ASHCROFT RXLdp Differential Pressure Transmitter Instructions
- June 3, 2024
- ASHCROFT
Table of Contents
ASHCROFT RXLdp Differential Pressure Transmitter
WARNING! READ BEFORE INSTALLATION
GENERAL
A failure resulting in injury or damage may be caused by excessive overpres- sure, excessive vibration or pressure pulsation, excessive instrument temper- ature, corrosion of the pressure con-taining parts, or other misuse. Consult Ashcroft Inc., Stratford, Connecticut, USA before installing if there are any questions or concerns.
OVER PRESSURE
Pressure spikes in excess of the rated overpressure capability of the transducer may cause irreversible electrical and/ or mechanical damage to the pressure measuring and containing elements.
STATIC ELECTRICAL CHARGES
Any electrical device may be suscep-tible to damage when exposed to static electrical charges. To avoid damage to the transducer the operator/installer should follow proper ESD (electrostatic discharge) protection procedures before handling the pressure transducer.
Description
The Ashcroft Model RXLdp is a low differential pressure transducer to be used
with clean, dry air and other noncorrosive gases. Both unidirectional (e.g.,
0/1.0 in. W.C.) and bidirectional (e.g., ±3.0 in. W.C.) pressure ranges are
offered, as well as a wide selection of output signals. The storage tempera-
ture limits of the RXLdp are from –40 to 180°F. The unit operates between 0
and 160°F and is temperature compen-sated between 40 and 125°F.
Mounting
The unit should be mounted with #6 or #8 screws using the two mounting holes
provided. Easy access to the zero adjustment may be a consideration when
mounting. The transducer can be mounted in any orientation with virtually no
effect on calibration. Any minor zero pressure offsets that are encountered
can be adjusted using the zero adjust potentiometer.
Piping
The two pressure connections are pro-tected with tubing to avoid debris enter-
ing the unit. It should be left in place until system tubing is to be
connected. The Ashcroft Model RXLdp can withstand overpressure or vacuum up to
15 psi without requiring a recalibration.
Recommended flexible tube sizes should be as follows:
1/4 barb: < 3⁄16˝ ID tube
1/8 barb: < 1⁄16˝ ID tube
Power Requirements
Voltage Output:
The Model RXLdp will operate on any unregulated supply voltage from 12-36 Vdc
(24 Vdc typical) and will draw less than 5mA.
Current Output:
The voltage required for 4-20mA output is dependent on the loop resistance of
the circuit. The figure below shows the minimum supply voltage (Vmin) required
for a given Loop Resistance (RL).
Electrical Connections
With pressure connection options (With Case)
- F01 1⁄ 8 NPT female
- MB2 1⁄ 4 barbed
- MB8 1⁄ 8 barbed
MODEL RXLdp INSTRUCTION SHEET
Electrical Connections
With pressure connection option MB1 (No Case)
General Dimensions (IN INCHES)
© 2011 Ashcroft Inc., 250 East Main Street, Stratford, CT 06614-5145, USA, Tel: 203-378-8281, Fax: 203-385-0499, www.ashcroft.com
All sales subject to standard terms and conditions of sale. I&M 011-10071 (250-3117). Rev. B 11/11