Related Manuals for ECD L20
Summary of Contents for ECD L20
- Page 1 Model L20 Instruction Manual Microprocessor based pH, ORP, Temperature Bench Top Meter Electro-Chemical Devices, Inc. 1500 N. Kellogg Dr., Anaheim, CA 92807 USA Telephone: +1-714-695-0051 www.ecdanalytical.com...
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Page 2: Table Of Contents
Contents General Introduction ................. 1 Initial Inspection ..................2 Powering the Unit ..................2 Installing the Batteries ................2 Display and Key Functions ................ 3 A. Display ....................3 B. Keys ....................4 Operational Procedures ................5 A. Buffer Set Selection ................5 B. - Page 3 b. Manual temperature compensation, pH-AUTOLOCK mode ... 9 c. ATC/Temp probe, pH NON-AUTOLOCK mode ......10 d. Manual temperature compensation, pH NON-AUTOLOCK mode 10 D. Temperature Measure ..............10 E. mV Measurements................10 a. mV-AUTOLOCK mode ..............10 b. mV NON-AUTOLOCK mode ............11 pH Calibration Buffer Table ..............
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Page 4: General Introduction
General Introduction Thank you for selecting the Model L20 meter. The Model L20 is a precision tool that measures pH, mV, ORP or temperature—depending on the electrode you are using. A built-in microprocessor stores, calculates and compensates for all parameters related to pH determinations including pH electrode temperature characteristics, electrode slope deviations and buffer solutions. -
Page 5: Initial Inspection
Powering the Unit The L20 meter can be powered by an 115V or 230VAC adaptor as well as 6 “AAA” alkaline batteries. Check the label on the AC 3 adaptor supplied with the instrument to make sure that the AC line voltage is correct. If the wrong AC adaptor is supplied, notify your ECD representative immediately. -
Page 6: Display And Key Functions
Display and Key Functions A. Display Figure 2 1. WAIT 7. AUTO This will be displayed when the unit is AUTOLOCK mode indicator. still waiting for a stable reading or end point sensing. 2. BAT 8. Buffer Selection Low Battery Indicator This indicator will flash if the unit is not yet calibrated. -
Page 7: Keys
B. Keys On/Off Press and hold this key for 5 seconds to power on and shut off the meter. Once the unit is power up, press the same key to turn on or off the backlight. Mode Selects display mode. Pressing this key changes the display sequentially to display pH-AUTO, mV-AUTO, pH and mV. -
Page 8: Operational Procedures
Operational Procedures A. Buffer Set Selection The Model L20 meter has two buffer sets: 7.00, 4.01, 10.01pH and 6.86, 4.00, 9.18 pH. The meter is factory pre-set at 7.00, 4.01 and 10.01 pH. To change the buffer set, turn off the unit, then press and hold the “Stand”... -
Page 9: Manual Temperature Compensation, Ph-Autolock Mode
reading. Once the unit calibrates the second point, the “SLOPE” icon will flash. The unit is ready to be sloped at the third buffer. [Note: At this moment, press the “Mode” key, to exit the calibration mode. Dual point calibration is complete.] 5. -
Page 10: Atc/Temp Probe, Ph Non-Autolock Mode
If the first buffer solution is 4.00, 4.01, 9.18 or 10.00, at this moment, the unit will automatically exit the calibration mode. Single point calibration is complete.] 4. Repeat steps 4~6 of “Calibration with an ATC/Temp probe in the pH-AUTOLOCK mode” for the dual and three point calibration. c. -
Page 11: Manual Temperature Compensation, Ph Non-Autolock Mode
Allow temperature reading to stabilize, then press “Slope” key to calibrate. Once the unit calibrates the third point and the unit will automatically exit the calibration mode. The three point calibration is complete. 6. The unit calculates and compensates for the pH electrode slope deviation corresponding to the values of the three calibration buffers. -
Page 12: Ph Measurements
C. pH Measurements To take pH measurements, the pre-selected buffer solution set must lit up, indicating the unit is Single point or dual-point or three-point calibrated and ready for measurements. If buffer solution set flashes, perform a pH calibration before taking measurements. a. -
Page 13: Atc/Temp Probe, Ph Non-Autolock Mode
2. Repeat steps 2~4 of “Measurement with an ATC/Temp probe in the pH NON-AUTOLOCK mode”. D. Temperature Measure The L20 can measure temperature independently with the ATC/temp probe without using the pH electrode. Place the ATC/temp probe in the sample. The unit will display the measured temperature. - Page 14 5. When the “WAIT” icon disappears, the reading is then “LOCK” and will not respond to further changes from the sample. The mV value is the sample reading. [Note: For samples that are inherently unstable, the unit will not AUTOLOCK. In this case, use the pH NON- AUTOLOCK mode for measurements.] b.
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Page 15: Ph Calibration Buffer Table
pH Calibration Buffer Table The temperature coefficient of pH calibration buffers 4.01, 6.86, 7.00, 9.18 and 10.01 are stored inside the instrument. The buffers used to calibrate the instrument must exhibit the same temperature characteristics as the stored values. Temperature coefficient of the pH buffers °C 4.00 6.86... -
Page 16: Error Displays And Troubleshooting
“undr” ● Measured temperature is out of the 0.0 ●Bring sample temperature into the to 100.0°C range. correct measuring range. [Note: If the meter still does not perform normally after the above measures are taken, call ECD representative.]... -
Page 17: Specifications
Specifications Display Range Resolution Accuracy ±0.1% pH 0.00 to 14.00 pH 0.01 pH ±0.1%/±0.1% -1999.9 to 1999.9 mV 0.1 mV Temperature 32 to 212°F (0.0°C to 100.0 ±32.36°F (0.2 °C) 32.18° F (0.1 °C) °C) pH buffer recognition pH 7.00, 4.01, 10.01 or pH 6.86, 4.00, 9.18 pH Temperature compensation AUTO/MAN 32 to 212°F (0.0°C to 100.0 °C) pH Buffer Temperature range... -
Page 18: Warranty
Seller’s sole liabilities and the buyer’s sole remedies under this agreement shall be limited to a refund in the purchase price, or at ECD’s discretion, to the repair or replacement of any product that proves, upon ECD’s examination, to be defective, when returned to the factory, transportation prepaid by the buyer, within one (1) year of the product’s original shipment date. - Page 20 1500 N. Kellogg Dr. Anaheim, CA 92807 USA Phone +1-714-695-0051 www.ecdanalytical.com E0219...