Hach-Lange H170 User Manual - Manual (Page 12)

Operation Function
pH resolution Sets the pH resolution to 0.1 or 0.01 pH. The stabilization lock (the "READY" icon) is
faster at a 0.1 pH resolution.
Set the 2 or 3-point pH
calibration Shows the current number of calibration points. Use the arrow keys to set the
calibration points.
pH calibration method
• Sets the pH buffer. The default is a 2-point calibration (pH 7.00 then pH 4.00).
• Push ENTER again to set the first calibration buffer. The display shows the next
buffer. Do this procedure until all buffers are set. Previously-selected buffers do not
show.
4. Push ENTER to keep the changes and go back to setup mode.
Note: To exit and not keep the changes, push SETUP.
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
Set the
manual temperature compensation for glass electrodes .
pH buffer values at various temperatures
25 ºC 0 ºC 5 ºC 10 ºC 20 ºC 30 ºC 40 ºC 50 ºC
1.68 1.67 1.67 1.67 1.67 1.68 1.69 1.71
4.01 4.00 4.00 4.00 4.00 4.01 4.03 4.06
6.86 6.98 6.95 6.92 6.87 6.85 6.84 6.83
7.00 7.12 7.09 7.06 7.01 6.99 6.97 6.97
9.18 9.46 9.40 9.33 9.23 9.14 9.07 9.02
10.01 10.32 10.25 10.18 10.06 9.97 9.98 9.83
12.45 13.42 13.21 13.00 12.63 12.29 12.04 11.70
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-or 3-point calibrations. The default is a 2-point calibration.
1. Set the power to on.
2. Connect the probe to the meter.
3. Push pH to put the meter in pH mode.
4. Put the probe in the buffer solution.
Note: To erase all previous calibration points, slopes and offsets, push CAL, then SELECT. To update a
previous calibration with a single-point calibration, ignore this step.
5. Push CAL, then the "CAL" icon flashes on the display.
Note: Stop a calibration when the pH value is in flash mode. Push pH or SETUP to go back to the
measurement mode.
6. If the buffer is correct, push ENTER, then the pH buffer flashes until the calibration is complete.
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