Background
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Pressure transducer calibration is
achieved most conveniently and precisely by application
of the calibrating pressure to all transducers simultaneously.
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If this calibration is done prior to
connection of the manometric assembly, this is done best
by application of a standard air pressure to each transducer
simultaneously after it has been filled with water.
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This requires a connector arm with
a female luer fitting for each transducer, a means of
raising pressure in a controlled manner, a calibrating
pressure gauge in the appropriate range, and a means of
sealing the calibrator tightly, once it has been pressurised
to the set level.
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If calibration is done after connection
of the manometric assembly, this should be fully filled
with perfusate, and then the assembly should be held horizontal
at the zero position.
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Once the zero position is calibrated,
the assembly is raised a known distance, thus applying
a standard calibrating hydrostatic head. |
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Dentsleeve
air pressure calibrator
The Dentsleeve
calibrator consists of a main silicone rubber tube manifold
with silicone rubber side arms which meet the needs described
in 'Background'.
The standard designs match the channel spacings of Dentsleeve
manometric perfusion pumps.
Standard calibrators are available for simultaneous calibration
of
6-21 channels on Dentsleeve
perfusion pumps.
The design minimises tangling of side arms to individual channels.
The calibrator includes special design polycarbonate taps at
each end of the calibrator manifold for easy removal of any
perfusate trapped in the calibrator lumen.
The taps used seal very effectively, and so the pressure in
the calibrator is well maintained during calibration.
Slide pinch clamps are supplied on each calibrator sidearm for
convenient closure of sidearms not required for a particular
calibration.
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