and choose how frequently the logger

will record data unless operating in burst logging mode (see

Burst Logging). Note: If you configure an alarm, the logger

will use the logging interval you selected as the rate to

check for alarm conditions (alarms are not available if burst

logging is configured). See Setting up Alarms for more

details.

7. Tap Start Logging and select when logging will begin:

•Now. Logging will begin immediately after tapping Start

in the Configure screen.

•On Next Logging Interval. Logging will begin at the next

even interval as determined by the selected logging

interval.

•On Button Push. Logging will begin once you press the

button on the logger for 3 seconds.

•On Date/Time. Logging will begin on a date and time you

specify. Select the Date and time and tap Done.

Tap Done in the Start Logging screen.

8. Tap Stop Logging and select the options for when logging

will end.

a. Choose one of two memory options:

•When Memory Fills. The logger will continue recording

data until the memory is full.

•Never (Wrap When Full). The logger will continue

recording data indefinitely, with newest data

overwriting the oldest. This option is not available if

the Logging Mode is set to Burst (see Burst Logging).

b. Select On Button Push if you want to be able to stop

logging by pushing the button on the logger for 3

seconds. Note that if you also choose On Button Push for

the Start Logging option, then you will not be able to stop

logging until 30 seconds after logging begins.

c. Select one of the following time options for when to stop

logging:

•Never. Select this if you do not want the logger to stop

at any predetermined time frame.

•On Date/Time. Select this if you want the logger to

stop logging on a specific date and time. Select the

date and time and then tap Done.

•After. Select this if you want to control how long the

logger should continue logging once it starts. Choose

the amount of time you want the logger to log data

and then tap Done. For example, select 30 days if you

want the logger to log data for 30 days after logging

begins.

d. Tap Done in the Stop Logging screen.

9. Select the sensor measurement types that will be logged.

Both the temperature and RH sensors are required to

calculate dew point, which is an additional data series

available for plotting after reading out the logger. You can

also set up alarms to trip when a sensor reading rises above

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Sensor in Limits in step 9. Otherwise, the alarm state will

remain in place until the logger is reconfigured.

Notes:

•Alarm limits are checked at every logging interval. For

example, if the logging interval is set to 5 minutes, then

the logger will check the sensor readings against your

configured high and low alarm setting every 5 minutes.

•The actual values for the high and low alarm limits are set

to the closest value supported by the logger. For

example, the closest value to 85°F that the logger can

record is 84.990°F and the closest value to 32°F is

32.043°F. In addition, alarms can trip or clear when the

sensor reading is within the logger specifications of

0.072°F resolution. This means the value that triggers the

alarm may differ slightly than the value entered. For

example, if the High Alarm is set to 75.999°F, the alarm

can trip when the sensor reading is 75.994°F (which is

within the 0.072°F resolution).

•When you read out the logger, alarm events can be

displayed on the plot or in the data file. See Logger

Events.

Burst Logging

Burst logging is a logging mode that allows you to set up more

frequent logging when a specified condition is met. For

example, a logger is recording data at a 5-minute logging

interval and burst logging is configured to log every 30 seconds

when the temperature rises above 85°F (the high limit) or falls

below 32°F (the low limit). This means the logger will record

data every 5 minutes as long as the temperature remains

between 85°F and 32°F. Once the temperature rises above

85°F, the logger will switch to the faster logging rate and record

data every 30 seconds until the temperature falls back to 85°F.

At that time, logging then resumes every 5 minutes at the

normal logging interval. Similarly, if the temperature falls below

32°F, then the logger would switch to burst logging mode again

and record data every 30 seconds. Once the temperature rises

back to 32°F, the logger will then return to normal mode,

logging every 5 minutes. Note: Sensor alarms, statistics, and the

Stop Logging option “Wrap When Full” are not available in

burst logging mode.

To set up burst logging:

1. Tap the Devices icon and then tap Loggers at the top of the

screen. Tap the logger to connect to it. If the logger was

configured with Bluetooth Always On disabled, press the

button on the logger to wake it up. When working with

multiple loggers, you can also press the button on the

logger to bring it to the top of the list.

