Here is the pH meter, start by hitting the ON button, LET THE METER WARM UP FOR 2-3 MINUTES.

1
Here is the pH meter, start by hitting the ON
button, LET THE METER WARM UP FOR 2-3 MINUTES.
2

• LEAVE THE ELECTRODE IN THE STORAGE SOLUTION UNTIL
  YOU ARE READY TO CALIBRATE. MAKE SURE YOU NEVER
  LEAVE IT OPEN TO THE AIR.

3

• Measure the temperature of one of the buffers
  (they should be very close to the same).

4

• Use the ?C and?C buttons to set the temperature
  equal to the buffer temperature.

5

• Rinse the pH probe with distilled water. Here is
  a glass tip probe- we also have probes with
  plastic collars around the glass tip.

6

• Dry the probe by blotting gently with a piece of
  tissue.

7

• Immerse the probe in pH 7 buffer and swirl
  gently.

8

• Push the CAL button (calibrate). Button must be
  pushed FIRMLY!

9

• Check the secondary pH display (lower right hand
  corner. This should read 7.01, if it doesnt,
  press the ?C and?C buttons until it reads 7.01.

10

• The meter will read NOT READY until the reading
  stabilizes.

11

• Wait for the meter to read READY.

12

• Push the CFM (confirm) button, the pH should
  change to match 7.01 (or close- the pH of the
  buffer may not be 7.01 at lab temperature).

13

• Remove the electrode and rinse with distilled
  water, dry and place in the pH 4 buffer. (Or pH
  10 if we will be measuring bases)

14

• Once again check the secondary pH display in the
  bottom right corner and make sure it reads 4.01.
  Adjust if necessary as before.

15

• Wait for the meter to read READY and press the
  CFM button again.

16

• Here is the reading after hitting CFM.

17

• Remove and rinse the probe- it is now ready to
  read your pH. Remember to put the probe back
  into the storage solution when you are done.
  This calibration needs to be done once per block.