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OPERATING INSTRUCTIONS

OAKTON

®

35631-00

Portable Waterproof 

pH/CON 300 Meter

R1 Printed in the U.S.A. 10/00

pH/Conductivity/

°

C/

°

F Meter

pH/CON 300 Series

WATERPROOF

MODE

HOLD

ENTER

RANGE

ON

OFF

CAL

MEAS

SETUP

ATC

READY

MEAS

 C

µ

S

00702-89

IP

67

16. Warranty

OAKTON warrants this meter to be free from significant deviations in material 
and workmanship for a period of three years from date of purchase. OAKTON
warrants this probe to be free from significant deviations in material and 
workmanship for a period of six months from date of purchase. If repair or 
adjustment is necessary and has not been the result of abuse or misuse within 
the warrantied time period, please return—freight prepaid—and correction will 
be made without charge. OAKTON alone will determine if the product problem 
is due to deviations or customer misuse.

Out-of-warranty products will be repaired on a charge basis.

17. Return of items

Authorization must be obtained from our Customer Service Department before
returning items for any reason. When applying for authorization, please include
data regarding the reason the items are to be returned. For your protection, items
must be carefully packed to prevent damage in shipment and insured against possi-
ble damage or loss. We will not be responsible for damage resulting from careless or
insufficient packing. A restocking charge will be made on all unauthorized returns.

NOTE:

We reserve the right to make improvements in design, construction, and
appearance of products without notice.

Summary of Contents for 35631-00

Page 1: ...me period please return freight prepaid and correction will be made without charge OAKTON alone will determine if the product problem is due to deviations or customer misuse Out of warranty products w...

Page 2: ...ady indicator auto endpoint function 28 P3 2 Selecting number of pH calibration points 29 P3 3 Selecting C or F 30 6 5 Program 4 0 Resetting to factory default settings pH 31 6 6 Program 5 0 Viewing p...

Page 3: ...splay also shows error messages keypad functions and program functions mS ATC READY MEAS CAL HOLD ERR F SETUP ON OFF C S K pH mV pH ppt ppm 2 1 Primary display Secondary display 3 2 21 20 14 17 16 15...

Page 4: ...ions In advanced set up mode Press CAL MEAS to return to main menu from sub menus Press CAL MEAS again to return to measurement mode from main menu ENTER Press to confirm values in Calibration mode an...

Page 5: ...To connect the pH electrode 1 Slide the BNC connector of the probe over the BNC connector socket on the meter Make sure the slots of the connector are in line with the posts of the socket Rotate and...

Page 6: ...eplaced on a point by point basis in pH and on a range by range basis in conductivity or TDS For example pH if you previously calibrated your meter at pH 4 01 7 00 and 10 01 and you recalibrate at pH...

Page 7: ...each of the ranges you are measuring All new calibration data will over ride existing stored calibration data for each measuring range you calibrate If you are measuring in ranges near to or greater t...

Page 8: ...and 1 If necessary press the MODE key to select TDS mode See figure 2 Rinse the probe with de ionized water or a rinse solution then rinse with a small amount of calibration standard 3 Dip the probe i...

Page 9: ...nal reading To exit this program without confirming the temperature calibration value DO NOT press ENTER in step 7 Press CAL MEAS instead 5 Measurement To take readings 1 Rinse the pH electrode with d...

Page 10: ...y to toggle between conductivity and pH readings Taking Conductivity or TDS Measurements ATC READY MEAS C S A A 5 2 B B Immerse probe beyond upper steel band Notes You can use the conductivity TDS man...

Page 11: ...h time you turn the meter off 5 4 From measurement mode 1 Press the Mode key to select conductivity measurement mode 2 Press Setup key to enter Set Up mode 3 Press the and keys to scroll through subgr...

Page 12: ...E C CAL F F The meter will now compensate readings for the manually set temperature Notes To exit this program without confirming the manual temperature compensation value DO NOT press ENTER in step...

Page 13: ...onductivity TDS calibration data R2 R2 0 0 199 9 S 10 0 99 9 ppm P5 3 View conductivity TDS calibration data R3 R3 0 1999 S 100 999 ppm P5 4 View conductivity TDS calibration data R4 R4 0 00 19 99 mS...

Page 14: ...electrode parameters for diagnostic purposes It lets you view P2 1 Electrode offset P2 2 Electrode slope SETUP pH A A SETUP mV pH B B 6 3 SETUP pH C C From measurement mode 1 Press the Mode key to se...

Page 15: ...See figure 5 Press the and keys to select the configuration you require OFF switches the READY indicator off ON switches the READY indicator on ON and HOLD together switches the auto endpoint feature...

Page 16: ...the ENTER key See figure 5 Press the and keys to toggle between NO and YES NO retains current settings YES resets to factory default settings 6 Press the ENTER key to confirm selection and to return...

Page 17: ...to your calibration 6 7 mS SETUP S ppt ppm A A SETUP K B B From measurement mode 1 Press the Mode key to select conductivity or TDS measurement mode 2 Press the Set up key to enter Set Up mode See fig...

Page 18: ...eter 7 1 See figure 5 Press the and keys to select the configuration you require ON switches the READY indicator on OFF switches the READY indicator off ON and HOLD together switches the auto endpoint...

Page 19: ...solution See Appendix 2 on page 49 for information on how to calculate the TDS factor 7 Press the and keys to select your calculated TDS conversion factor 8 Press the ENTER key to confirm selection a...

Page 20: ...e temperature coefficient is the amount of change in conductivity per degree of temperature it is expressed in percent per C or F Entering the exact temperature coefficient of your solution lets you a...

Page 21: ...ode into the heated solution for about 10 minutes Allow the electrode to cool in some unheated KCl solution Protein deposits prepare a 1 pepsin solution in 0 1 M of HCl Set the electrode in the soluti...

Page 22: ...nstead of performing this reactivation procedure 1 Dip or stir the pH electrode in alcohol for 5 minutes 2 Leave the electrode in tap water for 15 minutes 3 Dip and stir the electrode in concentrate a...

Page 23: ...al LCD Operating temperature 0 to 50 C 32 to 122 F Power four 1 5 V AAA batteries included Battery life 200 hours continuous use Probe connectors pH mV BNC connector Conductivity TDS Temperature notch...

Page 24: ...00654 00 pH 4 01 calibration buffer 1 pint WD 00654 04 pH 7 01 calibration buffer 1 pint WD 00654 08 pH 10 01 calibration buffer 1 pint WD 00654 12 pH 12 45 calibration buffer 1 pint Model No Solution...

Page 25: ...in the above formula The result should be the TDS value 12 Appendix 1 Conductivity to TDS Conversion Factors 1 Factor the conductivity to ppm TDS conversion factor Multiply conductivity by this factor...

Page 26: ...the meter readings 15 Appendix 4 Meter factory default settings Resetting the meter to factory default settings clears all calibration data and most other setup functions you might have changed The fo...

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