UNISENSE N2O-50, Руководство пользователя

Страница: 10 / 23

10
For directions on adjusting the polarization, please consult the
relevant instrument manual.
P
RE
-
ACTIVATION PROCEDURE
1. Secure the nitrous oxide sensor with its tip immersed
in nitrous oxide free water. (It does not harm the sensor
to be in air instead, but pre-activation, polarization, and
calibration might as well be made with the same set-up).
2. Using an fx-6, fx-3 pA, x-5 or N
2
O UniAmp:
Change the polarization to -1.3 V in the Calibration tab of
SensorTrace Suite.
Using a Microsensor Multimeter or Monometer:
Connect the sensor to the amplifier.
Turn the polarization to -1.3V.
Using a PA2000 amplifier:
Connect ONLY the BNC connector of the adaptor cable,
not the yellow banana plug and turn the polarization
voltage to -1.3 V.
Leave the polarization at -1.3 V for approx 30 min. You will see a
very high signal in the beginning but this will decrease after 5 - 10
minutes.
P
OLARIZATION PROCEDURE
1.
Using a fx-6, fx-3 pA, x-5, or N
2
O UniAmp
Change the polarization back to -0.8 V.
Using a Microsensor Multimeter or Monometer:
Turn the polarization voltage to -0.8 V.
Using a PA2000 amplifier:
Turn the polarization voltage to -0.8 V.
Connect the yellow banana plug to the yellow connection on
the meter.
2. You will see a sharp decrease followed by a rapid increase in
NOTE
The software
converts the
pA signal into
mV. Standard
setting is 1 mV =
1 pA. This may
be modified
by changing
the Pre-Amp
setting (mV/pA)
in the software
(UniAmp) or on
the instrument
(Multimeter,
Monometer, and
Field Multimeter).