2. Once connected, tap Configure.

3. Tap Logging Mode and then tap Burst Logging.

4. Tap a sensor under Burst Sensor Limits.

5. Enable High Limit if you want burst logging to occur when

the sensor reading rises above a specific reading. Drag the

slider to the reading that will trigger burst logging or tap the

value field and type a specific reading. In this example, the

logger will switch to burst logging when the temperature

rises above 85°F.

6. Enable Low Limit if you want burst logging to occur when

the sensor reading falls below a specific reading. Drag the

slider to the reading that will trigger burst logging or tap the

value field and type a specific reading. In the example, the

logger will switch to burst logging when the temperature

falls below 32°F.

7. Tap Done and repeat steps 4–7 for the other sensor if

desired.

8. Tap Burst Logging Interval and select an interval faster than

the logging interval. Keep in mind that the faster the burst

logging rate, the greater the impact on battery life and the

shorter the logging duration. Because measurements are

being taken at the burst logging interval throughout the

deployment, the battery usage is similar to what it would be

if you had selected this rate for the normal logging interval.

Tap Done.

9. Tap Done to exit the Logging Mode screen.

10. Tap Start in the Configure screen to load the burst settings

onto the logger if you are ready to start.

Notes:

•The high and low burst limits are checked at the burst

logging interval rate whether the logger is in normal or

burst condition. For example, if the logging interval is set

to 1 hour and the burst logging interval is set to 10

minutes, the logger will always check for burst limits

every 10 minutes.

•If high and/or low limits have been configured for more

than one sensor, then burst logging will begin when any

high or low condition goes out of range. Burst logging will

not end until all conditions on all sensors are back within

normal range.

•The actual values for the burst logging limits are set to

the closest value supported by the logger. For example,

the closest value to 85°F that the logger can record is

84.990°F and the closest value to 32°F is 32.043°F.

•Burst logging can begin or end when the sensor reading is

within the logger specifications of 0.072°F resolution.

This means the value that triggers burst logging may

differ slightly than the value entered. For example, if the

high limit for a temperature alarm is set to 75.999°F,

burst logging can start when the sensor reading is

75.994°F (which is within the 0.072°F resolution).

•Once the high or low condition clears, the logging

interval time will be calculated using the last recorded

data point in burst logging mode, not the last data point

recorded at the normal logging rate. For example, the

logger has a 10-minute logging interval and logged a data

point at 9:05. Then, the high limit was surpassed and

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burst logging began at 9:06. Burst logging then continued

until 9:12 when the sensor reading fell back below the

high limit. Now back in normal mode, the next logging

interval will be 10 minutes from the last burst logging

point, or 9:22 in this case. If burst logging had not

occurred, the next data point would have been at 9:15.

•A New Interval event is created each time the logger

enters or exits burst logging mode. See Logger Events for

details on plotting and viewing the event. In addition, if

the logger is stopped with a button push while in burst

logging mode, then a New Interval event is automatically

logged and the burst condition is cleared, even if the

actual high or low condition has not cleared.

Statistics Logging

During fixed interval logging, the logger records data for

enabled sensors and/or selected statistics at the logging

interval selected. Statistics are calculated at a sampling rate you

specify with the results for the sampling period recorded at

each logging interval. The following statistics can be logged for

each sensor:

•The maximum, or highest, sampled value,

•The minimum, or lowest, sampled value,

•An average of all sampled values, and

•The standard deviation from the average for all sampled

values.

For example, a logger is configured with both the temperature

and RH sensors enabled, and the logging interval set to 5

minutes. The logging mode is set to fixed interval logging with

Normal and all four statistics enabled and with a statistics

sampling interval of 30 seconds. Once logging begins, the logger

will measure and record the actual temperature and RH sensor

values every 5 minutes. In addition, the logger will take a

temperature and RH sample every 30 seconds and temporarily

store them in memory. The logger will then calculate the

maximum, minimum, average, and standard deviation using the

samples gathered over the previous 5-minute period and log

the resulting values. When reading out the logger, this would

result in 10 data series (not including any derived series, such

as dew point): two sensor series (with temperature and RH

data logged every 5 minutes) plus eight maximum, minimum,

average, and standard deviation series (four for temperature

and four for RH with values calculated and logged every 5

minutes based on the 30-second sampling).

