HND-P231/-233/-236/-239
page 4
HND-P231/-233/-236/-239 K05/0422
5. Operating Principle
The highly precise KOBOLD hand-held pressure measuring devices HND-P231/-
P233/-P236 are measuring devices with integrated pressure sensors. They have
two pressure measurement inputs on the top of the housing, which are connected
to the measuring points by means of stable metal connections and plastic hoses
that are available as accessories. Numerous measuring ranges in the
overpressure and under pressure range are available for various measurement
tasks, such as differential pressure measurement. In addition to pressure display,
these first-rate, compact, universally applicable measuring units offer additional
functions such as minimum/maximum value memory, a hold function, tare
function, automatic self-shut-off, or zero point offset. The devices with an
expanded spectrum of functions also have a logger function, a peak value
memory, minimum/maximum alarm, an adjustable measuring cycle, and
averaging.
The KOBOLD hand-held pressure measuring devices HND-P239 have an
integrated pressure sensor for absolute pressure measurement. The measuring
device is connected to the measuring point by means of a stable, metal
connection on the top of the housing and an optional plastic hose. This device
design offers the possibility of also displaying the barometric air pressure in
relation to sea level »zero«. In this case, air pressure is corrected by entering the
height above »zero« in meters. Naturally, these devices also have the
minimum/maximum value memory, a hold function, a tare function, automatic
self-shut-off function, and zero point adjustment. The KOBOLD HND-P239
devices also offer additional functions like the logger function, peak value
memory, minimum/maximum alarm, an adjustable measuring cycle, and
averaging.
6. Electrical Connection
6.1 Mains Operation with Power Supply
Warning:
When using a power supply please note that operating
voltage has to be 10.5 to 12 V
DC
. Do not apply overvoltage!! Cheap
12 V-power supplies often have excessive no-load voltage. We,
therefore, recommend using regulated voltage power supplies.
Trouble-free operation is guaranteed by our power supply HND-
Z002. Prior to connecting the power supply to the mains, make
sure that the operating voltage stated at the power supply is
identical to the mains voltage.
