Laboratory pH meter

This is a Bench top pH meter, Portable pH meter, Online pH meter, Femaly type pH meter, Pocket type pH meter, Pen Type pH meter. the meter use to water analysis and Chemicals Analysis.

For use the pH meter. Remove the instrument from the packing material and examine it carefully to make sure that no damage has occurred during shipping. If there is any damage, please contact your local Hanna Instruments Office. Each instrument is supplied with:

Hanna HI2211 pH Meter CALIBRATION
Calibrate the instrument often, especially if high accuracy is required.
The instrument should be recalibrated:
• Whenever the pH electrode is replaced.
• At least once a week.
• After testing aggressive chemicals.
PREPARATION
Pour small quantities of the buffer solutions into clean beakers. If
possible use plastic or glass beakers to minimize any EMC interferences.
For accurate calibration and to minimize cross-contamination, use two
beakers for each buffer solution: one for rinsing the electrode and one for
calibration.
If you are measuring in the acidic range, use pH 7.01 as first buffer
and pH 4.01 as second buffer. If you are measuring in the alkaline
range, use pH 7.01 as first buffer and pH 10.01 or pH 9.18 as
second buffer.
PROCEDURE
Calibration has a choice of five memorized buffers: pH 4.01, 6.86,
7.01, 9.18 and 10.01.
It is recommended to perform a two-point calibration. However, onepoint calibration is also permitted by the instruments.
TWO-POINT CALIBRATION
• Submerge the pH electrode and the temperature probe approximately 4 cm (1½”) into a
buffer solution and stir gently. The temperature
probe should be close to the pH electrode.
• Press CAL. The “CAL” and “ ” messages will appear and
“7.01” buffer will be displayed on the secondary LCD.
• If necessary, press the ARROW keys to select a different buffer value.
• The “ ” symbol will blink on the LCD until the reading is stable.

• When the reading is stable and close to the selected buffer,
“READY” message will appear and “CFM” message will blink.
• Press CFM to confirm calibration.
• The calibrated value is then displayed on the
primary LCD and the secondary LCD will display
the second expected buffer value.
Note: The instruments will automatically skip the buffer used for the
first point. It also skips 6.86 if 7.01 buffer was used and vice
versa. Likewise, it will skip 9.18 if 10.01 buffer was used and
vice versa.
• After the first calibration point is confirmed,
immerse the pH electrode and the temperature
probe approximately 4 cm (1½”) into the
second buffer solution and stir gently. The
temperature probe should be close to the pH
electrode.
• If necessary, press the ARROW keys to select a different buffer value.
• The “ ” symbol will blink on the LCD until the reading is stable.
• When the reading is stable, “READY” message will appear and
“CFM” message will blink.
• Press CFM to confirm calibration. The instrument
will return to measurement mode.
Notes: • If the value measured by the meter is not close to the
selected buffer, “WRONG ” and “WRONG ” messages
will blink alternately. In this case check if the correct buffer
has been used, or regenerate the electrode by following the
cleaning procedure (see page 18). If necessary, change the
buffer or the electrode.
• The “WRONG” message and temperature value are displayed blinking if the temperature reading is out of the
defined temperature range of the buffer. Calibration cannot
be confirmed in this situation

• Press RANGE to display the temperature reading on the LCD during
calibration (HI 2211 only).
ONE-POINT CALIBRATION
• Proceed as described in “Two-point calibration” section.
• Press CAL after the first calibration point
was confirmed.
The instrument will return to measurement mode
and will memorize the one-point calibration data.
Note: Press and hold down CFM and then press CAL. The instrument
sets default calibration parameters, displays “CLR” message for a
few seconds and then returns to normal measurement mode.

Hanna pH meter Supplier in Bangladesh. Al-Noor Scientific Co. Dhaka, Bangladesh Contact No. 01727-255375