In this handy calibrator a digital manometer of the Swiss producer HUBER AG with the distinction of high precision, temperature compensation and long-term stability is built in. Pressure is generated by the integrated hand pump, the variable bellows serves fine pressure tuning and precise generation of low pressures. At request, this instrument can be supplied with five additional gauging ports (quick connectors), so that various blood pressure manometers can be checked simultaneously to save time and costs. PC can be connected by the provideable RS 232 interface. A PC can be connected over the available RS 232 interface.