Thurlby Thandar Instruments CPX200 User Manual [en, de, fr, it]
CPX200
Dual 35V 10A Power Flex Power Supply
INSTRUCTION MANUAL
Table of Contents
Specification 2
Safety 4
EMC 6
Installation 7
Connections 8
Operation 9
Maintenance 11
Instructions en Francais
Sécurité 12
Installation 13
Connexions 14
Opération 15
Maintenance 17
Bedienungsanleitung auf Deutsch
Sicherheit 18
Installation 19
Anschlüsse 20
Betrieb 21
Wartung 24
Istruzioni in Italiano
Sicurezza 25
Installazione 26
Collegamento 27
Funzionamento 28
Manutenzione 30
Instrucciones en Español
Seguridad 31
Instalación 32
Conexiones 33
Funcionamiento 34
Mantenimiento 36
1
Voltage Range:
0V to 35V
Current Range:
0A to 10A
Power Range:
Up to 175W
Output Voltage Setting:
By coarse and fine controls.
Output Current Setting:
By single logarithmic control.
unregulated.
Output Switch:
Electronic. Preset voltage and current displayed when off.
Output T erminals:
Universal 4mm safety binding posts on 19mm (0·75”) pit c h.
remote connection.
Reverse protection by diode clamp for reverse currents up to 3A.
adjustment.
Line Regulation:
<0.01% of maximum output for a 10% line change.
Load Regulation:
<0.05% of maximum output for a 90% load change, using remote sens e.
(20MHz bandwidth):
loaded (7A @ 25V), constant voltage mode.
Transient Load Response:
<2ms to within 100mV of set level for a 5% to 95% load change.
Temperatur e Coefficient:
Typically <100ppm/°C
Trip message on display.
OUTPUT SPECIFICATIONS
Operating Mode: Constant voltage or constant current with automatic cross-over
Specification
provided that the power demanded stays within the power
envelope, see graph. Outside of this envelope the output becom es
Sensing: Switchable between local and remote. Spring-loaded push terminals for
Output Protection: Forward protection by Over-Voltage Protection (OVP) trip; maximum
voltage that should be applied to the terminals is 50V.
OVP Range: 10% to 110% of maximum output voltage set by fr ont panel screwdriver
Ripple & Noise
Status Indication: Output on lamp.
5mVrms max; typically <2mVrms, <20mV pk-pk, both outputs fully
Constant voltage mode lamp.
Constant current mode lamp.
Unregulated (power limit) lamp
2
Meter Types:
Dual 4 digit meters with 12.5mm (0.5") LEDs. Reading rate 4 Hz.
Meter Resolutions:
10mV, 10m A
Current 0.5% of reading ± 1 digit
Installation Category II.
Power Consumption:
600VA max.
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.
(optional rack mounting k it available).
METER SPECIFICATIONS
Meter Accuracies: Voltage 0.2% of reading ± 1 digit,
GENERAL
AC Input: 115V AC or 230V AC ± 10%, 50/60Hz.
Size: 210 x 130 x 375mm (WxHxD) half rack width x 3U height
Weight: 5kg
3
l
Safety
This power supply is a Safety Class I instrument according to IEC classification and has been
designed to meet the requirem ents of EN61010-1 (Safety Requirements for Electrical Equipment
for Measurement, Control and Laborator y Use). It is an Installation Category II instrument
intended for operation 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 information 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). It may occasionally be
subjected to temperatures between +5°C and –10°C without degradation of its safety. Do not
operate while condensation is present.
Use of this instrument in a manner not spec ified by these instructions may impair the safety
protection provided. Do not operate the instrum ent outside its rat ed 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. Capacitors inside the power supply may still be
charged even if the power supply has been disconnected from all voltage sources but will be
safely discharged about 10 minutes after s witching off power.
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 protection may 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
replacement. The use of makeshif t 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 m anual:-
Earth (ground) terminal.
mains supply OFF.
mains supply ON.
alternating current (ac)
4
Performance levels achieved are detailed in the user manual.
