Ashcroft DXLdp - Differential Pressure Transmitter User Manual

Warning! read before installation

Media:

The DXLdp is designed to measure clean, dry

non-corrosive gases. (Consult with factory for

use on other media). Not for use on liquids.

Mounting:

The unit can mount to three types of Din sizes

including EN50022, EN50035 & EN50045 (not

included). When securing to EN50022 rail first

hook the top portion of the rear clip onto the top

of the rail and push gently into place. To remove

simply place finger behind lower rear lever and

pull forward. To remove from the EN50035 rail,

grasp the unit, push up and rotate the bottom out.

For the EN50045, pull down and rotate the bottom

out.

Multiple units can be stacked accross the rail.

Internal circuitry is vented through the bottom of

each unit. Tag holes are fabricated into the lower

rear lever and the housing below the terminal

strip for calibration reference tagging and/or ID

location. Refer to Drawing #1.

Power requirements:

The DXLdp is wired (3 wire) (2 wire) for Voltage

and Current output respectively. Reference

Drawing #2.

Voltage Output

The DXLdp will operate on any supply voltage

from 12-36Vdc drawing less than 10mA in full

function LED variations (24Vdc typical).

Current Output

The voltage required for a 4-20mA output is

dependent on the loop resistance of the circuit.

Refer to Drawing #3 showing the minimum sup-

ply voltage (Vmin) required for a given Loop

Resistance (RL).

OPTIONS

The three options available include LED (XDL),

SpoolCal™ (XPV) and 2:1 Turn down (X21).

OPTION: LED RANGE INDICATION (XDL)

Provides a quick visual in/out of range status or

diagnostic indication. Not to be used for calibration

reference. This feature includes front access test

jacks for uninterrupted signal reference.

MODEL DXLdp DIFFERENTIAL
PRESSURE TRANSMITTER
OPERATING & INSTRUCTION SHEET

LED Activation:

Unidirectional ranges

Bidirectional ranges

• Red, top & bottom LED

• Green, top LED

• Green, top & bottom LED

• Amber, center LED

© 2011 Ashcroft Inc., 250 East Main Street, Stratford, CT 06614, USA • Tel: 203-378-8281, Fax: 203-385-0402 • email: [email protected], www.ashcroft.com. All specifications subject to change without
notice. All sales subject to standard terms and conditions of sale I&M011-10074 Rev A 5/11

5.29

–P

Zero

Span

Zero

V+ V– Out

–

.89

3.92

3.18

Model: DXLdp

4.96

Span

Zero

V+ V– Out

.89

3.92

3.18

Model: DXLdp

DXLdp dimension with SpoolCal and LED options

DXLdp dimension for basic unit

Standard Mounting Position

Drawing #1

LED INDICATION

Amber

Zero Pressure

Green

In Range Pressure

Red

Out of Range Pressure

TYPICAL ACCURACY

±3% on

nominal zero

Beyond ±3% to

±106% of range

Beyond ±106%

of range

WARNING! READ

BEFORE INSTALLATION

1. GENERAL:

A failure resulting in injury or damage may

be caused by excessive overpressure,

excessive vibration or pressure pulsation,

excessive instrument temperature, corrosion

of the pressure containing parts, or other

misuse. Consult Ashcroft Inc., Stratford,

Connecticut, USA before installing if there are

any questions or concerns.

2. OVERPRESSURE:

Pressure spikes in excess of the rated over-

pressure capability of the transducer may

cause irreversible electrical and/or mechanical

damage to the pressure measuring and con-

taining elements.

3. STATIC ELECTRICAL CHARGES:

Any electrical device may be susceptible 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:

Congratulations on your purchase of the

Ashcroft

Model DXLdp low differential pressure

transmitter. The DXLdp utilizes the same highly

reliable variable capacitance sensor used in tradi-

tional Ashcroft XLdp family of low differential

transmitters. A selection of both unidirectional

and bi-directional pressure ranges are offered,

accuracy’s of 1%, 0.5% and 0.25% and a wide

assortment of output signals. Refer to CT-5 spec-

ification sheet for more information.

The DIN rail-mounting package offers a new and

efficient use of mounting space for enclosure

mount applications. Optional features such as the

SpoolCal™ process valve actuator, LED’s with

front access test sockets and 2:1 turn down pro-

vide added value when validating a process on

line or calibrating the unit. These options are

available through suffixed (X) variations on the

part number. Contact the factory for DXLdp

upgrades.

Front Access Test Jacks:

Provides on-line process reference signal or cali-

bration signal without disconnecting power supply

wiring. Measurements can be made using a stan-

dard multi-meter or data collection instrument.

Contact the factory for more information on the

Ashcroft ATE handheld calibrator. Reference sig-

nals through the test jacks are made in series for

4-20mA output and in parallel for voltage output.

Gold plated contacts accept standard 0.08˝

microtip test leads, snapping in place for secure

measurements.