APERA EC400S Portable Conductivity Meter Instruction Manual

APERA EC400S Portable Conductivity Meter

BRIEF INTRODUCTION

Thank you for purchasing Apera Instruments EC400S Portable Conductivity Meters. Before using the product, please read this manual carefully to help you properly use and maintain the product. For technical support, please contact us at info@aperainst.de or +49 202 51988998 Apera Instruments reserves the right to update the content of this manual without giving prior notice.

Measuring Parameters

Features and Functions

•  The built-in microprocessor chip enables advanced functions such as auto calibration, auto temperature compensation, auto electrode recognition, parameter setting, self-diagnosis, calibration reminder, calibration time check, auto power-off, low-battery reminder, etc.
•  GLP data management, real-time clock display. Manual or Auto timing data storage. USB data communication.
•  The meter adopts advanced digital processing technology, intelligently improving the response time and accuracy of the measurements. Stable reading and auto lock display modes are available for choice.
•  Comes with a carrying case, which includes the meter, the electrode(s), calibration solutions, and other accessories, convenient for in-field use.
•  Meets IP57 Waterproof and dustproof rating, ideal for use under harsh environments.

Features in pH Measurement

•  1 to 5 points auto calibration with calibration guide and auto-check function.
•  Automatic recognition of calibration solutions. Two series of standard solutions for choice: USA and NIST

Features in Conductivity Measurement

•  1 to 4 points auto calibration with calibration guide and auto-check function.
•  Single-tap switch among conductivity, TDS, salinity, and resistivity.
•  Automatic recognition of conductivity calibration solutions.

TECHNICAL SPECIFICATIONS

Parameter Specifications

| ****

Technical Parameters

| Applicable Models
---|---|---

pH

| Measuring Range| (-2.00 to 19.99) pH| ****

PH400S PC400S

Resolution| 0.1/0.01 pH
Accuracy| ±0.01 pH ±1 digit
Temperature Compensation Range| ****

(0 to 100) °C, Automatic or Manual

mV

| Measuring Range| ****

-1999 mV to 0 to 1999 mV

Resolution| 1 mV
Accuracy| ±0.1% F.S ±1 digit

Conductivity

| ****

Measuring Range

| Conductivity: 0 to 200 mS/cm, including 5 ranges:

(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,

(20.0 to 199.9) mS/cm

TDS: (0 to 100) g/l, including 5 ranges:

(0.00 to 9.99) mg/l, (10.0 to 99.9) mg/l,

(100 to 999) mg/l, (1.00 to 9.99) g/l,

(10.0 to 100.0) g/l

Salinity: (0 to 100) ppt,

Resistivity: (0 to 100) mΩ·cm

| ****

EC400S PC400S

Resolution| 0.01/0.1/1 μS/cm, 0.01/0.1 mS/cm
Accuracy| ±1.0% F.S ±1 digit
Temperature Compensation Range| ****

(0 to 50) °C, Automatic or Manual

Electrode Constant| 0.1 / 1 / 10 cm-1

Temperature

| Measuring Range| -10 to 110℃| ****

PH400S EC400S PC400S

Resolution| 0.1°C
Accuracy| ±0.5°C±1 digit

Other Specifications

Data Storage

| PH400S, EC400S| 500 Groups
---|---|---
PC400S| 1000 Groups
Storage Content| Numberings, Date, Time, Measurements, Unit, Temperature
Data Output| USB
Power Supply| AA Batteries 4 (1.5V4)
IP Rating| IP57 Waterproof and Dustproof

Dimensions and Weight

| ****

PH400S, EC400S

| ****

Meter: (86x196x33) mm / 335 g.

With case: (360x275x80) mm / 1,6 kg

PC400S

| ****

Meter: (480x360x95) mm / 335 g With case: (480x360x95) mm / 4,2 kg

INSTRUMENT DESCRIPTION

LCD Display

1.  Measuring parameters
2.  Measuring value
3.  Timing storage
4.  Date, time, and reminder icons
5. date” and “Time”
6.  Measuring unit
7.  Temperature unit
8.  Measuring unit in calibration
9.  Calibration value, numberings of data storage, and reminder icons
10.  M+— Data storage; RM— Recall saved data
11.  Temperature and reminder icons
12.  ATC—Auto Temperature Compensation; MTC— Manual Temperature Compensation
13.  Stable reading icon
14.  Completed calibration icons
15.  Auto-Lock reading mode
16.  Low battery reminder. Please replace batteries when this icon is displayed.
17.  USB data communication. The meter is connected to your PC when this icon is displayed.

Keypad

• Short Press — <1.5 s；Long Press — >1.5
• Power On: Short press to power on LCD displays the measuring mode used last time (Backlight turned on for 1 minute).
• Power Off: The meter can only be turned off in measuring mode by short pressing
• Special Notes: Pressing in a calibration mode or parameter setting mode will NOT turn the meter off.
• Users need to press first to go back to measuring mode, and then press to power off.

