Thermo Electron 3940 Series, Руководство по эксплуатации и техническому обслуживанию

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2
R70-32 (WEB)
REV(12-04) D
RECORDER CASE LOCATION
Upon unpacking, find a suitable location to mount the
unit before plugging it in. After the recorder has been
connected to the main AC power supply, connect the
battery to the battery strap and place the battery in its
holder (if your unit is equipped with an optional
battery back-up).
Select a location that is well lighted, free from dust,
dirt and corrosive fumes. The instrument should not be
located near any sources of heat or be subjected to
sudden or extreme temperature changes. It should be
mounted on a rigid support that is not subject to
vibration. Refer to Figures 7 and 8 for recorder case
dimensions.
POWER SUPPLY
The recorder uses AC power when the unit is
operating normally. If the AC power were to fail and
the battery back-up option is installed, then the green
LED light will begin "flashing" to indicate that there is
an interruption in the main power. Otherwise, the
green LED light glows continuously.
The recorder will have either an AC power cord or a
wall mounted transformer for connection to the main
AC power supply. If a permanent connection to the
main AC power supply is to be accomplished in the
field, then refer to Figures 6A, 6B, 6C and 6D for
diagrams showing the connection to a 115VAC 50-
60Hz or a 230VAC 50-60Hz main power supply.
CONNECTING A PROBE
Most of the temperature recording units will already
have a temperature indicating probe installed. If the
recorder has a Temperature/Humidity type probe,
make sure to remove the protective cap when the
recorder is in use and replace the cap whenever the
environmental chamber is to be rinsed.
If you will be supplying your own probe input device,
then this next section will contain some important
information concerning the connection of the probe to
the recorder.
This recording unit is capable of accepting input from
either a CURRENT source (such as 4-20mA), a
VOLTAGE source (such as 0-1 Volt, 0-5 Volts, 1-5
Volts or 0-10 Volts) or a 100 ohm RTD probe.
Note:
The recorder is programmed (at the factory) to accept
a specific probe input range. Connecting a probe that
supplies the recorder with a current or voltage that is
not within the specified range will give unpredictable
results and may damage the recorder. If you are not
sure of the probe type or input range for your
recorder, please contact C
O
B
EX
Recorders before
continuing.
In order to connect the probe input device to the
recorder, you must first gain access to the main
microprocessor PC board that is mounted to the back
of the chart plate.
CAUTION! DO NOT TOUCH the
terminals of the transformer while the unit
is connected to the main AC power
supply. To avoid the risk of possible electric shock,
unplug or disconnect the recording unit from the main
power supply before attempting to open the recorder.
If the recorder is installed with the battery back-up
option, disconnect the 9 Volt battery to avoid
damaging the recorder and draining the battery.
On 6" inch recording units mounted in a metal
enclosure, the chart plate on the recorder case is held
by four (4) screws. Unscrew and gently remove the
chart plate to expose the main microprocessor PC
board of the recording unit. Otherwise, your recording
unit will have a hinged chart plate held in place by two
(2) screws located in the upper and lower right hand
corners of the chart plate. Remove these two screws
and open the hinged chart plate. On 8" enclosures,
there is a single screw along the right hand edge that
secures the chart plate inside of the enclosure. Loosen
this screw and open the hinged chart plate.
If you are not sure how to access the back of the chart
plate, please contact C
O
B
EX
Recorders before
continuing.