HOBO MX Temp/RH Data Logger (MX1101) Manual
1-800-LOGGERS 7
www.onsetcomp.com
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 Devices. Tap the logger in the app to connect to it and
tap .
2.
Tap Logging Mode and then select Fixed Logging.
3.
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.
4.
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.
5.
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
more frequent the sampling rate, the greater the impact on
battery life.
6.
Tap Save.
7.
Tap .
Once logging begins, click the Alarm/Stats button on the logger
to cycle through the current maximum, minimum, average, and
standard deviation data on the LCD screen. Note that the logger
will always display the current sensor readings in the app even
if they are not being logged. You can plot the statistics series
once you read out the logger.
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. Tap the logger to connect to it.
2.
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,
simultaneously press both the Start/Stop button and the
Alarm/Stats button on the top of the logger for 3 seconds
or
connect to the logger and tap , then
, and tap Reset.
Reading Out the Logger
To offload data from the logger:
1.
Tap Devices. Tap the logger in the app to connect to it.
2.
Tap
. The logger will read out the data to the phone or
tablet.
3.
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 internal 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.
Internal Event Name
Definition
Host Connected
The logger was connected to the mobile
device.
Started
The Start/Stop button was pressed to begin
or resume logging.
Stopped
The logger received a command to stop
recording data (from the app or by pushing
the Start/Stop button).
Button Up/Button
Down
The Start/Stop button was pressed for
1 second.
Chan <#> Alarm
Tripped
A sensor alarm has tripped; <#> is the sensor
number, where 1 is temperature and 2 is RH.
Chan <#> Alarm
Cleared
A sensor alarm has cleared; <#> is the sensor
number, where 1 is temperature and 2 is RH.
This event also contains the value that was
furthest out of range for the sensor before
the alarm cleared, which is only available in a
shared or exported file.
New Interval
The logger has entered or exited burst
