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HOBO MX pH and Temperature Logger (MX2501) Manual 

U.S. and International Sales: 1-508-759-9500 11 

www.onsetcomp.com 

To install or replace the battery: 

1.

 

Wipe the logger clean and dry it completely. 

2.

 

Unscrew the closure cap on the mounting end of the logger. 

 

3.

 

Pull the mounting end cap and attached battery holder 
straight out from the logger body without twisting. Insert a 
screwdriver through the mounting hole if you need 
additional leverage for removing the mounting end cap 
from the logger. 

 

4.

 

Remove the battery strap. Insert a flat-head screwdriver 
into the hole on the strap to lift it off the battery. 

 

5.

 

Remove the battery and install a new one, observing 
polarity. 

6.

 

Using your finger, spread a small dot of silicone-based 
grease along both O-rings (shown in step 4) on the 
mounting end cap. 

7.

 

Place the battery strap back in place, using the notches on 
both sides of the holder (shown in step 4) to align it and 
guide it into place until you hear a click. 

8.

 

Reinstall the battery holder and attached mounting end 
cap. Use the alignment tab on the battery holder (shown in 
step 4) and the arrow on the logger housing as a guide as 
you fit the small tab in the mounting end cap into the small 
groove on the logger housing. Do not twist or turn the 
mounting end cap as you push it straight into position. 

 

 

9.

 

Screw the closure cap back on the logger. 

 

WARNING:

 Do not cut open, incinerate, heat above 85°C 

(185°F), or recharge the lithium battery. The battery may 
explode if the logger is exposed to extreme heat or conditions 
that could damage or destroy the battery case. Do not dispose 
of the logger or battery in fire. Do not expose the contents of 
the battery to water. Dispose of the battery according to local 
regulations for lithium batteries. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Unscrew the 
closure cap 

Pull the mounting 
end cap from the 
logger; insert a 
screwdriver for 
leverage 

Insert a flat-head screwdriver in 
this hole to remove the battery 
strap 

Notch to align battery strap 
(on both sides) 

Alignment tab 

O-rings 

Mounting end cap 
installed with 
correct alignment 

Push the end cap back into the 
logger, aligning small tab with 
groove on logger housing 

Содержание MX2501

Страница 1: ...ater Deionized water or water below 100 S cm may not be detected The water conductivity circuit may not reliably detect water that has frozen around the electrodes i e below 0 C 32 F Radio Power 1 mW...

Страница 2: ...n Union EU See last page Logger Components and Operation Anti Biofouling Copper Guard Use this guard to protect the pH electrode when deploying the logger in water prone to biofouling see Deploying an...

Страница 3: ...your mobile device or computer The range for successful wireless communication is approximately 30 5 m 100 ft in air with full line of sight Change the orientation of your device to ensure the antenn...

Страница 4: ...2 If you removed the clear storage cap screw the closure cap onto the logger 3 In the HOBOconnect app tap Devices 4 Remove the logger from water If the logger was previously configured with Bluetooth...

Страница 5: ...rt below of buffers and samples Temperature C F pH 4 01 Buffer pH 7 00 Buffer pH 10 00 Buffer 0 32 4 01 7 12 10 31 5 41 4 00 7 09 10 24 10 50 4 00 7 06 10 17 15 59 4 00 7 04 10 11 20 68 4 00 7 02 10 0...

Страница 6: ...owing Cumulative 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...

Страница 7: ...can be logged for each sensor The maximum or highest sampled value The minimum or lowest sampled value An average of all sampled values The standard deviation from the average for all sampled values...

Страница 8: ...bration End pH calibration ended while the logger was logging Calibration Cancel pH calibration was canceled while the logger was logging Calibration Values The slope and offset values that were set d...

Страница 9: ...solution with mild dishwashing soap Never touch the glass bulb inside the clear plastic end of the probe Always calibrate the logger after cleaning the pH electrode with anything other than distilled...

Страница 10: ...logger immediately screw the closure cap back on the logger and follow the instructions in Calibrating the Logger If you will not be calibrating or deploying the logger immediately a Pour storage sol...

Страница 11: ...8 Reinstall the battery holder and attached mounting end cap Use the alignment tab on the battery holder shown in step 4 and the arrow on the logger housing as a guide as you fit the small tab in the...

Страница 12: ...ny interference received including interference that may cause undesired operation FCC Caution Any changes or modifications not expressly approved by the party responsible for compliance could void th...

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