DPM1B
Operators Manual
4
The Tester has the following features:
•
Easy-to-read liquid crystal display (LCD)
•
Capable of measuring and generating positive and negative
pressures
•
Lightweight and portable
•
Operates with air or liquid
•
An easily accessible knob for zeroing the unit
•
LO BAT displayed on the LCD when the battery is low. The
battery can be accessed and replaced externally
Applications
Many hospital and laboratory instruments measure pressure for
diagnostic purposes. Mercury and water manometers,
sphygmomanometers, and blood pressure monitors are some of these
devices. Maintenance and calibration of these instruments requires a
device capable of both generating and measuring pressure. The Tester
was designed to fit this requirement, particularly in the area of blood
pressure transducers.
The Tester was designed to improve and simplify the measurements
necessary for determining the accuracy of any direct blood pressure
monitoring system. Vacuum (negative) and positive pressures
from
−
300 mmHg to
+
300 mmHg can be generated within the Tester
and applied to a system under test. The pressure delivered by the
pneumatic transducer tester is indicated on a liquid crystal display for
quick comparison to the monitor.
The accuracy of mercury or water manometers can be verified with the
Tester. Pressures can be applied simultaneously to the manometer to
be tested and the Tester using a Y-connector. Pressure is applied to
the system as normal, usually with a squeeze bulb. The results can be
compared between the Tester and the manometer under test.
Testing Capabilities
Verifying the proper operation of a blood pressure transducer can be a
tedious and time-consuming task. Usually a mercury or water
manometer is used to generate known values of pressure while the
transducer's response is monitored. A malfunctioning transducer shows
up when comparing the output of the manometer versus the output of
