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Summary of Contents for LaMotte pHPLUS DIRECT 2
- Page 1 Code 5-1936-01...
- Page 3 PREFACE This manual serves to explain the use of the pHPLUS DIRECT 2 meter. This manual functions in two ways: fi rst as a step by step guide to operating the meter; second, as a handy reference guide. This manual is written to cover as many anticipated applications of the meter as possible.
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Page 4: Table Of Contents
TABLE OF CONTENTS INTRODUCTION GETTING STARTED Description of Keypad Functions Description of LCD Annunciators Inserting & Removing the Rubber Boot/Stand Inserting New Batteries Battery Replacement Connecting the Probe and Temperature Sensor Conditioning the pH Probe Switching the Meter On CALIBRATION pH Calibration 3.1.1 pH Calibration Procedure 3.1.2 Changing the pH Buff... -
Page 5: Introduction
1. INTRODUCTION The pHPLUS DIRECT 2 microprocessor-based handheld meter is economical and easy to use. It has a large custom LCD (Liquid Crystal Display) for clear and easy reading. The meter measures pH, mV (ORP), temperature and allows direct ion concentration measurement of various ions (mono and divalent). -
Page 6: Getting Started
2. GETTING STARTED 2.1 Description of Keypad Functions The pHPLUS DIRECT 2 has six keys on the splash-proof keypad: ON/ OFF, HOLD/ENTER, CAL, MODE, ON/OFF Powers meter on and off . Meter starts up in the mode that was last used. -
Page 7: Description Of Lcd Annunciators
2.2 Description of LCD Annunciators The large custom LCD consists of 3½-digit segments which uses annunciators for pH, mV or oC (Temperature). No annunciator is shown in Ion mode. Other annunciators include “HO” (when HOLD function is activated) and “LO” (low battery condition). 2.3 Inserting &... -
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 the cover in the direction of the arrow and lift up. Note the polarity of the batteries before inserting them into position. -
Page 9: Connecting The Probe And Temperature Sensor
2.6 Connecting the Probe and Temperature Sensor To connect the probe to the meter, align the BNC connector slots with the posts of the meter socket and rotate the connector clockwise until it locks. Do not force the connector. To remove the probe, rotate the connector in a counter-clockwise direction until it unlocks, and slide the connector off... -
Page 10: Calibration
default) or the last calibrated temperature value will be displayed. If a temperature probe is connected, the current measured temperature will be displayed. 3. “Or” (Over range) indicates the reading exceeds the maximum measurement range. “Ur” (Under range) indicates the reading is under the minimum measurement range (see Section 7 Specifi... -
Page 11: Ph Calibration Procedure
Before use, remove the plastic protective cap on the pH probe and condition the glass bulb by soaking it in tap water or pH buff er (preferably pH 4) for 1-2 hours. This will hydrate the glass bulb if the probe is too dry or if it has not been used recently. -
Page 12: Changing The Ph Buffer Group
3.1.2 Changing the pH Buffer Group The meter can be calibrated with pH standards of USA, NIST (nSt) or Low Ionic (Pb) pH buff er groups. The factory default is the USA buff er group. To abort the buff er group selection, press CAL to revert to the pH measurement mode. -
Page 13: Resetting User Calibrated Values
3.1.3 Resetting User Calibrated Values The calibrated pH/mV/Ion values can be reset to the factory default using the procedure below. The temperature off set will not be reset using this procedure. To abort the reset, press CAL to revert to the measurement mode. - Page 14 3.2.1 Ion Calibration Procedure The pHPLUS Direct 2 can measure a variety of ions. Ion measurement requires an ISE (Ion Selective Electrode)—(sold separately) which measures the specifi c ion of interest—such as ammonia or fl uoride. The available ion calibration values 0.1, 1.0, 10.0, and 100.0 ppm.
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Page 15: Temperature Calibration
6. Press ENTER to confi rm that the ppm value is the desired standard. The displayed value will show the corresponding mV reading for the selected ppm value. Allow the reading to stabilize. 7. When the mV reading is stable, press ENTER to complete the calibration for the second standard. -
Page 16: Without Temperature Probe (No Atc)
3. Press the CAL key to enter the temperature calibration mode. The DISPLAY will show “CA” momentarily and the displayed reading will fl ash. 4. Press the keys until the display shows the desired temperature. The meter will allow an adjustable maximum value of ±... -
Page 17: Measurement
5. To cancel or abort this operation, press the CAL key. To confi rm the calibration, press the ENTER key. A new value will be stored in the meter non-volatile memory. The DISPLAY will display “CO” momentarily, and the meter will revert to the measurement mode. -
Page 18: Releasing A Held Reading
4.4 Releasing a Held Reading Press the HOLD key once again to deactivate the HOLD function or to release the frozen reading. The meter will revert to the current measurement mode, and the “HO” annunciator will disappear from the DISPLAY. 5. -
Page 19: Troubleshooting
6. TROUBLESHOOTING Problem Cause Solution No display Batteries not in place. a) Insert batteries. b) Re-insert batteries in correct polarity. “---“ on Meter does not have 2 Perform 2 or 3 point ion display point calibration calibration. “LO” displays Low battery Replace batteries. -
Page 20: 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 21: Replacement Parts And Accessories
8. REPLACEMENT PARTS AND ACCESSORIES Item Description Code pH Probe 1904 Temperature Probe 1909 AC Adapter, 110 mV 1726-110 Buff er, pH 4.01, 120 mL 2866-J Buff er, pH 7.00, 120 mL 2881-J Buff er, pH10.00, 120 mL 2896-J Mini Buff er Tablets, pH 4.0, 50 tablets 3983A-H Mini Buff... -
Page 22: Warranty
9. WARRANTY LaMotte Company warrants this instrument to be free of defects in parts and workmanship for 3 years from the date of shipment and the probe to be free of defects in parts and workmanship for 6 months from the date of shipment. - Page 24 PO Box 329 • Chestertown • MD • 21620 800-344-3100 • 410-778-3100 • f 410-778-6394 www.lamotte.com 626094-30 11/19...
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