Instruction Manual

ManualsBrandsSOR ManualsSensorsSingle Point RF Level Switch

Form 925 (08.13) ©SOR Inc.

1/16

The RF Two-Wire Level Control produces a 7.5 mA (± 1.5 mA) or

14.5 mA (± 2 mA) current to indicate liquid presence/absence at the

sensor. A sensor attached to the control acts as an antenna to

transmit the process material level to the electronics.

The Failsafe Select switch determines the output of the unit when the

process is touching the probe. A green LED on the control indicates

7.5 mA (±1.5 mA) output. A yellow LED on the control indicates

14.5 mA (± 2 mA) output.

The RF Two-Wire level Control can be mounted with the sensor in

the process (integral units K housing), or up to 150’ (45m) from the

sensor in the remote configuration (R housing).

The RF Two-Wire level Control constantly monitors sensor integrity.

In the unlikely event of a sensor failure or remote electronic sensor

module failure, the red LED is lit and indicates 25.5 mA (±1.5 mA) output.

An optional timer (DT accessory) is available to delay the current change

from 0 seconds to 10 minutes. The delay timer provides added process

control, valuable for use in turbulent conditions. An optional adjustable

differential circuit (AD accessory) allows the user to select on and off at

different level points for the control.

DT and AD accessories may not be used on the same control unit.

General Instructions

Registered Quality System to ISO 9001

Design and

specifications are

subject to change

without notice.

For latest revision, go to

sorinc.com

Table of Contents

Pre-Installation Test ............................2

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

Remote Cable Connection .....................4

Electrical Connection ...........................5

SOR RF Probe Grounding Scheme ...........6

Set Point and Sensor Monitor Calibration ..7

Adjustable Differential Calibration ...........9

Delay Timer Operation .........................9

Sensor Replacement ......................... 10

Circuit Board Replacement .................. 10

Troubleshooting ............................... 11

Dimensions ................................ 12-14

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.

RF Two-Wire Level Control

with Sensor Monitor

Summary of content (16 pages)