To log statistics:

1. Tap the Devices icon and then tap Loggers at the top of the

screen. Tap the logger to connect to it. If the logger was

configured with Bluetooth Always On disabled, press the

button on the logger to wake it up. When working with

multiple loggers, you can also press the button on the

logger to bring it to the top of the list.

2. Once connected, tap Configure.

3. Tap Logging Mode and then select Fixed Interval Logging.

4. Select Normal to record the current reading for each

enabled sensor at the logging interval shown at the top of

the screen. Do not select this if you only want to log

statistics.

5. Select the statistics you want the logger to record at each

logging interval: Maximum, Minimum, Average, and

Standard Deviation (average is automatically enabled when

selecting Standard Deviation). Statistics will be logged for all

enabled sensors. In addition, the more statistics you record,

the shorter the logger duration and the more memory is

required.

6. Tap Statistics Sampling Interval and select the rate to use

for calculating statistics. The rate must be less than, and a

factor of, the logging interval. For example, if the logging

interval is 1 minute and you select 5 seconds for the

sampling rate, then the logger will take 12 sample readings

between each logging interval (one sample every 5 seconds

for a minute) and use the 12 samples to record the resulting

statistics at each 1-minute logging interval. Note that the

faster the sampling rate, the greater the impact on battery

life. Because measurements are being taken at the statistics

sampling interval throughout the deployment, the battery

usage is similar to what it would be if you had selected this

rate for the normal logging interval.

7. Tap Done.

8. Tap Done again to exit the Logging Mode screen.

9. Tap Start in the Configure screen to load the statistics

settings onto the logger if you are ready to start.

Setting a Password

You can create an encrypted password for the logger that will

be required if another phone or tablet attempts to connect to

it. This is recommended to ensure that a deployed logger is not

mistakenly stopped or purposely altered by others. This

password uses a proprietary encryption algorithm that changes

with every connection.

To set a password:

1. Tap the Devices icon and then tap Loggers at the top of the

screen and connect to the logger.

2. Tap Logger Password.

3. Type a password up to 10 characters.

4. Tap Save.

Only the phone or tablet used to set the password can then

connect to the logger without entering a password; all other

mobile devices will be required to enter the password. For

example, if you set the password for the logger with your tablet

and then try to connect to the device later with your phone,

you will be required to enter the password on the phone but

not with your tablet. Similarly, if others attempt to connect to

the logger with different devices, then they would also be

required to enter the password. To reset a password, connect

to the logger, tap Set Logger Passkey, and select Reset to

Factory Default or press the button on the logger for 10

seconds.

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Reading Out the Logger

To offload data from the logger:

1. Tap the Devices icon and then tap Loggers at the top of the

screen. Tap the logger to connect to it. If the logger was

configured with Bluetooth Always On disabled, press the

button on the logger to wake up communications. When

working with multiple loggers, you can also press the

button on the logger to bring it to the top of the list.

2. Once connected, tap Readout.

3. Tap the Data Files icon to view a mini-graph of the

downloaded data.

4. Tap the mini-graph to view a larger version of the graph or

to share the file. See the HOBOmobile User’s Guide for

details on viewing graphs and sharing data.

Data can also be uploaded automatically to HOBOlink, Onset’s

web-based software, via HOBOmobile or the HOBO MX

Gateway. For details on uploading data to HOBOlink, see the

HOBOmobile User’s Guide.

Logger Events

The logger records the following internal events to track logger

operation and status. To plot events in HOBOmobile, tap a

mini-graph and then tap . Select the events you wish to plot

and then tap again. You can also view events in shared or

exported data files.

Internal Event Name Definition

Host Connected The logger was connected to the mobile

device.

Started The logger started logging.

Stopped The logger stopped logging.

Alarm

Tripped/Cleared

An alarm has occurred because the reading

was outside the alarm limits or back within

range. Note: Although the reading may have

returned to a normal range during logging,

an alarm cleared event will not be logged if

the logger was set up to maintain alarms

until reconfigured.

New Interval The logger has switched to logging at the

burst logging rate or back to the normal rate.

Safe Shutdown The battery level dropped below a safe

operating voltage and the logger performed

a safe shutdown.

Deploying and Mounting the Logger

Follow these guidelines when deploying the logger:

•A solar radiation shield is required if the MX2301A or

MX2305 logger or the external sensors from an

MX2302A, MX2303, or MX2304 logger will be in sunlight

at any time.

