Introduction To The Operation Of Hm7044; First Time Operation; Power On; Setting The Parameters - Hameg Instruments HM7044 Manual

Introduction to the operation of HM7044

First time operation

Please observe especially the following notes:
– The line voltage indicated on the rear panel corresponds
to the available line voltage, also, the correct fuses for this
line voltage are installed. The fuses are contained in the
line voltage connector housing.
– The connection to the mains is either by plugging into
a socket with safety ground terminal or via an isolation
transformer of protection class II.
– No visible damage to the instrument.
– No visible damage to the line cord.
– No loose parts fl oating around in the instrument.

Power on

By pushing the POWER button
After switch-on the HM7044 has the same confi guration as
switched off. All instrument settings are saved in a non-volatile
memory and are read back after switch-on. The output signal
is disabled after switch-on by default.

Setting the parameters

1. Selecting the channels

By pushing the SEL-button
One or more channels can be selected by operating the buttons
I, II, III and IV . The CH.-LEDs
blink. The following settings are applied to the selected chan-
nels. After a successful parameter entry the selection mode
is automatically left. If several changes shall be done for the
same channel(s), the automatic termination of the selection
mode can be prevented by operating the PROG.-button
the SEL-button . The PROG. LED
can be left by pressing the SEL-button
the instrument is turned on.
the selecting mode is activated.
of the selected channels
after
glows. This setting mode
or the PROG.-button
S e t t i n g t h e p a r a m e t e r s
again. The PROG.-LED
CH.-LEDs I, II, III and IV are blinking. If the selection mode
is not activated, every setting is automatically done for all
channels. By pressing the SEL-button
mode is left.

2. Setting of the nominal value of the output voltage

The nominal value of the output voltage can be set with the
respective rotary control
keypad :
If the output voltage of a channel shall be adjusted with the
respective rotary control the V-LED
mode is activated by operating the V-button
rotary control clockwise the nominal value of the output
voltage is increased and a counterclockwise rotation de-
creases it. The faster the rotary control is turned, the higher
the increase of the value of one revolution will be.
If the numeric keypad is used for parameter setting, the
changes of the nominal value of the output voltage will be car-
ried out for all selected channels. Thereby several channels
can be set at the same time. After selcting the channels to be
changed (the respective CH.-LEDs
nominal value of the output voltage can be entered. The last
entered fi gure can be deleted by operating the DEL-button
The entry is fi nished by pushing the V-button
is selected (all CH.-LEDs
set to the entered value.
Entered value
0.3
3
3.0
30
301
3012
Examples:
Setting of all channels to 2 V:
– Push buttons 2 and V
Setting of channels I and III to 4 V:
– Push button SEL
– Push buttons I and III
– Push buttons 4 and V
is off. If no channel is selected, all
again the selection
as well as with the numeric
has to glow. This setting
. By turning the
are blinking), the required
. If no channel
do not blink), all channels will be
Accepted value
0.30 V
3.00 V
3.00 V
30.00 V
–
30.12 V
Subject to change without notice
.
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