Manual Vega Flex 62 sensor ultrassônico, Esquemas de Engenharia Elétrica

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Level

Switching

Pressure

Level measurement

Guided microwave

Product Information

VEGAFLEX 62 – 4 … 20 mA/HART®

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Product description

1 Product description

1.1 Configuration

Scope of delivery The scope of delivery encompasses:

• the VEGAFLEX 62 level sensor
• documentation
  • operating instructions manual
  • Ex-specific safety instructions (with Ex versions) and, if necessary, further certifi- cates.

Components VEGAFLEX consists of the following com- ponents:

• process connection with electrode
• housing with electronics
• housing cover with indicating and adjustment module PLICSCOM (option)

1.2 Principle of operation

Area of application VEGAFLEX 62 is a level senor with cable or rod electrode for continuous level measurement. It is designed for industrial use in all areas of process technology and is suitable for the measurement of liquids and solids.

Physical principle High frequency microwave impulses are guided along a steel cable or rod. The micro- wave impulses are reflected when they reach the product surface. The impulse running time is processed by the integrated electronics and outputted as distance.

Power supply VEGAFLEX has a two-wire electronics 4 … 20 mA/HART ®^ for power supply with 14 … 36 V DC.

1.3 Adjustment

VEGAFLEX can be adjusted with three different media:

• the indicating and adjustment module PLICSCOM
• the adjustment software acc. to FDT/DTM standard, e.g. PACTware TM^ and PC
• a HART ®^ handheld.

Housing with electronics

Housing cover with adjustment module PLICSCOM (option)

Process connection

Fig. 1: Example of a VEGAFLEX 62 in cable version with plastic housing

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Connection to power supply

2 Connection to power supply

2.1 Preparing the connection

Take note of safety instructions for Ex applications In hazardous areas you should take note of the appropriate regulations and type approval certificates of the sen- sors and power supply units. The sen- sors must only be operated on intrinsically safe circuits. The permissible electrical values are stated in the certificate.

Select voltage supply VEGAFLEX requires a supply voltage of 14 … 36 V DC. Power supply and current signal are led via the same two-wire connection cable.

Provide a reliable separation between the exter- nal energy source and the mains circuits acc. to DIN VDE 0106 part 101. The VEGA power supply units VEGATRENN 149AEx, VEGASTAB 690, VEGADIS 371 as well as all VEGAMETs meet this requirement. When using one of these instru- ments, protection class II is ensured for VEGAFLEX 62.

Bear in mind the following factors regarding supply voltage:

• Reduction of the output voltage of the power supply unit under nominal load
• Influence of additional instruments in the cir- cuit (see load values in Technical data).

Anschlusskabel auswählenSelect connec- tion cable VEGAFLEX is connected with standard two-wire cable. An outer diameter of 5 … 9 mm ensures the seal effect of the cable entry.

If strong electromagnetic interference is ex- pected, shielded cable is recommended. The screen should be applied on both ends.

Select connection cable for Ex applications Take note of the corresponding installa- tion regulations for Ex applications.

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Connection to power supply

1 2

PC with PACTwareTM

VEGA- CON- NECT 3

Power supply 14…36 V DC/ 4…20 mA

Plug con- nection

1. (^) Connect cable screen here, connect ground terminal on housing exterior to ground as prescribed (low-impedance). The two terminals are galvanically connected.

4... 20mA Display

1 2 Com.

Contact springs for adjustment module PLICSCOM

Spring-loaded terminal for 4…20 mA con- nection

Ground terminal 1)

Plug connec- tion for VEGACON- NECT 3

Top view, connection compartment

Fig. 7: Connection compartment, double chamber housing

Wiring plan

Fig. 8: Wiring plan, double chamber housing

1 2

4... 20mA

1 2

1. (^) The indicating and adjustment module PLICSCOM can be used with Exd only in the electronics compartment.
2. (^) Connect cable screen here, connect ground terminal on housing exterior to ground as prescribed (low-impedance). The two terminals are galvanically connected.