Table- 1 Keypad Operation and Functions

Connectors
The meter adopts an 8-pin connector, into which pH, ORP, and conductivity electrodes can be connected. When connected, the meter will automatically switch to the correspondent measurement mode.

Display Mode
Stable Reading Display Mode

• When the measuring value is stable, the screen displays as shown in Figure 2. If does not appear or is flashing, that means the measuring value has not been stable. Users should wait for the smiley face and not record the readings or conduct calibrations at that moment.

Auto-Lock Display Mode
In the parameter setting P4.6, select “On” to turn on the auto-lock display mode, In which the reading will be automatically locked after the measuring value has been stable for more than 10 seconds, and the HOLD icon will come up as shown in figure-3. Short press to  cancel the hold.

Data Storage, Recall, and Deletion

Manual Data Storage
When reading is stable, short press the screen will display M+ Icon along with the storage numbering, and the data will be saved, as shown in figure-4. For the storage capacity for each model, please refer to section 2.2

Automatic Timing Data Storage
In the parameter setting P4.1, set up the time for timing measurements (e.g.3 minutes). will be displayed, meaning the meter is ready to enter the auto- timing storage mode. Short press    , and the 1st group of data will be stored. 3 minutes later, the 2nd one will be stored. Figure 5 shows that 8 groups of data have been automatically stored. Short press again, the icon will stop flashing. The meter stops the auto-timing storage. When in auto- timing storage, manual storage is disabled. In the parameter setting P4.1, set the time to 0 to exit auto-timing storage.

Recall the Stored Data

In measurement mode, long press the meter will recall the measured value that was last saved, as shown in figure 6, displaying the RM icon and the numbering. Press   or   recall other stored data. Long press or to change numberings swiftly.

Clear Stored Data
In parameter P4.5, select Yes to clear all the stored data. For details, please refer to section 7.5

pH MEASUREMENT

Information regarding the pH Electrode
The instrument is equipped with a 201T-S 3-in-1 Combination pH Electrode. Its built-in temperature sensor allows for auto temperature compensation. The electrode’s housing adopts PC plastics, which is shock-resistant and corrosion-resistant. When the pH electrode is dipped into the test sample solution, stir it for a few seconds to remove potential air bubbles inside the probe to help the measurement get stabilized quickly. When connecting the electrode to the instrument, please slowly rotate the connector, identify the location of the mount to insert it, and then screw it on. Please note that do not pull on the cables in case of poor contact. Please keep the connector clean and dry. For detailed maintenance of the electrodes, please refer to section 4.5

Information regarding pH Calibration
Standard Buffer Solutions
The instrument adopts two series of standard buffer solutions: USA and NIST as shown in Table 2. Users can select which one to use in P1.1 (refer to section 7.3).

pH Calibration Modes
The instrument has two calibration modes for choice: 3-point calibration (3P) and 5-point calibration mode (5P). Users can make the selection in parameter settings P1.4 (refer to section 7.3)

• 3-point Calibration Mode The 3-point calibration mode is the most commonly used. Users can adopt 1 to 3 points to calibrate as needed. In the 3-point calibration mode, the 1st point must be 7.00 pH (or 6.86 if using NIST). Then choose other calibration solutions to conduct 2nd and 3rd points (see Table-3 for details). In the process of calibration, the meter will display the electrode’s slope in acid and alkaline ranges.
• 5-point Calibration Mode In 5-point calibration mode, users can adopt 1 to 5 points of calibration and can choose calibration buffer solutions at any sequence. Typically, 5-point calibration is recommended when testing strong acid or strong base solutions.

How often to calibrate
The frequency that you need to calibrate your meter depends on the tested samples, the condition of the electrodes, and the requirement of accuracy. For High-Accuracy measurements (≤ ±0.02pH), the meter should be calibrated before the test every time; For ordinary-accuracy Measurements (≥±0.1pH), once calibrated, the meter can be used for about a week or longer. In the following cases, the meter must be re-calibrated:

•  The electrode hasn’t been used for a long time or the electrode is brand new.
•  After measuring strong acid (pH<2) or strong base (pH>12) solutions.
•  After measuring fluoride-containing solution and strong organic solution
•  There is a big difference between the temperature of the test sample and the temperature of the buffer solution that is used in the last calibration.

Calibration Reminder Function
Preset the interval between calibrations (starting from the time when you set it), and then the meter will remind you to calibrate at the end of that interval. For details, please see P1.2 (Section 7.3). When the preset time is reached, Er6 icon will be displayed at the lower right corner of the LCD (as shown in Figure 8). At the time, the meter can still be operated. It is just reminding you to do calibration in order to ensure accuracy. After calibration, the Er6 icon will disappear; To make it disappear, users can also choose “No” in P1.2 in the parameter setting.

