Onset MX2200 Data sheet

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

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 HOBOmobile® 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.

MX2203 Model Shown

HOBO TidbiT MX Temp
Logger

Models:

• MX Temp 400 (MX2203)

• MX Temp 5000

(MX2204)

Items included:

• Protective boot

Required Items:

• HOBOmobile app

• Device with iOS or

Android™ and Bluetooth

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-MX220x­BK), or white (BOOT­MX220x-WH)

Specifications

Temperature Sensor

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

Accuracy

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;

Logger

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

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

Waterproof MX2203: To 122 m (400 ft)

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

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

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

Memory 96,000 measurements

l

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)

±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)

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

MX2204: 7.6 g (0.27 oz) negative

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

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).

MX2204

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.

21537-B

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

W

Specifications (continued)

Full Memory Download
Time

Wetted Materials MX2203: Polypropylene case, EPDM O-ring, stainless steel screws,

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

eight MX2203: 36.2 g (1.28 oz)

Logger Components and Operation

Protective
Boot

Status LED

Magnetic

Start Button

Mounting Tab

Reed Switch (Internal)

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 built­in 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

Alarm LED

Temperature
Sensor
(Internal)

Water-Detection
Screws

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

Santoprene® (TPE) boot
MX2204: Epoxy case, Santoprene (TPE) boot

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

MX2204: 32.8 g (1.16 oz)

The CE Marking identifies this product as complying with all relevant
directives in the European Union (EU).

See last page

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 Page Logger LED in
the HOBOmobile app, both LEDs will be illuminated for 5
seconds.

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 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. Tap the HOBOs icon at the bottom 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.

• If the logger was configured with Bluetooth Always Off

(see Configuring the Logger), make sure the logger is
“awake” by pressing the magnetic start button for 1
second. 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. If

1-800-LOGGERS 2 www.onsetcomp.com

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

the logger 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.

• 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-of­sight.

• 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 list, but you cannot connect

to it, close HOBOmobile and power cycle the mobile
device. This forces the previous Bluetooth connection to
close.

Once the logger is connected, 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.

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 configure 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 interval, start and stop logging options, and configuring
alarms. These steps provide an overview of setting up the
logger. For complete details, see the HOBOmobile User’s Guide.

1. Open HOBOmobile and tap the HOBOs icon.

2. Find the logger in the list and tap it to connect to it. 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 (and the logger
name will turn green). Note that the current sensor
readings are displayed even when the logger is not logging.

3. Once connected, tap Configure.

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

configuration settings currently selected for the logger.

• Start Logging. Start recording data (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 other Stop Logging settings that may be
configured.

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

the alarm and status LEDs for 5 seconds.

• Logger Password. Create a password for the logger that

will be required if another mobile device attempts to
connect to it. To reset a password, connect 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 the 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 HOBOs list. Connect to the
logger and select Restore Logger (or Update Firmware if

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 up to
20 characters (optional). Tap Done.

6. Tap Logging Interval and choose how frequently the logger
will record data.

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

1-800-LOGGERS 3 www.onsetcomp.com