ALTER SM1150, Техническая заметка

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page 4 of 29
File: SM1150_r5eng - February 2007 - Technical note: SM1150
SM 1150
File: SM1150_r5eng - February 2007 - Technical note: SM 1150
page 5 of 29
SM 1150
Handling Warnings
The SM1150x has two handles on the front panel to help
unpacking and handling operations: never use only the
handles to lift the equipment but support the weight with
an appropriate base on bottom!
The handles do not withstand the off-center weight of the
equipment (17.3 kg=38 lbs).
General Description
The SM1150x is able to supply the power required by a
magnetron type NL10230 or equivalent, with nominal power
of approx. 3,000 W @ 2.45 GHz.
The power output can be adjusted continuously, from 10 up to
100%, using an external analog signal or by means of the
panel controls.
The unit, in addition to power the magnetron, has several
features and commands to control and power the magnetron’s
accessories.
The power supply is built in a self-ventilated 19” wide rack, 3
HE high, with a front panel comprising (see drw):
- a main switch [1];
- LED status lamps [2];
- a 4 digits display showing a working parameter, i.e. the
output power, or the alarms codes, also performing the funtion
of parameters viewing and setting, as well as status mode
displaying [3];
- 3 push-buttons for parameters settings having the meaning of
“scroll down”, “escape”, “enter” [4];
- a rotating knob to adjust the chosen value [5];
- pull off handles.
The power supply is designed to guarantee stable, correct and
safe operation, and offers the following special features:
a) it has a powerful CPU which controls the parameters and
the working mode; the CPU has also 2 serial communication
ports, one RS 232 to allow the upgrade of the software, the
second for future implementation of a field-bus.
b) it is equipped with a circuit capable of detecting the
overvoltage on the magnetron (“moding”, detecting operation
at frequencies other than the normal operating frequency or
damage or end of the magnetron life). The circuit also ensures
that the power supply is switched off if the high voltage cable
is disconnected, or if the heating filament fails.
c) it has a circuit capable of detecting an earth current on the
anode circuit, super imposing the normal current circulating in
the magnetron (which returns to earth). This feature allows to
cut out the output in less than 1 ms.
The SM1150x has been developed to power and monitor our
remotable microwave head type TM030.
The SM1150x unit may be used also to power microwave
generators (heads) developed by others manufacturers under
condition that they are electrically compatible.See the electri-
cal specifications of the unit on the next pages.
The SM1150D has been designed for US main line 3x208V,
while the SM1150T is for European system 3x400V: both
models accept wide line fluctuations.
The reduced height of the rack (only 3 HE, corresponding to
133 mm) allows to use small cabinet, even in big plant: i.e.
in a standard cabinet with an height of 2 meters, arranged to
receive 19” racks, up to 12 SM1150x units may be easily
installed.
The user must provide a proper cooling flow: the cooling air
enter into the unit from the right side, it passes through the
internal circuits and components, then it goes out from the
back. The intake air flow is approx. 120 mc/h.
MAIN SWITCH
I
o
MICROWAVE ON
ALARM
Enter
SWITCHING POWER GENERATOR SM 1150
INTERLOCK OK
POWER ON
READY
Esc
ADJUST
REGGIO EMILIA - ITALY
al ter
1 2 3 4 5
FRONT PANEL