WA301
Table of contents
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WA301
Wideband Amplifier
INSTRUCTION MANUAL
1
Table of Contents
Specification 2
Safety 4
EMC 5
Installation 6
Operation 7
Maintenance 7
Instructions en Francais
Sécurité 8
Installation 9
Fonctionnement 10
Entretien 10
Bedienungsanleitung auf Deutsch
Sicherheit 11
Installation 12
Bedienung 13
Wartung 13
Istruzioni in Italiano
Sicurezza 14
Installazione 15
Funzionamento 16
Manutenzione 16
Instrucciones en Español
Seguridad 17
Instalacion 18
Functionamiento 19
Mantenimiento 19
2
Specification
(Specifications apply for 15V pk-pk into 50Ω at x10 gain)
Bandwidth: -3dB at 1MHz
Flatness: -1dB at 400kHz
Rise/Fall time: <0.5µs
Distortion: <0.1% at 1kHz
Input Impedance:
10kΩ
Max. Allowable Input Voltage ± 10V
Gain: Vernier adjustment between x1 and x10.
Output Impedance:
50Ω and 600Ω
Output 0dB:
30V peak to peak from 50Ω (15V into 50Ω)
Output -20dB:
3V peak to peak from 50Ω (1.5V into 50Ω)
Output DC Offset: <5mV
Power: 220V-240V AC or 110V-120V AC ±10%, 50/60Hz,
adjustable internally; 20VA max. Installation Category II.
Operating range: +5ºC to +40ºC, 20% to 80% RH.
Storage range: -40ºC to 70ºC.
Environmental: Indoor use at altitudes up to 2000m, Pollution Degree 2
Safety: Complies with EN61010-1.
EMC: Complies with EN61326.
Size: 210(W) x 75(H) x 230(D) m m, incl. feet.
Weight: 1.1 kg.
3
EC Declaration of Conf ormity
We Thurlby Thandar Instruments Ltd
Glebe Road
Huntingdon
Cambridgeshire PE29 7DR
England
declare that the
WA 301 Wideband Amplifier
meets the intent of the EMC Directive 2004/108/EC and the Low Voltage Directive 2006/95/EC.
Compliance was demonstrated by conformance to the following specifications which have been
listed in the Official Journal of the European Comm unit ies.
EMC
Emissions:
a) EN61326-1 (2006) Radiated, Class B
b) EN61326-1 (2006) Conducted, Class B
c) EN61326-1 (2006) Harmonics, referr ing to EN61000-3-2 (2006)
Immunity: EN61326-1 (2006) Immunity Table 1, refer ring to:
a) EN61000-4-2 (2006) Electrostatic Discharge
b) EN61000-4-3 (2006) Electromagnetic Field
c) EN61000-4-11 (2004) Voltage Interrupt
d) EN61000-4-4 (2004) Fast Transient
e) EN61000-4-5 (2006) Surge
f) EN61000-4-6 (2009) Conducted RF
Performance levels achieved are detailed in the user manual.
Safety
EN61010-1 Installation Category II, Pollution Degree 2.
CHRIS W ILDING
TECHNICAL DIRECTOR
2 January 2013
4
Safety
This instrument is Safety Class I accor ding to IEC classification and has been designed to meet the
requirements of EN61010-1 (Saf ety Requirements for Electrical Equipment for Measurement,
Control and Laboratory Use). It is an Installation Category II instrument intended for oper at ion from
a normal single phase supply.
This instrument has been tested in accordanc e with EN61010-1 and has been supplied in a safe
condition. This instruction manual contains some informat ion and warnings which have to be
followed by the user to ensure safe operation and to r etain the inst r um ent in a safe condition.
This instrument has been designed f or indoor use in a Pollution Degree 2 environment in the
temperature range 5°C to 40°C, 20% - 80% RH (non-condensing). I t may occasionally be subjected
to temperatures between +5° and -10°C without degr adation of its safety. Use of this instrument in a
manner not specified by these instructions may impair the safety protection provided. Do not
operate the instrument outside its rated supply voltages or environmental range.
WARNING! THIS INSTRUMENT MUST BE EARTHED
Any interruption of the mains earth conduct or inside or outside t he inst r um ent will make the
instrument dangerous. Int entional interruption is prohibited. The protective action must not be
negated by the use of an extension cord without a protective conductor.
When the instrument is connected to its supply, terminals may be live and opening the covers or
removal of parts (except those to which access can be gained by hand) is likely to expose live parts.
