Sper scientific Large Display Conductivity Pen - 850037, Руководство пользователя, Страница: 41 / 56

41
9. Stir the probe gently to create a uniform
sample. Wait about 15 minutes for the
reading to stabilize.
10. The unit of measure
will flash on the LCD to
indicate that the pen is in
Measurement Mode. When
the reading is stable, the
unit of measure will stop
flashing.
Hold Function
1. Press
HLD
to freeze the
current readings on the
display. “Hold” will appear
on the LCD.
2. Press HLD again to release
the hold function.
Set the temperature coefficient to
the right value. The meter is factory
set to 2.1% per °C and this normally
can provide good results. See page
9 to set the temperature coefficient
if needed.
Select the normalization temperature.
The meter is factory set to 25 °C. If
you need to normalize the meter to
20 °C, see page 9
Rinse the probe with deionized or
distilled water before use to remove
any impurities adhering to the
electrode. If the meter is not
used for a long time, please soak the
probe more than 30 minutes to clear
up the lazy effect of probe.
Dip the probe into the sample. Make
sure there are no air bubbles trapped
in the slot of the probe. To remove
air bubbles, give the probe a gentle
stir. Making sure the electrode tip
is submerged when you stir it.
Stir the probe gently in the sample
to create a homogenous sample.
Allow a few seconds to reach temp.
equilibrium. (Wait about 15 minutes
can get a stable reading)
for the details.
The unit of measurement
will flash on the LCD to
indicate the meter is in
measurement mode. When
the reading is stable, the unit
will stop flashing.
8351
4.
5.
6.
7.
8.
9.
5
“ "
Press to freeze
current readings. The text
"Hold" will appear on the
LCD. P ress " " again to
release.
8351
In 8361 measurement mode, press
" " to switch to conductivity or TDS
mode. The units for conductivity are
uS or mS. The units for TDS are ppm
or ppt.
Cond.
TDS
6
In TDS measurement mode, you can
press " " more than 2 seconds to
select manual ranging. (See details in
page11)
10.
TDS Measurement:
Set the TDS conversion factor to right
value. The factory default is 0.50.
To change the TDS factors, refer
Appendix B in page 24.
11.
Salinity Measurement: 12.
8371
is designed for salt measurement.
When in SALT mode, Built-in NaCL
conductivity to TDS conversion factor,
Temp. Coefficient and Normalization
Temperature are all fixed.
You may follow up steps 3-10 to
proceed the salt measurement.
See page 12
for the detail