Portable soil pH/Eh analyzer

1Product Specifications

IIInstructions for Use

1. Standard reference electrodeWhen using, first remove the rubber sleeve and let the electrode stand in a saturated KCl solution in a small plastic bottle for 1-2 hours;

2. Indicate that the electrode probe should be removed before reuse, whether it is for the first time or after prolonged storageSoak in water for about half an hour；

3. instructionThe surface of the electrode metal film is rough and can be used5000Polish with metallographic sandpaper or thick velvet cloth, wash and dryoneskyThe above can achieve the best measurement effect;

4. After calibration and measurement,firstRinse with waterelectrodeSurface togoRemove residuesWash with deionized water afterwards;

5. pHAdopting two pointscalibration, used bypHBuffer solution ispH4.01andpH6.86；

6. Try to makestandardThe temperature of the buffer solution is the same as that of the sample solutionOr approaching,Will achieve the bestdeterminationeffect；

7. Keep the connector clean and dry，Dirty or damp connectors can causeerror；

8. Don't take itelectrodeexposed to> 60℃in the environment；

9. This productcannotnon-aqueousUsed in solutions and dry solid media.

IIIdisplayfunctionAnd keyboard functions

4、 Operating instructions

ØConnecting electrodes

S906Instrument designThe interfaces from left to right are as follows:FSRReference electrode connectorMndElectrode connectors andNTCTemperature probe connector.

1. FSR reference electrode connector

Currently supports FSR-1 and FSR-1b reference electrodes (SmartScience))；

2. Mnd electrode connector

Currently supports Mnd-1 electrode (SmartScience)）And ORP-1 electrode (SmartScience))；

3. NTC temperature probe connector

Currently supports NTC-1 temperature probe.

If the above electrodes or probes need to be replaced, please contact Simote Technology.

ØCalibration and measurementpH

S906The instrument is measurablepH 2to14The sample，Automatic temperature compensationscope0–60°C，The instrument uses the two buffer solutions listed below fortwoPoint calibration.

Calibration bufferliquidOptions:4.01、6.86【25℃Time]

Warning: We recommend that you avoid temperatures exceeding the limit as much as possible60°CThe measurement environment, high temperaturecanshortenpHelectrodelife.

step：

1. Remove the protective cover from the electrode probe and connect the two electrodes and temperature probe to the instrument;

2. Press the on/off key ⑪ to turn on the instrument panel, and after 3 seconds, it will start up and display normally;

3. Short press the ⑭ key to switch and enter the illustrated interface (pH C.), which enters the calibration mode. Press ⑬ to confirm, and the interface will flash 4.01. Place the electrode and temperature probe in the first buffer solution (pH 4.01), gently stir to ensure that the electrode probe fully contacts the solution;

4. Ensure that there are no bubbles in the electrode probe, press ⑬ to confirm, and the ⑨ area will display "①" jumping, indicating that the first point pH=4.01 calibration has been entered. At this time, the ⑧ area will dynamically display the measured millivolt value, and the calibration of this point will be automatically completed after the reading stabilizes, usually taking about 3 minutes;

After completing the calibration of the first point, the display "②" in the ⑨ area flashes, indicating that it is ready to enter the calibration of the second point. At this time, select 6.86 by pressing the up and down keys. Follow the same steps to insert the three electrodes into the buffer solution with pH=6.86, observe that there are no bubbles on the electrode surface, and press ⑬ to confirm. After the reading stabilizes, the calibration of this point will be automatically completed, which usually takes about 3 minutes;

After the calibration operation is completed, the instrument automatically calculates and displays E0 and CT values, and determines them according to ⑬; If you are not satisfied with the calibration coefficient, you can press the ⑯ exit button to recalibrate.

7. If you are satisfied with the calibrated parameters, press the ⑭ key briefly to switch and enter the measurement mode shown in the diagram (pH Met.). Rinse the electrode and probe with deionized water and wipe them dry. Press ⑬ to confirm and start the measurement. The pH value is displayed in area ① of the instrument, and the measured millivolt value is dynamically displayed in area ⑧. The instrument automatically identifies the measurement endpoint, displays the final reading, and locks it.

How to abort calibration

If calibratedAn operational error occurred during the process,Or for other reasons, if you wish to stop calibration, pleaseLong button⑯，The instrument will interrupt and exit.

If any malfunctions are encountered during the calibration process, please refer to the troubleshooting section in this manualprocess.

Automatic temperature compensation

When measuring pH value, the temperature change of the pH electrode can cause deviation in the pH measurement value. In order to eliminate this deviation, this instrument uses automatic temperature compensation.

The principle of Automatic Temperature Compensation (ATC) is that the temperature sensor continuously measures the actual temperature of the solution, and then inputs the temperature signal into the instrument to automatically calculate the pH value and send it to the instrument display screen.

Automatic temperature compensation is of great significance for measuring pH values in media with significant temperature changes.

When connecting the NTC connector to a suitable temperature probe, the automatic temperature compensation (ATC) function is enabled. So after calibration, the pH value displayed by the instrument in pH mode has been temperature compensated. But if a temperature probe is not used, the automatic temperature compensation function is disabled, and the instrument temperature defaults to 25 ° C.

Warning:pHelectrodeBoth the reference electrode and the reference electrode must be connectedS906The corresponding interface of the instrument!

ØmVmeasurement

thismVThe main application of the calculation functionYuElectrochemical measurementinThe potentiometric method, usually combined with a suitable ion selective electrode (indicator electrode), can quickly measure. Its measurement range is-2000mV~ 2000mVThe resolution is0.1 mVYes, that's rightmVThe measurement of values does not require calibration by the user (each instrument has been tested before leaving the factory)mVUnless significant deviation is found, it must be returned to the factory for maintenance or calibration.

Oxidation-reduction potentialEhnot equal tomVmeasurementTherefore, for accurate measurement of oxidation-reduction potential, it is recommended that users further master the relevant chaptersContent againConduct measurements and calculations.

step：

1. Use the indicator electrode to be usedReference electrodeconnect toS906On the instrument；

2. Press to open/closekey⑪To open the instrument panel，3After a few seconds, it will start up and display normally;

3. short press⑭Press the key to switch and enter the interface（mV-Mea.）That is, enteringmVMeasurement mode. press⑬Press the key to confirm, then start measuring and the instrument will be dynamicmeasurementAnd automatically determine the measurement endpoint.

Øtemperature measurementstep：

1.Translate into Englishtemperature probeconnect toS906On the instrument；

2.Press to open/closekey⑪To open the instrument panel，3After a few seconds, the device will start up and display normally on the monitorupDirectly display the temperature value.

Øbattery

S906The instrument is powered by rechargeable lithium batteries. Icon on the monitor④appearRemaining battery capacity1When connecting the set, it should be connected in a timely mannerprovideCharging interface access standard5vofUSBCharge the mouth.

Recommend using nominal5VThe legitimate mobile phone manufacturer'sUSBcharger!

step：

1. fromS906Disconnect all electrodes on the instrument.

2. Gently open the black protective cover of the instrument panel and insert the charging cable interface into the interface on the right side of the instrument panel.

Automatic shutdown: If the instrument is in the power on state, 10minuteNo button operation insideThe instrument panel will sound an alarm；If there is still no operation, it will automatically shut down.