Hach sension6, Инструкция по эксплуатации, Страница: 46 / 86

45
SECTION 3,
continued
3. Insert the probe into the sample to the desired depth. The
probe must be deep enough to cover the thermistor (metallic
button) located on the side of the probe.
4. Agitate the probe in the sample to dislodge air bubbles from
the sensing area of the probe tip.
5. Stir the sample vigorously with the probe or use a stir stand
and stir bar. When measuring deep bodies of water, create
sufficient flow across the probe tip by pulling on the cable to
move the probe up and down. When using a stir stand and
magnetic stir bar, increase the speed of the stir bar until the
displayed value no longer increases with the stirring rate.
6. When the reading on the meter stabilizes, record or store the
value in the meter memory.
7. Press the
CONC %
key on the keypad to change the display
from concentration in mg/L to % saturation.
Note: The displayed % saturation will be based on a meter calculation for
the equilibrium dissolved oxygen concentration. The calculation
uses the sample temperature, salinity, barometric pressure, altitude
and measured concentration in mg/L values. Changing the entries in
setups 4, 5 or 6 will alter the displayed mg/L or % saturation.
3.4.3 Display Backlight
In low light conditions, the backlight may be turned on by
pressing the light key on the keypad. The light will turn off when
the instrument automatically shuts off, or when the user turns the
instrument off. Pressing the light key a second time will also turn
the light off.
3.4.4 Probe Storage
To store the probe between measurements, insert the DO probe
tip into the calibration and storage chamber containing some
water or a wet sponge.
To prepare the probe for long-term storage (see Figure 7 on
page 37 ) complete the following steps:
1. Disconnect the probe from the meter.
2. Remove the batteries from the meter.