Ashcroft CXLdp Arkusz instalacji i konserwacji

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MODEL CXLdp DIFFERENTIAL

PRESSURE TRANSDUCER

INSTALLATION & MAINTENANCE SHEET

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 pres-

sure 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 overpres-

sure capability of the transducer may cause irre-

versible electrical and/or mechanical damage to

the pressure measuring and containing elements.

3. STATIC ELECTRICAL CHARGES:

Any electrical device may be susceptible to dam-

age 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 CXLdp is a low differential

pressure transducer to be used on clean, dry,

non-corrosive gases. It is available in multiple

accuracy classes. Both unidirectional

(e.g. 0 to +1.0 IW) or bi-directional (e.g. ±2.0 IW)

models are available. A green LED located on the

front of the transducer indicates power and

operational status. The LED light intensity increases

as pressure increases.

SPECIFICATIONS

Accuracy: (4) options,specified at time of order.

• ±1.0% of Span

(±0.16 mA for 4-20 mA output units)

(±0.1V for 0-10 Vdc output units)

• ±0.8% of Span

- (±0.128 mA for 4-20 mA output units)

- (±0.08V for 0-10 Vdc output units)

• ±0.4% of Span

- (±0.064 mA for 4-20 mA units)

- (±0.04V for 0-10 Vdc output units)

• ±0.25% of Span

- (±0.04 mA for 4-20 mA units)

(±0.025V for 0-10 Vdc output units)

Output Signal: Specified at time of order.

• 4-20 mA (For symmetric bidirectional ranges 0IW

= 12 mA

• 0-10 Vdc; 0-5 Vdc User selectable option

(For symmetric bidirectional ranges 0IW = 5 or

2.5 Vdc respectively).

Supply Voltage:

• 4-20 mA: 12-36 Vdc (no regulation required)

(see Figure 1)

• 0-10 Vdc: 14-36 Vdc or 24 Vac (± 20%) or 0-5

Vdc (user selectable options): 11.5-36 Vdc or

24 Vac (±20%)

• Supply Current: 6 mA for 10 Vdc output

(4.5 mA for 5 Vdc output option)

Figure 1

Load Limitations 4-20 mA Output

Loop Resistance (Ω)

TING

V min = 12V+ [.022A*(R L )]

*includes a 10% safety factor

R L = R S + R W

R L = Loop Resistance (ohms)

R S = Sense Resistance (ohms)

R W = Wire Resistance (ohms)

Loop Supply Voltage (Vdc)

* F.S. pressure is equivalnt to the span of the transducer (16 mA).

Reverse Wiring Protected

Electrical Connection: Euro-style terminal block

accepts 12-26 AWG

Operating Temperature: 0-160 °F (-18-71 °C)

Enclosure:

NEMA 1 Fire-retardant ABS Meets UL 94-5VA

Weight: Approx. 2.5 oz.

Pressure Connection Options:

⁄

˝ Brass Barbs or

Figure 2

⁄

NPT Female Brass

Optional:

⁄

˝ conduit

or plenum mount-

ing bracket and

cover available as

separately ordered

kit – part number

101A213-01.

(see Figure 2)

INSTALLATION

Mounting:

The transducer

Figure 3

can be mounted

on a 35 mm DIN

Use

#10

rail or with #8 or

screw

#10 screws using

the 4 mounting

holes provided.

Torque limits on

the mounting

holes provided is

6 inch-pounds.

Zero Pot

(see Figure 3)

Electrical Wiring:

1. The use of shielded cable is recommended for

optimum performance. Connect the shield to the

guard terminal on the reading instrument (meter,

etc.) if available or to ground.

2. Remove the terminal block on the front of the

transducer .

3. Available electrical versions are:

a.) CURRENT 4-20 mA; black terminal block.

b.) VOLTAGE 0-5 Vdc/0-10 Vdc; green terminal

block.

Follow the terminal block label markings on the

CXLdp to identify the terminals;

• 4-20 mA Ouput: The left, negative (-), and

right, positive (+) terminals are used, ignore

the center terminal which is not used. Connect

the power supply positive lead to the CXLdp

ZERO

Zero adjust

potentiometer

positive terminal, connect the negative power

supply lead to the negative terminal of the BCS

4-20 mA input. Last, connect the (-) negative

terminal on the CXLdp to the (+) positive BCS

input.

ZERO

Zero adjust

potentiometer

–

Common (V

)

POWER SUPPLY

• 0-10 Vdc; 0-5 Vdc Output: Follow label mark-

ings for terminal assignments; COM is for

Common (supply and output negative), V

is for supply positive and V

nal. The CXLdp Voltage Output unit is supplied

as standard with 0-10 V output, to convert to

0-5 V output see following instructions.

- 0-10 Vdc Output: Product is supplied as

standard with 0-10 V output, see instruction

Use #8

screw

below to access the Voltage Output jumper.

- 0-5 Vdc Output: See below for proper jumper

selection. To convert the unit from a 0-10 V

output to a 0-5 V output unit note the follow-

ing. Access the jumper by simultaneously

pushing both housing tabs away from the

housing, see drawings under "General

Green LED

Dimensions" for details. Change jumper

(orange or red)

into position as

shown below,

carefully reattach

housing cover.

When finished

mark check box

1.500˝

on front label

indicating that the

unit now provides

a 0 – 5 Vdc output.

4. Firmly reinstall the ter-

minal block plug to its

mating connector.

SPAN

–

Span adjust

potentiometer

POWER

–

SUPPLY

BCS

SPAN

Span adjust

potentiometer

Out

Vin (V+, Supply)

is for output sig-

OUT

1.250˝

Figure 4

Jumper

(orange

or red)

0-10 Vdc

0-5 Vdc

Label Part No. 238A713-01