WPI APOLLO 4000, Инструкция по эксплуатации

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APOLLO 4000
OPERATING INSTRUCTIONS
WORLD PRECISION INSTRUMENTS B-2
Fig. B1 – When
attaching a
temperature probe
or sensor to the
APOLLO4000,
align the red dot of
the instrument with
the red dot on the
cable connector.
associated electronics. To turn the unit off, it is therefore only necessary to press
the Power button once. It is recommended, however, to close the application
programs before pressing the Power button. In some cases when the embedded
computer is not responding it may be necessary to press and hold the Power
button in for 3 seconds before the unit will turn off (see troubleshooting section).
The alternative method for switching the unit off is to position the mouse cusor on
START, click on hold down once, and then choose SHUT DOWN from the pop-up
menu. This method will be familiar to Windows ® users.
Precautions for handling sensors
The range of free radical sensors offered by WPI vary in their fragility. However, at
all times the user must exercise caution to avoid damaging the delicate
polymeric membrane covering the end of each sensor.
This membrane
prevents water and dissolved species such as ions and macromolecules from
reaching the electrode surface where they would interfere with normal
measurement and poison the electrode surface. When the sensor membrane
becomes damaged, sample contents are free to react at the electrode surface.
This causes the background current to become very large and/or go off scale
(negative or positive depending on the reacting species). The membrane integrity
of the sensor can always be checked by ascertaining that the current remains low
and stable when the sensor tip is immersed in a 1.0 M saline solution.
Attaching a sensor to the APOLLO 4000
Each channel on the APOLLO 4000 is equipped with two high quality sensor input
receptacles. The channel marked “Temp” is for use only with a compatible WPI
temperature electrode ( e.g., ISO-TEMP-2 ). The channel marked “Sensor” is for use
only with one of WPI’s free radical sensors.