Ashcroft RXLdp Operating instructions

Brand: Ashcroft

Model: RXLdp

Type: Operating instructions

Ashcroft RXLdp is a low differential pressure transducer designed for measuring clean, dry air and other noncorrosive gases. It offers both unidirectional and bidirectional pressure ranges and various output signals. With a wide operating temperature range of 0 to 160°F, it is suitable for various applications. Its rugged construction and ability to withstand overpressure up to 15 psi make it reliable for demanding environments. The easy mounting options and simple electrical connections ensure hassle-free installation.

MODEL RXLdp

INSTRUCTION SHEET

1. 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.

2. 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.

3. 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.

WARNING! READ

BEFORE INSTALLATION

m m

All sales subject to standard terms and conditions of sale. I&M 011-10071 (250-3117). Rev. B 11/11

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).

B. Current Output

Electrical Connections

1. With pressure connection options

(With Case)

F01 1⁄ 8 NPT female

MB2 1⁄ 4 barbed

MB8 1⁄ 8 barbed

A. Voltage Output

+POWER

SUPPLY

–

POWER

SUPPLY

OUT

–

Load Limitations 4-20mA

OPERATING

REGION

LOOP SUPPLY VOLTAGE (VDC)

010 12 20 30 36 40

1250

1045

1000

750

500

250

LOOP RESISTANCE (OHMS)

Vmin = 12 + (.022A x RL)

RL = RS+ RW

RL = Loop Resistance (ohms)

RS = Sense Resistance (ohms)

MODEL RXLdp

INSTRUCTION SHEET

All sales subject to standard terms and conditions of sale. I&M 011-10071 (250-3117). Rev. B 11/11

➤

2.8

3.7

➤

1.6

➤

0.9

➤

3.8 ➤

➤

0.6

0.4

2.8

➤

1.1

➤

1.7

➤

Ø 0.14

➤

0.6

➤

2.2

3.3

➤

2.3

Ø 0.20

➤

1.1

General Dimensions (IN INCHES)

B. Current Output

A. Voltage Output

Electrical Connections

2. With pressure connection option MB1

(No Case)

Ashcroft RXLdp Operating instructions

Ashcroft RXLdp Operating instructions

Ashcroft RXLdp Operating instructions

Related papers

Other documents