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HOBO Pendant MX Temp (MX2201) and Temp/Light (MX2202) Logger Manual 

1-800-LOGGERS 8 

Solar Radiation Shield Installation Guide

 

 

When measuring light intensity outdoors or underwater, 
make sure the MX2302 logger is mounted horizontally so 
that the light sensor is pointing straight up towards the 
sky as shown in this example. 

 

 

Be careful of solvents. Check a materials compatibility 
chart against the wetted materials listed in the 
Specifications table before deploying the logger in 
locations where untested solvents are present. The 
logger has an EPDM O-ring, which is sensitive to polar 
solvents (acetone, keton) and oils. 

Maintaining the Logger 

 

To clean the logger, rinse it in warm water. Use a mild 
dishwashing detergent if necessary. Do not use harsh 
chemicals, solvents, or abrasives. 

 

Periodically inspect the logger for biofouling if it is 
deployed in water and clean as described. 

 

Periodically inspect the O-ring on the inside of the 
battery cover for cracks or tears and replace it if any are 
detected (MX2201-02-ORING). See 

Battery Information

 

for steps on replacing the O-ring. 

Protecting the Logger 

Note:

 

Static electricity may cause the logger to stop logging.

 

The logger has been tested to 8 KV, but avoid electrostatic 
discharge by grounding yourself to protect the logger. For more 
information, search for “static discharge”

Battery Information 

The logger requires one user-replaceable CR2032 3V lithium 
battery. Battery life is 1 year typical at 25°C (77°F)

 

with a 

logging interval of 1 minute and Bluetooth Always Off disabled 

or 2 years typical at 25°C (77°F)

 

when the logger is configured 

with Bluetooth Always Off enabled. Expected battery life varies 
based on the ambient temperature where the logger is 
deployed, the logging interval, the frequency of connections, 
downloads, and paging, and the use of burst mode or statistics 
logging. Deployments in extremely cold or hot temperatures or 
a logging interval faster than one minute can impact battery 
life. Estimates are not guaranteed due to uncertainties in initial 
battery conditions and operating environment. 

To replace the battery: 

1.

 

While pushing down with both thumbs on the back of the 
logger, rotate the battery cover counterclockwise until it 
stops moving (about a 1/8 turn). 

 

2.

 

Use the edge below the arrow on the cover to lift it off the 
logger. 

 

3.

 

Remove the battery and place a new one in the battery 
holder, positive side facing up. Use a small flat-head 
screwdriver to carefully pop the battery out of its holder as 
shown. 

 

4.

 

Inspect the O-ring on the battery cover. Make sure it is 
clean and seated properly. Remove any dirt, lint, hair, or 
debris from the O-ring. If the O-ring has any cracks or tears, 
replace it as follows: 

a.

 

Spread a small dot of silicone-based grease on the O-
ring with your fingers, making sure the entire O-ring 
surface is completely covered in grease. 

b.

 

Place the O-ring on the cover and clean off any debris. 
Make sure the O-ring is fully seated and level in the 
groove and not pinched or twisted. This is necessary to 
maintain a waterproof seal. 

 

 

Use this edge to 
lift the cover off 

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Summary of Contents for Pendant MX Temp

Page 1: ...positive Waterproof To 30 5 m 100 ft Radio Power 1 mW 0 dBm Transmission Range Approximately 30 5 m 100 ft line of sight Wireless Data Standard Bluetooth Low Energy Bluetooth Smart Logging Rate 1 seco...

Page 2: ...stop logging Press this circle for 10 seconds to reset a password Note The circle on the front of the logger represents the button area on the logger You will not feel an actual button push when you p...

Page 3: ...ice attempts to connect to it To reset a password connect to the logger tap Set Logger Passkey and select Reset to Factory Default You can also press the circle on the logger for 10 seconds to reset t...

Page 4: ...interval selected see Statistics Logging for details on choosing statistics options In burst mode logging occurs at a different interval when a specified condition is met See Burst Logging for more i...

Page 5: ...hat triggers the alarm may differ slightly than the value entered For example if the High Alarm is set to 75 999 F the alarm can trip when the sensor reading is 75 994 F which is within the range of t...

Page 6: ...or lowest sampled value An average of all sampled values and The standard deviation from the average for all sampled values For example a Pendant MX Temp Light MX2202 logger is configured with both t...

Page 7: ...ng events to track logger operation and status To plot events in HOBOmobile tap a mini graph and then tap Select the events you wish to plot and then tap again You can also view events in shared or ex...

Page 8: ...nterval of 1 minute and Bluetooth Always Off disabled or 2 years typical at 25 C 77 F when the logger is configured with Bluetooth Always Off enabled Expected battery life varies based on the ambient...

Page 9: ...n If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interferen...

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