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CONDUCTIVITY
MONITOR/CONTROLLERS
Installation • Operation • Maintenance
User Manual for Models: 755, 756, 757, 758, 767
2450 Impala Drive
Carlsbad, CA 92010-7226 USA
Tel: 1-760-438-2021
Fax: 1-800-869-7668 / 1-760-931-9189
www.myronl.com
Water Quality Instrumentation
Accuracy • Reliability • Simplicity
®
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Summary of Contents for Myron L 755
- Page 1 CONDUCTIVITY MONITOR/CONTROLLERS Installation • Operation • Maintenance User Manual for Models: 755, 756, 757, 758, 767 ® 2450 Impala Drive Carlsbad, CA 92010-7226 USA Tel: 1-760-438-2021 Fax: 1-800-869-7668 / 1-760-931-9189 Water Quality Instrumentation www.myronl.com Accuracy • Reliability • Simplicity...
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Page 2: Table Of Contents
Decreasing Set Point Conversion ....................10 3.3.2 Set Point Adjustment ........................10 CHECK-OUT PROCEDURES ........................10 3.4.1 Model 755 (Only) ......................... 10 3.4.2 Models 756, 757, 758 & 767 ......................10 COMPONENT IDENTIFICATION, CALIBRATION AND PREVENTIVE CARE PRIMARY COMPONENT IDENTIFICATION ....................11 METER MECHANICAL ZERO PROCEDURES .................. -
Page 3: Introduction
This manual provides the user with the necessary information to ® Refer to Conductivity/ppm Ranges sheet on Page 3 for install, operate and maintain the Myron L Company’s 750/760 Conductivity Ranges. Series Conductivity Monitors. Sections 1 through 3 provide Monitor... -
Page 4: Conductivity Cells
PRESSURE/TEMPERATURE LIMITS: 100 psi (689.6 kPa) at 212°F (100°C) MODEL TYPES: BUSHING: 755: Small controller only CS51 (LC): Modular Polypropylene threaded " NPT 756: Small analog monitor only (no relay) CS52: 316 stainless steel " NPT internal to cell body... - Page 5 *CS52 SERIES CONDUCTIVITY CELLS REQUIRED FOR THESES RANGES ** READS IN MILLISIEMENS (mS) *** CS51LC CELL (0.1 constant) REQUIRED FOR THIS RANGE NOTE: UNLESS ppm/NaCl is specified with order, ppm type conductivity instruments will be calibrated on the ® Myron L “442” Natural Water™ standard...
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Page 6: Installation
WARNING! ® The Myron L Company recommends that all mounting and There are three basic guidelines to consider when selecting a electrical installation procedures be performed by trained and Monitor’s mounting location: authorized personnel ONLY! Failure to do so could result in personal injury or loss of life. -
Page 7: Surface Mounting With Smp Assembly
NOTE: 2.3 CELL INSERTION/DIP MOUNT ASSEMBLIES The 750/760 Series Conductivity Monitors are not designed to A CS51 Cell’s mounting orientation must provide a continuous operate with a Cell cable length that exceeds 100' (30 meters). and adequate circulation flow to prevent the trapping of air STEP 3 If at all possible, mount the Monitor at eye level for bubbles within the Cell’s electrode area. -
Page 8: Electrical Installation
2.4 ELECTRICAL INSTALLATION The electrical installation procedures provided in this manual are common to all Conductivity Monitors. See Fig. 2-1 for the hole dimensions of the enclosure’s cable access holes. Unless otherwise instructed, refer to Fig. 2-4 and 2-5 for the 750/760 Series Monitor’s terminal block (TB) connector wiring designations. -
Page 9: Connecting The Cell Cable
STEP 2 Neatly connect the Relay cable wires to the Monitor’s TB connectors (See Fig 2-4-1 or 2-5-1) as explained below. All Myron L Company Conductivity Monitor/ Controllers (except Model 756) are equipped with a relay which is designed to energize/de-energize when the set point is crossed. -
Page 10: Operating Procedures
BELOW the Monitor’s set point adjustment. 3.1.3 SET POINT ADJUSTMENT KNOB Available on the 755 controller only. Front panel adjustment knob provides immediate access for adjusting the Monitor’s set point setting and to verify its full scale reading. -
Page 11: Model 767 Standard And Optional Features
3.2 MODEL 767 STANDARD AND OPTIONAL FEATURES Normally, if the conductivity signal becomes greater than the set point signal, the alarm relay will be energized. The user may This section describes the standard and optional features of the adjust two jumpers that will cause the alarm relay to be Model 767 Conductivity Monitor/Controller. -
Page 12: Decreasing Set Point Conversion
NOTE: STEP 6 Adjust the alarm to the desired set point. Release the Because the Model 755 is equipped with a standard front panel “SET POINT CHECK” switch. Set Point trimmer adjustment knob, it does not have an internal NOTE: set point adjustment setting. -
Page 13: Primary Component Identification
SECTION 4 Component Identification/Calibration and Preventive Maintenance 4.1 PRIMARY COMPONENT IDENTIFICATION The Conductivity Monitors’ Control boards are contained within and mounted to the back of the enclosure. The 767 Monitor, As identified in Section 3, the Conductivity Monitors’ switch and when equipped with the 3 Cell Input option, has a second indicator components are mounted directly to the front panel. -
Page 14: Meter Mechanical Zero Procedures
The best method of recalibrating your conductivity monitor/controller is CAUTION! FOR 4-20mA OPTION ONLY with NIST traceable Standard Solution (available from your Myron L The proper supply voltage (V Supply) and load resistance (R) must be Company distributor, or elsewhere). Because it includes the sensor, selected. -
Page 15: Model 767
TEST position and set the Remote Meter trimmer (R28) to indicate a full scale reading on the remote meter. 4.4 PREVENTIVE CARE ® The Myron L Company recommends that the following Preventive Care procedures be observed. STEP 1 Try to prevent exposure to excessive heat and moisture. - Page 16 A reasonable service charge will be made for diagnosis or repairs due to normal wear, abuse or tampering. Warranty is limited to the repair or replacement of monitor or cell only. The Myron L Company assumes no other responsibility or liability. SECTION 5...
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