Oakton pHTestr 1 Instruction Card

need replacing ER2 Wrong or bad buffer value (out of range) or the electrode is failing. Check buffers or replace electrode. Over range signal from voltage on a solution, the electrode is not contacting OR the solution, or the electrode is failing. Check solution or replace electrode. Waterproof pHTestr 1 and 2 Instruction Card IMPORTANT: Please read completely before using the Waterproof pHTestr 1 and 2. File this card for future reference. Before you Begin: Remove the cap from the bottom of the Testr to expose the electrode bulb and reference junction. DO NOT BE ALARMED if white crystals are present on the cap or electrode assembly. This is normal and will dissolve during the conditioning pre-soak. For the conditioning pre-soak, pour a small amount (about 1” deep) of electrode storage solution, pH 4 buffer or tap water into a small cup and soak the electrode for at least 30 minutes. If the electrode dries out between uses, re-condition by using this soaking procedure. Calibration: Calibration is necessary and should be done regularly, typically every day that the Testr is used. Some applications will need less frequent calibrations but this can only be determined by trial and error. Calibrating Waterproof pHTestr 1: 1. Turn the Testr on by pressing the ON/OFF button. 2. Dip 1/2 to 1" of the electrode into a pH 7.0 buffer for general pur- pose use, into pH 4.0 if your tests will be in acidic solutions, or into a pH 10 buffer if your tests will be in alkaline (or basic) solutions. If the tests will be in solutions closer to pH 7.0 than pH 4.0 or 10.0, even though acidic or basic, use pH 7 buffer for calibration. 3. Press the CAL button to enter the Calibrate (CA) mode. A ‘CA’ will flash on the display and then a pH value close to the pH buffer value will flash repeatedly. 4. After at least 30 seconds (about 30 flashes) press the HOLD/CON button to confirm the calibration. The display will show ‘CON’ and Waterproof Waterproof pHTestr 1 pHTestr 2 Range –1.0 to 15.0 pH Resolution 0.1 pH Accuracy ±0.2 pH ±0.1 pH Calibration At either pH 4.0; pH 4.0; 7.0 7.0; or 10.0 and 10.0 Automatic Temperature No Yes Compensation Auto-Buffer Yes Recognition Operating 0 to 50ºC (32 to 122ºF) Temperature ON/OFF, HOLD, CA (Calibrate) Functions and CO (Confirm display); Auto-off after 8.5 min. after last operation Three 1.5 V alkaline batteries (included). 24 hours continuous Power use (approx. 720 tests per battery set) 6.5”L x 1.5”Dia. (165 x 38mm) Dimensions unit only; 8.5” x 2.4” x 2.5” (216 x 61 x 64mm) boxed Weight 3.25oz./90g unit only; 4.5oz./125g boxed Specifications: Warranty: The waterproof pHTestr 1 and water- proof pHTestr 2 are warranted against defects in materials and workmanship for a period of 6 months from the date of purchase. If repair, adjustment or replacement is necessary and has not been the result of abuse or misuse within the 6 month period, please return the Testr—freight pre-paid—and correction will be made without charge. Out of warranty products will be repaired on a charge basis. Return of Items: Authorization must be obtained from your OAKTON Distributor before returning items for any reason. When applying for authorization, please include information regarding the reason the item(s) are to be returned. Note: We reserve the right to make improvements in design, construction and appearance of products without notice. Prices are subject to change with- out notice. 1 5 6 35624-02, -22 Printed in U.S.A. 1097-R3 1. Remove the Old Electrode For older testrs with 2 slots only 2. Replace the Electrode Small O-Ring (hidden) Rotate collar away from you Rubber Gripper Band Older testers may have only two slots. In this case, break off the two small tabs using a needle-nose pliers. Ribbed Collar Large O-Ring Large Tab Small Tab Insert Electrode Replacement Electrode 3. Tighten the Ribbed Collar Rubber Gripper Band Rotate collar towards you Self-Diagnostic Messages 806-31

