KAL 84 Instruction Manual
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KAL 84 Instruction Manual
2.2.1 The 4 ½ digit LCD with “Low battery”- function
The 4 ½ digit LCD displays the pressure measured by the internal reference sensor. If
a test object has been connected to the instrument, the actual value displayed will
agree with that of the test object after the settling time of the instrument.
In case of “Low-battery” showed on the display, recharge or replace the battery. The
displayed values do not agree with the system-pressure in that case.
2.2.2 ON/OFF
Pressing this key once turns the instrument on. Pressing this key a second time turns
the instrument off.
2.2.3 Backlighting
Pressing this key once turns the backlighting on. Pressing this key a second time
turns the backlighting off.
2.2.4 Analog output
The analog output—connected via common banana plugs (d = 4mm) with at least 2
k
of resistance—generates an output voltage proportional to the pressure.
2.2.5 Units of pressure
This feature allows the operator to toggle between 2 units of pressure, e.g., Pa and
mmHg. A red LED indicates the units used.
2.2.6 Pressure ports
These ports are for connecting the test object to the KAL 84 (inner diameter of tubing
= 5 mm)
2.2.7 Purge valves
Purge valves are used to vent any overpressure that results when the test object is
connected to the system. Turn the purge valves to the left to open. The purge valves
should also be opened if the transducer dial has been turned as far as it will go in only
one direction and then returned to its starting position when the test object has been
connected.
The purge valves should always be closed when taking measurements!
2.2.8 Automatic zero-point calibration
Press the “>0<” key to calibrate the zero point (typically performed before each
measurement).
The purge valves must be opened before calibrating the zero
point.
The final place on the display reading may be off by a few digits after
calibrating the zero point. This is within the acceptable range of tolerance.
The display is not lit while the zero point is being calibrated and may need
to be switched on again afterwards.
