Omega Products LV801 User Manual

176.3 (6.94)

36.6

(1.44)

127.0 (5.0)

228.6 (9.0)

101.6 (4.0)

19.0 (0.75)

25.4 (1.0)

141.2 (5.56)

2.0 (

⁄4) NPT

(w/1

⁄4 NPT)

2.0 (M20 x 1.5 (w/1

⁄2 BSPT)

⁄4 NPT

DRIVEN SHIELD

PROBE

RF capacitance point LeveL SenSoRS

LV800 Series

driven shield is activated with the

U Superior 0.5 pF

Sensitivity Ensures Reliability

U Build-Up Immunity Helps

Eliminate False Signals

U High Intensity LED

Indicating Light (Ordinary Location Integral Sensors Only)

U Simple 2-Step Manual

Calibration

LV800 Series RF capacitance sensors offer cost-effective point level monitoring with reliability you can count on. Omega

provides you with the most affordable solution for your application. Omega’s RF capacitance probes are designed to provide a high level of sensitivity, stability and durability for powder and bulk solids applications, as well as liquid and slurry applications.

Principal of Operation

A radio frequency is applied to the probe and is continually analyzed to determine the inﬂuence caused by the surrounding environment. As material contacts the probe, the radio frequency shifts indicating an increase in capacitance (C). The active probe of the unit and the vessel’s wall make up the 2 plates, (A) of a capacitor which are separated by a ﬁxed distance (D). The probe’s insulator and surrounding air provide the dielectric material [with dielectric constant (K)]. As the air (K=1.0) is displaced with any other material (K > 1.0), the capacitance effect (C) is enhanced, thereby changing the application’s impedance. This inﬂuence is measured within the circuitry and compared to a reference established by the sensitivity setting. The setting determines how much inﬂuence must be present before the output changes. The driven shield section enables the circuitry to ignore product build-up on the probe that would otherwise cause false sensing. The

of the probe

same radio frequency potential as the sensing probe. Since current can not ﬂow between identical potentials, the driven shield blocks current ﬂow from the active probe to the vessel wall through the material build-up, thereby eliminating the sensing of the material build-up.

176.3 (6.94)

19.0 (0.75)

25.4 (1.0)

406.4 (16.0)

141.2 (5.56)

⁄4) NPT

2.0 (

⁄4 NPT)

(w/1 OR

36.6

(1.44)

82.6

(3.25)

279.4 (11.0)

2.0 (M20 x 1.5

(w/1

⁄2 BSPT)

⁄4 NPT

DRIVEN SHIELD

PROBE

3.0 (0.12) HOLE (FOR EXT)

LV801 Dimensions: mm (inch)

LV802 Dimensions: mm (inch)

SENSITIVITY SETTING OF THE LV800

SENSITIVITY

DESCRIPTION

HIGH

MED

LOW

NO. OF

ADJ. TURNS

0 to 1

1 to 3

> 3.0

MATERIAL

DIELECTRICS

1.5 to 3.0

3.0 to 9.0

> 9.0

K-41

LV801, shown smaller than actual size.

TYPICAL

APPLICATIONS

PLASTICS, SOAP, OILS RUBBER, CEMENT

GRAINS, FERTILIZERS, FEED, SALT

WASTEWATER, SLURRIES ANY WATER BASED SOLUTIONS

Applications

LV800 Series capacitance point level sensors are versatile devices providing high and low level readings in bins, silos, tanks, hoppers, and other vessels. LV800 Series superior sensitivity range allows users to properly adjust units to meet the needs of a wide variety of applications. Whether your application is for a powder, liquid, granular solid, or viscous material, the LV800

Typical Applications include, but not limited to

Chemicals Plastics Pellets Feed/Grain Rubber Pharmaceuticals Liquids Wastewater Sand Food Ingredients Slurries Cement Powders Paint and Coatings Coal Granular Solids Oils Paper Pulp

Series product line offers the right solution.

Speciﬁcations for LV800 Series

Power 115 Vac (±15%), 2.5 VA, 50/60 Hz, 230 Vac (±15%), 2.5 VA, 50/60 Hz Altitude 2000 m (6562') max Installation Category II Pollution Degree 4 (reduced to 2 by enclosure) suitable for indoor/outdoor use Ambient Operating Temperature -40°C (-40°F) to 65°C (150°F) Internal Bin Temperature* To 80°C (176°F ) with aluminum mount [<40°C (104°F) ambient]

To 204°C (400°F) with stainless steel mount [<50°C (122°F) ambient]

Output Relay SPDT, 5A @ 250 Vac, 30 Vdc maximum External Indicators Red and green LEDs indicating power and operating mode (ordinary location units only) Sensitivity Multi-turn potentiometer adjustment 0.5 pf to 150 pf Stability ±0.027 pf per °C (±0.015 pf per °F) @ 0.5 pf setting Time Delay 0.25 to 15 sec delay-to-activate, adjustable 0.25 sec delay-to-deactivate, ﬁxed Fail-Safe Switch selectable - HI/LO Build-Up Immunity Protected via driven shield to 150 Ω load Enclosure Cast aluminum screw-on cover, beige polyester powder coat, NEMA 4 (IP66) Conduit Connection Two (2) ³⁄₄ NPT connections Approvals CSA(US) CSA(C) ordinary locations, CE mark (ordinary location only)

* Inﬂuenced by mounting, material thermal conductivity and ambient temperature.

Probe Speciﬁcations

Standard/Food Grade Probe

Mounting 1¹⁄₄ NPT aluminum Probe Material 9.5 mm (³⁄₈") dia. 316 SS probe and guard, PPS and nylon insulators Probe Length 406 mm (16") from aluminum mounting Temperature (Probe Only) PPS: 232°C (450°F) max, nylon: 148°C (300°F) max Pressure 3.5 bar (50 psi) max (aluminum connection), 10 bar (150 psi) max (³⁄₄ NPT SS)

Stub Probe

Mounting 1¹⁄₄ NPT aluminum Probe Material 9.5 mm (³⁄₈") dia. 316 SS probe and guard, PPS Probe Length 228.6 mm (9") Temperature (Probe Only) PPS 232°C (450°F) max Pressure 3.5 bar (50 psi) max (aluminum connection)

To Order Visit omega.com/lv800 for Pricing and Details

Model No. Probe Type Power Probe Connection

LV801 40 cm (16") PPS 115 Vac 1¹⁄₄ NPT Al LV802 23 cm (9") PPS 115 Vac 1¹⁄₄ NPT Al LV803 40 cm (16") PPS 230 Vac 1¹⁄₄ NPT Al LV804 40 cm (16") food grade nylon 115 Vac 1¹⁄₄ NPT Al LV805 40 cm (16") PPS 115 Vac 1¹⁄₄ and ³⁄₄ NPT stainless steel

Comes complete with operator’s manual.

Ordering Examples: LV801, 40 cm (16") PPS probe, 115 Vac, 1 LV804, 40 cm (16") food grade nylon probe, 115 Vac, 1

⁄4 NPT Al connection.

K-42