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9

VIII. AUTOMATIC  TEMPERATURE  COM-

PENSATION (ATC) & TEMP. UNIT SET-

TING

The  Cobra  is  capable  of  measuring  with 

Automatic  Temperature  Compensation.  

“ATC”  will  show  in  the  middle  top  of  the 

LCD.  

Temp. Unit Setting of the Cobra:

To  select  the  temp.  unit  (°C  or  °F),  turn 

off the meter first. When the meter is off, 

press “ 

 ” and “ 

CAL

 ” at the same time 

until the C or F appears on the LCD. Press 

“ 

HOLD

  ”  to  select  the  preferred  unit  and 

then press “ 

CAL

 ” to save. “ 

SA

 ” will ap-

pear on the LCD for one second and then 

the LCD screen will go back to normal.

IX.  CALIBRATION MODE (CAL)

Calibration  is  necessary  and  should  be 

done regularly. It is recommended to cali-

brate every day if the meter is used often. 

The unique calibration design of the me-

ter features an automatic buffer recogni-

tion to avoid errors.

o

C

Содержание COBRA pH pen

Страница 1: ...COBRA pH pen MANUAL...

Страница 2: ...with ATC Data hold to freeze readings Compact size easily fits in your pocket Low battery indicator Auto power off C F unit switchable Power by 2 CR2032 batteries Multi point calibration One touch on...

Страница 3: ...ace the old batteries with 2 new button cells CR2032 4 Make sure the batteries are in place and the polarity is correct 5 Put back the battery cover and turn it in counter clockwise direction to lock...

Страница 4: ...pensation H Data hold V KEYPAD VI HOW TO OPERATE 1 Remove the probe storage bottle from meter to expose the electrode It is nor mal to find white crystals on the cap or electrode assembly WARNING alwa...

Страница 5: ...ode The LCD not only shows the measured pH value but also displays the temperature 4 Press HOLD to freeze current read ings The H icon will appear on the LCD and the small dot will not flash Press HOL...

Страница 6: ...SLEEP FUNCTION This meter will turn off automatically af ter 20 minutes of inactivity If you want to operate for a longer time you can disable the sleep mode To disable the auto power off Before turn...

Страница 7: ...is off press and CAL at the same time until the C or F appears on the LCD Press HOLD to select the preferred unit and then press CAL to save SA will ap pear on the LCD for one second and then the LCD...

Страница 8: ...played on the LCD screen 4 If the probe or buffer display an error the buffer is incorrectly inserted the probe is damaged the probe can not detect the buffer in below voltage range The meter will exi...

Страница 9: ...For 7 0pH is from 6 50 to 7 50 For 10 0pH is from 9 50 to 10 50 7 To save the calibration value When the electrode reads a stable value and the user is not pressing any key the meter will automaticall...

Страница 10: ...lvent immiscible with water clean it with a solvent miscible with water e g etha nol or acetone and rinse carefully with water Store the electrode carefully XI TROUBLESHOOTING Power on but no display...

Страница 11: ...ut of temp range too cold or too hot pH value fluctuate quickly This is normal when the electrode is not immersed in water but exposed to air XII SPECIFICATIONS Operating Temp 0 50 C 32 122 F Operatin...

Страница 12: ...tion tampering neglect im proper maintenance or damage resulting from leaking batteries Proof of purchase is required for warranty repairs Warranty is void if the meter used has been taken apart XIV R...

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