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Before use, remove the plastic protective cap on the pH probe and 

condition the glass bulb by soaking it in tap water or pH bu

 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. Always rinse the 

probe with clean water before and after each calibration or sample 

measurement to avoid cross-contamination. For details refer to Section 5 

on Probe Care and Maintenance.

3.1.1 pH Calibration Procedure

1.  Turn on the meter and select pH by pressing 

MODE

 if necessary.

2.  Press CAL to begin pH calibration mode. “CA” (calibrate) will 

display brie

fl

 y. Notice that the pH reading and “pH” annunciator 

will both blink.

3.  Pour a known pH bu

 er calibration standard solution, e.g. pH 7.00, 

into a clean, dry container. Dip the  pH probe and temperature 

probe into the solution. Stir gently and wait for the reading to 

stabilize (approximately 30 seconds depending on the probe 

condition).

4.  When the pH reading has stabilized, the pH annunciator will 

stop blinking. Press 

HOLD/ENTER

 to con

fi

 rm the value. “CO” 

(con

fi

 rm) will display brie

fl

 y. The pH value is automatically 

adjusted to the bu

 er value shown from your selected bu

 er group. 

The example below shows a successful pH 7.00 calibration 

at 25 °C.

5.  For a one-point calibration with pH 7.00 or 6.86 only

, press 

CAL

 to return to measurement mode. However for the greatest 

accuracy, perform a multiple-point calibration. Repeat steps 3 

& 4 with additional pH bu

 er calibration standards. When you 

have completed the preset number of calibration points, the 

meter will automatically save the calibration, cease blinking, 

and begin pH measurement.

Summary of Contents for 5-1936-01

Page 1: ...Code 5 1936 01...

Page 2: ......

Page 3: ...not represent a commitment on the part of LaMotte Company WARNING Reagents marked with an are considered to be potential health hazards To view or print a Safety Data Sheet SDS for these reagents go t...

Page 4: ...alibration 10 3 1 1 pH Calibration Procedure 11 3 1 2 Changing the pH Bu er Group 12 3 1 3 Resetting User Calibrated Values 12 3 2 Ion Calibration 13 3 2 1 Ion Calibration Procedure 13 3 3 Temperature...

Page 5: ...mV ORP temperature and allows direct ion concentration measurement of various ions mono and divalent The mV mode is also useful for diagnosing problems with ion selective electrodes ISE The meter incl...

Page 6: ...up in the mode that was last used CAL Allows calibration for Ion pH mV or Temperature or to abort calibration and return to measure without confirming a value MODE Selects measurement mode for Ion mV...

Page 7: ...2 3 Inserting Removing the Rubber Boot Stand 1 To remove the meter from the rubber boot push out the bottom edge of the meter until it is completely out of the boot Ensure that the probe cables are no...

Page 8: ...he direction of the arrow and lift up Note the polarity of the batteries before inserting them into position After the batteries have been replaced reposition the cover and press down until it locks 2...

Page 9: ...without temperature compensation 2 7 Conditioning the pH Probe For best results condition the pH probe before the first use or if it has not been used for a long time by soaking it in pH 4 bu er solut...

Page 10: ...ts perform at least a 2 point calibration at room temperature 25 C using standard bu ers Begin with pH 7 00 USA group pH 6 86 NIST group or pH 6 97 Pb group For a 1 point calibration the calibration s...

Page 11: ...tandard solution e g pH 7 00 into a clean dry container Dip the pH probe and temperature probe into the solution Stir gently and wait for the reading to stabilize approximately 30 seconds depending on...

Page 12: ...p selection mode 3 Press MODE to toggle between the available pH bu er groups 4 Press HOLD ENTER to confirm the pH bu er group Note if Pb is selected measurement mode will begin If USA or nSt is selec...

Page 13: ...e displayed after a single point calibration is completed Recalibrate using a minimum of 2 points Calibration values are successfully stored if the ISE Ion Selective Electrode slope is within the spec...

Page 14: ...Adjustment solution if required Stir the solution gently with the electrode Press the CAL key to begin the calibration mode 2 The display will show CA to indicate the calibration mode momentarily fol...

Page 15: ...easurement mode If the calibration is not successfully stored in the memory an error message Er3 will be displayed This occurs when the slope is lower than 15mV decade or higher than 90mV decade 3 3 T...

Page 16: ...2 Without Temperature Probe no ATC If a temperature probe is not used the meter will compensate the pH response based on a temperature value that has been manually set or at the factory default of 25...

Page 17: ...erature 3 Dip the probes in the aqueous test sample Stir gently with the probes and wait for the reading to stabilize Note the reading Freeze the displayed if desired for details refer to Section 4 3...

Page 18: ...results store the ISE dry and the pH ORP probe bulb wet Store the pH ORP glass bulb in pH probe storage solution NEVER use deionized water for storage Wash probes with clean water after each use ISEs...

Page 19: ...alibrate c Replace electrode Er1 display Bu er value out of tolerance Use fresh pH bu er solution and recalibrate Ensure correct pH bu er group was selected Er2 display Single point calibration Perfor...

Page 20: ...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 C Resolution 0 1 C Accuracy 0 5 C Temperature Comp Automatic Manual 0 to 100 C Millivolt Range 500 to 500 mV R...

Page 21: ...ablets pH 4 0 50 tablets 3983A H Mini Bu er Tablets pH 7 0 50 tablets 3984A H Mini Bu er Tablets pH 10 0 50 tablets 3985A H Ion Selective Electrode Ammonia ISE 5 0043 Fluoride ISE 5 0048 Nitrate ISE 5...

Page 22: ...pecific purpose and will not be liable for any direct indirect incidental or consequential damages LaMotte Company s total liability is limited to repair or replacement of the product The warranty set...

Page 23: ...23...

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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