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IMG-LPP08

LTR LR-Cal LPP 08

sku Product SKU:  LTR-LPP08

The pressure test pump LR-Cal LPP 08 is used to generate pressure and vacuum for checking, adjusting and calibrating mechanical and electronic pressure measuring instruments by comparative measurements in the low-pressure and vacuum range. The pressure tests may be carried out in laboratories, workshops or on-site at the measuring point.

If the instrument to be tested and a sufficiently accurate reference measuring instrument are connected up to the pressure test pump, the same pressure is applied to the two measuring instruments when the pump is operated. By comparing the two measure values at random pressure values, the accuracy can be verified or the unit under test can be adjusted.

The LR-Cal LPP 08 is a pneumatic pressure test pump for low-pressure ranges up to 8 bar with a change-over switch to vacuum down to -850 mbar. Despite its compact dimensions, the pressure test pump is easy to operate and allows for the exact generation of the required test pressures. The maximum pressure or vacuum achievable depends on the attached test volume. The smooth-running pressure generation and the integrated fine adjustment valve allow a safe and precise setting of very small positive resp. negative pressure values in the range of mbar.

The unit under test and the reference instrument can be easily connected with the supplied accessories.

Included in the scope of standard delivery:

  • Pressure test pump LR-Cal LPP 08
  • T-piece, one side with 1/8" BSP male thread for direct mounting to the pressure test pump, other sides with quick hose connectors (Push&Pull) for pneumatic hose 4 x 2 mm. Easy mounting thanks to supplied o-ring. Max. torque 15 Nm.
  • 2 pcs. pneumatic hose 4 x 2 mm, each length 0.5 m
  • 2 pcs. quick connectors (Push&Pull) with 1/8" BSP male thread, for hose 4 x 2 mm
  • 1 Adapter 1/8" BSP female x 1/2" BSP female, for connecting reference instrument (with 1/2" BSP male thread)
    Thanks to integrated o-ring tightening without tools, just by hand
  • 1 Adapter 1/8" BSP female x 1/4" BSP female, for connecting unit under test (with 1/4" BSP male thread)
    Thanks to integrated o-ring tightening without tools, just by hand
  • Operating manual

ZAR 0,0000

Kel-21-py

Keller Series 21PY

sku Product SKU:  KEL-21PYs

Ultramodern welding techniques and advances in the miniaturization of electronic circuits now make it possible to manufacture a pre-insulated, piezoresistive micro-transmitter with properties that were no more than a dream 10 years ago.

The circuit is based on the PromComp principle which KELLER offered in a separate version as a laboratory device 20 years ago when it attained accuracy of 0,1 %FS over a temperature range of 100 K. In those days the electronic circuitry was the size of a cigar box, but now it can be accommodated on a print that is a mere 12 mm in diameter.

Although this digital component is only slightly more expensive to produce than an analog circuit, it allows a piezoresistive sensor to be calibrated to an accuracy of 0,5 %FS over a potential temperature range of 100 K.

A temperature sensor divides the temperature range into fields with a width of 1,5 K each. Two values are assigned to each field in an EEPROM: one value for the zero point and another for the amplification, determined by mathematical interpolation in the calibration process. During operation, the corresponding values are ‚switched in’ at the relevant temperatures. The electronics make it possible to assign up to 120 fields so that a temperature range of 180 K can be covered. The 100 K restriction for series 21 PY is due to the sensor

This means that more or less any temperature can be the ‚calibration temperature’ for these transmitters. Calibration and temperature errors within a temperature field are within ± 0,2 %FS. The remainder of the error bandwidth of ± 0,5 %FS can be attributed to linearity and stability errors. So it’s goodbye to the days when sensor engineers had to struggle every day with TKN (zero point) and TKG (gain/amplification) problems.

The 21 PY product line is outstanding due to its extreme ruggedness towards electromagnetic fields. The limits of the CE standard are undercut by a factor of up to 10 with conducted and radiated fields, thus making this product ideal for use in harsh industrial environments.

ZAR 0,0000


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