Power supply 20…36 V DC/ 4…20 mA

Spring-loaded terminals for 4…20 mA con- nection

Screen 2)

Ground terminal

Top view, connection compartment Exd 1)

Fig. 9: Connection compartment, double chamber housing Exd

Wiring plan Exd

Fig. 10: Wiring plan, double chamber housing Exd

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Supplement

Supplement

Technical data

General data

Materials, wetted parts

• rod ø 16 mm 1.4435 (316L)/Hastelloy C22 2.
• cable ø 6 mm with gravity weight 1.
• seal Viton, Kalrez 6375, EPDM and plastic
• process fittings 1.4435 (316L) and PCTFE; Hastelloy C22 2.4602 and PCTFE Materials, non-wetted parts
• housing plastic PBT, Alu-die casting powder-coated, Stainless steel 1.4435 (316L)
• inspection window Polycarbonate (Makrolon)
• ground terminal Stainless steel 1.4435 (316L) Basic weight
• plastic housing 1580 g
• Aluminium housing 1990 g
• Aluminium double chamber housing 2290 g
• stainless steel housing 2350 g
• rod (ø 16 mm) approx. 1660 g/m
• cable (ø 6 mm) approx. 170 g/m
• gravity weight (only with cable version) 730 g

Process conditions

Process pressure -1 … 40 bar (-100 ... 4000 kPa) Process temperature

• Viton -30 … 150°C
• EPDM -40 … 150°C
• Kalrez 6375 -20 … 150°C

Output variable

Output signal 4 … 20 mA/HART ® Resolution 1,6 μA Fault signal 22 mA; 20.5 mA; 3.6 mA (selectable) Current limitation 22 mA Integration time 1)^ 0 … 999 s, adjustable Rise time 6 sec (ti : 0 s, 0 … 63 %)

1. (^) The time required by the output signal to reach 63 % of the actual height after a jump of the input variable.

˚C

(^0) ˚C

40

20

60

80

50 100 150

Ambient temperature

Product temperature

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Supplement

0%

100%

150

500 - 6.000 0%

100%

300

100

150

1.000 - 60.

Fig. 11: Measuring ranges of VEGAFLEX 62

Characteristics

Min. span between full and empty adjustment 10 mm Min. dielectric value εr > 1.

Sensor length

Rod 500 mm … 6 m

• blocked distance top 150 mm
• blocked distance bottom 0 mm Cable 1 m … 60 m
• blocked distance top 300 mm
• blocked distance bottom 250 mm

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Accuracy

Reference conditions acc. to IEC 60770-

• temperature 15 … 25°C
• relative moisture 45 … 75 %
• air pressure 860 … 1060 mbar (86 … 106 kPa) Reference reflector metal plate ø 1 m Installation conditions:
• flange DN 100
• min. distance to obstacles 1 m Temperature drift 0,015 %/10 K relating to the max. meas. range

Reference conditions acc. to IEC 60770-

Power supply

Power supply 14 … 36 V DC

• EEx d ia instrument 20 … 36 V DC
• EEx ia instrument 14 … 30 V DC Permissible residual ripple
• < 100 Hz U (^) ss ≤ 1 V
• 100 Hz … 10 kHz U (^) ss ≤ 10 mV Load see diagram

Electromechanical data

Cable entry and terminals

• single chamber housing M20 x 1.5 (cable-ø 5 … 9 mm)/½ NPT
• double chamber housing M20 x 1.5 (cable-ø 5 … 9 mm)/½ NPT M16 x 1.5 (cable-ø 4 … 8 mm) Spring-loaded terminals for wire cross-section up to 2.5 mm²

5

10

mm

• 10
  • 5 0,30,5^60 m

Meas. error

Meas. distance

Supplement

V

Ω 1100

800

250 0 14 19 22 24 26 28 30 32 34 36

Voltage limit non-Ex sensor

Voltage limit Ex sensor

HART®^ load

Output voltage power supply unit

Line resistance + HART ®^ resistance

Exd

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Supplement

Dimensions

VEGAFLEX 62

SW60 G1 1/2 (^) / 1 1/2 NPT

66,

ø 30

150

6

145

37

1.000 - 60.000 500 - 6.

22

ø 16

26 53

ø 54

ø 30

12

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Supplement

ø 77

~ 69

112 (*123)

M20x1,

ø 84

~ 116

112 (*123)

~ 79 ø 84

112 (*123)

~ 69

112 (*123)

ø 77

½ M2½ N M20x1,5/½ NPT

M20x1,5/½ NPT

M16x1,

Plastic housing Stainless steel Aluminium housing housing

Aluminium double chamber housing

• with display

23,6 34,

Low cover without PLICSCOM

High cover with PLICSCOM

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VEGA Grieshaber KG

Am Hohenstein 113

77761 Schiltach

Germany

Phone +49 7836 50-

Fax +49 7836 50-

E-mail info@de.vega.com

www.vega.com

You will have on our homepage www.vega.com under VEGA online Downloads of the following operating instructions manuals menu schematics software certificates approvals and many of other things.