User Guide

the Standard 7.01 or the NIST 6.86 are the most appropriate for this

purpose even though both meters can be calibrated with any of the 5

memorized calibration solutions.

• Immerse the pH electrode into a pH buffer

solution (e.g. pH 6.86) and stir gently.

Note: the electrode should be submerged ap-

proximately 4 cm (1½") into the

solution. With the temperature probe

located as close to it as possible.

• Press the CAL key. The "CAL" and "

BUF

" indicators will be dis-

played. The secondary LCD will display one of the 5 buffers

(e.g."4.01").

• Press the

°C or Ð

°C°C

°C key until the secondary display changes

to the buffer (“6.86”).

• Once the electrode is submerged in the buffer solution, the LCD

will notify the user if the reading is not stable by an intermittent

"NOT READY". Only when the reading is stable, will it change to a

blinking "READY" and "CON".

• Press the CFM key to confirm the calibration. If the reading is not

close to the selected buffer, "WRONG

BUF

" and "WRONG " will

blink alternatively.

If the reading is close to the selected buffer, the meter stores the

reading (and adjusts the offset point). The buffer value is then

displayed on the primary LCD and the

secondary LCD will display another buffer

value (e.g."4.01").

HI 7006

CAL

BUF

CAL

BUF

CAL

BUF

WRONG

BUF

CFM

NOT READY

READY

CON