Hobo Tidbit mx temp 400 User manual

HOBO® TidbiT® MX Temp 400 (MX2203) and

Temp 5000 (MX2204) Logger Manual

21537-L

HOBO TidbiT MX Temp loggers measure temperature in streams, lakes, oceans, coastal

habitats, and soil environments. Housed in a protective boot, these rugged loggers are

designed for extended deployments in fresh or salt water at depths up to 400 ft (MX2203) or

5,000 ft (MX2204). The loggers use Bluetooth® Low Energy for wireless communication with a

mobile device and are equipped with an optional water detection feature that automatically

turns Bluetooth advertising off when the logger is submerged in water, thereby preserving

battery power. Using the HOBOconnect™ app, you can easily configure the loggers, download

logged data to your phone or tablet, or automatically upload the data to HOBOlink® for further

analysis. You can also configure the loggers to calculate statistics, set up alarms to trip at

specific thresholds, or enable burst logging in which data is logged at a faster interval when

sensor readings are above or below certain limits.

Specifications

Temperature Sensor

Range MX2203: -20° to 70°C (-4° to 158°F) in air; -20° to 50°C (-4° to 122°F) in

water

MX2204: -20° to 70°C (-4° to 158°F) in air; -20° to 50°C (-4° to 122°F) in

water, maximum sustained temperature in water 30°C (86°F)

Accuracy ±0.25°C from -20° to 0°C (±.45°F from -4° to 32°F)

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

Resolution 0.01°C (0.018°F)

Drift <0.1°C (0.18°F) per year

Response Time MX2203: 17 minutes typical to 90% in air moving 1 m/s, unmounted;

7 minutes typical to 90% in stirred water, unmounted

MX2204: 15 minutes typical to 90% in air moving 1 m/s, unmounted;

4 minutes typical to 90% in stirred water, unmounted

Logger

Logger Operating Range -20° to 70°C (-4° to 158°F)

Buoyancy (Fresh Water) MX2203: 3.1 g (0.11 oz) negative

MX2204: 7.6 g (0.27 oz) negative

Waterproof MX2203: To 122 m (400 ft)

MX2204: To 1,524 m (5,000 ft)

Water Detection Water conductivity level of 100 µS/cm or greater necessary for reliable

detection of water. Deionized water or water below 100 µS/cm may

not be detected.

The water conductivity circuit may not reliably detect water that has

frozen around the electrodes, i.e. below 0°C (32°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

Time Accuracy ±1 minute per month at 25°C (77°F)

Battery CR2477 3V lithium, user replaceable in MX2203, non-replaceable in

MX2204

Battery Life 3 years, typical at 25°C (77°F) with logging interval of 1 minute and

Bluetooth Always Off disabled in software.

5 years, typical at 25°C (77°F) with logging interval of 1 minute and

Bluetooth Always Off or Bluetooth Off Water Detect enabled in

software.

Faster logging intervals and statistics sampling intervals, burst logging,

remaining connected with the app, excessive downloads, and paging

may impact battery life.

To ensure proper battery installation, see Battery Information for

detailed instructions on replacing the battery in the MX2203 logger.

Memory 96,000 measurements

HOBO TidbiT MX Temp

Logger

Models:

•MX Temp 400 (MX2203)

•MX Temp 5000

(MX2204)

Items included:

•Protective boot

Required Items:

•HOBOconnect app

•Mobile device with

Bluetooth and iOS,

iPadOS®, or Android™

Accessories:

•Solar radiation shield

(RS1 or M-RSA) for

MX2203

•Mounting bracket for

solar radiation shield

(MX2200-RS-BRACKET),

for use with MX2203

models

•Replacement O-rings

(MX2203-ORING) for

MX2203

•Replacement boots for

both models in gray

(BOOT-MX220x-GR),

black (BOOT-MX220x-

BK), or white (BOOT-

MX220x-WH)

MX2203 Model Shown

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Specifications (continued)

