Application

The pressure measuring modules have been designed particularly for mobile use on pressurized equipment requiring calibration. They are sturdily designed for rugged applications and with only 150 grams extremely light-weight. ® model 4423. In this way, pressures can be quickly and economically checked for compliance with required specifications and calibrated.The 7132 series pressure module is connected through the 7130 pressure module adapter to the DIGISTANT Modules with very different measuring ranges are available. The pressure is introduced through a connector or two connectors (differential) with a 1/8" NPT female.

Description

The "against atmosphere", vacuum and dual-pressure types measure in relation to atmospheric pressure. The absolute pressure sensors measure with reference to absolute zero. The difference pressure measures on one side with reference to an indicated direction. Units for displaying are psi, mbar, kg/cm2, atmos, kPa, Mpa, inHg, mmHg, inH20, mmH20 or a pressure unit defined by the user. "Against atmosphere" and absolute-pressure types are insulated and medium-compatible with stainless steel 316SS. Compound, Vacuum and difference sensors must be pressurized only with clean, dry pressure media.

Manual pumps are built as grip-type pumps, spindle pumps or lever pumps, depending on the pressure range. The majority have a fine adjustment system which allows the pressure to be adjusted very precisely. In this way a customer's pressure measuring system can easily and economically be checked using the pressure module connected to the DIGISTANT® model 4423 and a pump.

Description hand-operated pumps

Manual pumps are used to generate pressure and vacuum, thus allowing mechanical and electronic pressure measuring instruments to be checked through comparative measurements, adjusted and calibrated.

Application fields where these pressure measurements are particularly valuable include:

• Power stations
• Chemical industry
• Refineries
• Machine building
• Servicing shops etc.

Depending on the calibration range, a manual pump, a spindle pump or a lever pump are used to generate the pressure. The pressurized medium may consist of air, water or oil. The range of pressures extends from vacuum up to 1000 bar. Each pump has a pressure drop rate typical for its type. This may be up to 3 % of its maximum pressure value within five minutes and depends, among other things, on the medium, the temperature and on the volume of the cylinder.