We Thurlby Thandar Instruments Ltd
Glebe Road
Huntingdon
Cambridgeshire PE29 7DR
England
declare that the
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.
EC Declaration of Conf ormity
CPX200 35V 10A Bench Power Supply
EMC
Emissions: a) EN61326-1 (2006) Radiated, Class B
b) EN61326-1 (2006) Conducted, Class B
c) EN61326-1 (2006) Harmonics, referring t o EN61000-3-2 (2006)
Immunity: EN61326-1 (2006) Immunity Table 1, referring to:
a) EN61000-4-2 (2009) 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
Safety
EN61010-1 Installation Category II, Pollution Degree 2.
CHRIS W ILDING
TECHNICAL DIRECTOR
2 January 2013
5
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 met hods, limits and performance achieved are shown below (requirement shown in
brackets):
a) EN61000-4-2 (2009) Electrostatic Discharge : 4k V air, 4kV contact, Perfor mance A (B).
EMC
b) EN61000-4-3 (2006) Electromagnetic Field:
3V/m, 80% AM at 1kHz, 80MHz – 1GHz: Performance A
1.4GHz to 2GHz: Performance A (A); 1V/m, 2.0GHz to 2.7G Hz: Performance A (A).
c) EN61000-4-11 (2004) Voltage Interrupt:
½-cycle, 0%: Peformance A (B); 1 cycle, 0%: Performance A (B);
25 cycles, 70%: Performance B (C); 250 cycles, 0% : Per formance B (C).
d) EN61000-4-4 (2004) Fast Transient, 1kV peak (AC line), 0·5kV peak ( DC Out puts) ,
Performance A (B).
e) EN61000-4-5 (2006) Surge, 0·5kV ( line to line), 1kV (line to ground), Perf or m ance 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
performance which requires operator int er vention or s ystem r eset occurs.’
Where Performance B is stated it is because DC Output reg ulation, or V & I m eas ur em ent
accuracy, may deviate beyond Specification limits under the test conditions. However, the
possible deviations are still small and unlikely to be a problem in practice.
(A) and
Note that if operation in a high RF f ield is unavoidable it is good pract ice t o c onnect the PSU to
the target system using screened leads which have been passed (together) through an absorbing
ferrite sleeve fitted close to the PSU terminals.
Cautions
To ensure continued com pliance with the EMC directive observe the following precautions:
a) aft er opening the case for any reason ensure that all signal and ground connections are
b) In t he event of part replacement becoming necessary, only use components of an identical
6
remade correctly and that case screws are correc t ly refitted and tightened.
type, see the Service Manual.
BROWN RED
(VIEW FR OM ABO VE) (VIEW FR OM ABO VE)
230V OPERATION 115V OPERATION
BLUE BLUE
RED BROWN
L L
N N
P P
(PARK) (PARK)
Mains Operating Voltage
Check that the instrument oper ating voltage marked on the rear panel is suitable for the local
supply. Should it be neces sar y to change the operating voltage, proceed as follows:
1. Ensure that the instrument is disconnect ed from the AC supply.
2. Remove the 6 screws holding the case upper and lift off the cover.
3. Change the plug-in connections between the transformer and main board following the
diagram below:
Installation
4. Re-assemble in the reverse order.
5. To comply with safety standard requirements the operating voltage on the rear panel must
Mains Lead
When a three c or e m ains lead with bare ends is provided this should be connect ed as follows:
When f it t ing a fused plug a 5 amp fuse should be fitted inside the plug. As the colours of the
wires in the mains lead of this apparatus may not correspond with the coloured markings
identifying the terminals in your plug proceed as follows:
The wire which is coloured green-and-yellow must be connected to the terminal in the plug which
is marked by the letter E or by the safety earth symbol shown above or coloured green or greenand-yellow.
The wire which is coloured blue must be connected to the terminal which is marked with the lett er
N or coloured black.
The wire which is coloured brown must be connected to the terminal which is marked with the
letter L or coloured red.
be changed to clearly show the new voltage setting.