Full Memory Download

Time

Approximately 45 seconds; may take longer the farther the device is

from the logger

Wetted Materials MX2203: Polypropylene case, Delrin® battery cover, EPDM O-ring,

stainless steel screws, Santoprene® (TPE) boot

MX2204: Epoxy case, Santoprene (TPE) boot

Dimensions MX2203: 4.45 x 7.32 x 3.58 cm (1.75 x 2.88 x 1.41 inches)

MX2204: 4.06 x 6.99 x 3.51 cm (1.6 x 2.75 x 1.38 inches)

eight MX2203: 36.2 g (1.28 oz)

MX2204: 32.8 g (1.16 oz)

Environmental Rating IP68

The CE Marking identifies this product as complying with all relevant

directives in the European Union (EU).

See last page

Logger Components and Operation

MX2204 MX2203

Protective Boot: This waterproof cover protects the logger

during deployment. It has two mounting tabs and a built-in

magnet to use with the logger’s internal reed switch (see

Deploying and Mounting the Logger).

Magnetic Start Button: This button is functional when the

logger is inside the protective boot. 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). Press

this button for 1 second to wake up the logger (if configured

with Bluetooth Always Off as described in Configuring the

Logger). You may need to press the button a second time to

wake up the logger if it is logging every 5 seconds or faster and

the temperature is -10°C (14°F) or below.

Mounting Tab: Use the tabs at the top and bottom of the

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

Reed Switch: The logger has an internal reed switch

represented by the dotted rectangle on the logger. The reed

switch is used in conjunction with the magnetic button in the

protective boot. When the logger is removed from the boot, a

magnet placed over the reed switch can substitute for the built-

in button (see Deploying and Mounting the Logger).

Water Detection Screws: These two screws can detect the

presence of water. This allows you to configure the logger in

power-saving mode in which Bluetooth advertising is active

only when the logger is removed from water. See Configuring

the Logger for details. Note: The logger will check for the

presence of water every 15 seconds when the Bluetooth Off

Water Detect power-saving mode is selected.

Temperature Sensor: The internal temperature sensor (not

visible in the diagram) is located on upper right side of the

logger.

Status LED: This LED blinks green 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 green every 8 seconds. Both this LED

and the Alarm LED will blink once when you press the button to

wake up the logger or will blink four times when you press the

button to start or stop logging. If you select in the app,

both LEDs will be illuminated for 5 seconds (see Getting Started

for more details).

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).

Getting Started

Install the app to connect to and work with the logger.

1. Download HOBOconnect from the App Store® or Google

Play™.

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

prompted.

3. If this is the first time you are using the logger, firmly press

the magnetic start HOBO button near the center of the

logger to wake it up. The alarm and status LEDs will blink

once when the logger wakes up. This will also bring the

logger to the top of the list if you are working with multiple

loggers.

4. Tap Devices and then tap the logger in the app to connect

to it.

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

trouble connecting, follow these tips.

•If the logger was configured with Bluetooth Always Off

(see Configuring the Logger), it is currently logging at a

fast interval (5 seconds or faster), and the temperature is

-10°C (14°F) or below, you may need to press the button

twice before it appears in the list.

Magnetic

Start Button

Mounting Tab

Protective

Boot

Status LED

Water-Detection

Screws

Reed Switch (Internal)

Alarm LED

Temperature

Sensor

(Internal)

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•Make sure the logger is within range of your mobile

device. The range for successful wireless communication

in air is approximately 30.5 m (100 ft) with full line-of-

sight.

•Change the orientation of your phone or tablet to ensure

the antenna in your device is pointed toward the logger.

Obstacles between the antenna in the device and the

logger may result in intermittent connections.

•If the logger is in water and configured with Bluetooth

Off Water Detect, you must remove the logger from the

water to connect to it.

•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 is in water, the connection

can be unreliable. Remove it from water for a consistent

connection.

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

to it, close the app and power cycle the mobile device.

