Hach-lange PHC745 User Manual

User ManualDOC022.52.80435PHC745Safety informationW A R N I N G Chemical exposure hazard. Obey laboratory safety procedures and wear all of thepersona

Table 3 Custom buffer setsBuffer setvaluesOption DescriptionStd1 toStd5 1.09 pH—25 °C Pre-set temperature compensated buffer values.Note: It is neces

6. Select Acceptance Criteria and update the settings:Option DescriptionAcceptance Limits Sets the tolerance limits for check standard—0.005 pH (defau

Replace the filling solutionReplace the filling solution and KCl crystals (if applicable) when either occurs:• The filling solution becomes contaminat

1. Soak the probe tip in the 4.01 and 7.00 buffers each for 5 minutes.2. Rinse the probe with deionized water. Blot dry with a no-lint cloth.3. Calibr

Message or symptom Possible cause ActionSlow stabilization time Tape not removed from thefilling-holeRemove the tape.Contamination in the glasssensorC

Message or symptom Possible cause ActionDrifting/Inaccurate readings Contaminated glass bulb Clean the probe. Refer to Clean the probe on page 11.CO2

Consumables and accessories (continued)Description Quantity Item NumberStorage protector 1 LZW9161.99 LIS chamber assembly 1 5189900 Color-coded pH

Specifications DetailsStorage solution Saturated KClMinimum sample depth 18 mm (0.71 in.)Dimensions Body diameter: 12 mm (0.47 in.)Body length: 103 mm

6. For Red Rod probes, make sure that there is approximately 0.5 cm (0.2 in.) of KClcrystals in the filling solution in the probe. Refer to Table 1. F

3. Push down softly to return the sleeve junction to its initial position. Refer to Figure 3.Note: Be careful not to open the sleeve junction too much

• The calibration and sample measurement conditions must be as similar as possible(e.g., the temperature of the solution, the stir procedure, the stir

MeasurementBefore measurement:The probe must have the correct service-life time stamp. Set the date and the time in the meter before the probe is atta

6. Do steps 3–5again to make moremeasurements.7. Whenmeasurements aredone, put the probe instorage (refer to Storageon page 12).Run Check StandardTh

Table 2 Parameter-specific settingsSetting OptionsMeasurement Options• Resolution• Upper and lower range limitsCalibration Options• Buffer set• Buffe

6. If prompted, enter a name for the new method settings. Other changes made to thesettings of an existing method are automatically saved with the sam