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Summary of Contents for Apera Instruments SX751
- Page 1 SX751 Portable pH/Conductivity/DO/ORP Meter User Manual APERA INSTRUMENTS, LLC aperainst.com - 1 -...
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Page 2: Table Of Contents
Table of Contents Brief Instruction ....................... - 3 - Technical Specifications....................- 4 - About the Meter ......................- 5 - What’s in the kit ......................- 7 - Preparation ........................- 8 - pH Measurement ......................- 9 - pH Electrode ........................ -
Page 3: Brief Instruction
Scan the QR code below to watch the tutorial video on Youtube. Brief Instruction Thank you for choosing Apera Instruments SX751 Portable pH/DO/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: Technical Specifications
Technical Specifications 2.1 pH Measurement range (-2.00 to 19.99) pH Resolution 0.1/0.01 pH Accuracy Meter: ±0.01pH; Overall: ±0.02pH Input current ≤2×10 -12 A Input impendance ≥1×1012 Ω Stability ±0.01 pH/3h Temp. compensation range (0 to 100) ˚C (automatic) 2.2 ORP(mV) Measurement range (mV/ORP/EH) -1999 mV to 0 to 1999mV Resolution... -
Page 5: About The Meter
Response time ≤30s (25˚C, 90% response) Temp. compensation range (0 to 45) ˚C (automatic) Salinity compensation range (0 to 45) ppt (automatic) Barometric pressure compensation range (66 to 200) kPa (manual) Automatic calibration Air saturated by water; water saturated by air Electrode type Polarographic 2.5 Other Technical Parameters... - Page 6 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 — Saved data to be recalled; ④...
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Page 7: What's In The Kit
5 seconds, CLr will show up for 2 seconds, meaning that all the saved data have been eliminated. Then the meter will return to measurement mode. What’s in the kit SX751 pH/ORP/Conductivity/DO 201T-S plastic pH/ATC three-in- 301Pt-S plastic ORP... -
Page 8: 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. - 8 -... -
Page 9: 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 10: Notes About Ph Calibration
6.2.3. Rinse off the pH electrode in pure water and remove excess water, then insert it into the pH4.00 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 11: Sample Test
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. • There is a significant temperature difference between the test sample and the buffer solution. -
Page 12: 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 13 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 14: Cleaning Ph Electrode
Temperature unit ˚C/˚F setting (P4) 6.6.4 (a) Short press in P3 to enter P4, see picture (4-5). (b) Press to choose temperature unit: ˚C or ˚F. (c) Press to enter next parameter setting or press to confirm and return to measurement mode. 6.6.5 Backlight display time setting (P5) (a) Short press... -
Page 15: The Self-Diagnose Information
2) For tough contaminants, soak the electrode in Apera electrode cleaning solution (AI1166) for at least minutes. Then use a soft brush to remove the contaminants. Afterwards, soak the electrode in 3M KCL soaking solution for at least 2 hours. Rinse it off, then re-calibrate the tester before using again. -
Page 16: Notes About Ph
6.9 Notes about pH 1) Never store pH electrode in pure water as it will damage the electrode. Always store the electrode in 3M KCL soaking solution (AI1107). 2) If you find any air bubble in the glass bulb of the pH sensor, simply shake the probe with force for a few times to remove it. -
Page 17: Clean And Activate Orp Electrode
7.3 Clean and activate ORP electrode After the electrode has been used over a long period of time, the platinum surface will get polluted which causes inaccurate measurement and slow response. Please refer to the following methods to clean and activate ORP electrode: •... -
Page 18: Sample Test
stays on screen, short press again to finish calibration. 1413 µS will start flickering and then a flickering will show up, and the meter will return to measurement mode. shows up at the lower left corner, indicating a successful conductivity calibration. If the measurement is not stable, you can perform the calibration once again. -
Page 19: Parameter Setting