This forces the previous Bluetooth connection to close.

Once the logger is connected, you can:

Tap this: To do this:

Select logger settings and save them onto the

logger to start logging. See Configuring the

Logger.

Read out (offload) logger data. See Reading Out

the Logger.

Start logging if the logger was configured to start

with a button push. See Configuring the Logger.

Stop the logger from recording data (this

overrides any Stop Logging settings described in

Configuring the Logger).

Illuminate the logger LEDs for 5 seconds.

Set a password for the logger that will be

required if another mobile device attempts to

connect to it. To reset a password, press the

button on the logger for 10 seconds or tap

and tap Reset.

Mark the logger as a favorite. You can then filter

the list of devices to only show loggers marked as

favorites.

Update the firmware on the logger. A logger

readout will be completed automatically at the

beginning of the firmware update process

Important: Before updating the firmware on

the logger, check the remaining battery level

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.

Configuring the Logger

Use the app to set up the logger, including selecting the logging

interval, start and stop logging options, and configuring alarms.

These steps provide an overview of setting up the logger. For

complete details, see the app user’s guide.

1. If the logger was previously configured with Bluetooth

Always Off, press the button on the logger to wake it up. If

the logger was previously configured with Bluetooth Off

Water Detect and it is deployed in water, remove it from

water. If you are working with multiple loggers, pressing the

button also brings the logger to the top of the list in the

app.

2. Tap Devices. Tap the logger in the app to connect to it.

3. Tap to configure the logger.

4. Tap Name and type a name for the logger (optional). If no

name is selected, the logger serial number is used as the

name.

5. Tap Group to add the logger to a group (optional). Tap Save.

6. Tap Logging Interval and choose how frequently the logger

will record data unless operating in burst logging mode (see

Burst Logging).

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

•Now. Logging will begin immediately after configuration

settings are loaded on the logger.

•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 at a date and time you

specify. Select the Date and time.

Tap Save.

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.

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

logging by pushing the button on the logger for 3

seconds.

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.

•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.

For example, select 30 days if you want the logger to

log data for 30 days after logging begins.

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d. Tap Save.

9. Tap Logging Mode. Select either fixed or burst logging. With

fixed logging, the logger records data for all enabled sensors

and/or selected statistics at the logging interval selected

(see Statistics Logging for details on choosing statistics

options). In burst mode, logging occurs at a different

interval when a specified condition is met. See Burst

Logging for more information. Tap Save.

10. Enable or disable Show LED. If Show LED is disabled, the

alarm and status LEDs on the logger will not be illuminated

while logging (the alarm LED will not blink if an alarm trips).

You can temporarily turn on LEDs when Show LED is

disabled by pressing the button on the logger for 1 second.

11. Select the power saving mode, which determines when the

logger will “advertise” or regularly send out a Bluetooth

signal for the phone or table to find via the app.

•Bluetooth Always Off. The logger will only advertise

during logging when you press the button on the

protective boot (or place a magnet where the reed

switch is located if the logger is out of the protective

boot). This will wake up the logger when you need to

connect to it. This option uses the least battery power.

•Bluetooth Off Water Detect. The logger will not

advertise when the presence of water is detected. Once

the logger is removed from the water, advertising will

automatically turn on, thereby not requiring you to push

a button (or use a magnet) to wake up the logger when

you need to connect to it. This option preserves some

battery power. Note: The logger will check for the

presence of water every 15 seconds when this is option is

selected.

•Bluetooth Always On. The logger will always advertise.

You will never need to push a button (or use a magnet)

to wake up the logger. This option uses the most battery

power.

12. You can set up alarms to trip when a sensor reading rises

above or falls below a specified value. See Setting up Alarms

for details on enabling sensor alarms.

13. Tap to save the configuration settings.

Logging will begin based on the settings you selected. See

Deploying and Mounting the Logger for details on mounting

and see Reading Out the Logger for details on downloading.

