Electro-Chemical Devices (ECD) H10 - Manual (Page 9)

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stabilize, then press “Slope” key to calibrate. Once the
unit calibrates the third point and the unit will
automatically exit the calibration mode. The three point
calibration is complete.
6. The unit calculates and compensates for the pH
electrode slope deviation corresponding to the values of
the three calibration buffers. After calibration, press and
hold “Mea./Eff.” key for about 5 seconds to display the
new electrode efficiency.
Calibration with manual temperature compensation in
the pH NON‐AUTOLOCK mode
1. Turn the unit on. Press “Clear” key for 2 seconds, all LCD
elements will light up. The meter clears all calibration
values stored in internal memory.
2. Connect the pH electrode to the BNC connector of the
unit, “MAN” icon will light up. Press “Mode” key until “pH”
icon is on. The “STAND” icon will flash.
3. Rinse the pH probes in distilled water and immerse it in
the first buffer solution (either 7.00 or 6.86). Adjust the
temperature reading to that of the first buffer using the up
or down keys (0.0 to 60.0
Ԩ) before pressing the “Stand”
key. Then press and hold “Stand” key for 5 seconds to
calibrate. Once the unit calibrates the first point, the
“SLOPE” icon will flash. The unit is ready to be sloped at
the second buffer.
4. Rinse the pH probe in distilled water and immerse it in
the second buffer solution (either 4.00/4.01 or
9.18/10.01), then press “Slope” key to calibrate. Once the
unit calibrates the second point, the “SLOPE” icon will
flash. The unit is ready to be sloped at the third buffer.
[Note: To exit the calibration mode at this time, press the
“Mode” key. Dual point calibration is complete.]
5. Rinse the pH probe in distilled water and immerse it in
the third buffer solution (either 9.18/10.01 or 4.00/4.01),
then press “Slope” key to calibrate. Once the unit
calibrates the third point and the unit will automatically
exit the calibration mode. The three point calibration is
complete.
6. The unit calculates and compensates for the pH
electrode slope deviation corresponding to the values of
the three calibration buffers. After calibration, press and
hold “Mea./Eff.” key for about 5 seconds to display the
new electrode efficiency.
9
Operational Procedures
A. Buffer Set Selection
The Model H10 meter has two buffer sets: 7.00, 4.01, 10.01pH and
6.86, 4.00, 9.18pH. The meter is factory pre‐set at 7.00, 4.01 and
10.01pH. To change the buffer set, turn off the unit, then press and
hold the “Stand” key while turning on the unit again. [Note: There is
no need to repeat this procedure every time the unit is power up
unless one decides to change the buffer settings.]
B. pH Calibration
The Model H10 uses 2‐point or 3‐point calibration. The first point
must be 6.86/7.00, and the second point can either be 4.00/4.01 or
9.18 / 10.01.
Calibration with an ATC/Temp probe in the pH‐
AUTOLOCK mode
1. Turn the unit on. Press “Clear” key for 2 seconds, all LCD
elements will light up. The meter clears all calibration values
stored in internal memory.
2. Connect the pH electrode to the BNC connector and the
ATC/Temp probe to the ATC/Temp connector of the unit:
“ATC” icon will lit up. “pH” icon and “AUTO” icon light up.
The “STAND” icon will flash.
3. Rinse the pH and ATC/Temp probes in distilled water and
immerse them in the first buffer solution (either 7.00 or
6.86). Allow temperature reading to stabilize, then press and
hold “Stand” key for 5 seconds to calibrate. The “WAIT” icon
will flash until the unit detects a stable reading. Once the unit
calibrates the first point, the “SLOPE” icon will flash. The unit
is ready to be sloped in the second buffer.
4. Rinse the pH and ATC/Temp probe in distilled water and
immerse them in the second buffer solution (either 4.00/4.01
or 9.18/10.01). Allow temperature reading to stabilize, then
press “Slope” key to calibrate. The “WAIT” icon will flash until
the unit detects a stable reading. Once the unit calibrates the
second point, the “SLOPE” icon will flash. The unit is ready to
be sloped at the third buffer.