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Related Manuals for Hach PHC725
Summary of Contents for Hach PHC725
- Page 1 DOC022.53.80432 PHC725 05/2021, Edition 2 User Manual...
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Page 3: Table Of Contents
Table of Contents Section 1 Product overview ................. 3 Section 2 Specifications ..................3 Section 3 Safety information ................4 3.1 Intended use ....................... 4 3.2 Use of hazard information ..................4 3.3 Precautionary labels ..................... 5 3.4 Product hazards ....................5 Section 4 Preparation for use ................ - Page 4 Table of Contents...
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Page 5: Section 1 Product Overview
Section 1 Product overview The Intellical PHC725 pH probes are digital, combination electrodes that measure the pH of water samples. The probe gives fast, stable, and accurate measurements in samples of low ionic strength (LIS). The probes use the Red Rod technology and a saturated KCl electrolyte for high performance. -
Page 6: Section 3 Safety Information
Specifications Details Sodium (alkalinity) error <0.3 pH at pH 13 in 0.1 M NaOH Temperature accuracy ±0.3 °C (±0.54 °F) Temperature sensor type 30 kΩ NTC thermistor Operating temperature –10 to 100 °C (14 to 212 °F) Storage temperature 5 to 40 °C (41 to 104 °F) Minimum immersion depth 14 mm (0.55 in.) Body material Glass... -
Page 7: Precautionary Labels
3.3 Precautionary labels Read all labels and tags attached to the instrument. Personal injury or damage to the instrument could occur if not observed. A symbol on the instrument is referenced in the manual with a precautionary statement. Electrical equipment marked with this symbol may not be disposed of in European domestic or public disposal systems. - Page 8 7. Make sure that the meter has the correct date and time settings. The service-life time stamp in the probe comes from the date and time settings in the meter. Note: Some meters automatically open the date and time settings when the meter starts for the first time, or after battery replacement.
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Page 9: Section 5 Calibration
Figure 3 Probe position during use 1 Filling hole 3 Level of calibration solution or sample 2 Level of electrolyte filling solution Section 5 Calibration The procedure that follows is applicable to meters that can connect to Intellical pH probes. Refer to the applicable meter documentation for meter operation and probe-specific settings. -
Page 10: Calibration Procedure
5.2 Calibration procedure 1. Go to the 2. Prepare or pour 3. Open the filling 4. Rinse the probe calibrate menu. the pH buffer hole. with deionized water. Select the probe, if solutions in different Dry the probe with a applicable. -
Page 11: Section 6 Sample Measurement
Section 6 Sample measurement The procedure that follows is applicable to meters that can connect to Intellical pH probes. Refer to the applicable meter documentation for meter operation and probe-specific settings. 6.1 Sample requirements N O T I C E Make sure that the sample type is compatible with the probe, or probe damage can occur. -
Page 12: Section 7 Verify The Calibration
5. Shake the probe 6. Stir gently, then from side to side to read the pH value of refresh the reference the sample. The junction and remove display shows the air bubbles. temperature- compensated pH Note: Be careful to not value when the hit the beaker and reading is stable. -
Page 13: Section 8 Maintenance
5. Put the probe in 6. Shake the probe 7. Stir gently, then the pH buffer from side to side to read the pH value of solution with the refresh the reference the buffer solution. sensor and junction and remove The meter accepts reference junction air bubbles. -
Page 14: Fill The Probe
Table 1 Cleaning solution (continued) Contamination Cleaning solution Active component Soak time Proteins Electrode cleaning solution Pepsin in HCl 3 hours maximum for proteins/organic contamination Wastewater and Electrode cleaning solution, Sodium hypochlorite 5–10 minutes organic compounds extra strong Blockage of porous Electrode cleaning solution Thiourea 3 hours with stirring... -
Page 15: Add Kcl Crystals To The Probe
8.3 Add KCl crystals to the probe The filling solution in the probe contains crystals of potassium chloride (KCl) that keeps the filling solution saturated with KCl. When the sample temperature is more than 60 °C (140 °F), more crystals are necessary to keep the solution saturated with KCl. Add more KCl crystals when the level of crystals above the glass bulb is less than 0.5 cm (0.2 in.), or when the sample temperature is more than 60 °C (140 °F). -
Page 16: Replace The Filling Solution
Figure 6 Add KCl crystals to the probe 8.4 Replace the filling solution Replace the filling solution and KCl crystals when one of the conditions that follow occurs: • The filling solution becomes contaminated. • The KCl crystals in a probe do not move freely through the liquid when the probe is inverted. 1. -
Page 17: Soak Procedure For Dry Probes
6. Add new KCl crystals to the probe until there is approximately 0.5 cm (0.2 in.) of crystals above the glass bulb. Refer to Figure 6 on page 14. 7. Fill the probe with new filling solution. Refer to Fill the probe on page 12. -
Page 18: Section 9 Troubleshooting
Section 9 Troubleshooting Keep the probe clean and in the recommended storage solution when not in use for the best accuracy, stabilization time and life of the probe. Problem Possible cause Solution The glass sensor is dirty. Clean and condition the probe. Refer to Clean the probe on page 11. -
Page 19: Section 10 Consumables
Section 10 Consumables Note: Product and Article numbers may vary for some selling regions. Contact the appropriate distributor or refer to the company website for contact information. Description Quantity Item no. Electrode filling solution, saturated KCl 59 mL 25118026 KCl crystals 15 g S21M001 Electrode cleaning solution for regular maintenance... -
Page 20: Accessories
10.1 Recommended standards (continued) Description Unit Item no. pH 6.865 ± 0.010 at 25 °C (77 °F) 500 mL S11M003 pH 7.000 ± 0.010 at 25 °C (77 °F) 500 mL S11M004 pH 9.180 ± 0.010 at 25 °C (77 °F) 500 mL S11M006 pH 10.012 ±... - Page 22 Tel. +49 (0) 2 11 52 88-320 SWITZERLAND Fax (970) 669-2932 Fax +49 (0) 2 11 52 88-210 Tel. +41 22 594 6400 orders@hach.com info-de@hach.com Fax +41 22 594 6499 www.hach.com www.de.hach.com © Hach Company/Hach Lange GmbH, 2014, 2021. All rights reserved.