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
• Red, top & bottom LED
• Green, top LED
• Green, top & bottom LED
• Amber, center 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
–P
Zero
Span
Zero
V+ V– Out
T
e
s
t
+
–
.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.
ƽ
ƽ
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.