BROWN - MAINS LIVE
BLUE - MAINS NEUTRAL
GREEN/YELLOW - EARTH Safet y Earth Symbol
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.
Mounting
7
This instrument is suitable both for bench use and rack mounting. It is delivered with feet for
bench mounting. The front feet include a tilt mechanism for optimal panel angle.
A rack kit for mounting one or two of these Half -width 3U high units in a 19” rack is available from
the Manufacturers or their overseas agents.
Connections
All connections are made from t he front panel.
The load should be connected to the positive (red) and negat ive (black ) terminals marked
OUTPUT. The OUT PUT terminals ar e r at ed at 30A.
Remote sense connections to the load, if r equired, are made from the posit ive (+ ) and
negative (−) SENSE terminals. Switch the LOCAL/REMOTE switch to REMOTE when remote
sensing is required. Switch back to LOCAL when remote sensing is not in use.
The terminal marked
is connected to the chassis and safety eart h ground.
8
The operation of both outputs is identical; the following description applies to both.
Setting Up the Output
With the PO WER switch on (l) and the OUTPUT switch off the output voltage and current limit
can be accurately preset using the VOLTAGE and CURRENT controls; the upper met er shows
the set voltage and the lower meter shows the set maximum current.
When the O UT PUT switch is switched on, the OUTPUT ON lamp and the CV (constant voltage)
lamp light; the upper meter cont inues t o s how the set voltage but the lower meter now shows the
actual load current.
Constant Voltage
The output voltage is adjusted using the coar se and fine VOLTAGE control; the CURRENT
control sets the maximum current that c an be supplied.
The CV lamp lights to show constant voltage mode.
Constant Current
If the load resistance is low enough such that, at t he output voltage set, a current great er t han
the current limit setting would flow, the power supply will automatically move into constant current
operation. The current output is adjusted by the CURRENT control and the VOLTAGE contr ols
set the maximum voltage that can be generated.
Operation
The CI lamp lights to show constant current mode.
Instantaneous Current Output
The current limit control can be set t o limit the continuous output current to levels down to 10mA.
However, in common with all precision bench power supplies, a capacitor is connected across
the output to maintain stability and good transient response. This capacitor charges to the output
voltage and short-circuiting of the output will produce a current pulse as the capacitor discharges
which is independent of the current limit setting .
Power Limit
The maximum output at different voltage settings is limited by the power envelope illustrated
below:
The power envelope is set to give 35V/5A and 12V/10A under all supply conditions (both outputs
loaded); at lower output voltages the output power is restricted by the 10A current maximum.
When the power limit is exceeded, the stat us indicat ion will change from CV or CI to UNREG. For
example, if the supply is set to 14V, with the current limit at maximum, and is connect ed to a
3.5Ohm load, 4Amps will flow and the supply will be in CV mode. As t he voltage acr oss t he load
is increased, the power into the load increases until, at about 25V, the power limit is exceeded
and the supply changes from CV to UNREG.
9
Connection to the Load
The load should be connected to the positive (red) and negat ive (black ) OUTPUT terminals. Both
are fully floating and either can be connected to ground.
Remote Sensing
The unit has a very low output impedance, but this is inevitably increased by the resistance of the
connecting leads. At high currents this can result in significant differences bet ween the indicated
source voltage and the actual load voltage (two 20mΩ connecting leads will drop 0.2V at 5 Amps,
for instance). This problem can be minimised by using short, thick, connecting leads, but where
necessary it can be completely overcome by using the remote sense f acility.
This requires the sense term inals to be c onnected to the output at the load instead of at the
source; insert wires into the spring-loaded SENSE terminals and connect directly to the load.
Switch the LOCAL/REMOTE switch to REMOTE. To avoid instability and transient response
problems, care must be taken to ensur e good coupling between each output and sense lead.
This can be done either by twisting the leads together or by using coaxially screened cable
(sense through the inner). An electrolytic capacitor directly across the load connection point may
also be beneficial.
The voltage drop in each output lead must not exceed 0.5 Volts.
