Myron L 512M5 DS Conductivity Meter User Manual

Introduction

The Myron L DS Conductivity Meter model 512M5 is a portable, hand-held single-range instrument designed for fast, accurate, and on-the-spot measurement of conductivity. It features a scale of 0-5000 micromhos (µMhos) or 0-5000 microsiemens (µS) and incorporates built-in electrodes for maximum protection and durability. This reliable instrument has been field-tested for over 40 years, making it a popular choice for various applications requiring precise conductivity measurements.

Safety Information

Please read and understand all safety instructions before operating the Myron L 512M5 DS Conductivity Meter. Failure to follow these instructions may result in damage to the instrument or personal injury.

• Do not immerse the entire meter in liquid. Only the electrode portion should be submerged.
• Avoid dropping the instrument or subjecting it to severe impact.
• Do not attempt to open the meter casing beyond battery compartment access, as this may void the warranty and expose internal components.
• Keep the meter away from extreme temperatures and direct sunlight.
• Use only the specified 9-volt battery.
• Dispose of batteries according to local regulations.

Components and Features

The Myron L 512M5 DS Conductivity Meter is a compact, robust device. The image displays the meter from an elevated angle, showcasing its main components:

• Meter Display: A large, easy-to-read analog taut-band meter with a scale from 0 to 5000 micromhos/microsiemens per centimeter.
• Sample Cup/Electrode Well: A white, circular well located on top of the unit, designed to hold the sample liquid for measurement. This well contains the built-in electrodes.
• Carrying Handle: A black strap handle for portability.
• Battery Compartment (not visible): Located on the rear or bottom, accessible for 9-volt battery installation.
• Calibration Adjustment (not visible): Typically a small screw or knob for calibration purposes.

Setup

1. Battery Installation

1. Locate the battery compartment cover, usually on the rear or bottom of the unit.
2. Remove the cover.
3. Connect a new 9-volt battery to the battery clip, ensuring correct polarity.
4. Place the battery into the compartment and replace the cover securely.
5. The meter is now powered and ready for use. Battery life is typically over 2000 tests or 1 year.

2. Initial Check

Before first use, ensure the meter needle rests at zero when no sample is present. If it does not, refer to the calibration section in the Maintenance chapter.

Operating Instructions

Taking a Measurement

1. Prepare the Sample: Ensure the sample liquid is free of air bubbles and suspended solids.
2. Fill the Sample Cup: Pour the sample liquid into the white sample cup/electrode well on top of the meter. Fill it sufficiently to cover the electrodes completely.
3. Read the Measurement: The meter will automatically display the conductivity reading on the analog scale. Allow a few seconds for the reading to stabilize.
4. Record the Reading: Note down the value indicated by the needle on the scale. The scale is marked in micromhos/microsiemens per centimeter.
5. Empty and Rinse: After each measurement, empty the sample cup and rinse it thoroughly with deionized or distilled water to prevent contamination for subsequent readings.
6. Temperature Compensation: The meter automatically compensates for temperature variations from 50° to 160°F (10° to 71°C), ensuring accurate readings across a range of temperatures.

Maintenance

Cleaning the Electrodes

Regular cleaning of the electrodes is crucial for accurate measurements.

• After each use, rinse the sample cup and electrodes with clean water.
• If deposits build up, gently clean the electrodes with a soft brush or cotton swab and a mild detergent solution. Rinse thoroughly afterwards.
• Do not use abrasive materials or strong solvents, as these can damage the electrodes.

Calibration

While the Myron L 512M5 is designed for stability, periodic calibration with a known standard solution is recommended to ensure continued accuracy.

1. Obtain a conductivity standard solution with a known value within the meter's range (e.g., 1000 µS/cm).
2. Fill the sample cup with the standard solution.
3. Locate the calibration adjustment screw (refer to the product diagram or manufacturer's specific instructions if unsure).
4. Using a small screwdriver, carefully turn the adjustment screw until the meter needle reads the exact value of the standard solution.
5. Rinse the sample cup and electrodes thoroughly after calibration.

Battery Replacement

Replace the 9-volt battery when the meter needle becomes sluggish or does not respond correctly. Follow the battery installation steps outlined in the Setup section.

Troubleshooting

Specifications

• Model: 512M5
• Measurement Range: 0-5000 µMhos/µS (micromhos/microsiemens per centimeter)
• Temperature Compensation: Automatic, from 50° to 160°F (10° to 71°C)
• Power Source: One 9-volt battery
• Battery Life: >2000 tests / 1 year
• Readout: 2½ inch taut-band shock resistant analog meter
• Dimensions (L x W x H): 7.1 x 6.9 x 5.25 inches
• Weight: 1.12 Pounds
• Color: Black
• Manufacturer: Myron L

Warranty and Support

For specific warranty information and technical support, please refer to the official Myron L Company website or contact their customer service department. Keep your purchase receipt as proof of purchase for warranty claims.

Myron L Company Contact Information:

• Website: www.myronl.com (Example link, verify actual manufacturer website)
• Customer Service: Refer to the website for contact numbers and email addresses.