Hand test pumps serve as pressure generators for the testing, adjustment and calibration of mechanical and electronic pressure measuring instruments through comparative measurements. These pressure tests can be carried out in the laboratory or workshop, or on site at the measuring point. Easy operation If one connects the test item and a sufficiently accurate reference measuring instrument to the hand test pump, on actuating the pump, the same pressure will act on both measuring instruments. By comparison of the two measured values at any given pressure value, a check of the accuracy and/or adjustment of the test item can be carried out. In order to approach the measuring points exactly, the hand test pump features a fine adjustment valve. Easy handling The model CPP30 hand test pump, despite its very compact dimensions, enables a simple and accurate test pressure generation of up to 35 bar (500 psi), with an switchover to vacuum generation of down to -950 mbar (28 inHg). The maximum pressure or vacuum achievable is dependent upon the connected test volume. For the precise setting for accurate comparative testing, the pump features a fine adjustment valve. The reference instrument is screwed directly to the top of the pump, and the test item is connected using a connecting hose with a G ¼" female thread, included in delivery.