Ashcroft T2 - High Performance Pressure Transmitter Manuel d'utilisateur télécharger pdf (Page 2)

3. STATIC ELECTRICAL CHARGES:

Any electrical device may be susceptible to damage

when exposed to static electrical charges. To avoid

damage to the transducer observe the following:

• Ground the body of the transducer BEFORE mak-

ing any electrical connections.

• When disconnecting, remove the ground LAST!

Note: The shield and drain wire in the cable (if sup-

plied) is not connected to the transducer body, and is

not a suitable ground.

DESCRIPTION

The Ashcroft Model G2 and T2 pressure transducers

are high performance instruments intended for use in

industrial applications where the process media is com-

patible with the 17-4PH stainless steel sensor material

and the 304 SS process connection.

MECHANICAL INSTALLATION

Environmental

The G2 and T2 transducers can be stored and used

within the temperature limits of –40°C to 125°C (-40°F

to 257°F). Ingress protection ratings of the units are de-

pendent on the electrical termination specified. Refer to

the wiring diagrams on the reverse for the IP rating of

the unit which is being installed.

Mounting

The G2 and T2 transducers require no special mount-

ing hardware and can be mounted in any orientation

with negligible position error. Although the units can

withstand considerable vibration without damage or

significant output effects, it is always good practice to

mount the transducer where there is minimum vibra-

tion. For units with NPT type pressure fittings apply

sealing tape or an equivalent sealant to the threads

before installing. When instal-ling or removing the unit

apply a wrench to the hex wrench flats, located above

the pressure fitting.

DO NOT tighten by using a pipe wrench on the hous-

ing. A 27mm (1

⁄16˝) wrench can be used on the wrench

flats of the hex. For G2 models with detachable electri-

cal connectors a 6 point deep socket can also be used

to install the unit.

lectro-Magnetic Interference

The circuitry of the G2 and T2 transducers is designed

to minimize the effect of electromagnetic and radio fre-

quency interference. To minimize susceptibility to noise,

avoid running the termination wiring in a conduit which

contains high current AC power cables. Where possible

avoid running the termination wiring near inductive

equipment.

Field Adjustments

The G2 and T2 transducers are precisely calibrated

and temperature compensated at the factory to ensure

long and stable performance. There are no field acces-

sible adjustments on the G2 or T2 transducers.

ELECTRICAL INSTALLATION

Please refer to the reverse of this page for power sup-

ply requirements and for appropriate wiring protocol

based on the particular output signal and electrical

terminal.

Power Supply Requirements:

Output Signal Min Supply Max Supply

Ratiometric* 4.5Vdc 5.5Vdc

(0.5V to 4.5V)

0-5Vdc 9Vdc 36Vdc

1-5Vdc 9Vdc 36Vdc

1-6Vdc 9Vdc 36Vdc

0-10V 14Vdc 36Vdc

0.5-4.5Vdc 9Vdc 36Vdc

4-20mA** 9Vdc 36Vdc

*0.5Vdc-4.5Vdc output is ratiometric to the

nominal 5Vdc supply

**For transmitters with 4-20mA output signal,

the minimum voltage at the terminals is

9Vdc. However, the minimum supply voltage

should be calculated using the adjacent

graph and formula.

To determine minimum loop supply voltage:

LSV(min)=9(V)+[.022(A)*R

]

Where:

LSV= Loop Supply Voltage (Vdc)

= R

+ R

(ohms)

= Loop Resistance (ohms)

= Sense Resistance (ohms) [Measuring Instrument]

= Wiring Resistance (ohms)

9 (min)

36 (max)

Loop Supply Voltage (Vdc) [LSV]

(4-20mA ONLY)

Loop Resistance (R

-Ohms)

1400

1200

Power Supply Voltage vs Loop Resistance

G2 & T2 ELECTRICAL INSTALLATION

G2 & T2 ELECTRICAL INSTALLATION (cont.)

Wiring Diagrams (see following pages for further detail)

2 ELECTRICAL TERMINATIONS AND WIRING

3-PIN DELPHI (PACKARD)

METRI-PACK 150 SERIES

Mates to Optional Metri-Pack connector 12065287

in Voltage 4-20mA Mating

o. Output Output* Cable Color

Common V

– B

lack

B V + V + Red

Output V

– W

hite

IP67 Ingress rating

HIRSCHMANN G SERIES

Mates to Optional Hirschmann G4W1F connector, or equal

Pin Voltage 4-20mA Mating

No. Output Output* Cable Color

1 V + V + Red

2 Common V – Black

3 Output V – White

4 Case Gnd. Case Gnd. Green

IP67 Ingress rating

AMP SUPERSEAL

Pin Voltage 4-20mA Mating

No. Output Output* Cable Color

1 Common V – Black

2 Output V – White

3 V + V + Red

2 3 4 5

Use either V- termination on G2 with 4-20mA output

* Use either V- termination on G2 with 4-20mA output

1 2

Commentaires sur ces manuels

Pas de commentaire

Ashcroft T2 - High Performance Pressure Transmitter Manuel d'utilisateur Page 2

Commentaires sur ces manuels

Produits connexes et manuels pour Instruments de mesure Ashcroft T2 - High Performance Pressure Transmitter