The apparatus shall be disconnected from all voltage sources before it is opened for any
adjustment, replacement, m aint enance or repair. Any adjustment, maintenance and repair of the
opened instrument under voltage shall be avoided as far as possible and, if inevitable, shall be
carried out only by a skilled person who is aware of the hazard involved.
If the instrument is clearly def ec t ive, has been subject to mechanical damage, excessive moisture
or chemical corrosion the safety protec t ion m ay be impaired and the apparatus should be
withdrawn from use and returned for checking and repair. Make sure that only fuses with the
required rated current and of the specified type are used for repl ac em ent . The use of makeshift
fuses and the short-circuiting of fuse holders is prohibited.
Do not wet the instrument when cleaning it. The following symbols are used on the instrument and
in this manual:-
Caution - refer to the accompanying documentation,
incorrect operation may damage the instr um ent.
alternating current.
terminal connected to chassis (ground) .
5
EMC
This instrument has been designed to meet the requirements of the EMC Directive 2004/108/EC.
Compliance was demonstrated by meeting the test limits of t he following standards:
Emissions
EN61326-1 (2006) EMC product standard for Electrical Equipment for Measurement, Control and
Laboratory Use. Test limits used were:
a) Radiated: Class B
b) Conducted: Class B
c) Harm onics: EN61000-3-2 (2006) Class A; the instrument is Class A by product category.
Immunity
EN61326-1 (2006) EMC product standard for Electrical Equipment for Measurement, Control and
Laboratory Use.
Test methods, limits and per formance achieved are shown below (requirement shown in brackets):
a) EN61000-4-2 (2006) Electrostatic Discharge : 4k V air, 4kV contact, Perfor mance B (B).
b) EN61000-4-3 (2006) Electromagnetic Field:
3V/m, 80% AM at 1kHz, 80MHz – 1GHz: Performance A ( A) and 1.4GHz to 2GHz:
Performance A (A) ; 1V/ m , 2.0GHz to 2.7GHz: Performance A (A).
c) EN61000-4-11 (2004) Voltage Interrupt: ½ cycle and 1 cycle, 0%: Performance A (B); 25
cycles, 70% and 250 cycles, 0%: Performance B (C).
d) EN61000-4-4 (2004) Fast Transient, 1kV peak (AC line), 0·5kV peak ( DC Outputs),
Performance B (B).
e) EN61000-4-5 (2006) Surge, 0·5kV (line t o line), 1kV (line to ground), Perfor mance A (B).
f) EN61000-4-6 (2009) Conducted RF, 3V, 80% AM at 1kHz (AC line only; DC Output
connections <3m, therefor e not tested), Performance A (A).
According to EN61326-1 the definitions of performance criteria are:
Performance criterion A: ‘During test normal performance within the specif icat ion limits.’
Performance criterion B: ‘During t est , temporary degradation, or loss of function or performance
which is self-recovering’.
Performance criterion C: ‘During t est, temporary degradation, or loss of function or perfor m anc e
which requires operator intervention or system reset oc cur s . ’
Cautions
To ensure continued compliance with the EMC directive observe the following precautions:
a) after opening the case for any reason ensur e that all signal and ground connections are
remade correctly and that case screws are correc t ly refitted and tightened.
b) in the event of part replacement becoming neces s ar y, only use components of an identical
type, see the Service Manual.
6
Installation
Mains Operating Voltage
The operating voltage of the instr um ent is shown on the rear panel. Should it be necessary to
change the operating voltage from 230V t o 115V or vice-versa, proceed as follows:
1. Disconnect t he inst rument from all voltage sources.
2. Remove the 4 screws which hold the upper and lower case halves together and lift off the
case upper.
3. Remove the 4 screws which hold the power supply printed circuit board to the case lower.
4. Chang e t he appropriate zero-ohm links in the pcb:
Link LK1 only for 230V operation.
Link LK2 and LK3 only for 115V operation.
5. Refit the pcb to the case lower, ensuring all connections (especially safety earth) are
remade as before, and refit the case upper.
6. To comply with safety standard requirements the oper at ing voltage marked on the rear panel
must be changed to clearly show the new voltage setting.
Mains Lead
When a three c or e m ains lead with bare ends is provided it should be connect ed as follows:
Brown - Mains live
Blue - Mains Neutral
Green/Yellow - Earth
WARNING! THIS INSTRUMENT MUST BE EARTHED
Any interruption of the mains earth conduct or inside or outside t he inst r um ent will make the
instrument dangerous. Int entional interruption is prohibited.
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