9 ELECTRIC DEVICE FOR THE MEASUREMENTS OF HEAT CONSUMPTION AND/OR WATER CONSUMPTION AND ACCESSORIES THEREFORE, NAMELY, IMPULSE CONTACT COUNTER, SERVICE HOUR COUNTER, INDICATOR CONTACTS, NAMELY, DIRECT READOUT BY MEANS OF BUILT-IN DISPLAY AND FOIL KEYBOARD, DATA READOUT VIA AN OPTICAL INTERFACE ON PC OR LAPTOP, DIRECT READOUT ON A PERMANENTLY CONNECTED PC, TELEPHONE MODEMS AND EXTERNAL PC MASTER TERMINALS FOR USE IN REMOTE DATA TRANSMISSION; COMPUTER, COMPUTER SOFTWARE FOR MANAGING A CONTROL ROOM INCLUDING TECHNICAL SERVICE, BLANK MAGNETIC RECORDING CARRIER, SOUND AND IMAGING RECORDING, TRANSMISSION AND REPRODUCTION DEVICES, NAMELY, DATA COLLECTOR