Setting up Alarms

You can set up alarms for the logger so that if a sensor reading

rises above or falls below a specified value, the logger alarm

LED will blink and an alarm icon will appear in the app. This can

alert you to problems so you can take corrective action.

To set an alarm:

1. Tap Devices. If the logger was configured with Bluetooth

Always Off enabled, press the HOBOs button on the logger

to wake it up. If the logger was configured with Bluetooth

Off Water Detect and is currently underwater, remove it

from the water.

2. Tap the logger to connect to it and tap .

3. Tap a sensor (tap the Enable Logging toggle if necessary).

4. Select High if you want an alarm to trip when the sensor

reading rises above the high alarm value. Drag the slider or

type a value to set the high alarm value.

5. Select Low if you want an alarm to trip when the sensor

reading falls below the low alarm value. Drag the slider or

type a value to set the low alarm value.

6. For the Duration, select how much time should elapse

before the alarm trips and select one of the following:

•Cumulative. The alarm will trip once the sensor reading is

out of the acceptable range for the selected duration any

time during logging. For example, if the high alarm is set

to 85°F and the duration is set to 30 minutes, then the

alarm will trip once the sensor readings have been above

85°F for a total of 30 minutes since the logger was

configured.

•Consecutive. The alarm will trip once the sensor reading

is out of the acceptable range continuously for the

selected duration. For example, the high alarm is set to

85°F and the duration is set to 30 minutes, then the

alarm will only trip if all sensor readings are 85°F or

above for a continuous 30-minute period.

7. Tap Save.

8. In the configuration settings, select one of the following

options to determine how the alarm indications are cleared:

•Logger Reconfigured. The alarm indication will display

until the next time the logger is reconfigured.

•Sensor in Limits. The alarm indication will display until

the sensor reading returns to the normal range between

any configured high and low alarm limits.

9. Tap .

When an alarm trips, the logger alarm LED blinks every 4

seconds (unless Show LED is disabled), an alarm icon appears in

the app, and an Alarm Tripped event is logged. The alarm state

will clear when the readings return to normal if you selected

Sensor in Limits in step 8. 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. In addition, alarms can trip or clear

when the sensor reading is within resolution

specifications.

•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

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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 Devices. If the logger was configured with Bluetooth

Always Off enabled, press the HOBOs button on the logger

to wake it up. If the logger was configured with Bluetooth

Off Water Detect and is currently underwater, remove it

from the water.

2. Tap the logger to connect to it and tap .

3. Tap Logging Mode and then tap Burst Logging.

4. Select Low and/or High and either type or drag the slider to

set the low and/or high values.

5. Set the burst logging interval, which must be 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.

6. Tap Save.

7. Tap .

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.

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

the closest value supported by the logger. In addition,

burst logging can begin or end when the sensor reading is

within the specified resolution. This means the value that

triggers burst logging may differ slightly than the value

entered.

•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

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 the

temperature sensor 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:

•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, the logging interval is 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 values every 5 minutes. In

addition, the logger will take a temperature 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 five data series: one

temperature series (with data logged every 5 minutes) plus four

maximum, minimum, average, and standard deviation series

(with values calculated and logged every 5 minutes based on

the 30-second sampling).

To log statistics:

1. Tap Devices. If the logger was configured with Bluetooth

Always Off enabled, press the HOBOs button on the logger

to wake it up. If the logger was configured with Bluetooth

Off Water Detect and is currently underwater, remove it

from the water.

2. Tap the logger in the app to connect to it and tap .

3. Tap Logging Mode and then select Fixed Logging.

4. Select Normal to record the current reading for the

temperature 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

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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 Save.

8. Tap .

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 Devices. If the logger was configured with Bluetooth

Always Off enabled, press the HOBOs button on the logger

to wake it up. If the logger was configured with Bluetooth

Off Water Detect and is currently underwater, remove it

from the water.

2. Tap the logger in the app to connect to it. Tap and then

3. Type a password and then tap Set.

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, press the

button on the logger for 10 seconds or connect to the logger

and tap , then , and tap Reset.

