Statron 3225.71 User guide

Operating instruction lab

power supply unit

type 3225.71

The intended application of the power supply unit covers:

- link and operation of low-vol tage consumers with an operating voltage between 2x(0 t o 30 V DC) and 1x (0 to
40VDC/0-3A . Fixed output 5VDC/5A The power input of the consumer may not exceed 4,0 A. Output 1 to 3 can
be connect paral lel or series.

Note! Absolutely read!

- Read this guidance exactly. With damage, whic h is caused by neglect of the guidance, the warranty clai m goes
out. For damages we do not take ov er adhesi on.

1. introduction

this power supply unit is univ er sal ly applic able with its i nfini tely variable adjustment possibilities of voltage and
current for school, occupation, hobby etc .. An elect r onic current limiting protec ts the power supply unit against
overloading. Output v oltage and - current ar e electronic ally stabilized and infinitely variable adjustable. Thus the

electronic restraint c ur r ent can as adjustable Current limiting to be used, in order to protect consumers against a t oo
high power input. In the case of an overloading the output voltage is then lowered accordingly (in the c ase of short­circuit on close 0V). With removal of the ov er load the output volt age adjusted before resets i tself automatically. T he
respective operating point - voltage - (u) - or restraint c ur r ent (i) - i s di splayed by one red LED each. T he adjusted
values are readable over 2 LCD displays each. The vol tage or current adjustment i s made by one wirewount
potenbtiometers ten turns.

2. Safety instructions

2.1 The power supply unit is in protection class I. The safety measures comply wit h DIN EN61010 and DI N E N

60950. The transformers comply with DIN EN 61558 and have passed the primary/secondary 3.75 kVeff
tests.

2.2 Check that th e protective g rounding conductor (yellow/green) is not disconnected either from the mains
cable or in the unit, since a disconnected protective conductor may lead to a risk of death. Also check
that the insulation is not damaged or destroyed.

2.3 Power supply units must be kept out of the reach of chil dren!

2.4 In commerci al establish ments, th e safety regulatio ns of the pro fessional trad e association f or electrical
appli ances and equipment must be observed.

2.5 In schools, educational establishments, hobby and independent workshops, there must be careful
supervision that power supply units are operated by trained personnel.

2.6 When opening covers or removing components, apart from when this can be done by hand, live parts
may be exposed . Connecti ons may also be live. Before ad justment, maintenance, repair or replacement of
components, the unit must be disconnected from any power source, if opening the unit is necessary.
Thereafter, if adjustment, maintenance or repair of the open unit when it is connected to the power
supply is unavoidable, this may only be carried out by a specialist engineer familiar with the associated
risks and relevant regulat ions.

2.7 The capacitors in the unit may still carry a charge, even when th e unit is discon nected from an y power
supply.

2.8 Check th at onl y fuses of t he type an d fuse cu rrent rati ng i ndicat ed are used as replacements. The use of
repaired fuses or bri dging of the fu se holder i s not permi tted. T he unit is protected against o verloadin g
and short-circuits. If the primary fuse melts, there is a serious fault which must be dealt with by a
specialist engineer. After successful repair, a new fu se link can th en be installed by an engineer.

2.9 Do not switch on the power supply unit if it has been moved from a cold to a warm place. In unfavo rabl e
conditions, the condensed water released on thawing can destroy your unit or cause life-threatening
voltages at the output terminals. Ensure that the unit can warm up to room temperature without any
adjacent mains current.

2.10 When working with power supply units, you are not permitted to wear any metallic or conductive jewelry
like chains, bracelets, or similar.

2.11 Power supply units are not permitted for use on human beings or animals.

2.12 Series con n ectio n o f the o ut pu ts of o ne o r more mai ns p ow er un it s causes l ife- threat eni ng vol tag es (> 35
VDC).

2.13 The vents on the mains supply units must not be covered! The units must be placed on firm, non­flammable surfaces, so that the air can enter unhindered. Cooling of the appliances occurs by forced
ventilation.

2.14 The mains supply units and the consumer loads connected to them must not be operated without
supervision. Measures must be taken to ensure the safety and protection of connected loads against
effects caused by the mains power supply unit (e.g. overload, breakdown of the mains appliance) and by
the connected load s t hemselves (e.g. current consu mption above the permi t t ed level).

Warning! Sensitive consumer loads must be protected against damage
by additional ext ernal measures!

2.15 In case o f fault, power supply units can output voltages over 50V DC, which causes risk,

even if th e specified o utput voltages of th e units are lower.

