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I.  INTRODUCTION

Congratulations  on  your  purchase  of  the 

Cobra. Please read the manual completely 

before first use. Keep the manual for fu-

ture reference. It is recommended to soak 

the electrode for at least 30 minutes be-

fore use to make the electrode wet.

Features:

• 

IP65 Waterproof

 housing

• 

Dual display

 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-only

 for calibration

II.  MATERIAL SUPPLIED

This package contains:

• 

The meter x 1

• 

CR2032 button battery x 2

• 

Manual 

III.  POWER SUPPLY

The meter is powered by 2 CR2032 bat-

teries. Check the battery:

1. before first use;

2. when  the  battery  symbol  appears  on 

the LCD screen;

3. when  the  meter  can  not  be  switched 

on.

Summary of Contents for COBRA pH pen

Page 1: ...COBRA pH pen MANUAL...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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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