Our biomedical measurement suite is an unstandardized means of measuring signals f rom an operator moving on a rotating object. For implementat ion at the customer's premises in accordance with the [1 ] standard, metrological certification was necessary. The metrological support included our certif ication program and a draf t for a checking method, together with pr imary-s tandard equipment developed to our specifications by the biomedical measurement section at the Al l -Union Physics Instruments Research Institute. The system is part of a suite for pr imary processing of biomedical data and is intended for recording from sensors, with the t ransformation and normalization of the signals, which are transmitted for processing to the computing center and to a recorder. The data entering the center are processed on-l ine, recorded on a printer, and shown on a VDU, and the center also manages the working parts. The suite is intended to handle many types of signal f rom sensors on the body: electrocardiograph ECG, electroencephalograph EEG, electromyograph EMG, electronystagmograph ENG, sphygmograph SG, rheograph RG, skin reaction SR, pneumograph PG, blood pressure BP, and body temperature BT. There are two parts to the suite: 1) a portable one, which is a unit attached directly to the rotating object and consists o f a communication unit with buil tin galvanic deeoupling and eight measurement modules located one next to another, dimensions 235 • 310 • 35 mm; and 2) the main one, which is located in the computing rack and consists of the control unit. The components per form the following functions: the measurement modules t ransform the signals; the communication unit links up for commands and calibration signals f rom the control unit; the decoupling unit provides electrical insulation between the data circuits and the power supplies to protect the Operator f rom the supply voltages; and the control unit generates the commands either in manual mode or automatically f rom the computer and transmits the data along the communicat ion lines up to 15 m long to the computer or to the recorder. The channel structure and signal sequence are as follows: the signals are directed to the measurement modules, where they are converted and passed through the communicat ion and decoupling units to the control unit with output to the computing center or recorder. The 23 measurement channels in the portable unit were certified, which included the three ECG, PG, and BP channels with output to a printer in the center, while the others had output to a recorder. The standard facilities were units developed at the above institute for checking the channels: correspondingly all of them apart f rom BT. In all, there were nine such. The BT channel was certified by means of a standard resistance box. Each apparatus consisted of a power supply and a unit that included a generator and meter. The generator produced standard test signals whose parameters were close to those provided by the operator as well as sinusoidal, triangular, sawtooth, and square ones. For example, the ECG system reproduced the electrocardiogram with parameters set on the front panel. The digital meter recorded the instantaneous voltage amplitudes and the time intervals. Major technical characteristics: generator ranges in ampli tude f rom 1 mV to 10 V and with repetition periods f rom 0.01 to 100 sec; max imum permissible errors in amplitudes +0.7% (of the upper limit to the subrange) and in periods +0.1%. Meter: limits to permissible errors in measuring signal parameters __.1% in ampli tude in the range 1-I0 V or -+3% for 1-10 mV, and in period -+1%.