Description
The
PR-265 incorporates sophisticated integrated
circuits and a new fused silicon monolithic cavity pressure
sensor to provide a high level, fully-conditioned,
and temperature compensated output. The 316L stainless
steel monolithic pressure cavity not only provides
media compatibility for most applications, but also offers a leak proof solution for today's
environment conscious customers.
Two
industry standard output
versions
are available, 4-20
mA 2-wire loop or a field selectable 0-5 VDC/0-10
VDC. Wide 12-40 VDC or 12-35
VAC unregulated
supply voltage and a broad
0°F-180°F
compensated temperature range ensures compatibility
to most
of the applications.
Rugged NEMA 4 (IP-65) enclosure, gasketed cover,
external mounting bracket, fully temperature compensated
NIST traceable accuracy and a liberal five year
warranty are some of the features which make
the PR-265 the
industry's most reliable,
rugged, and economical pressure sensor.
The PR-265 sensing element is a 100% state silicon
strain fused directly onto the 316L stainless steel
monolithic pressure cavity. The pressure cavity is
machined out of a solid rod and does not incorporate
any welds, seams, or bonds. In this way, the sensor not
only offers excellent linearity, repeatability, and
sensitivity, but also exhibits negligible hysteresis and
withstands significant overpressure without zero shift.
The monolithic nature of the cavity ensure not only
leak proof operation but also enhances the overpressure
and burst pressure specifications. The pressure cavity
design incorporates novel techniques to isolate the fused
silicon sensing element from installation related stress
thereby ensuring zero integrity. The 316L stainless steel
offers excellent media compatibility to most of the
industrial and commercial applications.
The PR-265 incorporates sophisticated integrated
circuits to provide a high level, fully
conditioned and temperature compensated output.
On VDC output units, two additional field selectable
options are available: dual outputs 0-5 or 0-10 VDC,
and dual unregulated supply voltages 12-35 VAC or 12-40 VDC. By merely changing a dip switch, one can
select the desired output for the specific application. As
far as supply voltage is concerned, the unit automatically
configures for AC or DC and no field selection is
necessary. Another feature is that the output is fully
protected from short circuit to ground, or if the supply
voltage is applied by mistake to the output. Past experience demonstrates that field related wiring
problems do occur. Instead of denying this fact, the
protections circuit is designed in to ensure trouble-free
start-up. The VDC output unit is also designed to handle
low impedance circuits. In fact, the unit can drive up to
1K ohms minimum. In this way, multiple controllers,
indicators, or other devices can be paralleled to the
output without performance degradation.
The mA output units can function over a wide
unregulated supply voltage range: 12-40 VDC without
any effect on calibration or performance. The unit has
reverse polarity protection built in. As a result, it is next
to impossible to damage the unit by mis-wiring. By using
sophisticated low drop-out voltage regulators and
CMOS integrated circuits, the mA output unit can drive
very high output impedance. In fact, with only 12 VDC
supply, the unit can drive 400 ohms. At 40 VDC, the
unit is capable of handling up to 3000 ohms load. In
this way, the output loop can be tied in series to multiple
controllers, indicators, and other devices without
degrading the performance.
Automated NIST traceable pressure controllers and
precision pressure sensors are utilized to calibrate and
certify the PR-265. Calibration data on each unit is
archived digitally for SPC and QC purposes. All
automated calibration systems are networked and data
is available on-line to numerous individuals at the same
time. In this way, extremely high standards of quality
and calibration integrity are maintained. Each unit is
individually temperature compensated in an
environmental chamber. The temperature compensation
data is also digitized and archived for future reference
purposes. Compensating each unit individually ensures
that published specifications are adhered to.
The PR-265 incorporates a rugged NEMA 4 (IP-65)
fully gasketed, dust proof and splash proof enclosure.
The enclosure has an external mounting bracket to
facilitate field installation. A 1/2” (.875"/22.25mm dia.)
knock-out for conduit connection is also provided. A
liquid tight cable connector is also supplied if the unit
is not being hard wired. Once installed, the enclosure
maintains its environmental rating and protects the
electronics and the sensing element from condensation,
corrosive contaminants and other environmental
pollutants. The unit also has additional features for ease
of installation including unpluggable terminal block,
easily accessible zero and span trimmers, and
conveniently located dip switches for field selection.
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