HOBO Pendant MX Temp (MX2201) and Temp/Light (MX2202) Logger Manual
1-508-759-9500 (U.S. and International) 4
www.onsetcomp.com
1-800-LOGGERS (U.S. only)
8.
Tap Pause Options, then select Pause On Button Push to
specify that you can pause the logger by pressing its button
for 3 seconds.
9.
Tap Logging Mode. Select either Fixed or Burst logging.
Fixed logging records data for all enabled sensors and/or
selected statistics at the logging interval selected (see
Statistics Logging
for details on choosing statistics options).
Burst mode logs at a different interval when a specified
condition is met. See
Burst Logging
for more information.
10.
Enable or disable Show LED. If Show LED is disabled, the
alarm and status LEDs on the logger do not illuminate while
logging (the alarm LED does 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.
Enable or disable Bluetooth Always On. When this option is
enabled, the logger advertises or regularly sends out a
Bluetooth signal for the phone, tablet, or computer to find
via the app while it is logging, which uses battery power.
When this option is disabled, the logger advertises only
during logging when you press the circle button on the
logger to wake it up. This preserves battery power.
12.
Upload Data Via allows you to specify whether to upload
data to HOBOlink using a HOBO Gateway or HOBOconnect.
13.
For the Pendant MX Temp/Light (MX2202) logger, both the
temperature and light sensors are enabled by default.
Disable one if desired by tapping to toggle it to the off
position.
14.
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.
15.
Tap Start to save the configuration settings and start
logging.
Logging begins based on the settings you specified. See
Deploying and Mounting the Logger
for details on mounting
and see
Downloading Data From the Logger
for details on
downloading.
Setting up Alarms
You can set up alarms for the logger that trip when a sensor
reading rises above or falls below a specified value. The logger
alarm LED blinks and an alarm icon appears in the app. This
alerts you to problems so you can take corrective action.
To set an alarm:
1.
Tap Devices. Press the button
on the logger
to wake it up, if
necessary.
2.
Tap the logger in the app to connect to it and tap Configure
& Start.
3.
Tap a Sensor/Channel.
4.
Tap Enable Logging, if necessary.
5.
Tap Alarms to open that area of the screen.
6.
Select Low if you want an alarm to trip when the sensor
reading falls below the low alarm value. Enter a value to set
the low alarm value.
7.
Select High if you want an alarm to trip when the sensor
reading rises above the high alarm value. Enter a value to
set the high alarm value.
8.
For the Duration, select how much time should elapse
before the alarm trips and select one of the following:
•
Cumulative Samples. The alarm trips 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 trips once the sensor readings have been
above 85°F for a total of 30 minutes since the logger was
configured.
•
Consecutive Samples. The alarm trips 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 trips only if all sensor readings are 85°F or above
for a continuous 30-minute period.
9.
Repeat steps 3–8 for the other sensor if desired. Note that
when both alarms are configured, an alarm is raised when
either sensor is in an alarm condition.
10.
In the Alarm Settings area, select one of the following
options to determine how the alarms are cleared:
•
Logger Reconfigured.
The alarm indication appears until
the next time the logger is reconfigured.
•
Sensor in Limits.
The alarm icon indication appears until
the sensor reading returns to the normal range between
any configured high and low alarm limits.
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
clears when the readings return to normal if you selected
Sensor in Limits in step 10. Otherwise, the alarm state remains
in place until the logger is reconfigured.
Notes:
•
The logger checks alarm limits at every logging interval.
For example, if the logging interval is set to 5 minutes,
the logger checks 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. In addition,
alarms can trip or clear when the sensor reading is within
the resolution specifications.
•
When you download data from 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
below 32°F (the low limit). This means the logger records 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 switches to the faster logging rate and records 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,
the logger switches to burst logging mode again and records
