HOBO MX Temp/RH Data Logger (MX1101) Manual
1-800-LOGGERS 6
www.onsetcomp.com
audible alarm is cleared, a visual alarm may remain on
the logger LCD and in the app depending on the settings
selected for maintaining visual alarms or because the
alarm condition may still be in effect. In addition, an
audible alarm will continue beeping when the sensor
values have returned to the normal range until it is
cleared as described in step 8.
•
Although an audible alarm and a visual alarm can occur
at the same time when a sensor alarm is tripped, they are
cleared in different ways. The audible alarm can be
cleared as described in step 8. Meanwhile, a visual alarm
is cleared as determined by the setting selected for
Maintain Visual Alarm Until configuration setting. This
means you could clear a beeping audible alarm and the
visual alarm will remain on the LCD and in the app until
the logger is reconfigured, the sensor is in limits, or the
alarm button is pressed--whichever setting you selected.
•
If the logger was configured to stop logging with a button
push, any tripped alarms will be cleared automatically
when logging is stopped and no Alarm Cleared event will
be logged. This ensures that the logger will start checking
for alarm conditions when logging resumes (if the logger
was configured with Allow Button Restart selected).
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 Devices. Tap the logger in the app to connect to it and
tap .
2.
Tap Logging Mode and then tap Burst Logging.
3.
Select Low and/or High and either type or drag the slider to
set the low and/or high values.
4.
Repeat step 3 for the other sensor if desired.
5.
Set the burst logging interval, which must be faster than the
logging interval. Keep in mind that the more frequent the
burst logging rate, the greater the impact on battery life
and the shorter the logging duration.
6.
Tap Save.
7.
Tap .
Notes:
•
The high and low burst limits are only checked when the
logger's LCD screen refreshes once every 15 seconds.
Therefore, if you set the logging interval to less than 15
seconds and the sensor reading falls outside the levels,
the burst logging will not begin until the next 15-second
refresh cycle.
•
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.
•
Burst logging mode can begin or end when the sensor
reading is within the resolution specifications. 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 in normal mode. For example, a 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. The logger
will check the high and low conditions when logging
resumes (if the logger was configured with Allow Button
Restart selected).
Statistics Logging
During fixed 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 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