1413 μS/cm. Use the equipped 2301T-S conductivity electrode (K = 1.0). Please choose the calibration solution according to the Table (6-1). 2) The conductivity electrode has been calibrated before meter leaving factory. In general, user can directly use it. 3) We recommend calibrating the electrode once every month. It is necessary to perform calibration when replacing a new conductivity electrode. - Page 20 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 21: Temperature Compensation Coefficient
(c) Press to enter the next parameter setting or press to return to measurement mode. (d) If you need to do calibration for other conductivity electrode whose constant is not 1.0, e.g. conductivity electrode with constant 10.3, you should enter constant setting P2 to set the constant to be “10”, then enter P5 mode and set the constant to be 10.3. -
Page 22: Notes About Conductivity Parameter Setting
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. When more than one conductivity parameter is changed, only one code will be displayed. You need to enter the parameter setting and check the settings content or restore the meter to factory default setting and set the needed parameters again. -
Page 23: Do Calibration (Saturated Oxygen)
1 — DO500 DO electrode 2 — Calibration sleeve cap 3 — Calibration sleeve 4 — Water stored sponge 5 — Calibration sleeve bottom lid 6 — Temperature electrode 7 — Membrane cap 8 — Cathode (gold) 9 — Anode (silver) 10 —... -
Page 24: Notes About Do Measurement
9.3.2 Measurement DO in static water Power on the meter. Place the DO electrode into water. The water surface level should be higher than the location of the temperature electrode. The angle for the electrode and water should be 45° to 75°. Keep swirling the electrode in water slowly (>5cm/s) for 1 to 5 minutes. -
Page 25: Zero Oxygen Calibration
9.5.3 Clean the gold cathode When the gold cathode is contaminated, use the polishing paper (DO504) to lightly wipe the gold cathode (along the arc of the gold surface); clean the gold surface with a clean tissue or kimwipe afterwards; rinse off the electrode with distilled water, then shake off excess water;... -
Page 26: Salinity Calibration
1) Polarize the meter for 15 minutes, and then perform the saturated oxygen calibration according to the 9.2. 2) Place the electrode into zero-oxygen water, press to enter calibration mode. When the stabilized reading is 0.02 ppm to 0.15 ppm after 5 minutes, press again to finish the calibration, then flashing 0.0% will show up, the calibration will be finished in several seconds and 0.00 ppm will show up. -
Page 27: Parameter Setting
9.9 Parameter Setting 9.9.1 DO parameter settings (Chart 4-1) Prompt Mark Parameter Setting Items Code Parameter 0.01/0.1(mg/L and ppm) Resolution selection 0.1/1(%) Salinity calibration Barometric pressure setting Temperature unit setting ˚F/˚C Backlight display time setting 0-1-3-6 min Auto power off time setting 0-10-20 min Restore to producer setting OFF-On (shut-set) - Page 28 9.9.4 Barometric pressure setting (P3) ) In P2, short press to enter P3, the screen displays a barometric pressure measurement value set earlier (unit is kPa), such as 101.3 kPa, shown as picture (4-4). (b) Press to adjust according to standard barometric pressure value, and long press them to quickly change the value.
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Page 29: 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, LLC, any malfunctioned or damaged product attributable to responsibility of APERA INSTRUMENTS, LLC for a period of THREE YEARS (SIX MONTHS for the electrode) from the delivery. -
Page 30: Appendix
11 Appendix Appendix 1 Content of Saturated Oxygen in Water at Different 11.1 Temperature Temperature Temperature Temperature ˚C mg/L ˚C mg/L ˚C mg/L 14.64 9.86 7.30 14.22 9.66 7.18 13.82 9.46 7.07 13.44 9.27 6.95 13.09 9.08 6.84 12.74 8.90 6.73 12.42 8.73... - Page 31 11.2 Appendix 2 Content of Saturated Oxygen at Different Barometric pressure Barometric pressure Dissovled Oxygen Concentration (mg/L) mmHg 15˚C 25˚C 35˚C 100.00 9.94 8.14 6.85 100.13 9.96 8.15 6.86 100.26 9.97 8.16 6.87 100.40 9.98 8.17 6.88 100.53 9.99 8.18 6.89 100.66 10.00...
- Page 32 16000 4878 63.38 5.16 6000 6500 1982 80.03 6.52 17000 5183 62.58 5.10 7000 2134 78.56 6.40 18000 5488 61.79 5.03 APERA INSTRUMENTS, LLC Address: 6656 Busch Blvd, Columbus Ohio 43229 Tel: 1-614-285-3080 Email: info@aperainst.com Website: aperainst.com - 32 -...
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