User Manual ExStik®II EC400 Conductivity / TDS / Salinity / Temperature Meter Additional User Manual Translations available at www.extech.
Introduction Congratulations on your purchase of the ExStik®II EC400 Conductivity/Total Dissolved Solids (TDS) / Salinity / Temperature meter. With the EC400’s dynamic cell-constant technology it is possible to measure a wide range of Conductivity, TDS, and Salinity with the same electrode. Careful use and maintenance will provide years of reliable service. Powering the ExStik®II The ExStik®II uses four (4) CR2032 Lithium Ion Batteries (included).
Meter Description Front Panel Description 1 1. Battery compartment 2. LCD Display 3. MODE/HOLD button (change mode, Hold and store data) 2 4. CAL/RECALL button (calibrate, change temperature units, recall data) 5. ON/OFF button 6. Electrode Collar 3 4 5 7. Electrode 6 7 LCD Display 1. Bargraph display 2. Measurement units 3. Main display 4. Range calibration and low battery indicators 5. Temperature display 6. Reading Hold Indicator 3 EC400-en-GB_V2.
Measurement Procedure Sample Preparation: 1. For Conductivity, TDS or Salinity place the test sample in a sample cup with enough depth (2.5cm minimum) to cover the electrode. Stir the solution to remove any air bubbles. Measurement: 8888 1. Press the ON button. ( and then “SELF CAL” will appear in the display during the turn-on diagnostics) 2. Depress and hold the MODE/HOLD key to scroll to the desired measurement mode. 3.
Changing Measurement Function The meter can be set to measure Conductivity, TDS or Salinity. To change the mode: 1. Press and Hold the MODE/HOLD button for 2 seconds and the display will begin to scroll through the units. µS (Conductivity); ppm (TDS); mg/l (TDS); ppm S (Salinity); Note: The “HOLD” function cannot be on when changing the measurement function. If “HOLD” is displayed in the lower left corner of the display, briefly press the MODE/HOLD button to turn it off. 2.
Recalling Stored Readings 1. Press the CAL/RECALL button and then press the MODE/HOLD button. A location number (1 through 25) will briefly appear and then the value stored in that location will appear. The displayed units will flash, indicating that the storage recall mode is active. 19.5 °C 2. The last stored reading will be displayed first. Pressing and releasing the MODE/HOLD button will scroll through the stored readings one at a time.
Measurement and Display Considerations If the unit appears to be locked (display frozen). It is possible that the Data Hold mode has been inadvertently accessed by pressing the MODE/HOLD button. (“HOLD” will be displayed in the bottom left of the LCD.) Simply press the MODE button again or turn the meter off and then on. For maximum accuracy, allow sufficient time for the temperature of the probe to reach the temperature of the sample before calibrating.
Considerations and Techniques Do not touch the inner surfaces of the conductivity electrodes. Touching the surface of the platinized electodes may damage and reduce the life of the probe. Store the electrode dry, in the storage cap. Always rinse the electrode in de-ionized water between measurements to avoid cross contamination of the sample. Double rinsing is recommended when high accuracy is required.
Specifications Display 2000 count LCD with Bargraph Conductivity ranges 0 to 199.9µS/cm 200 to 1999µS/cm 2.00 to 19.99mS/cm TDS ranges 0 to 99.9ppm or mg/L (Variable ratio) 100 to 999ppm or mg/L 1.00 to 9.99ppt or g/L Salinity range 0 to 99.9ppm 100 to 999ppm 1.00 to 9.99ppt TDS Ratio 0.4 to 1.0 adjustable Salinity Ratio 0.4 to 0.6 automatic Conductivity ATC 2.0% per oC Conductivity ATC Range 0.0°C to 60.0oC (32.0°F to 140oF) Temperature Range 0.0°C to 65.0oC (32.
Maintenance Battery Replacement 1. Twist off the battery compartment cap. 2. Holding the battery housing in place with a finger, pull out the battery carrier using the two small tabs. Replace the four (4) CR2032 batteries observing polarity. Replace the battery compartment cap 3. 4. Never dispose of used batteries or rechargeable batteries in household waste.
Cleaning Recommendations When cleaning the probe, take care not to scratch or damage the platinized electrode surfaces. Contaminant Cleaning Solution Instructions Water soluble substances Deionized water Soak or scrub gently with a soft brush. Rinse thoroughly with DI water, and dry Grease & Oil Warm water and household detergent Soak or scrub with a soft brush, maximum of 10 minutes.
