Xentaur LPDT, Руководство пользователя, Страница: 21 / 54

LPDT User’s Manual
page 14
• Any circuitry which is activated by relay contacts
should account for the contact bounce, one simple
debouncing method is placing a capacitor across the
relay contacts.
• AC power wiring should be routed as far away from the
LPDT and its wiring as practical.
3.2 Instrument Technical Specifications
Enclosure: .........................Stainless Steel, optional weather proof cover is avail-
able.
Dimensions & Weight:......~2”Dia. x ~4.75” long including sensor & connector
(see appendix C) 0.5lbs.
Pressure operating range: ..Standard: .....500 PSI (34 bar).
Optional: .....5,000 PSI (340 bar).
Mechanical connections:...14mm x 1.25mm threads, and ¾”-16 threads.
Electrical connections: ......2.1mm x 5.5mm (12mm minimum barrel length)
power jack, with retainer.
Cable: ................................Two conductor cable, 12’ (~4m) provided.
Power Requirements: ........10 to 33 VDC polarity independent, the instrument
draws 4-20mA depending on measured dewpoint.
Input resolution: ................0.1°C dewpoint.
Indicators: .........................3.5 digit LCD with custom legends.
Engineering units: .............°C,°F, PPM, LBS H
2
O/mm scf,gm H
2
O/M
3
.
Controls:............................3 push buttons, user’s selections are stored in
EEPROM.
Outputs:.............................Analog and digital outputs are available from the
LPDT.
A. 4-20mA drawn by the instrument from the power
supply. The 4-20mA is linear to the selected engi-
neering units, the range is programmable. Output
resolution is 0.1°C dewpoint.
B. The instrument can supply digital output by
modulating the 4-20mA loop line. The timing and
format of the data conforms to RS-232, however to
interface to a PC or other RS-232 device an optional
adapter is required.
In the digital mode the LPDT can be remotely
operated and the dewpoint as well as temperature