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Summary of Contents for LaMotte pHPLUS DIRECT
- Page 1 Instruction Manual pHPLUS DIRECT pH/mV/ISE Meter Code 5-1936...
- Page 3 This manual is written to cover as many anticipated applications of the pHPLUS DIRECT meter as possible. If there are doubts in the use of this meter, please do not hesitate to contact the LaMotte Tech Service Department.
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Page 4: Table Of Contents
Table of Contents 1. Introduction ......2. Getting Started ......6 2.1 Description of Keypad Functions . -
Page 5: Introduction
It has a large custom LCD (Liquid Crystal Display) for clear and easy reading. The pHPLUS DIRECT measures pH, mV (ORP), temperature and ion concentration of various ions (mono and di valence) with ion selective electrodes (ISEs). -
Page 6: Getting Started
2. GETTING STARTED 2.1 Description of Keypad Functions The pHPLUS DIRECT has six keys on its splash-proof keypad with tactile feedback. The keys include ON/OFF, HOLD/ENTER, CAL, MODE, p and q keys. Powers meter on and off. Meter starts up in the mode that you were in before turning the meter off. -
Page 7: Description Of Lcd Annunciations
2.2 Description of LCD Annunciators The meter has a large custom LCD that consists of 3½-digit segments and operation annunciators for pH, mV or °C (Temperature). Note that there is no annunciator shown in the Ion mode. Other annunciators include “HO” (when the HOLD function is activated) and “LO”... -
Page 8: Inserting New Batteries
2.4 Inserting New Batteries The battery compartment is found at the back of the instrument. To open the battery compartment, push in the direction of the arrow and lift up the cover. Note the polarity of the batteries before inserting them into position. After replacement, replace the cover and press down until it locks tight. -
Page 9: Condition The Ph Electrode
BNC of pH/ORP Phono jack of Electrode or ISE Temperature probe Insert the mini phono jack of the temperature sensor into the socket on the meter. Unplug the phono jack when not in use or when pH is being measured without any temperature compensation. -
Page 10: Calibration
3. CALIBRATION 3.1 pH Calibration The meter is capable of calibrating up to 3 points using USA or NIST (nSt) pH buffer standards or 2 points with Low Ionic (Pb) pH buffer standards. All new calibration values will automatically override existing data. pH 4.01,7.00 and 10.01 NIST pH 4.01, 6.86 and 9.18... -
Page 11: Selection Of Ph Buffer Standards
3.2 Selection of pH Buffer Standards You must set the meter to accept either USA, NIST (nSt) or Low Ionic (Pb) pH buffer standard values before calibration. The factory default is USA standard. If you wish to abort this operation press the CAL key at any sequence and the meter reverts to pH measurement mode. -
Page 12: Ph Calibration Using Usa Standard Buffers
3.2.2 pH Calibration using USA standard buffers 1. Pour a known pH buffer standard solution into a clean, dry container, e.g. pH 7.00. Power on the meter and it will automatically enter the measurement mode. Select the pH mode by pressing the MODE key if necessary. -
Page 13: Ph Calibration Using Nist Standaard Buffers
3.2.3 pH Calibration using NIST standard buffers 1. Pour a known pH buffer standard solution into a clean container, e.g. pH 6.86. Power on meter, and it will automatically enter the measurement mode. Select the pH mode by pressing the MODE key if necessary. 2. -
Page 14: Ph Calibration Using Pb Standard Buffers
3.2.4 pH Calibration using Pb standard buffers Pour a known pH buffer standard solution into a clean container, e.g. pH 6.97. Power on meter, and it will automatically enter the measurement mode. Select the pH mode by pressing the MODE key if necessary 2. -
Page 15: Ion Calibration
3.3 Ion Calibration The pHPLUS DIRECT meter is capable of up to 3-point ion calibration (minimum 2 point) with standard solutions to ensure accuracy across the entire range of the meter. To exit calibration after you have first entered into ion calibration, press the CAL key again. -
Page 16: Multi-Point Ion Calibration
3.3.1 Multi-point Ion Calibration If a calibration with a 1.0 ppm standard is desired, the 0.1 ppm calibration can be skipped (see below*). For instance if a 1.0 ppm calibration standard is used, pour a known 1.0 ppm standard solution into a clean container. Power on the meter, and set the meter to Ion measurement mode. -
Page 17: Temperature Calibration
9. Press the ENTER key to confirm the second calibration point (e.g. 10.0 ppm). The display will show the next calibration option, 100.0 ppm. To exit from the 2-point calibration, press the CAL key. The LCD will show “PXX mV” momentarily which is the ISE slope in mV value. The meter then reverts to ion measurement mode. -
Page 18: Without Temperature Probe (No Atc)
5. To cancel or abort this operation, press the CAL key. Note no new value will be stored into the meter's non-volatile memory. To confirm the calibration, press the ENTER key. The LCD displays “CO” momentarily, and the meter reverts to the measurement mode. 3.4.2 Without Temperature probe (no ATC) If a temperature probe is not used, the meter compensates for the pH response based on a new calibrated temperature value manually set or at 25.0 °C... -
Page 19: Measurement
4. MEASUREMENT 4.1 Taking Measurements 1. Before measurement, rinse the pH/ORP electrode or Ion Selective Electrode (ISE) and temperature probe thoroughly with tap or distilled water to remove any impurities on the bodies of probes. 2. Power on the meter using the ON key. Press the MODE key to select the desired mode of operation (pH, mV, Ion or Temperature). -
Page 20: Electrode Care And Maintenance
5. ELECTRODE CARE AND MAINTENANCE For best results, always keep the ISE capped dry and pH/ORP electrode bulb wet. Store the pH/ORP glass bulb with pH electrode storage solution. pH buffers are also suitable. NEVER use deionized water for storage. Wash the probes thoroughly with distilled water after each use. -
Page 21: Specifications
7. SPECIFICATIONS Ion Range 0.01 to 1999 ppm Resolution 0.01 ppm for 0.01 to 0.99 ppm; 0.1 ppm for 1.0 to 199.9 ppm; 1 ppm for 200 to 1999 ppm Accuracy +/- 1% of reading No. of Calibration Pts 2 to 3 points (minimum 2 pts) pH Range 0.00 to 14.00 pH Resolution... -
Page 22: Accessories
LaMotte Company by calling 1-800-344-3100, faxing 1-410-778-6394, or emailing tech@lamotte.com. Often a problem can be resolved over the phone or by email. If a return of the meter is necessary, attach a letter with the return authorization number, meter serial number, a brief description of problem and contact information including phone &... - Page 23 (1) year from the original purchase date. In the event that a defect is found during the warranty time frame, LaMotte Company agrees that it will be repaired or replaced without charge except for the transportation costs.
- Page 24 LaMOTTE COMPANY Helping People Solve Analytical Challenges ® PO Box 329 • Chestertown • Maryland • 21620 • USA 800-344-3100 • 410-778-3100 (Outside U.S.A.) • Fax 410-778-6394 Visit us on the web at www.lamotte.com 626094-29-01/08...