PAGE 1
RF Two-Wire Level Control with Sensor Monitor General Instructions The RF Two-Wire Level Control produces a 7.5 mA (± 1.5 mA) or 14.5 mA (± 2 mA) current to indicate liquid presence/absence at the sensor. A sensor attached to the control acts as an antenna to transmit the process material level to the electronics. The Failsafe Select switch determines the output of the unit when the process is touching the probe. A green LED on the control indicates 7.5 mA (±1.5 mA) output.
PAGE 2
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.
PAGE 3
 Immerse the sensor in the process material; the green LED should be off. If not, it may be necessary to decrease the setpoint.  To detect an interface, such as oil/water or foam/liquid, the lighter material must be on the sensor, then tuned out. Then adjust the setpoint to detect the heavier process \ material. (See and ).
PAGE 4
Remote Cable Connection Conduit must be installed between the sensor base and the electronics housing to provide a raceway for sensor extension cables. (See ). Electical 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. Ensure that wiring conforms to all applicable local and national electrical codes and install unit(s) according to relevant national and local safety codes.
PAGE 5
Control Board Control Board Terminal Block Remote Sensor Board Remote Board Terminal Block Probe Connector Electronics Housing Conduit must meet Class I Group C & D; Class ll Groups E, F & G; Division 1 & 2 Sensor Base Electrical Connection Green LED Use 22 AWG shielded three-conductor cable to make all signal and power connections. Ensure that wiring conforms to all applicable local and national electrical codes and install unit(s) according to relevant national and local safety codes.
PAGE 6
SOR RF Probe Grounding Scheme SOR RF Probe Grounding Scheme Critical Grounding Path = Power Supply Line Circuit Board Line Neutral Neutral Ground Ground Electronics Housing Process Connection IMPORTANT! Do not provide separate earth grounding for the process connection. This can create a parallel grounding circuit that will impair operation and calibration. Do not provide separate earth grounding for the process connection.
PAGE 7
Sensor Monitor and Set Point Calibration Electical 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.  Make sure the power source is turned off.  Remove the housing cover.  Pull power and signal wires through the conduit connection and into the control housing.  Locate Loop Power Terminal Block on the control board. (See ). Terminals are labeled “+” and “-”.
PAGE 8
Sensor Monitor Calibration (with probe attached)  Remove the housing cover.  Verify there is no process material on the probe.  Turn ALARM adjustment counterclockwise until the red LED just lights. At this point, the loop current is stable at 25.5 mA +1.5 mA. Turn the adjustment clockwise until the red LED turns off. Turn ALARM adjustment 1/2 turn further clockwise. At this point, the loop current is stable at 7.5 mA ± 1.5 mA or 14.5 mA ± 2 mA. Current Output Green LED (7.5 mA) Yellow LED (14.
PAGE 9
Adjustable Differential Set Up Perform set point adjustment per previous Differential Adjustment instructions. Move the process level above the setpoint. Turn the adjustment on the AD (adjustable differential) circuit board fully counterclockwise. Move the process level to the point where the control will change state. Turn the adjustment on the AD circuit board clockwise carefully until green and yellow LED’s exchange states.
PAGE 10
Sensor Replacement  Disconnect power to the unit.  Remove the housing cover.  Remove two screws holding bracket to plastic holder.  Slide out PC board to expose the sensor connection.  Disconnect the sensor wire.  Unscrew the sensor from the housing.  Apply thread sealant to the male threads of the new sensor.  Thread the new sensor into the bottom of the housing.  Connect the sensor wire to the “probe” connection on the circuit board.
PAGE 11
Troubleshooting Sympton/Problem No current in the loop No LED’s lit Current is greater than 27mA Current is 8mA when 16mA is expected or Current is 16mA when 8mA is expected Current is not 8, 16, or 27mA or within tolerances Possible Cause Corrective Action 1. Power supply turned off 2. Improperly wired terminal block 3. Broken power supply wire 1. Check power supply source 2. Check terminal block wiring 3. Check loop wire integrity 1. Incorrectly wired circuit 2. Circuit malfunction 1.
PAGE 12
Dimensions Dimensions are for reference only. Contact the factory for certified drawings for a particular model number. 116.7 4.59 96.0 3.78 1 3/4 NPTF ELECTRICAL CONNECTION 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) D NOTES: 1. DIMENSION APPROXIMATE AND BASED ON A FIVE THREAD ENGAGEMENT. 1 SENSOR STYLE BARE DIM B PROCESS CONNECTION 3/4 NPTM 1, 1-1/2, & 2 NPTM FLANGED STILLING WELL CABLE PROBE 87.
PAGE 13
Dimensions 116.7 4.59 Dimensions are for reference only. Contact the factory for certified drawings for a particular model number. 213.5 8.41 45.2 1.78 96.0 3.78 2X 3/4 NPTF ELECTRONICS HOUSING NOTES: 1 118.6 4.67 1. DIMENSION APPROXIMATE AND BASED ON A FIVE THREAD ENGAGEMENT. SENSOR STYLE BARE SHEATH BARE WITH STILLING WELL SHEATH WITH STILLING WELL CABLE INACTIVE SHEATH 96.0 3.78 3/4 NPTF ELECTRICAL CONNECTION DIM D 12.7 0.50 15.9 0.63 26.7 1.05 26.7 1.05 7.9 0.31 15.9 0.
PAGE 14
Dimensions Dimensions are for reference only. Contact the factory for certified drawings for a particular model number. DUAL RIGID PROBE DETAIL 31.8 1.25 50.8 2.00 2.00 28.4 1.12 MINIMUM CLEARANCE HOLE MINIMUM CLEARANCE HOLE FOR INSTALLATION 54.9 2.16 D 36.5 1.44 3/4-16 UNF-2B X 11.1 0.44 22.2 0.88 DETAIL A SCALE 1.5 .4 12 ISO-9001 14685 W 105TH ST LENEXA, KS 662 913-888-2630 SORINC.
PAGE 16
Printed in USA sorinc.com 14685 West 105th Street, Lenexa, KS 66215  913-888-2630  800-676-6794 USA  Fax 913-888-0767 16/16 Registered Quality System to ISO 9001 Form 925 (08.13) ©SOR Inc.