HOBO MX Analog/Temp/RH/Light (MX1104) and MX 4-Channel Analog (MX1105) Manual
1-508-759-9500 (U.S. and International)
1-800-LOGGERS (564-4377) (U.S. only)
www.onsetcomp.com/support/contact
© 2019–2022 Onset Computer Corporation. All rights reserved. Onset, HOBO, HOBOconnect, and HOBOlink are
registered trademarks of Onset Computer Corporation. App Store, iPhone, iPad, and iPadOS are service marks or
registered trademarks of Apple Inc. Android and Google Play are trademarks of Google LLC. Windows is a registered
trademark of Microsoft Corporation. Bluetooth and Bluetooth Smart are registered trademarks of Bluetooth SIG,
Inc. All other trademarks are the property of their respective companies.
Patent #: 8,860,569
23968-H
•
For other external sensors, the sensor type is not
automatically detected. Enable the channel (if necessary)
and then tap it to enter a label (optional). Select the type
of sensor or cable from the list. Set up alarms and add
scaling if needed and then tap Save.
•
See
Working with External Sensors
and
Setting up Alarms
for additional details.
14.
Tap Start to save the configuration settings.
Logging begins based on the settings you selected. Deploy the
logger using the mounting materials (see
Mounting the Logger
).
After logging begins, you can download data from the logger at
any time (see
Downloading Data From the Logger
for details).
Note:
If an “Error Configuring Logger” message appears in the
app, an error occurred while loading the configure settings onto
the logger. Try reconfiguring the logger.
Working with External Sensors
The MX1104 has one analog sensor port and the MX1105 has
four analog sensor ports that can accept self-describing and
other external sensors. Refer to www.onsetcomp.com for a
current list of supported sensors.
To connect an external sensor:
1.
Make sure the logger is stopped.
2.
For self-describing sensors, insert the plug into an analog
sensor port as shown.
3.
For other external sensors, insert the sensor into an analog
sensor port and make sure it is firmly seated.
4.
If you need to connect a sensor to the sensor cable,
complete any wiring before logging begins. Refer to the
sensor or cable manual for more information on connecting
the sensor and wiring, if applicable.
5.
Tap Devices. Press either button on the logger to wake it up
(if necessary).
6.
Tap the logger tile in the app to connect to the logger and
tap Configure & Start.
7.
Make sure all external sensor channels are enabled.
8.
For self-describing sensors, the sensor type is automatically
detected. Tap the Sensor/Channel Name in the app to enter
a label (optional). To set up scaling (if it is present), tap
Scaling and then enter the Series Name, Unit, and values for
High and Low and then tap Save. See
Setting up Alarms
for
details on adding alarms.
For other external sensors, the sensor type is not
automatically detected. Tap the sensor and enable the
channel (if necessary). Enter a label (optional). Select the
type of sensor or cable from the list. To set up scaling (if it’s
present), tap Scaling and then enter the Series Name, Unit,
and values for High and Low and then tap Save. See
Setting
up Alarms
for details on adding alarms.
Notes:
•
For MX1104 loggers, an external sensor is channel 1. For
MX1105 loggers, the sensor channel number is listed
above the analog sensor port where the external sensor
is connected.
•
The configuration screen in the app automatically
updates to show when a sensor is disconnected or
connected.
•
Make sure you select the correct sensor type in the app if
you are not using self-describing sensors. If you select the
wrong type, incorrect data is logged. The app
automatically detects the sensor type only for self-
describing sensors.
•
If you disconnect a sensor or if it is not fully inserted into
the analog sensor port while the logger is logging, a
warning icon appears on the LCD and the logger beeps
once. Use the top button on the logger to view the
channel with the warning, which also displays dashes
instead of a valid current reading. Erroneous readings are
displayed in the app and logged depending on the
logging interval while the sensor is disconnected (e.g., if a
sensor is disconnected for 5 minutes and the logging
interval is set to 1 minute, there are 5 erroneous data
points while the sensor was disconnected). When the
sensor is reconnected, the warning icon clears, the
correct value replaces the dashes for the channel on the
LCD, and the correct readings are logged.
•
Do not swap out sensors or move sensors to empty ports
while the logger is logging. Stop the logger before making
any physical changes to the sensors.
•
If a warning icon appears for a self-describing sensor and
you have checked that the correct sensor is properly
installed, the sensor might be faulty. Contact Onset
Technical Support.
•
The 4-20mA input cable (SD-MA-420 or CABLE-4-20mA)
measures current from 0 to 20.1 mA. Do not expose it to
current above 20 mA or to negative current. Do not cut
off the end of the gray cable where it connects to the
blue and yellow wires as it contains the precision resistor
required for current measurement.
•
If you are using the SD-VOLT-2.5 or CABLE-2.5-STEREO
voltage input cable, the input line must not be exposed
Using the diagram on the
logger housing shown above as
reference, insert the plug into
the analog sensor port.
Turn the plug one-
quarter clockwise.
The flat part of the plug will be
facing up when properly installed.
a.
b.
c.
d.
