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Section 1 Product overview

The Intellical PHC281 series pH probes are digital, combination electrodes that measure the pH of
water samples. The probes are refillable and have a built-in temperature sensor. The probes have
good performance in low ionic strength (LIS) samples (e.g., deionized, reverse osmosis, distilled) and
other clean waters (specific conductance less than 100 µS/cm to ultrapure). The open reference
junction lets the electrolyte flow at a high rate for optimum electrical connection with the sample. The
open reference junction does not become clogged with suspended solids if used in dirty applications.
A 59-mL bottle of 2.44 M KCl reference electrolyte filling solution is supplied with the probe. Refer to 

Figure 1

.

Note: Do not use the probe for measurements in organic solvents.

Figure 1  Probe overview

1   

Probe soaker bottle with storage solution

5   

Cable

2   

Glass bulb, reference junction and
temperature sensor

6   

Probe soaker bottle holder

3   

Filling-hole plug

7   

Electrode filling and storage solution

4   

Protective tape and filling hole

8   

Dispensing cap

Section 2 Specifications

Specifications are subject to change without notice.

Specifications

Details

Probe type

Digital combination pH probe with refillable electrolyte and built-in
temperature sensor

pH range

0 to 14 pH

pH accuracy

±0.02 pH

Reference type

Ag/AgCl

Reference junction

Open

Slope

–59 mV/pH (90 to 110% at 25 °C (77 °F) per Nernstian theoretical
value)

Isopotential point

0 (±30) mV at 7.0 (±0.5) pH

Sodium (alkalinity) error

–0.6 pH at pH 12.6 in 1 M NaOH

English

   

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Содержание PHC281

Страница 1: ...DOC022 53 80024 PHC281 05 2021 Edition 3 User Manual...

Страница 2: ......

Страница 3: ...ration notes 7 5 2 Calibration procedure 8 Section 6 Sample measurement 9 6 1 Sample measurement notes 9 6 2 Sample measurement procedure 9 Section 7 Verify the calibration 10 7 1 Verification procedu...

Страница 4: ...Table of Contents 2...

Страница 5: ...filling solution is supplied with the probe Refer to Figure 1 Note Do not use the probe for measurements in organic solvents Figure 1 Probe overview 1 Probe soaker bottle with storage solution 5 Cable...

Страница 6: ...oper use or wear Certifications CE FCC ISED Section 3 Safety information 3 1 Intended use The Intellical probes are intended for use by individuals who measure water quality parameters in the laborato...

Страница 7: ...e protective tape from the filling hole of new probes A probe with a blocked filling hole will not operate correctly New probes are filled with electrolyte filling solution and have a soaker bottle th...

Страница 8: ...Figure 2 Remove the protective tape 6 English...

Страница 9: ...ore pH units apart For a one point calibration use a pH buffer near the expected sample pH Use the default calibration options or change the options in the probe settings menu Use the single display m...

Страница 10: ...the probe in the first pH buffer solution Make sure that the sensor and reference junction are fully in the solution Do not put the probe on the bottom or sides of the beaker 6 Shake the probe from s...

Страница 11: ...a point and when the meter is set to read at regular intervals The user must manually save each data point when the meter is set to read continuously Air bubbles below the sensor can cause a slow resp...

Страница 12: ...he verification menu The display shows the pH buffer solution to use for verification Note Menu name for HQd meters Run check standard 2 Prepare or pour the pH buffer solution into a beaker 3 Open the...

Страница 13: ...tion times Calibration errors Sample material stays on the probe 1 Rinse the probe with deionized water Use warm 35 45 C 95 113 F deionized water to remove storage solution that dries on the probe Dry...

Страница 14: ...maximum Proteins Electrode cleaning solution for proteins organic contamination Pepsin in HCl 3 hours maximum Wastewater and organic compounds Electrode cleaning solution extra strong Sodium hypochlo...

Страница 15: ...minutes in each solution 2 Rinse the probe with deionized water Blot dry with a lint free cloth 3 Calibrate the probe 8 5 Storage N O T I C E Probes can become permanently damaged if kept in a storag...

Страница 16: ...le properties cause slow stabilization or inaccurate measurements The sample absorbs carbon dioxide CO2 from the air which causes the pH value to slowly decrease in low ionic strength LIS or high puri...

Страница 17: ...ets 20 mL each 20 pkg 2770120 pH 10 01 buffer solution Singlet one use packets 20 mL each 20 pkg 2770220 pH 4 01 and pH 7 00 buffer solution kit Singlet one use packets 20 mL each 2 x 10 pkg 2769920 p...

Страница 18: ...stic colorless 80 pkg SM5010 Beaker 30 mL plastic red 80 pkg SM5011 Beaker 30 mL plastic yellow 80 pkg SM5012 Beaker 30 mL plastic blue 80 pkg SM5013 Beaker 30 mL plastic green 80 pkg SM5014 Beaker di...

Страница 19: ......

Страница 20: ...2932 orders hach com www hach com HACH LANGE GMBH Willst tterstra e 11 D 40549 D sseldorf Germany Tel 49 0 2 11 52 88 320 Fax 49 0 2 11 52 88 210 info de hach com www de hach com HACH LANGE S rl 6 ro...

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