Summary of pH 5 Plus
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Page 3: Preface
3 warning! This set contains chemicals that may be harmful if misused. Read cautions on individual containers carefully. Not to be used by children except under adult supervision. Preface this manual serves to explain the use of the ph 5 plus meter. This manual functions in two ways: fi rst as a ste...
Page 4: Table of Contents
4 table of contents 1. Introduction 5 2. Getting started 6 2.1 description of keypad functions 7 2.2 description of lcd annunciators 7 2.3 inserting & removing the rubber boot/stand 8 2.4 inserting new batteries 8 2.5 battery replacement 8 2.6 connecting the electrode and temperature sensor 9 2.7 co...
Page 5: 1. Introduction
5 1. Introduction the ph 5 plus 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 ph 5 plus measures ph and temperature (°c). Meters include 4 alkaline “aaa” batteries, a rubber boot /stand, instructi...
Page 6: 2. Getting Started
6 2. Getting started 2.1 description of keypad functions the ph 5 plus has four keys on the splash-proof keypad: on/off, hold/enter, cal and mode/inc. On/off powers meter on and off. Meter starts up in the mode that was last used. Mode/inc increments values during temperature calibration mode. Cal a...
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7 2.2 description of lcd annunciators the large custom lcd consists of 3½-digit segments which uses annunciators for ph or °c (temperature). Other annunciators include “ho” (when hold function is activated) and “lo” (low battery condition). 2.3 inserting & removing the rubber boot/stand 1. To remove...
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8 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. After the batteries have been replaced, rep...
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9 2.6 connecting the electrode 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 di...
Page 10: 3. Calibration
10 2.8 switching the meter on 1. Press the on/off key. All lcd segments will display momentarily as the meter performs a self-diagnostic test. The meter will display “- - -“ if the meter has not been calibrated or if the meter has been reset. 2. Press the mode key to choose the desired measurement m...
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11 for a 1-point calibration, the calibration should be performed with a ph buffer value closest to the expected sample value being measured. The meter has automatic buffer recognition that identifi es the correct ph buffer values during the calibration. The meter will accept calibration values that...
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12 5. Allow the reading to stabilize. Press the enter key to confi rm the calibration. “co” will be displayed momentarily before reverting to the ph measurement mode. 6. For the greatest accuracy, perform a multiple-point calibration. Repeat step 1 with additional ph buffer calibration standard solu...
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13 3.1.3 resetting user calibrated values the calibrated ph values can be reset to the factory default using the procedure below. The temperature offset will not be reset using this procedure. To abort the reset, press cal to revert to the measurement mode. 1. Press and hold cal while switching the ...
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14 4. Press inc key until the display shows the desired temperature. The meter will allow an adjustable maximum value of ±5 °c from the factory default. 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 ...
Page 15: 4. Measurement
15 4. Measurement 4.1 taking measurements 1. Before measurement, rinse the ph probe and temperature probe with clean water to remove any impurities. 2. Power on the meter using the on/off key. Press the mode key to select the desired mode of operation (ph or temperature). 3. Dip the probes in the aq...
Page 16: 6. Troubleshooting
16 5. Electrode care and maintenance for best results, store the ph probe bulb wet. Store the ph glass bulb in ph probe storage solution. Never use deionized water for storage. Wash probes with clean water after each use. Ph probes are susceptible to contamination and dirt. Clean them as needed usin...
Page 17: 7. Specifications
17 7. Specifications ph range 0.00 to 14.00 ph resolution 0.01 ph accuracy ±0.01 ph ph slope range 80 to 120% no. Of calibration pts 1 to 3 points (push-button) buffer options ph 4.01, 7.00, 10.01 (usa) ph 4.01, 6.86, 9.18 (nist) ph 4.10, 6.97 (pb) temperature range 0.0 to 100.0 oc resolution 0.1 °c...
Page 18: 9. Warranty
18 8. Replacement parts and accessories item description code ph probe 1904 temperature probe 1909 ac adapter, 110 mv 1726-110 ac adapter, 220 mv 1754 buffer, ph 4.01, 120 ml 2866-j buffer, ph 7.00, 120 ml 2881-j buffer, ph10.00, 120 ml 2896-j mini buffer tablets, ph 4.0, 50 tablets 3983a-h mini buf...
Page 19: 10. Return of Items
19 10. Return of items should it be necessary to return the meter for repair or servicing, pack the meter carefully in a suitable container with adequate packing material. A return authorization number must be obtained from lamotte company by calling 800-344-3100 (us only) or 410-778-3100, faxing 41...
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