Reading Out the Logger

To download data from the logger:

1. Tap Devices.

2. If the logger was configured with Bluetooth Always On,

continue to step 3.

If the logger was configured with Bluetooth Always Off,

press the button on the logger for 1 second to wake it up.

If the logger was configured with Bluetooth Water Detect

and it is deployed in water, remove it from the water.

3. Tap the logger in the app to connect to it and tap . The

logger will read out the data to the phone or tablet.

4. Once the readout is complete, tap HOBO Files and select

the file to view it. Tap and then to export and share

the data.

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

web-based software, via the app or the MX gateway. For

details, see the app user’s guide and see the HOBOlink help for

details on working with data in HOBOlink.

Logger Events

The logger records the following events to track logger

operation and status. You can view events in exported files or

plot events in the app.

To plot events, tap HOBO Files and select a file to open.

Tap and then tap . Select the events you want to plot

and tap OK.

Event Name Definition

Host Connect The logger was connected to a 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

return to a normal range, an alarm cleared

event will not be logged if the logger was set

up to maintain alarms until reconfigured.

Button Up/Down The button on the logger was pressed to

wake it up/bring it to the top of the loggers

list in the app.

New Interval The logger has switched to logging at the

burst logging rate or back to the normal rate.

Water Detect The logger has been placed in water or

removed from water.

Power Warn The battery level dropped below 2.3 V.

Safe Shutdown The battery level dropped below a safe

operating voltage and performed a safe

shutdown.

Deploying and Mounting the Logger

Follow these guidelines for deploying and mounting the logger.

•You can deploy the logger by using the two mounting

tabs on the protective boot. Insert two screws through

the holes on the mounting tabs to affix the logger to a

flat surface. Insert cable ties through the rectangular

holes on both mounting tabs to attach the logger to a

pipe or pole.

Use cable ties with the slots; slot dimensions are

0.28 cm (0.11 in.) wide x 0.86 cm (0.34 in.) long

Use screws with the

round holes; hole

diameter is 0.38 cm

(0.15 in.)

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•Use nylon cord or other strong cable with any of the

holes on the mounting tabs. If wire is used to secure the

logger, make sure the wire loop is snug to the holes. Any

slack in the loop may cause excessive wear.

•When deploying in water, the logger should be

appropriately weighted, secured, and protected

depending on water conditions and desired

measurement location.

•If the TidbiT MX Temp 500 (MX2203) logger will be

exposed to sunlight in the deployment location, attach it

to a solar radiation shield (RS1 or M-RSA) using the solar

radiation shield bracket (MX2200-RS-BRACKET). Attach

the logger to the underside of the mounting plate as

shown. For more details on the solar radiation shield,

refer to the Solar Radiation Shield Installation Guide at

www.onsetcomp.com/manuals/rs1.

•Be careful of solvents. Check a materials compatibility

chart against the wetted materials listed in the

Specifications table before deploying the logger in

locations where untested solvents are present. The

TidbiT MX Temp 500 (MX2203) logger has an EPDM O-

ring, which is sensitive to polar solvents (acetone, keton),

and oils.

•The protective boot is designed with a magnetic button

that will interact with the reed switch located inside the

logger. This means you do not need to remove the boot

to start, stop, or wake up the logger (if On Button Push or

Bluetooth Always Off configuration settings have been

selected). If you remove the logger from the boot or if

the magnetic button in the boot is not working properly,

you must place a magnet on the logger where the reed

switch is located if you want to start or stop the logger

with a button push or wake the logger up. Leave the

magnet in place for 3 seconds to start or stop it or 1

second to wake it up.

Maintaining the Logger

•To clean the logger, remove the logger from the boot.

Rinse both the logger and the boot it in warm water. Use

a mild dishwashing detergent if necessary. Do not use

harsh chemicals, solvents, or abrasives.