buffer. Rinse the electrode with de-ionized water or tap water. Calibrating Waterproof pHTestr 2: 1. Turn the Testr on by pressing the ON/OFF button. 2. Dip 1/2 to 1” of the electrode into a pH 7.0 buffer. 3. Press the CAL button to enter the Calibrate (CA) mode. A ‘CA’ will flash on the display and then a pH value close to the pH buffer value will flash repeatedly. 4. After at least 30 seconds (about 30 flashes) press the HOLD/CON button to confirm the pH 7.0 cali- bration. The display will show ‘CO’ and switch back to a pH reading of the pH 7.0 buffer. Rinse the electrode with de-ionized water or tap water. No further cali- bration is needed if all measure- ments are expected to be between pH 6 and 8 for general purpose use. Repeat the calibration using pH 4.0 buffer if readings below pH 6 are expected, and repeat the calibration using pH 10.0 buffer if readings above pH 8 are expected. Perform three calibrations for maximum accuracy throughout the entire range. Possible Problems with Calibration: The most common problem is fail- ing to press the HOLD/CON button to enter the calibration. Pressing the CAL button instead will stop the flashing and resume measuring mode but will not enter the calibra- tion; the meter will not show the buffer value or measure accurately. Another problem is failing to allow the Testr to sample the pH buffer for at least 30 seconds prior to pressing the HOLD/CON button confirming the calibration. If the Testr does not get a long enough exposure to the buffer, a stable calibration point will not be reached and small errors can occur. The last common problem is a fail- ure to re-hydrate the electrode after it has dried out and before attempt- ing a calibration. A dry electrode will give fluctuating readings while it re-hydrates in a buffer, causing errors. pH Testing: 1. Remove cap from the electrode assembly and press the ON/OFF button to turn the Testr on. 2. Dip the electrode 1/2 to 1" into the test solution. Stir once and let the reading stabilize. 3. Note the pH or press HOLD/ CON button to freeze the reading. Press HOLD/CON again to release the reading. 4. Press ON/OFF to turn off Testr. If you do not press a button for 8.5 minutes the Testr will automati- cally shut off to conserve batteries. Maintenance: Rinse the electrode with de-ionized or tap water after each measurement to extend its useful life. In aggres- sive chemicals, dirty or viscous solu- tions, and solutions with heavy metals or proteins, take readings quickly and rinse electrode immedi- ately afterward. Periodic soaks in warm pH 4 buffer will help remove any contaminants that may ruin electrodes. If possible keep a small piece of paper or sponge in the elec- trode cap—moistened with clean water or electrode storage solution (NOT DE-IONIZED WATER)—and close the cap over the electrode. The useful life of a Testr is entirely dependent on the care the electrode and meter get. BUT it must be expected that in applications where the electrode is exposed to materials that contaminate the electrode refer- ence junction, electrode life will be shortened. This is not a defect in the electrode but a NORMAL EVENT. When you are ready for a new electrode, see “Electrode Replacement” on page four. Changing the batteries: Under the cap with the lanyard loop is the battery compartment. WITH DRY HANDS firmly grip the cap and the testr body. Twist the cap counter clockwise (see illustration, pg. 5). The cap must be on tight to ensure water tightness and will require effort to loosen, but this can be done routinely if twisted slowly while maintaining a firm grip. Remove batteries and replace with new ones noting the polarity. Replace the cap and tighten until all the black O-ring is under the cap and the lanyard loop is lined up with the face plate. Electrode Replacement: One of the benefits of selecting the Waterproof pHTestr is that you can now replace the electrode module when needed and keep the meter portion of the Testr. When the Testr fails to calibrate, gives fluctuating readings in buffers, or shows error messages ‘E2’ or ‘OR’ in a buffer, and the procedures in the Maintenance section on panel 3 do not help, you need to change the electrode. See diagrams on panel 5 for further instructions. 1. WITH DRY HANDS firmly grip the ribbed collar of the tester with the electrode facing you and slowly twist counter clockwise. Slow, steady twisting, along with a firm grip, will loosen the collar. 2. Unscrew the ribbed electrode module collar completely and SAVE IT! Save the O-ring in the collar also. Pull the electrode module straight out from the bot- tom of the Testr. 3. Align the four tabs on the new module so they match the four slots on the testr. (see diagram 2 on page 5). NOTE: Older testers may have only two slots. In this case, break off the two small tabs using a needle-nose pliers (see diagram 3 on page 5) 4. GENTLY push the module onto the bottom end to fully seat it in position. Put the smaller O-ring all the way into the ribbed collar. Then push the collar on over the module and thread it into place by firmly twisting it clockwise until the larger O-ring that is close to the face plate dis- appears under the ribbed elec- trode module collar. 3 2 4