Manual

ManualsBrandsSOR ManualsSensorsSingle Point RF Level Switch

Form 830 (03.13) ©SOR Inc.

1/12

The 651 RF Admittance Single Point Level Switch is a level control which

uses dielectric constant and conductivity to detect the level of liquids,

slurries, granulars, and solids. When used with any of the RF Probes,

it will provide accurate switching for level processes.

The control features a fail-safe switch which reverses the operation of

the relay. An LED inside the housing lights when the process is touching

the probe. A sensitivity adjustment inside the control allows the user to

increase or decrease sensitivity as needed. Optional time delay feature

will delay switching on or off from 0 to 60 seconds.

651 RF Admittance

Single Point Level Switch

General Instructions

Registered Quality System to ISO 9001

Design and

specifications are

subject to change

without notice.

For latest revision, go to

www.sorinc.com

NOTE: If you suspect that a product is defective, contact the factory or the

SOR

Representative in your area for a return authorization number (RMA).

This product should only be installed by trained and competent personnel.

Table of Contents

Pre-Installation I/O Test and Calibration ....1

Installation ....................................... 3

Electrical Connections .........................4

RF Probe Grounding Scheme .................5

Fail-Safe Mode ..................................6

Circuit Board Replacement ....................7

Sensor Replacement ...........................7

Control Drawings ............................ 8-9

Troubleshooting ............................... 10

Dimensions ................................ 11-12

Pre-Installation I/O Test and Calibration



Remove instrument from shipping box and visually inspect for obvious

physical damage. Report any shipping damage to the carrier. Report

any internal discrepancies to the factory representative in your area.

Record the serial number from the nameplate should conversation

with the factory be necessary.



Remove housing cover.



Place instrument on an insulated surface or support so sensor does not touch a

conductive surface.



Ensure area is safe and observe normal precautions for exposed and powered PC board.



Apply proper line power per page 4, and observe LED. (See

)

Summary of content (12 pages)

PAGE 1
651 RF Admittance Single Point Level Switch General Instructions The 651 RF Admittance Single Point Level Switch is a level control whichh uses dielectric constant and conductivity to detect the level of liquids, slurries, granulars, and solids. When used with any of the RF Probes, it will provide accurate switching for level processes. The control features a fail-safe switch which reverses the operation of the relay. An LED inside the housing lights when the process is touchingg the probe.
PAGE 2
Screw Clamp Terminal Block Sensitivity Adjustment Timer Module (optional) LED K1 Output Relay Line Fuses Top View JP1 Fail Safe Selector Switch Banana Plug to Sensor Jack Equipment Case Ground Connector  Turn sensitivity adjustment clockwise (25 turns) to increase sensitivity until the LED illuminates indicating that the relay is energized. The unit is normally shipped in the most sensitive position.
PAGE 3
Time Delay: The Series 650 has a built-in 0.5 second delay to energize the output relay. An adjustable delayy feature , Timer is optional. (See Module.) Oil Water 0.5 delay ON up to 60 seconds OFF 0.5 delay OFF up to 60 seconds ON The optional time delay is a 12-turn pot; full CCW is 0.5 sec, full CW is 60 sec. When the timer board is unplugged, delay is 0.5 sec. This option may be used to increase the dead band at set point, compensate for wave effects or turbulence and free fall time in solids.
PAGE 4
Electrical Connections Electrical power must be disconnected from explosion-proof models before the cover is removed. Failure to do so could result in severe personal injury or substantial property damage.
PAGE 5
120 VAC (651K7)  Remove cover.  Observe all applicable electrical codes and recognized wiring practices.  Remove two #4 mounting screws and slide out PC board to expose green ground screw (Internal Primary Equipment Ground/Earth) in base of housing.  Connect ground wire to green ground screw on base of housing. (Ground wire should be a minimum of 18-AWG.)  Reposition PC board, replace and tighten mounting screws. Ensure that banana plug on sensor lead wire is secure in sensor jack.
PAGE 6
Fail-Safe Mode The fail-safe mode on either rising or falling level can be easily changed in the field. See procedure and chart below. NOTE: Upon loss of power, or some component failures, the output relay is de-energized andits contacts return to the “shelf position” NC (Normally Closed) to signal an alarm condition regardless of process level.  Disconnect line power supply. Electrical power must be disconnected from explosion-proof models before the cover is removed.
PAGE 7
Circuit Board Replacement NOTE: Replacement of circuit boards not  Disconnect power to the unit. allowed on agency listed units.  Remove the housing cover.  Remove two mounting screws and slide out PC board to expose green ground screw       in the bottom of the housing. Remove the ground screw and ring terminal from inside the housing. Disconnect the banana plug from the sensor. Connect the banana plug from the new board to the sensor. Make sure the connection is tight.
PAGE 10
Troubleshooting Symptom/Problem LED will not illuminate, even at maxmum sensitivity setting (full clockwise 25 turns) Possible Cause 1. Antenna banana plug loose or disconnected. 2. No power to circuit. Corrective Action 1. Plug antenna banana plug securely into sensor jack. 2. Check voltage at terminal block as appropriate. L1 N L1 L2 ++- 95-130 VAC 195-250 VAC 24 + 10% VDC 12 + 1 0% VDC 3. Blown fuse. 4. Faulty sensing circuit. 3. Replace line fuses F1 and F2. 4. Replace PC board.
PAGE 11
Dimensions 116.7 4.59 96.0 3.78 ELECTRICAL CONNECTION 3/4 NPTF 1 C PROCESS CONNECTION SEE TABLE 1 B INACTIVE SHEATH LENGTH (PER MODEL NUMBER) A LENGTH (PER MODEL NUMBER) 19.1 0.75 (INACTIVE SHEATH ONLY) NOTES: 1 D 1. DIMENSION APPROXIMATE AND BASED ON A FIVE THREAD ENGAGEMENT. Linear = mm/inches Dimensions are for reference only. Contact the factory for certified drawings for a particular model number.
PAGE 12
Dimensions Dimensions are for reference only. Contact the factory for certified drawings for a particular model number. 3/4-16 UNF-2 31.8 1.25 DUAL RIGID PROBE DETAIL 28.4 1.12 50.8 2.00 MINIMUM CLEARANCE HOLE FOR INSTALLATION 54.9 2.16 SEE DETAIL A 27.0 1.06 DUAL CABLE PROBE DETAIL 31.8 1.25 54.0 2.13 D 36.5 1.44 Linear = mm/inches Drawing 0390652 3/4-16 UNF-2B X 11.1 0.44 22.2 0.88 DETAIL A SCALE 1.5 Printed in USA www.sorinc.