Wayne Kerr AP10030, Руководство пользователя и обслуживания

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Wayne Kerr AP 1kW Power Supplies • Issue 2 7
3. INTRODUCTION
Autoranging - The AP series of autoranging bench\rack power supplies utilise
switching techniques to provide d.c. power up to 1kW over a wide range of voltage and
current combinations, thus obviating the need to select alternative output power supplies.
Precision - The units include full digital metering of both voltage and current. The
output of each power supply is adjustable from near zero to maximum volts and from
near zero to maximum amps by the 10 turn front panel controls. Alternatively, the
outputs can be controlled by the remote resistive or voltage programming facilities at the
rear of the unit, or, when fitted, by the IEEE488 interface.
Enable & Preview - The power supply output is enabled by the front panel ‘output
enable’ switch. When this switch is in the ‘button out’ position the front panel LED
meters and bargraphs display preview the output voltage and output current. This is done
without having to open circuit the load to set the voltage or short circuit the output to set
the current.
Displays - When in the ‘output enabled’ state, the meters and bargraphs display the
actual voltage and current being delivered to the load. The bargraph displays, in addition
to providing ‘trend’ indication, also allow the user to see at a glance, the current or
voltage availability.
Overvoltage Limit - To protect the load from the inadvertent application of an excessive
voltage, the power supply incorporates an ‘Overvoltage Limit’ (OVL). this causes the
supply to ‘down programme’ if the pre-set level has been exceeded. It can be adjusted by
rotating the ‘adjust OVL’ control through the front panel. In the local mode, this voltage
level can be monitored on the voltmeter by depressing the ‘Display OVL’ button.
Indicators - To enable the user to quickly assess the operating states, the power supply is
provided with LED indication of ‘output enabled’ and ‘CV’ or ‘CI’ operation. LED
indication is also provided of, an overtemperature condition (when any of the three heat-
sink assemblies have exceeded a safe operating temperature), an overvoltage condition
and of unregulated output (if the load demand exceeds 1kW d.c.).
Computer Control - An IEEE488 interface is available as a factory fitted option. When
fitted, this allows control of voltage and current and, in addition, provides ‘read back’ to
the controller of the actual voltage and current being delivered to the load. The IEEE488
option includes LEDs which indicate if the power supply is ‘talking’ or ‘listening’ or
whether a ‘service request’ signal has been sent.
System or Bench Use - The power supply can be used on the bench or rack mounted
using the brackets provided. All units are fan cooled.
Standards - The AP series is designed to meet generic emc standards. From 1st Jan 1997
this product will comply with Euro Norm safety standard EN61010-1.