Technical data

The power is supplied by a fused plug for non-heating appliances. The PN 300 is protected

by a fuse of T 4 AL/250 V for 230 V~ or T 8 AL/250 V for 115 V~ mains voltage

respectively. The operating voltage indication shows which operating voltage is to be used.

The interfaces GPIB und RS-232C serve the purpose of data transmission on remote via

external devices.

The mains plug with fuse, the operating voltage indication, the interfaces and the type plate

of the unit can be found at the back of the power supply unit.

Note

: All buttons are provided with the function Autorepeat, i. e. constant pressing

causes respective input repetitions.

6 Parameter Settings

6.1 Starting

For external control of the unit the corresponding connecting cable of the system interface

GPIB or RS-232C has to be connected before switching on the operating voltage.

After pushing the button Power switch [1] an internal test is started and the following

message appears on the display [5]:

Testing: UNIT

The variable UNIT describes the present testing unit. The proper functions of the processor

CPU, of the ROM and RAM memory, of the KEYboard, of the BATTERY and DISPLAY are

tested. If everything is in order, the following message is displayed:

Testing: UNIT

.......Passed

Otherwise the following message appears on the display:

Testing: UNIT

........Error

and the unit interrupts the test until the defect is eliminated (not in the case of Battery

Error).

When the test is successfully completed the previous settings of the RAM are loaded and

activated.

In the case of Battery Error the following electrical values are set for sources A and B:

0.00V 0.001A

After switching on the outputs A and B are always inactivated. All of the settings are

indicated via the LED’s from [6] to [10].

Operating Instructions PN 300

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