•When using a solar radiation shield with an MX2301A or

MX2305 model, the logger must be mounted using the

solar radiation shield bracket (MX2300-RS-BRACKET) to

the underside of the mounting plate as shown on the

next page.

For more details on the solar radiation shield, refer to the

Solar Radiation Shield Installation Guide at

www.onsetcomp.com/manuals/rs1.

•When deploying an MX2302A logger, it is recommended

that the sensor must be mounted vertically. If it must be

mounted horizontally, then make sure the vent on the

side of the sensor is vertical or facing down. If the sensor

is being deployed in an RS3-B solar radiation shield,

mount it vertically as shown below.

•When deploying a logger with external sensors

(MX2302A, MX2303, and MX2304), mount the logger so

the sensor cable is not being pulled. Leave about 5 cm (2

in.) of drip loop in the cable where it comes out of the

logger to prevent water from entering the logger

housing.

•For MX2301A and MX2305 loggers that are not being

deployed with a solar radiation shield or for loggers with

external sensors (MX2302A, MX2303, and MX2304), you

can either use the included large screws or cable ties to

mount the logger via the mounting holes. Use the screws

to attach the logger to a wall or flat surface. Use the

cable ties to affix the logger to a PVC pipe or mast. The

MX2301A logger must also be mounted vertically or with

the sensor vent facing down when not using the solar

radiation shield.

Drip Loop

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registered trademarks of Onset Computer Corporation. App Store is a service mark of Apple Inc. Android and

Google Play are trademarks of Google LLC. Bluetooth and Bluetooth Smart is a registered trademark of Bluetooth

SIG, Inc. All other trademarks are the property of their respective companies.

Patent #: 8,860,569 20923-J

Protecting the Logger

Note: Static electricity may cause the logger to stop logging.

The logger has been tested to 8 KV, but avoid electrostatic

discharge by grounding yourself to protect the logger. For more

information, search for “static discharge” on onsetcomp.com.

Battery Information

The logger requires one user-replaceable 2/3 AA 3.6 V lithium

battery (HRB-2/3AA). Battery life is 2 year, typical with a logging

interval of 1 minute, but may be extended to 5 years when the

logger is configured with Bluetooth Always On disabled.

Expected battery life varies based on the ambient temperature

where the logger is deployed, the logging or sampling interval,

frequency of offloading and connecting to the mobile device,

number of channels that are active, and use of burst mode or

statistics logging. Deployments in extremely cold or hot

temperatures or logging interval faster than 1 minute can

impact battery life. Estimates are not guaranteed due to

uncertainties in initial battery conditions and operating

environment.

To install or replace the battery:

1. Use a Phillips-head screwdriver to unscrew the four screws

from the back of the logger.

2. Carefully separate the top and bottom of the logger

enclosure.

3. Remove the old battery and insert the new battery

observing polarity. It is recommended that you replace the

desiccant (DESICCANT2) when replacing the battery.

4. Make sure the rubber seal is clean and free of any debris

and then carefully reassemble the logger enclosure and

screw in the four screws.

WARNING: Do not cut open, incinerate, heat above 85°C

(185°F), or recharge the lithium battery. The battery may

explode if the logger is exposed to extreme heat or conditions

that could damage or destroy the battery case. Do not dispose

of the logger or battery in fire. Do not expose the contents of

the battery to water. Dispose of the battery according to local

regulations for lithium batteries.

Federal Communication Commission Interference Statement

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide

reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and

used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a

particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user

is encouraged to try to correct the interference by one of the following measures:

•Reorient or relocate the receiving antenna

•Increase the separation between the equipment and receiver

•Connect the equipment into an outlet on a circuit different from that to which the receiver is connected

•Consult the dealer or an experienced radio/TV technician for help

This device complies with Part 15 of the FCC Rules. 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.

FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment.

Industry Canada Statements

This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and

(2) this device must accept any interference, including interference that may cause undesired operation of the device.

Avis de conformité pour l’Industrie Canada

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'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le

fonctionnement.

To comply with FCC and Industry Canada RF radiation exposure limits for general population, the logger must be installed to provide a separation distance of at least 20cm from