Taylor K-6510

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REAGENTS: 1 x R-0834 pH Soaker Solution 2 x R-1099-04 Buffer Solution pH 4.0 2 x R-1099-07 Buffer Solution pH 7.0 2 x R-1099-10 Buffer Solution pH 10.0

COMPONENTS: 1 x 5842 Instruction 1 x 6510 Meter, TechProII TM Model TH1, 0-14

CAUTION: When this instrument is exposed to extreme heat or cold, reading stability is affected. Allow plastic case to cool or warm to stabilize reading. Failure to do so will void warranty (see Temperature Extremes).

WARNING: pH sensor must be hydrated at all times with R-0834 pH Soaker Solution. If R-0834 pH Soaker Solution is not available a strong KCl solution, a pH 4.0 buffer, or a saturated solution of table salt and tap water may be used temporarily. Warranty void if sensor is not properly maintained. pH Measurement

1. Remove pH sensor protective plug on top of instrument and rinse sample well three times with sample to be measured.
2. Refill sample well with sample to be measured.
3. Press pH key to read pH and/or temperature.
4. Rinse sample well three times with R-0834 pH Soaker Solution. Cover pH sensor with R-0834 pH Soaker Solution and replace pH sensor protective plug. Instrument Calibration

NOTE: For calibration, buffer solutions should be approximately room temperature (25 degrees C/77 degrees F).

1. Remove ZERO CAL and GAIN CAL cap plugs on bottom of instrument.
2. Remove pH sensor protective plug on top of instrument and rinse sample well three times with R-1099-07 Buffer Solution pH 7.0.
3. Refill sample well with R-1099-07 Buffer Solution pH 7.0.
4. While pressing the pH key, adjust the ZERO CAL control with finger until display reads 7.0.
5. Rinse sample well three times with either R-1099-04 Buffer Solution pH 4.0 or R-1099-10 Buffer Solution pH 10.0. NOTE: If pH of sample will be above pH 7.0, use R-1099-10 Buffer Solution pH 10.0. If pH of sample will be below pH 7.0, use R-1099-04 Buffer Solution pH 4.0.
6. Refill sample well with selected buffer solution.
7. While pressing the pH key, adjust the GAIN CAL control with finger until display agrees with selected buffer solution. NOTE: If meter will not calibrate, the sample well needs additional rinsing or fresh buffer solution, or the pH sensor is bad and needs to be replaced.
8. Replace ZERO CAL and GAIN CAL cap plugs.
9. Rinse and cover pH sensor with R-0834 pH Soaker Solution and replace pH sensor protective plug.

Changing from Centigrade to Fahrenheit NOTE: Degrees F to degrees C is the reverse.

1. Dry instrument THOROUGHLY.
2. Remove the 4 bottom screws and carefully open instrument.
3. Locate dip switch labeled "TEMP COMP" on the circuit board.
4. Set switch number 4 to the off position.
5. Carefully turn instrument over and press the pH key. The displayed reading will be in Fahrenheit (although "degrees F" will not be shown).
6. Replace bottom, ensuring the sealing gasket is installed in the groove of the top half of the case. Tighten screws securely.

Battery Replacement

1. Dry instrument THOROUGHLY.
2. Remove the 4 bottom screws and carefully open instrument.
3. Carefully detach battery from circuit board. Replace with 9 volt alkaline battery.
4. Replace bottom, ensuring the sealing gasket is installed in the groove of the top half of the case. Tighten screws securely. Temperature Extremes Solutions in excess of 71 degrees C (160 degrees F) should not be placed in the sample well; this may cause damage. The pH sensor may fracture if the TH1 Meter temperature is allowed to be below -10 degrees C (14 degrees F). Care should be exercised not to exceed rated operating temperature. Leaving the TH1 Meter in a vehicle or storage shed on a hot day can easily subject the instrument to over 66 degrees C. (150 degrees F). This will void the warranty. Cleaning pH Sensor The unique pH sensor in your TH1 is a nonrefillable combination type which features a porous liquid junction. It should not be allowed to dry out.

If it does, the sensor can sometimes be rejuvenated by first cleaning the sensor well with a liquid spray cleaner such as WindexTM or FantasticTM and rinsing well. Do not scrub or wipe the pH sensor. Then use one of the following methods:

1. Pour a HOT salt solution approximately 60 degrees C (140 degrees F), preferably potassium chloride (KCl) solution-- HOT tap water with table salt (NaCl) will work fine--in the sensor well and allow to cool. Retest. OR
2. Pour DI water in the sensor well and allow to stand for no more than 4 hours (longer can deplete the reference solution and damage the glass bulb). Retest. If neither method is successful, sensor must be replaced. "Drifting" can be caused by a film on the pH sensor bulb. Spray a liquid cleaner such as WindexTM or FantasticTM into the sensor well to clean it. The sensor bulb is very thin and delicate. Do not scrub or wipe the pH sensor. pH Sensor Replacement Order model RPG. Include the model and serial number of your instrument to ensure receiving the proper type. Complete installation instructions are provided with each replacement sensor.