2.16 When w orking with electrical voltages, only too ls expressly permit t ed for the purpose are to b e used.

2.17 The outputs of the power supply units (output bushes/terminals) and leads attached to them must be
protected against direct contact. The leads used must therefore have a sufficient level of insulation
and/or dielectric strength and the contact points must be protected from being touched (safety bushes).

2.18 Connection of uninsulated metallic leads and contacts must be avoided. All of these points must be
protected with suitable, non-flammable insulation material or with other measures. The electrically
conductive components of the connected loads must also be protected from direct contact by
approp riate measures.

2.19 If it becomes apparent that safe operation is no longer possible, the unit must be disabled and secured
against unintentional operation. It is apparent that safe operation is no longer possible when:

- the unit or the mains cable show visible signs of damage

- the unit no longer works

- it has been stored for a long time under unsuitable conditions

- it has been transported under difficult conditions

3. Controls

1-power switsch
2 4mm sockets source 1
3 4mm s ock ets source 2
4 4mm s ock ets source 3
5 4mm s ock ets source 3
6 LCD - voltage display source 1
7 LCD current display source 1
8 poti voltage source 1
9 poti current source 1
10 LED constant current operati on source 1
11 LED constant current operati on source 1
12 LED temperature rise source 1
13 LED output source 4

source 1 to 3 ar in the handling the same !

4. Line-up

a) The euro - connector of the power supply unit into

- Note! Wit h longer operation with max. current consumption or in t he c ase of short-cir c uit the radi ator

box in t he power supply unit becomes very heat. A n overl oading of the power pack is displayed by the red LE D "
temperature rise ". At the same time by lowering the or iginal dat a of the longitudinal automati c c ontrollers of the dc
souurce against thermal overloading one pr otects.

Pay attention theref ore absolutely t o a suffic ient ventilation of the power supply unit not uncover, it never the
vent ilati on sl ots at the dev ice lower surfac e and at the rear wall t he air outlet opening of forced cooling. Absolutel y
make sure when connecti ng a c onsumer that this is not attached i n the switched on status. A switched on consum er can
lead with the link to the output terminals of the power supply unit to a sparking at the connect ing terminals, which again

b) Adjustable of the voltage

Turn first the adjusting knob for the current limiting a little to t he r ight side (i n the clockwise direc tion), until the LED (=
light emitt ing diode) for current l imiting is not l ighting. In the same instant the LED for t he voltage adjustment begins to
light up. Now you can adjust the desired out put voltage. The LCD di spl ay shows the adjusted output voltage.

c) Adjustment of the current limiting closing it the output

terminals with switched off power supply unit brief ly. Switch then the network on. The display for output current
displays,

depending upon adjustment of t he adjusting knob for current limi ting, a value. Stop the current limiting, i.e. the "
maximum str eam ", with whic h the power supply unit is to limit. After adjustment they open the short -circui t with
switched off power supply unit, si nc e otherwise an outline spark c an develop. Series connecti on / parallel connection
around optimal base values to achieve and ov er loading avoid should become preset the sources with f or instance the
same original data. Max. 2 sources in series m ay do geschalten to becom e.

Techn ical data

Specification type

DC output voltage 0-30V 0-30V 0-40V 5 V
DC output current 0-4A 0-4A 0-3A 5A

CV stability net +5/-7% 2mV 2mV 2mV 5mV
CV stability load 0-100% 40mV 40mV 40mV

CV remaining r ipple Uef f 2mV 2mV 2mV 2mV
CC stability net +5/-7% 2mA 2mA 3mA
CC stability load 0-100% 3mA 3mA 3mA
CC remaining ripple I eff 2mA 2mA 3mA
corr ec tion time load 10-100% 100µs
adj uster Uoutput / Iout put wirewound potentiometers ten turns / wirewound potent iometers ten turns

di ssolution of adjusting 0,10%
characteristic U / I
display for U / I LCD 13 mm 3½ - digit LED
Operating temperatur e 0 - 35°C
output connect or 4 mm safety sockets
max. relati ve hum idity 85% by 35°C

AC i nput voltage 230 V +5% / -7% 48-62Hz

AC testing voltages EN 61010 ; EN 61558-2- 4
safety class I
dimensions WxHxD mm 451 x 134 x 324
weight kg 19
electromagnetic compatibility EN 61000-6-3 ; EN 61000-6-2

3225.71

50m

V

Statron Gerätetechnik GmbH

Ehrenfried-Jopp-Straße 59

15517 Fürstenwalde
Tel.: [phone]
Fax: [phone]

e-Mail : [e-mail]

Internet : www.statron.de