R
PHYWE Systeme GmbH & Co. KG
Robert-Bosch-Breite 10
D-37079 Göttingen
Phone
Fax
E-mail
+49 (0) 551 604-0
+49 (0) 551 604-107 info@phywe.de
internet www.phywe.de
Power supply, high voltage, 0...25 kV 13671.90...99
The unit complies with the corresponding
EC guidelines.
Operating Instructions
Fig. 1: Front view of Power supply, high voltage, 0...25 kV 13671.93
1 SAFETY PRECAUTIONS
• Carefully read these operating instructions before operating this instrument. This is necessary to avoid damage to it, as well as for user-safety.
• Check that your mains supply voltage corresponds to that given on the type plate fixed to the instrument.
• Install the instrument so that the on/off switch and the mains connecting plug are easily accessible.
• Do not cover the ventilation slits.
• In particular, the circuit that is to be connected
(experimental set-up) is to be first completely set up and rechecked in the dead condition (absolute separation from the mains, mains plug unplugged!), before the power supply is connected to the mains and switched on.
Interventions or changes to the circuit are only to be made in the dead condition.
• Do not make series connections of high voltage instruments.
• Do not connect external capacitors to the output sockets, as then, due to the higher energy of discharge (> 150 mJ), safety to touch is no longer given.
• Only use the instrument in dry rooms in which there is no risk of explosion.
• Only use the instrument for the purpose for which it was designed.
2 PURPOSE AND DESCRIPTION
The high voltage power supply supplies a floating DC voltage which is adjustable in the range 0 to 25 kV. The output voltage is regulated. If required, the positive or negative pole can be earthed.
The output is short-circuit proof. The maximum extracted continuous current is limited to 0.5 mA and the momentary available discharge energy is limited to 150 mJ to enable experiments to be conducted safely. The output sockets prevent the hands approaching within the flashover region of the metal parts under high voltage.
The unit is particularly suitable for carrying out experiments in electrostatics. Even the operation of gas discharge tubes is possible without a series resistance. However, it should be noted that due to reasons of radiation safety the conducting voltage as indicated on the digital display should not exceed
5 kV unless the tubes are expressly approved for higher conducting voltages.
13671.90...99/0305 1

3 OPERATION
The unit is accommodated in an impact resistant plastic housing. A retractable carrying handle is recessed into the top of the unit. A similar component is recessed into the base and can be folded down so that the instrument slopes down towards the back. Four rubber feet provide resistance to slipping. The unit can be stacked onto other units having the same housing, because the rubber feet fit into cup-shaped recesses of the unit beneath, ensuring that the top instrument does not slide off. With stacked units the sloped orientation is only permissible for the uppermost unit.
For connecting the unit to the AC mains, a 1.5 m long lead is supplied which is plugged into the equipment plug at the back of the unit. The rectangular fuse holder situated above the equipment connection plug can only be opened with the aid of a screwdriver or similar tool when the mains lead is withdrawn.
Changing the primary safety fuse:
The fuse holder is in the upper part of the mains socket of the digital counter, and so is only accessible when the connecting cord is not plugged in. Unplug the connecting cord, open the fuse holder using a screwdriver, take out the defect fuse and replace it with a new one (first check the specification of this against the data on the type plate), then fit the fuse holder back in the mains socket.
Should this fuse blow when the instrument is switched on, never replace it with a more resistant fuse! A defect is indicated and the instrument must be returned to the Phywe service department for repair.
Before switching on the unit with the mains switch at the back of the unit, the setting up of the experimental arrangement should be completed and the apparatus connected up. The control knob should be turned fully anticlockwise. If required, one of the high voltage sockets can be earthed by linking it with the yellow and green earth socket on the front panel.
The three-figure digital display indicates the high voltage supplied to the output sockets. The figure of 25 kV is only obtained with a current load of less than 0.5 mA. A collapse of the output voltage may be due to inadequate insulation on the connecting leads. When the high voltage is obtained from unearthed sockets, high-tension leads should therefore be used (order no. 07366.00/07367.00).
5 TECHNICAL DATA (typical for 25°C)
Operating temperature range 5...40°C
Relative humidity < 80%
I see type plate
Protection class
Connecting voltage
(+6%/-10%)
Mains frequency
Power consumption
Output voltage
Overload capability
Voltage display
Short-circuit current
Discharge energy
Residual ripple
Output sockets
50/60 Hz approx. 45 VA
0...25 kV, continuously adjustable, regulated short-circuit proof
LED display (3-figure)
20 mm high
0.5 mA
< 150 mJ
≤ 0.05 % special safety sockets
Mains fuse see type plate
(5 mm x 20 mm)
Housing dimensions (mm) 230 x 236 x 168 (W,H,D)
Weight approx. 3 kg
6 GUARANTEE
We guarantee the instrument supplied by us for a period of
24 months within the EU, or for 12 months outside of the EC.
This guarantee does not cover natural wear nor damage resulting from improper handling.
The manufacturer can only be held responsible for the function and technical safety characteristics of the instrument, when maintenance, repairs and changes to the instrument are only carried out by the manufacturer or by personnel who have been explicitly authorized by him to do so.
7 WASTE DISPOSAL
The packaging consists predominately of environmental compatible materials that can be passed on for disposal by the local recycling service.
Please contact your municipal administration for information on the disposal of instruments.
4 NOTES ON OPERATION
This high-quality instrument fulfills all of the technical requirements that are compiled in current EC guidelines. The characteristics of this product qualify it for the CE mark.
This instrument is only to be put into operation under specialist supervision in a controlled electromagnetic environment in research, educational and training facilities
(schools, universities, institutes and laboratories).
This means that in such an environment, no mobile phones etc. are to be used in the immediate vicinity. The individual connecting leads are each not to be longer than 2 m.
The instrument can be so influenced by electrostatic charges and other electromagneric phenomena that it no longer functions within the given technical specifications. The following measures reduce or do away with disturbances:
Avoid fitted carpets; ensure potential equalization; carry out experiments on a conductive, earthed surface, use screened cables, do not operate high-frequency emitters (radios, mobile phones) in the immediate vicinity. Following a blackout failure, operate the on/off switch for a reset.
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