LPA400 User Guide
LPA400 series
High frequency, high voltage, dc accurate, power
amplifier for laboratory and industrial applications.
Description
LPA400 is a high frequency amplifier with up to ±400V peak voltage
output capability from dc to greater than 100 kHz. At lower output levels,
the gain extends beyond 1MHz. It uses an integrated power driver with
regulated high voltage supplies to give dc accuracy and excellent high
frequency performance, with high reliability.
The gain is switch selectable as x50, x200, or x500 and uses 0.1% low
temperature coefficient resistors for accuracy and thermal stability.
LPA400 is unconditionally stable driving resistive, capacitive (See note)
or inductive loads and can deliver up to 100mA rms continuously into any
load. An indicator on the front panel indicates that the output is on and
there is a switch to reset the protection circuitry in the event that it has
been triggered by excessive output current.
As well as ac and ac+dc coupling there is a special coupling mode, ac+
(dc), where the dc component is not eliminated entirely but is reduced by
a factor of about 10. This is particularly useful for testing wound
components with a controlled dc bias current where the dc resistance of
the component is considerably lower than the ac resistance. The high
frequency bandwidth can also be reduced with a low pass filter.
The LPA400 is housed in a robust steel cabinet and includes a current
overload reset switch.
LPA400 User Guide
Warranty
This product is guaranteed to be free from defects in materials and
workmanship for a period of 36 months from the date of purchase.
In the unlikely event of any problem within this guarantee period, first
contact Newtons4th Ltd. or your local representative, to give a description of
the problem. If the problem cannot be resolved directly then you will be
given an RMA number and asked to return the unit. The unit will be repaired
or replaced at the sole discretion of Newtons4th Ltd.
This guarantee is limited to the cost of the LPA400 itself and does not extend
to any consequential damage or losses whatsoever including, but not limited
to, any loss of earnings arising from a failure of the product.
In the event of any problem with the equipment outside of the guarantee
period, Newtons4th Ltd. offers a full repair service – contact your local
representative.
The LPA400 does not require any calibration.
Declaration of Conformity
We, Newtons4th Ltd, declare that the product LPA400, conforms to the
requirements of Council Directives:
89/336/EEC relating to electromagnetic compatibility:
EN 55022 Class A
73/23/EEC relating to safety of laboratory equipment:
EN 61010-1
January 2001
Eur Ing Allan Winsor BSc CEng MIEE
(Director of Newtons4th Ltd)
