Siemens EF 725 Series Manual do Utilizador descarregar pdf (Página 5)

Optional indicators accuracy

• integral display (microprocessor driven) : no error

• analog output meter : ± 2% full scale deflection

• LCD output meter : ± 0.1% of calibrated span ± 1 unit

• CoMeter

-digital : ± 0.10% of max span(16 mA) ± 1 digit

-analog (bargraph) : 10%

Operating influences

Temperature effects

total effect per 20 K (36°F) ambient temperature change on

transmitter sensor between the limits of - 20°C to + 65°C (-4 to

+150°F) and per 20 K (36°F) process temperature change on

seals diaphragm between the process operating temperature

limits

• sensor A with 3in/DN80 seals : 0.01 kPa, 0.1 mbar, 0.04inH2O

• sensor B with 2in/DN50 seals : 0.03 kPa, 0.3 mbar, 0.12 inH2O

• sensor B with 3in/DN80 seals : 0.02 kPa, 0.2 mbar, 0.08 inH2O

Optional LCD output meter ambient temperature

per 1 K (1.8°F) change between the limits of -20 and +80°C

(-4 and + 176°F)

Total effect : ± (0.0002 x span units + 0.1) of reading.

Optional CoMeter ambient temperature

Total reading error per 20K (36°F) change between the ambient

limits of -20 and +70°C (-4 and +158°F) :

± 0.15% of max span (16 mA).

Static pressure (zero errors can be calibrated out at line

pressure)

per 1 MPa, 10 bar or 145 psi

• sensor code A

- zero error : ± 0.15% of URL

- span error : ± 0.15% of reading

• sensor code B

- zero error : ± 0.08% of URL

- span error : ± 0.08% of reading

Multiply by 1.5 the errors for sensor/seal combinations marked (•)

Supply voltage

Within voltage/load specified limits the total effect is less than

0.005% of URL per volt.

Load

Within load/voltage specified limits the total effect is negligible.

Radio frequency interference

Total effect : less than 0.10% of span from 20 to 1000 MHz and

for field strengths up to 30 V/m when tested with shielded

conduit and grounding, with or without meter. Meets IEC 801.

Common mode interference

No effect from 100 V rms @ 50 Hz, or 50 Vdc.

Series mode interference

No effect from 1 V rms @ 50 Hz.

PHYSICAL SPECIFICATIONS

(Refer to ordering information sheets for variant availability

related to specific model or versions code)

Materials

Process seal isolating diaphragms (*)

AISI 316 L ss, Hastelloy C276 ◊;

Fill fluids

Silicone oil (DC200) or inert fill (perfluorinated polyethers -

Galden ◊)

Mounting flanges

Carbon steel ; AISI 316 ss

Sensor housing : AISI 316 L ss

Bolts and nuts

- Plated carbon steel bolts class 8.8 per UNI 5737 (ISO 4014)

and nuts class 6.S per UNI 3740/4 (ISO 898/2).

- AISI 316 ss bolts and nuts Class A4-50 per UNI 7323 (ISO

3506), in compliance with NACE MR0175 Class II.

Electronic housing and covers

Barrel version

- Low-copper content aluminium alloy with baked epoxy finish;

- AISI 316 L ss.

DIN version

- Low-copper content aluminium alloy with baked epoxy finish

Covers O-ring: Buna N.

Local zero and span adjustments:

Glass filled polycarbonate plastic (removable)

Tagging

AISI 316 ss data plate attached to the electronics housing.

Calibration

- Standard: at maximum span, zero based range, ambient

temperature and pressure

- Optional: at specified range and ambient conditions; or at

operating temperature.

Optional extras

Output indicator:

plug-in rotatable type, LCD or analog.

Standard LCD output meter scale is 0 to 100% linear; special

linear scale to specified range and engineering unit is

available.Standard analog output meter scale is 0 to 100%

linear; special graduation is available.

Supplemental customer tag

AISI 316 ss tag screwed/fastened to the transmitter for

customer's tag data up to a maximum of 20 characters and

spaces on one line for tag number and tag name, and up to a

maximum of 3 spaced strings of 10 characters each for

calibration details (lower and upper values plus unit).

Special typing evaluated on request for charges.

Surge protection (not available with Profibus PA and FF output)

Material traceability

1 2 3 4 5 6 7 8 9 10 11 12

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