Siemens SITRANS P Bedienungsanleitung PDF herunterladen (Seite 186)

Model Designations and Specifications UMSITRPDS3-1

November 2010

9-28

TABLE 9-11 Models 7MF4633 and 7MF4812, Specifications

Input

Measured variable Level

Span (infinitely adjustable) Span Max. permissible test pressure

25 to 250 mbar g (0.36 to 3.63 psi g) See Mounting Flange

25 to 600 mbar g (0.36 to 8.7 psi g) See Mounting Flange

53 to 1600 mbar g (0.77 to 23.2 psi g) See Mounting Flange

160 to 5000 mbar g (2.32 to 72.5 psi g) See Mounting Flange

Lower measuring limit

• Measuring cell, silicone oil filling -100% of span or 30 mbar (0.435 psi a), depending on mounting flange

Upper measuring limit 100% of maximum span

Output

Output signal 4 to 20 mA

• Lower limit (infinitely adjustable) 3.55 mA, factory preset to 3.84 mA

• Upper limit (infinitely adjustable) 23 mA, factory preset to 20.5 mA or optionally set to 22.0 mA

Load

• Without HART communication R

≤ (U

– 10.5 V)/0.023 A; R

in Ω, U

: power supply in V

• With Hart communication R

= 230 to 500 Ω (SIMATIC PDM) or

= 230 to 1100 Ω (HART Communicator)

Accuracy

To EN 60770-1

Reference Conditions Increasing characteristic, start of scale value 0 bar, stainless steel seal diaphragm,

silicon oil filling, temperature 25°C (77°F) r: span ratio (r = max. span/set span)

Error in measurement and fixed-point

setting (including hysteresis and

repeatability)

• Linear characteristic

- r ≤ 10 ≤ 0.15%

- 10 < r ≤ 30 ≤ 0.3%

- 30 < r ≤ 100 ≤ (0.0075 * r + 0.075)%

Long-term drift (temperature change

+/-30°C (+/-54°F))

≤ (0.25 * r)% every 5 years

static pressure max. 70 bar g (1015 psi g)

Influence of ambient temperature

• at -10 to +60°C (14 to +140°F)

- 250 mbar (3.63 psi) measuring cell ≤ (0.5 * r + 0.2)%; 0.4 instead of 0.2 with 10 < r ≤ 30)

- 600 mbar (8.7 psi) measuring cell ≤ (0.3 * r + 0.2)%; 0.4 instead of 0.2 with 10 < r ≤ 30)

- 1600 and 5000 mbar (23.2 and 72.5

psi) measuring cell

≤ (0.25 * r + 0.2)%; 0.4 instead of 0.2 with 10 < r ≤ 30)

• at -40 to -10°C and +60 to +85°C (-40

to +14°F and 140 to +185°F)

- 250 mbar (3.63 psi) measuring cell ≤ (0.25 * r + 0.15)%/10K; double values with 10 < r ≤ 30)

- 600 mbar (8.7 psi) measuring cell ≤ (0.15 * r + 0.15)%/10K; double values with 10 < r ≤ 30)

- 1600 and 5000 mbar (23.2 and 72.5

psi) measuring cell

≤ (0.12 * r + 0.15)%/10K; double values with 10 < r ≤ 30)

Influence of static pressure

• on the zero point

- 250 mbar (3.63 psi) measuring cell ≤ (0.3 * r)% per normal pressure

- 600 mbar (8.7 psi) measuring cell ≤ (0.15 * r)% per normal pressure

- 1600 and 5000 mbar (23.2 and 72.5

psi) measuring cell

≤ (0.1 * r)% per normal pressure

• on the span ≤ (0.1 * r)% per normal pressure

Rated operating conditions

Degree of protection (to EN 60529) IP65

Process temperature

Note: Always take into account assignment of max. permissible working

temperature to max. permissible working pressure of the respective flange

connection!

1 2 ... 181 182 183 184 185 186 187 188 189 190 191 ... 221 222

Kommentare zu diesen Handbüchern

Keine Kommentare

Siemens SITRANS P Bedienungsanleitung Seite 186

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Messen, Testen & Steuern Siemens SITRANS P