Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent
1983-03-25
1985-03-05
Goldberg, Gerald
Measuring and testing
Instrument proving or calibrating
Volume of flow, speed of flow, volume rate of flow, or mass...
73168, G01F 2500
Patent
active
045023190
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
The invention relates to a testing appliance for a metering apparatus.
Metering apparatuses of the type which are used, in particular, for the aftertreatment of water, must be tested at defined intervals. In doing so, various functions must be tested, namely the metering accuracy, that is to say the rate at which the metered flow is delivered, the presence of adequate operating voltages, the triggering of the metering pump, the functioning of the indicator lamps, and the pressure developed by the metering pump. In addition, in order to perform maintenance at the same time, it may be necessary to flush the metering system with warm water. For this purpose, the apparatus is opened, and the individual functions are tested by means of appropriate instruments.
The object of the invention is to provide a testing appliance which enables, in a simple manner, all the functions of the metering apparatus to be tested and which, in particular, renders the opening of the metering apparatus, for this purpose, superfluous. Morever, it is intended that it should be simple to flush the metering apparatus.
This object is achieved by means of a testing appliance for a metering apparatus, which appliance comprises, according to the invention, a control unit which can be connected to the metering apparatus, as well as a measuring device which can be connected to the outlet of the metering apparatus.
Further features and advantages of the invention are evident from the description of an illustrative embodiment, by reference to the Figures, in which:
FIG. 1 shows a representation, partially in perspective, of a metering apparatus with the testing appliance;
FIG. 2 shows a representation of the testing appliance and of the metering apparatus, in the form of a block circuit diagram.
The metering apparatus 1 possesses, in the conventional manner, a water meter 2, a metering-pump drive 3, and a metering pump 4. The pulses coming, as a function of the flow-rate, from the water meter 2 are applied to the input side of the metering-pump drive. The metering pump 4 is connected to a stock reservoir 5, from which, in normal operation, the chemical to be metered is drawn off by suction. The metering pump 4 leads, via a metering line 6, to a metering valve 7 which is provided on the outlet side of the water line 8. At its free end, the metering line 6 possesses an appropriate coupling 9, by means of which the metering line can be screw-connected to the metering valve.
The testing appliance 10 possesses a measuring device 11, with a measuring container 13 carrying a scale 12. At its base, the measuring container 13 is connected to a feed line 14 which is connected, at its other end, to a connection part 15, the dimensions and design of which correspond to the connection part of the metering valve 7, so that it is possible to connect the coupling 9 to the connection part 15. A manometer 38 and a pressure-holding valve 16 are provided in the feed line 14, in succession to the connection part 15, and a drain valve 17 is provided between this pressure-holding valve and the measuring container 13.
The testing appliance 10 further includes a control unit 21 with a pulse generator 18. The output terminal of the pulse generator can be connected to an input terminal of the metering-pump drive 3. The pulse generator 18 is designed in a manner such that it is possible to adjust the pulses, and it possesses a pulse counter 19 and a resetting device 20. In addition, the control unit 21 possesses indicator lamps 25, 26, 27, corresponding to the indicator lamps 22, 23, 24 of the metering apparatus, in particular for indicating that the apparatus is operating, the metering cycles of the pump 4, and a shortage of the chemical. The indicator lamps 25, 26, 27 can be connected to the corresponding indicator lamps 22, 23, 24 by means of lines 34, 35, 36. This enables the testing appliance 10 to supply a test voltage to the lamps 22, 23, 24 to test whether they are operating. In addition, a key 28 is provided for the purpose of starting the pulse gen
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501 Grunbeck Wasseraufbereitung GmbH
Brown Donald
Goldberg Gerald
Noland Tom
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