Hach sension6 Reference guide

51850-23
DO METER QUICK REFERENCE CARD
Table 1 Changing Meter Setup Options
Setup How To Get There Description of Option
1 Turn the meter on and press
SETUP/CE. Press READ/ENTER.Display continuous dissolved oxygen readings or lock the reading when the value stabilizes. READ/ENTER toggles
between the options. Press EXIT when selection is
complete.
2 Turn the meter on and press
SETUP/CE. Press the up arrow
once.
Use Metric (°C, mm Hg, meters) or English (°F, in. Hg, feet)
units by showing °C or °F. READ/ENTER toggles between
the options. Press EXIT when selection is complete.
3 Turn the meter on and press
SETUP/CE. Press the up arrow
twice.
Display D.O. concentrations in 0.0 mg/L or 0.00 mg/L
resolution. READ/ENTER toggles between the options.
Press EXIT when selection is complete.
4 Turn the meter on and press
SETUP/CE. Press the up arrow
three times. Press READ/ENTER.
Adjust the displayed D.O. concentration based on sample
salinity. Use the number keys to enter a salinity value
ranging from 0–42. Press READ/ENTER and then EXIT
when selection is complete.
5 Turn the meter on and press
SETUP/CE. Press the up arrow
four times. Press READ/ENTER.
Use the number keys to enter the barometric pressure.
Press READ/ENTER and then EXIT when selection is
complete. See
Table 2 below.
6 Turn the meter on and press
SETUP/CE. Press the up arrow
five times. Press READ/ENTER.
Use the number keys to enter the altitude.
Press READ/ENTER and then EXIT when selection is
complete. See
Table 2 below.
7 Turn the meter on and press
SETUP/CE. Press the up arrow six
times. Press READ/ENTER.
Use the number keys to enter the time.
Press READ/ENTER and then EXIT when selection is
complete.
8 Turn the meter on and press
SETUP/CE. Press the up arrow
seven times. Press READ/ENTER.
Use the number keys to enter the date.
Press READ/ENTER and then EXIT when selection is
complete.
9 Turn the meter on and press
SETUP/CE. Press the up arrow
eight times. Press READ/ENTER.
Use the number keys to enter the year.
Press READ/ENTER and then EXIT when selection is
complete.
10 Turn the meter on and press
SETUP/CE. Press the up arrow
nine times. Press READ/ENTER.
Use the arrow keys to select time intervals for automatic
data transfer. Press READ/ENTER and then EXIT when
selection is complete.
Table 2 Adjusting Barometric Pressure and Altitude
Enter a new barometric pressure when the barometric pressure or the instrument altitude changes.
Using Sea Level Equivalent Using True Barometric Pressure
1. Obtain the sea level equivalent barometric
pressure from TV, radio, or a local airport. 1. Obtain the true barometric pressure from a nearby mercury barometer or use
Table 11 on
page
74 of the manual.
2. Enter this value into the meter in Setup 5. 2. Enter this value into the meter in Setup 5 or
during calibration.
3. Enter the local altitude in Setup 6. 3. Enter the altitude as 0feet or meters.

CALIBRATION IN WATER SATURATED AIR
Note: Zero the sens ion6 DissolvedOxygen meter only when measuring dissolved oxygen levels less than 1
mg/L or 10% saturation. When measuring in this range, zero the meter prior to calibration.
1. Secure the probe cable to the calibration and storage chamber by wrapping cable through the
bottom of the chamber lid before filling with water.
2. Prepare the calibration and storage chamber by holding it under water and squeezing it a
couple of times to pull a small amount of water into the lower chamber through the inlet.
Alternately, open the bottom of the chamber and insert a water-soaked sponge.
Note: Avoid completely filling the lower chamber with water.
3. Insert the DO probe into the calibration and storage chamber. The tip of the probe must not be
flooded with water or be holding a drop of water on the membrane.
4. Allow at least ten minutes for the atmosphere in the chamber to reach a steady state.
Note: Gently squeeze the lower chamber to force water-saturated air into the probe compartment to speed
stabilization.
Note: Keep the DO probe at a uniform temperature. When holding the probe, do not touch the metallic button
on the side of the probe. The button is a thermistor that senses temperature. An inaccurate calibration
will result if the temperature of the thermistor is different from the probe membrane.
5. Press the CAL key located in the lower left corner of the keypad.
6. The main display will show the current value for the barometric pressure. If the meter has been
moved to a different elevation or if the barometric pressure has changed, enter the new value.
7. Press the READ/ENTER key. The display will show the current value for the altitude. Use the
keypad to enter the altitude of the meter.
Note: If the true barometric pressure has just been entered, the altitude has to be set to 0 meters (0 feet) or
inaccurate calibration may result.
8. When the altitude is correct in combination with the barometric pressure, press the
READ/ENTER key. The current value for the sample salinity (0/00) will be shown.
a. Since this calibration is performed in water-saturated air, set the salinity to zero.
b. If necessary, use the keypad to enter a salinity value of 0 0/00.
c. Press the READ/ENTER key. The display will show 100%.
d. Press the READ/ENTER key. The stabilizing icon will appear during the calibration.
9. When the calibration is complete, the meter will return to the read mode. Press the EXIT key
during the calibration sequence to back out of the calibration routine, one screen
one-at-a-time, without completing a calibration.
© Hach Company, 1999. All rights reserved. Printed in the U.S.A ap/dk 5/99