Set The Manual Temperature Compensation; Calibrate For Ph Measurement - Hach H160G User Manual

Set the manual temperature compensation

Glass pH electrodes are automatically temperature compensated if a temperature probe is sensed in
the 3.5 mm phono jack. If no probe is sensed, the meter defaults to the manual temperature
compensation at 25.0 ºC. Manual temperature compensation is always in ºC. Refer to
manual temperature compensation for glass
pH buffer values at various temperatures
25 ºC 0 ºC
1.68 1.67
4.01 4.00
6.86 6.98
7.00 7.12
9.18 9.46
10.01 10.32
12.45 13.42
1. Push SETUP, then pH to put into pH setup mode.
2. Use the arrow keys until the manual temperature shows "- - -.- ºC" on the display.
3. Push ENTER to see the manual temperature value.
4. Use the arrow keys to set the manual temperature compensation.
5. Push ENTER to keep the changes and go back to setup mode.
Note: To exit and not keep the changes, push SETUP.

Calibrate for pH measurement

The meter accepts 1, 2, 3, 4 and 5-point calibrations. The default is a 2-point calibration. If
necessary, a system administrator or a user can set the sequence of buffers and numbers of
calibration points.
1. Push pH to put the meter in pH mode.
2. Put the probe in the buffer solution.
Note: To erase all previous calibration points, slopes and offset, push CAL, then DELETE. To update a
previous calibration with a single-point calibration, ignore this step.
3. Push CAL, then the "CAL" icon flashes on the display.
Note: The user can stop a calibration when the pH value is in flash mode. Push pH or CANCEL to go back to
the measurement mode.
4. If the buffer is not correct, push ENTER, then the pH buffer flashes on the main display until the
calibration is complete.
5. If the pH buffer is incorrect, use the arrow keys to select another buffer.
6. Use the arrow keys to see the buffers: 1.68, 4.01, 6.86, 7.00, 9.18, 10.01 and 12.45. During "CAL
2" or "CAL 3", the meter ignores the values used in previous calibrations.
7. The meter beeps three times when a calibration is complete. CAL 3 and the next pH buffer value
(the default is 4.01) flashes on the display.
8. Rinse the probe in deionized water and put in the second buffer solution.
*
The slope is the change in potential when the pH reading changes by one decade, (e.g., from pH
7.00 to pH 8.00). The % slope is the ratio of the measured slope and the theoretical Nerst slope
of 59.16 mV per decade of pH change at 25 ºC. If the slope on a BNC electrode is not between
85 to 102%, the meter shows the error code: E04. If the calibration is more than two points, the
slope that shows is the average slope for all points. The meter will show E03, if the offset from
0.0 mV in pH 7.00 is larger than ±30 mV. Refer to
20 English
electrodes.
5 ºC 10 ºC
1.67 1.67
4.00 4.00
6.95 6.92
7.09 7.06
9.40 9.33
10.25 10.18
13.21 13.00
*
20 ºC 30 ºC
1.67 1.68
4.00 4.01
6.87 6.85
7.01 6.99
9.23 9.14
10.06 9.97
12.63 12.29
Error codes on page 29.
Set the
40 ºC 50 ºC
1.69 1.71
4.03 4.06
6.84 6.83
6.97 6.97
9.07 9.02
9.98 9.83
12.04 11.70