Switch the LOCAL/REMOTE switch back to LOCAL when remote sensing is not in use.
Series or Parallel connection with other units
The outputs of the power supply are fully floating and may be used in series with other power
supply units to generate high DC voltages up to 300V DC.
WARNING! Such voltages are exceedingly hazardous and great care should be taken to shield
the output terminals for s uch use. On no account should the output terminals be t ouched when
the unit is switched on under such use. All connections to the terminals must be made with the
power switched off on all units.
It should be noted that the unit can only source current and cannot sink it, thus units cannot be
series connected in anti-phase.
The unit can be connected in parallel with others to produce higher currents. Where several units
are connected in parallel, the output voltage will be equal to that of the unit with the hig hest
output voltage setting until the current dr awn exceeds its current limit s et ting, upon which the
output will fall to that of the next highest setting, and so on. In constant current m ode, units can
be connected in parallel to provide a current equal to the sum of t he c ur r ent limit settings.
Note that the output terminals are rated at 30A maximum; if two or more outputs are operated in
parallel to source higher currents than this the junction should be made at a separate point, not
one of the terminals.
Protection
Overvoltage protection (OVP) is fully variable within the range 10% to 110% of the supply's
maximum output level. The OVP limit is set via the screwdriver adjustable SET OVP preset
potentiometer, accessible through a hole in the front panel. Rotating the preset clockwise
increases the limit, which can be read directly on the user display by pressing the button beneath
the preset. If the voltage on t he out put exceeds the set OVP for any reason, including an
externally forced voltage, the output will be tripped off.
10
The output will also be tripped off if an attempt is made to draw power from the sense wires.
When the out put is t r ipped t he OUTPUT lamp will still be ON but the displays will show ‘OP trip’
and the UNREG lamp will also light. Turn the output off; the trip message should be replaced with
the normal preset V and I readings. When the cause of the trip has been removed the output can
be switched on again.
Even with the output off the load is still connected to the power supply output stage. Do not apply
external voltages in excess of 50V to the power supply terminals or damage may result.
The output is protected f r om reverse voltages by a diode; the continuous reverse current must
not exceed 3 Amps, although transients can be much higher.
Ventilation
The power supply is very efficient but nevertheless can generate significant heat at full power.
The supply relies on convection cooling only and it is therefore important that ventilation is never
restricted if perf or mance and safety are to be maintained. If t he s upply is mounted in a res t r ict ed
space, eg. a 19 inch rack, then adeq uat e ventilation m ust be ensured by using, for example, a
fan tray.
The Manufacturers or their ag ents overseas will provide repair for any unit developing a fault.
Where owner wish to undertake t heir own maintenance work , this should only be done by skilled
personnel in conjunction with the service manual which may be purchased directly from the
Manufacturers or their agents overseas.
Fuse
Maintenance
The correct fuse type for both AC supply ranges is:
Make sure that only fuses of the required rated current and specified type are used for
replacement. The use of makeshift fuses and the short-circuiting of fuse-holders is prohibited.
To replace the fuse, first disconnect t he inst rument from the AC supply. Remove the 6 cover
securing screws and lift off the cover. Replace the fuse with one of the correct t ype and refit the
cover.
Note that the main function of the fuse is to make the inst r um ent safe and limit damage in the
event of failure of one of the switching devices. If a fuse f ails it is therefore very likely that the
replacement will also blow, because the supply has developed a fault; in such circumstances the
instrument will need to be returned to the manuf ac t ur er for service.
Cleaning
If the PSU requires cleaning use a clot h t hat is only lightly dampened with water or a mild
detergent. Polish the display window with a soft dry cloth.
WARNING! TO AVOID ELECTRIC SHOCK, OR DAMAGE TO THE PSU, NEVER ALLOW
WATER TO GET INSIDE THE CASE. TO AVOID DAMAGE TO THE CASE OR DISPLAY
WINDOW NEVER CLEAN WITH SOLVENTS.
10 Amp 250V HBC time-lag, 5 x 20mm.
11
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