Hach-Lange H170 User Manual - Manual (Page 13)

7. If the pH buffer is not correct, use the arrow keys to select another buffer.
8. 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.
9. The meter beeps three times when a calibration is complete. "CAL 3" and the next pH buffer
value (default = 4.01) flashes on the display.
10. Rinse the probe in deionized water. Put the probe in the second buffer solution.
11. If OK, push ENTER, or use the arrow keys to change the value. Push pH to accept a 1-point
calibration and to go back to the pH measurement mode. If ENTER is selected, the buffer value
flashes until calibration is complete.
12. If the meter is set for a 2-point calibration, the meter beeps three times when the calibration is
complete. The display shows the slope, the mV offset at pH 7.00 and the number of calibration
points. Review the calibration data, then push pH or STORE to start reading the pH value of
another solution.
13. If the meter is setup for a 3-point calibration, do steps 1 through 12 until all the calibration points
are set.
Set the conductivity and TDS options
Set the options for conductivity and TDS: conductivity calibration points, conductivity temperature
compensation, conductivity temperature, cell constant, TDS conversion factor, TDS units and salinity
units in ppm or as a percentage. Complete the operations in order:
1. Set the power to on.
2. Push SETUP, then COND or TDS to put the meter in conductivity or TDS setup modes.
3. Use the arrow keys to select an option, then push ENTER:
Operation Function
Conductivity calibration point Keeps up to five calibration points.
• Use the arrow keys to select each option, then push
ENTER.
• The first active calibration point shows. Use the
arrow keys to see other in-use values.
Note: "- - - -" shows on the display if there are no stored
conductivity calibration points.
Conductivity temperature 1
• Shows the conductivity normalization value.
• Use the display settings between 20 to 25 °C
(default = 25 °C).
Conductivity probe cell constant The cell constant is automatically found and shown on
the display. Sets the cell constants to:
• K = 0.5 for general procedures
• K = 1 for low conductivity procedures (e.g., drinking
water)
• K = 10 for salinity or brackish water
• If no conductivity probe is attached, the display
shows "000."
TDS conversion factor
• TDS values are related to conductivity. Calibrate
with a TDS standard or with conductivity standards,
then set the meter with a conversion factor.
• Sets the conversion factor to 0.40 to 1.00 (default =
0.50).
English 13