Hach sension8, Руководство пользователя

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35
SECTION 3,
continued
7. Press the
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
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
ENTER
key. The display will show
100%
.
d. Press the
ENTER
key. The stabilizing icon will appear
while the meter completes 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.
To obtain a printout of the calibration conditions:
1. Press the
PRINT
key on the keypad immediately after a
calibration is completed. The printed value is the calculated
true pressure based on the pressure and altitude entries.
3.3.5 Calibration to a Known Dissolved Oxygen Concentration
The sens
ion
8 meter can be calibrated in a water sample of
known dissolved oxygen concentration. This procedure adjusts
for differences between this electrode method and an alternate
method such as a Winkler titration. These differences are most
prevalent in samples containing high concentrations of
dissolved substances.
High concentrations of dissolved substances can be corrected for
by entering a sample Salinity value. However, Salinity values