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Summary of Contents for Apera Instruments SX731
- Page 1 SX731 Portable pH/Conductivity/ORP Meter User Manual APERA INSTRUMENTS (Europe) GmbH aperainst.de - 1 -...
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Page 2: Table Of Contents
Table of Contents Brief Instruction ......................- 3 - Technical Specifications ....................- 3 - About the Meter ......................- 5 - What’s in the kit ......................- 6 - Preparation ......................... - 7 - pH Measurement ......................- 8 - pH Electrode ........................ -
Page 3: Brief Instruction
Brief Instruction Thank you for choosing Apera Instruments SX731 Portable pH/conductivity/ORP Meter (will be called “the meter” in short in the following content). Before using the meter, please read this instruction manual carefully in order to help you properly use and maintain it. - Page 4 2.2 ORP (mV) Measurement range (mV/ORP/EH) -1999 mV to 0 to 1999mV Resolution Accuracy Meter: ±0.1% FS, Overall: ±15mV 2.3 Conductivity Conductivity: (0.00 to 19.99) μS/cm, (20.0 to 199.9) μS/cm (200 to 1999) μS/cm, (2.00 to 19.99) mS/cm Measurement range (20.0 to 199.9) mS/cm TDS: (0 to 100) g/L;...
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Page 5: About The Meter
About the Meter 3.1 Screen Display ① —— Parameter icon ② —— Measurement value ③ —— Serial number and icon as measurement to be saved and recalled and indication icon for special states. M+ — measurement value to be saved; RM —... -
Page 6: What's In The Kit
Then the meter will return to measurement mode. What’s in the kit 201T-S plastic pH/ATC three-in-one 301Pt-S plastic ORP SX731 pH/ORP/Cond. meter *1 combination electrode *1 combination electrode *1 pH standard buffer solution (pH 2301T-S plastic conductivity 1413μS/cm conductivity standard... -
Page 7: Preparation
Preparation What you need in addition to what’s in the kit: Pure water (RO, distilled or deionized water) for rinsing off the electrode. - 7 -... -
Page 8: Ph Measurement
pH Measurement Short press to turn on the meter. Connect 201T-S pH electrode to the meter (See Section 5 for connection tutorial). The meter will automatically enter pH measurement mode. 6.1 pH Electrode The meter comes with the 201T-S 3-in-1 combination electrode with a built-in temperature sensor, which enables automatic temperature compensation. -
Page 9: Notes About Ph Calibration
6.2.3. Rinse off the pH electrode in pure water and remove excess water, then insert it into the pH 4.00 buffer solution, make a quick stir and then hold it still. When the reading is stabilized and stays on screen, short press again to finish the 2 point calibration. -
Page 10: Sample Test
In the following cases, the meter must be re-calibrated: • The electrode hasn’t been used for a long time or a new electrode is connected. • After measuring strong acid (pH<2) or strong base (pH>12) solutions. • After measuring fluoride-containing solution and strong organic solution. •... -
Page 11: Parameter Setting
Raw meat LabSen 761, LabSen 763 Micro sample testing LabSen 241-6, LabSen 241-3 Cosmetics, skincare products LabSen 851-1, LabSen 851-S Soil LabSen 551, LabSen 553 Solid or semi-solid samples (cheese, dough, fruits, meat LabSen 251, LabSen 751, LabSen products, etc.) Strong acid solutions, HF containing solutions (HF LabSen 831 concentration<1%) - Page 12 6.6.1 pH buffer solution series selection (P1) (a) Long press , meter enters P1 mode: see picture (4-2). (b) Press to choose buffer solution series: (U.S.A series) — 1.68, 4.00, 7.00, 10.01and 12.45 pH (NIST series) — 1.68, 4.01, 6.86, 9.18 and 12.45 pH (China series) —...
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Page 13: Cleaning Ph Electrode
6.6.5 Backlight display time setting (P5) (a) Short press in P4 to enter P5, see picture (4-6). (b) Press to choose the time of backlight auto off: 0min, 1min, 3min or 6min. The backlight will be closed if choosing 0 min. (c) Press to enter next parameter setting or press to confirm... -
Page 14: The Self-Diagnose Information
3) For other special contaminants, refer to the table below: Contamination Cleaning Solution Inorganic metal oxide Dilute acid less than 1mol/L Organic lipid, protein containing samples Apera cleaning solution (AI1166) Resin macromolecule Dilute alcohol, acetone, ether Paints Dilute bleacher, peroxide 6.8 The Self-diagnose Information During usage, the following icons may show up on LCD. -
Page 15: Orp Measurement
3) pH electrode is technically a chemical battery. Every pH electrode will eventually die even if you don’t use it at all. The typical service life of a pH electrode is 1-2 years depending on how you use and maintain it. We recommend replacing your pH electrode after one year of use to ensure the best result. -
Page 16: Orp Parameter Setting
For organic or lipid pollutant, clean the platinum surface with detergent, then wash it in distilled • water, then submerge it in the soaking solution for 6 hours. • For heavily polluted platinum surface on which there is oxidation film, polish the platinum surface with toothpaste, then wash it in distilled water, then submerge it in the 3M soaking solution for 6 hours. -
Page 17: Sample Test
8.3 Sample Test Screw off the storage bottle. Rinse the electrode with pure water. Shake off excess water or blot-dry with clean tissue or kimwipe. Stir the electrode for a few seconds after it’s dipped into the sample solution and then hold it still. -
Page 18: Parameter Setting
Table (6-1) Measurement range 0.05 to 20 μS/cm 0.5 μS/cm to 200 mS/cm Electrode constant K = 0.1 (flow test) K = 1.0 12.88 mS/cm Calibration solution 84 μS/cm 84 μS/cm 1413 μS/cm 111.9 mS/cm Calibration icon Note: When you choose to use DJS-0.1-S pure water conductivity electrode (sold separately, K=0.1, no temperature sensor built in), you can use Manual Temperature Compensation mode: long press temperature value starts flickering, press to change the value of temperature and then... - Page 19 8.6.1 Conductivity calibration solution series selection (P1) (a) Press , meter enters P1 mode, see picture (6-3); (b) Press to choose the standard solution series: —U.S.A. series — China series (c) Press to enter the next parameter setting or press to return to measurement mode.
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Page 20: Temperature Compensation Coefficient
8.6.5 Constant calibration setting (P5), please refer to Section 8.5. (a) In P4, short press to enter P5, LCD display last calibration constant. For example, 0.96 cm shown as picture (6-7); (b) Press to change number when the number is flickering, and finish setting the constant which marked on the housing of conductivity electrode. -
Page 21: Notes About Conductivity Parameter Setting
Table-11 Temperature compensation coefficient of special solutions Solution Temperature compensation coefficient NaCl solution 2.12 %/°C 5% NaOH solution 1.72 %/°C Dilute ammonia solution 1.88 %/°C 10% hydrochloric acid solution 1.32 %/°C 5% sulfuric acid solution 0.96 %/°C 8.8 Notes about conductivity parameter setting When the content of conductivity parameter setting is different to the factory default setting, the correspondant code icon will appear on the upper right of LCD in measurement mode. -
Page 22: Limited Warranty
We warrant this instrument to be free from defects in material and workmanship and agree to repair or replace free of charge, at option of APERA INSTRUMENTS (Europe) GmbH, any malfunctioned or damaged product attributable to responsibility of APERA INSTRUMENTS (Europe) GmbH for a period of THREE YEARS (SIX MONTHS for the electrode) from the delivery.
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