7

Œ

Specifications will degrade with Model 7xB, 7xD, and 7xP probes and/or Fixed threshold configuration.



Top 24 inches of Model 7xB probe: 1.2 inches (30 mm).

Reference Conditions with a

72" coaxial type GWR probe

Œ

Reflection from liquid, with dielectric in center of

selected range, at 70 °F (+20 °C) with CFD threshold

Linearity



Coaxial/twin

lead probes

< 0.1 % of probe length or 0.1" (2.5 mm),

whichever is greater

Single lead

probes

< 0.3 % of probe length or 0.3" (8 mm),

whichever is greater

Accuracy



Coaxial/twin

lead probes

< 0.1 % of probe length or 0.1" (2.5 mm),

whichever is greater

Single lead

probes

± 0.5 % of probe length or 0.5" (13 mm),

whichever is greater

7xT/7xL interface

± 1" (25 mm)

Resolution

± 0.1" (2.5 mm)

Repeatability

< 0.1" (2.5 mm)

Hysteresis

< 0.1" (2.5 mm)

Response Time

< 1 second

Warm-up Time

< 5 seconds

Ambient Temp.

-40° to +175° F (-40° to +80° C): blind transmitter

-5° to +160° F (-20° to +70° C): with digital display

-40° to +160° F (-40° to +70° C):

for EEx ia and EEx d[ia] with blind transmitter

-5° to +160° F (-20° to +70° C):

for EEx ia and EEx d[ia] with digital display

Process Dielectric Effect

< 0.3" (7.5 mm) within selected range

Operating Temp. Effect

Approx. +0.02 % of probe length/°C for probes

≥ 8' (2.5 m)

Humidity

0-99 %, non-condensing

Electromagnetic Compatibility

Meets CE requirements (EN-61326: 1997+A1+A2) and NAMUR NE 21

(Single and Twin Rod probe must be used in metallic vessel or stillwell)

Surge Protection

Meets CE EN61326 (1000 V)

T R A N S M I T T E R

S P E C I F I C A T I O N S

P E R F O R M A N C E

P R O B E

S P E C I F I C A T I O N S

Description

7xD / 7xL: High Pressure / High Temperature

GWR Probe

7xS: Saturated Steam GWR Probe

Materials

Probe

Process seal

Borosilicate/Inconel X750

High Temp PEEK with Aegis PF 128

Spacers

High Temp PEEK

Probe diameter

Standard coax

Inner rod 0.31" (8 mm) – outer tube 0.87" (22.5 mm)

Enlarged coax

Stainless steel:

Inner rod 0.63" (16 mm)

Outer tube 1.75" (45 mm)

Hastelloy C and Monel: Inner rod 0.63" (16 mm)

Outer tube 1.92" (49 mm)

n/a

Process Connection

Flanged: Various ANSI, DIN or “proprietary” mating flanges

Probe length

From 24 to 240 inches (60 to 610 cm)

Œ

From 24 to 180 inches (60 to 450 cm)

Transition Zone



Top

None

8" (200 mm)

Ž

Bottom

ε

r: 1.4 = 6" (150 mm) /

ε

r: 80 = 1" (25 mm)

ε

r

≥ 10 = 1" (25 mm)

Max. Process

Temp.

Max

+800° F @ 1500 psi (+430° C @ 103 bar)

+650° F @ 4700 psi (+345° C @ 324 bar) for

7xx-V, N, P and R

+400° F @ 5700 psi (+200° C @ 393 bar) for 7xx-W

+650° F @ 2250 psi (+345° C @ 155 bar)

Min

-320° F @ 2000 psi (-196 °C @ 135 bar)

0° F @ 3000 psi (-15° C @ 205 bar)

Max. Process Pressure



6250 psi @ +70° F (430 bar @ +20° C)

2250 psi @ +650° F (155 bar @ +345° C)

Max. Viscosity

500 cP (standard) / 1500 cP (enlarged)

500 cP

Dielectric Range

ε

r

≥ 1.4-100: 7xx-W, V, N, P and R

ε

r

≥ 2,0-100: 7xx-A, B and C

10 to 100

Vacuum service

Full vacuum

Negative pressure but not hermetic seal

1200

1000

800

600

400

200

0

0

10

20

30

40

VDC

GENERAL PURPOSE (GP)

INTRINSICALLY SAFE (IS)

EXPLOSION PROOF (XP)

20.5 mA

24 VDC

630

11

Ω

Œ

Consult factory for insertion length < 24" (60 cm).



Transition Zone (zone with reduced accuracy) is dielectric dependent;

ε

r = dielectric permitivity. It is recommended to set 4–20 mA signal outside transition zones.

Ž

Consult factory for overfill applications.



See tables on page 9.