HOBO Pendant MX Temp (MX2201) and Temp/Light (MX2202) Logger Manual
1-800-LOGGERS 4
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options). In burst mode, logging occurs at a different
interval when a specified condition is met. See
Burst
Logging
for more information. Tap Save.
9.
Enable or disable Show LED. If Show LED is disabled, the
alarm and status LEDs on the logger will not be illuminated
while logging (the alarm LED will not blink if an alarm trips).
You can temporarily turn on LEDs when Show LED is
disabled by pressing the circle on the logger for 1 second.
10.
Enable or disable Bluetooth Always On. When this option is
enabled, the logger will “advertise” or regularly send out a
Bluetooth signal for the phone or tablet to find via the app
while it is logging, which uses battery power. When this
option is disabled, the logger will only advertise during
logging when you press the circle on the logger to wake it
up, thereby preserving as much battery power as possible.
11.
For the Pendant MX Temp/Light (MX2202) logger, both the
temperature and light sensors are enabled by default.
Disable one if desired.
12.
You can 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.
13.
Tap
to save the configuration settings.
Logging will begin based on the settings you selected. See
Deploying and Mounting the Logger
for details on mounting
and see
Reading Out the Logger
for details on downloading.
Setting up Alarms
You can set up alarms for the logger so that if a sensor reading
rises above or falls below a specified value, the logger alarm
LED will blink and an alarm icon will appear in the app. This can
alert you to problems so you can take corrective action.
To set an alarm:
1.
Tap Devices. Press the circle on the logger to wake it up (if
necessary).
2.
Tap the logger in the app to connect to it and tap
.
3.
Tap a sensor (tap the Enable Logging toggle if necessary).
4.
Select High if you want an alarm to trip when the sensor
reading rises above the high alarm value. Drag the slider or
type a value to set the high alarm value.
5.
Select Low if you want an alarm to trip when the sensor
reading falls below the low alarm value. Drag the slider or
type a value to set the low alarm value.
6.
For the Duration, select how much time should elapse
before the alarm trips and select one of the following:
•
Cumulative. The alarm will trip 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 will trip once the sensor readings have been above
85°F for a total of 30 minutes since the logger was
configured.
•
Consecutive. The alarm will trip 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 will only trip if all sensor readings are 85°F or
above for a continuous 30-minute period.
7.
Tap Save and repeat steps 3–7 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.
8.
In the configuration settings, select one of the following
options to determine how the alarm indications are cleared:
•
Logger Reconfigured.
The alarm indication will display
until the next time the logger is reconfigured.
•
Sensor in Limits.
The alarm icon indication will display
until the sensor reading returns to the normal range
between any configured high and low alarm limits.
9.
Tap .
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
will clear when the readings return to normal if you selected
Sensor in Limits in step 8. Otherwise, the alarm state will
remain in place until the logger is reconfigured.
Notes:
•
Alarm limits are checked at every logging interval. For
example, if the logging interval is set to 5 minutes, then
the logger will check 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 read out 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 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. Press the circle on the logger to wake it up (if
necessary).
2.
Tap the logger in the app to connect to it and tap
.
3.
Tap Logging Mode and then tap Burst Logging.
4.
Select Low and/or High and either type or drag the slider to
set the low and/or high values.