•Periodically inspect the logger for biofouling if it is

deployed in water and clean as described above.

•Periodically inspect the O-ring on the inside of the

battery cover in the TidbiT MX Temp 400 (MX2203)

logger for cracks or tears and replace it if any are

detected (MX2203-ORING). See Battery Information for

steps on replacing the O-ring.

•Periodically inspect the boot for any cracks or tears and

replace it if necessary (BOOT-MX220x-XX).

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

www.onsetcomp.com.

Battery Information

The logger requires one CR2477 3V lithium battery (HRB-2477),

which is user-replaceable for the TidbiT MX Temp 400

(MX2203) and non-replaceable for the TidbiT MX Temp 5000

(MX2204). Battery life is 3 years, typical at 25°C (77°F)

with a

logging interval of 1 minute and Bluetooth Always On selected

or 5 years, typical at 25°C (77°F)

when the logger is configured

with Bluetooth Always Off or Bluetooth Off Water Detect

selected. Expected battery life varies based on the ambient

temperature where the logger is deployed, the logging interval,

the frequency of connections, downloads, and paging, and the

use of burst mode or statistics logging. Deployments in

extremely cold or hot temperatures or a 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 replace the battery in the TidbiT MX Temp 400 (MX2203)

logger:

1. Remove the logger from the boot.

2. While pushing down on the back of the logger, rotate the

cover counterclockwise. If your cover has lock icons, rotate

it so that the icon moves from the locked to unlocked

position. The unlocked icon will then line up with the

double-ridge on the side of the logger case (pointed out in

step 3).

3. Use the small tab on the cover to lift it off the logger.

Use this tab to

lift the cover off

Place a magnet

here to act as a

button when the

logger is removed

from the boot

Double-ridge

aligned with

unlock icon

HOBO TidbiT MX Temp 400 (MX2203) and Temp 5000 (MX2204) Logger Manual

1-800-LOGGERS 8 www.onsetcomp.com

4. Remove the battery and place a new one in the battery

holder, positive side facing up.

5. Inspect the O-ring on the battery cover. Make sure it is

clean and seated properly. Remove any dirt, lint, hair, or

debris from the O-ring. If the O-ring has any cracks or tears,

replace it as follows:

a. Spread a small dot of silicone-based grease on the O-

ring with your fingers, making sure the entire O-ring

surface is completely covered in grease.

b. Place the O-ring on the cover and clean off any debris.

Make sure the O-ring is fully seated and level in the

groove and not pinched or twisted. This is necessary to

maintain a waterproof seal.

6. Place the cover back on the logger, lining up the unlock icon

(if applicable) with the double-ridge on the side of the

logger case (shown in step 3). Make sure the cover is level

as it is placed on the logger case to ensure the battery

terminal maintains its proper position.

Battery Cover Placement Top View

7. While pushing down on the cover, rotate it clockwise until

the tab is aligned with the double-ridge in the logger case. If

your cover has lock icons, then rotate it so that the icon

moves from the unlocked to locked position. When the

cover is properly positioned, the tab and the locked icon (if

applicable) will be aligned with the double-ridge in the

logger as shown.

8. Place the logger back in the protective boot, making sure

the double-ridge in the logger case slides into the groove on

the inside of the boot.

Note: MX2203 logger is shown in the example; the groove in

the boot on an MX2204 logger is in a slightly different location.

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.

Cover aligned properly

Place cover

straight down and

level on the back

of the logger

Battery Cover Side View,

Incorrect Assembly

Battery Cover Side View,

Correct Assembly

Make sure this double-ridge on the

logger slides into this groove on

the boot

HOBO TidbiT MX Temp 400 (MX2203) and Temp 5000 (MX2204) Logger Manual

1-800-LOGGERS (564-4377) • 508-759-9500

www.onsetcomp.com/support/contact

HOBOlink are trademarks or registered trademarks of Onset Computer Corporation. App Store and iPadOS are

service marks or registered trademarks 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 21537-L

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