Diagnostics Device UD-01

The diagnostics device UD-01 allows to detect and remove probable failures in flow channels of heat meters directly at installation of the meter.

During installation, operation or repair in some cases there is a necessity of detection of a faulty heat meter component. In a general the set of a heat meter components looks as follows:

• data processor (measuring unit);
• interface cables (IC);
• temperature gauges (resistant thermal converters– RTC);
• ultrasonic flow gauges (FG) in set of flow measuring section (FS).

In a heat meter it is necessary to make a difference between two types of measuring channels: the channel of temperature measurement and the channel of flow measurement. In most cases due to instrument readings in basic mode or to system of self-diagnostics it is possible to determine type of the faulty channel.

At search of a faulty element in temperature measuring channel there are no difficulties. Known methods of element diagnostics of temperature measuring channel (measurement of resistance of RTC, ring-out of interface cables, connection of resistance box to the data processor, check of standardized statistical characteristic of RTC, etc.) allow to isolate a faulty element.

Search of failure in the flow measuring channel by means of traditional methods has no results. That is why necessary to take into account specificity of characteristics of flow gauge piezoceramics and also waveforms and signal swings.

In this case the Device of diagnostics UD-01 is applied. It allows:

• To determine a faulty element in a circuit: the data processor - interface cabels- ultrasonic flow gauges;
• To control the serviceability of data processors of heat meters NVM-93.02 and SVTU-10 or SVTU-10М;
• To control the serviceability of the temperature and pressure measuring channels of heat meters NMV-93.02, SVTU-10 or SVTU-10М with a 44-contact cable header.

The device allows to make diagnostics in laboratory and directly on the object of installation with no dismantling of FS, FG and IC of heat meters NMV-93.02, SVTU-10 or SVTU-10M.

 Documentation UD-01 (pdf - 0.7 Мб) - russian version