Hameg HM7044 Manual Download Page 13

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Specifications

(((((Ref. temp.: 23° C ±2° C)

Ref. temp.: 23° C ±2° C)

Output I, II. III, IV with identical specs

Constant V

Constant Voltage Sour

oltage Sour

oltage Source

Voltage Setting:

0-32V DC

Resolution:

10mV, 4-digit display

Setting Accuracy:

±5 digit

Ripple (rms):

<1mV, voltage reg.

Constant Current Source

Current Setting:

5 m A - 3 A

Resolution:

1mA, 4 digit display

Setting Accuracy:

±8 digit

Ripple (rms):

<1mV / 100µA current reg.

Parallel Mode

Voltage:

32V max.

Current:

12A max.

Power:

384W

Serial Mode

Voltage:

128V max.

Current:

3A max.

Power:

384W

Tracking Mode

racking Mode

Voltage tracking with 4 outputs

Electronic Fuses

Current Setting:

5mA-3A, each output switch able

Number of Fuses:

4, each output switch able

Programmable Output Inhibit

On over current at one output, up to four outputs
can be disconnected from load, selected by the user

Outputs Inhibit Switch

All pre-selected outputs are switched off with one push-

button

7-Segment Displays

8 displays, 4-digit voltage- and current display

LED Indicators

Output enabled; Current Limit enabled; Fuse enabled;

Output On

Interface

Serial RS-232 for PC connection

Command-Processing Time: 100ms, until output vol-
tage begin to change following receipt of digital data

General Data

Internal Resistance

Static:

Ω

typical

Dynamic:

200m

Ω

typical

Load Regulation:

10ms, step change in load current from

5mA to 1.5A To recover within 100mV of its previous level

Stability:

0.1mV, at line voltage variation of up

to 10% at <80W

Temperature Coefficient:

100ppm/°C

Over-Current Switch Off:

<1ms at an output

power step change from 96 W to 0W.

DC Floating Voltage:

±150V, outputs to chassis ground

Power Consumption:

530W

≅

384W output power

Ambient Temperature:

10°C to +40°C

Relative Humidity:

10 to 90%, without condensation

Line Voltage:

115/230V +-10%, 50-60Hz

EMC Emission:

VDE0871; CISPR11

EMC Susceptibility:

IEC 801

Safety:

Class I (ICE1010-1, VDE0411)

Weight:

approx. 8.5kg

Dimensions:

285

125

380mm

Programmable Power Supply HM7044

Lineare Output Stages

4x 0-32 VDC/ 3 A + Sense

Max. 128 V or 12 A

Tracking Mode with free selectable Outputs

Keyboard and RS 232 control

Current control and over current protection

The HM 7044 offers DC voltages from 0 to 32 Volts at each
of its 4 outputs and a maximum current of 3 Amps at each
output. All outputs are independent, electrically isolated.
The outputs can be combined in either a series or parallel
array to either increase the voltage (max. 128 V) or the
current (max. 12 A) capabilities.
Voltage tracking mode is enabled in any output combina-
tion. E.g. output I and II as one tracking pair and output III and
IV as the second tracking pair.
In addition to the HM 7044 current and voltage control
functions, each output has an over current protection cir-
cuit. The latter switches the output off if the maximum
permissible current has increased, instead of limiting the
current. The over current switch off function can also be set
in such away that it effects several selected outputs at the
same time, if over current occurs on one of these outputs.
Voltage drop on the load cables is compensated automati-
cally over a wide range in combination with SENSE at each
output.
For power efficiency the HM 7044 is equipped with a
controlled switched mode power supply for each output
stage. These are followed by controlled linear output stages
with the advantage of low ripple and noise at the output.
The HM 7044 can be operated manually or via the built in RS
232 interface.