The 7250LP is available in three different range configurations, each a dual range instrument. Select either the 10 inH20 and 30 inH2O combination, or the 20 inH2O and 60 inH2O or the 35 inH2O and 100 inH2O range combination. Each combination provides a precision to 0.005 % of reading from 10 to 100 % of the higher range. For pressures from 0 to 10 %, the precision is a fixed error equal to 0.005 % of 10 % FS. This unmatched precision is achieved by the unique quartz pressure sensing technology that puts the pressure in direct contact with the quartz element, eliminating mechanical linkages and metal diaphragms. Since this is a differential sensor, the reference side of the 7250LP can be connected to the reference side (low side) of the device under test. Therefore, disturbances due to room drafts, HVAC systems and opening/closing doors, which can have a detrimental effect on the calibration process, are eliminated. The 7250LP provides both unequalled precision and excellent long term stability due to the inherent properties of quartz. For example, the total uncertainty for a 10/30 inH2O range combination over a one year calibration interval is 0.009 % of reading or 0.00015 inH2O (whichever is greater). The 7250LP comes standard with an ISO/IEC 17025 accredited calibration report.
For more details about this product, Download Fluke 7250LP Low Pressure ControllerCalibrator Datasheet.