Check calibration date
In this mode, users can see the date and time of last calibration to help determine if there is a need to re-calibrate. For details, please see parameter setting P1.3 (Section 7.3)

pH Calibration (Take 3-point calibration as an example)

• Press to enter calibration mode. The CAL1 icon will flash in the upper right corner of the LCD. 7.00 pH will flash in the lower right corner of the LCD, reminding you to use a pH 7.00 buffer to conduct 1st point of calibration.

• Use distilled water to rinse off the electrode and then dry it. Dip it into pH 7.00 buffer solution, stir gently and let it stand still, and wait for the reading to become stable. In the lower right corner of the LCD, the process of auto-recognizing the buffer solution will be displayed. Pressing before the buffer is recognized will generate Er2 (please refer to table 6).

• When the meter locks 7.00 pH, displays on LCD. Press the key to calibrate the meter. The end icon appears after calibration is done. The 1st point calibration is finished. In the meanwhile, CAL2 will flash at the upper right corner, and 4.00 pH & 10.01 pH will flash alternately at the bottom right, indicating using pH 4.00 or pH 10.01 buffer solution to make the 2nd point calibration.

• Take out the pH electrode, rinse it in distilled water, dry it, and dip it into a pH 4.00 buffer solution. Stir the solution gently and let stand still in the buffer solution until a stable reading is reached. The meter’s display will show the recognition process of the calibration buffer
  solution at the lower right of the LCD. When the meter recognizes 4.00 pH, displays it on LCD. Press the key to calibrate the meter. End icon and electrode slope of the acidity range display after calibration is done. In the meanwhile, CL3 will flash at the upper right corner of the LCD, and 10.01 pH will flash at the lower right, indicating using pH10.01 buffer solution to make the 3rd point calibration.

•  Take out pH electrode, rinse it in distilled water, dry it, and dip it into a pH 10.01 buffer solution. Stir the solution gently and let it stand still in the buffer solution until a stable reading is reached. The meter’s display will show the recognition process of the calibration buffer solution at the bottom right of the LCD. When the meter recognizes 10.01 pH, displays on LCD.

• any sequence and the slope data will not be displayed. During the calibration process, press the calibration mode. Correspondent calibration guide icons will appear on the LCD.
  Press key to calibrate the meter. End icon and electrode slope of the alkalinity range display after Figure-8 calibration is done. The meter returns to the measurement mode and displays stable measuring values and calibration guide icons. Please see Figure-8 for the above calibration process.

• 5-point calibration has the same process as the above shows. Users can choose calibration solutions without any sequence, and the slope data will not be displayed. During the calibration process, press the calibration mode. Correspondent calibration guide icons will appear on the LCD.

Sample Measurement
Rinse the pH electrode in distilled water or pure water, dry it, and dip it into the sample solution. Stir the solution gently and let it stand still in the sample solution until the icon appears and stays on LCD, get the pH reading, which is the pH value of the sample solution, please refer to Figure-9 for the calibration and measurement process of the pH meter. Figure-9 Calibration and measurement process of pH meter

Self-Diagnosis Information

pH isothermal measurement principle
According to the pH isothermal measurement principle, the closer the test sample’s temperature is to the calibration solution’s, the higher the accuracy of the measurement. So this principle is recommended to follow when conducting tests.

Restore to factory default
The instrument has a function to return to the factory default setting, which can be set up in P1.5 (refer to section 7.3). Returning to factory default setting is to restore the meter to the theoretical value (zero potential pH is 7.00, slope is 100%), and set all the parameters to default settings (see appendix 1). When the meter’s calibration or measurement is performing abnormally, users can use this function to let the meter return to factory default mode, and then conduct calibration and test again. Please note that this function is irreversible once used.

Maintenance of the pH Electrode
Daily maintenance
The soaking solution contained in the supplied protective bottle is used to maintain activation in the glass bulb and junction. Loosen the capsule, remove the electrode and rinse in distilled or pure water before taking a measurement. Insert the electrode and tighten the capsule after measurements to prevent the solution from leaking. If the soaking solution is turbid or moldy, replace the KCL solution. (Preparation: 26g KCL dissolved in 100ml pure water).
The electrode should not be soaked in pure or distilled water, protein solution or acid fluoride solution for long periods of time. In addition, do not soak the electrode in organic lipids.

Calibration buffer solution
For calibration accuracy, the pH of the standard buffer solution must be reliable. The buffer solution should be refreshed often, especially after heavy use. We recommend 10-15 times of use before replacing the pH buffers.

Protect glass bulb
The sensitive glass bulb at the front of the combination electrode should not come in contact with hard surfaces. Scratches or cracks on the electrode will cause inaccurate readings. Before and after each measurement, the electrode should be washed with pure water and dried. If a sample sticks to the electrode or it’s contaminated, the electrode should be thoroughly cleaned using a soft brush and then rinsed with pure water. After that, soak it in the KCL solution again for 6 hours.

Renew glass bulb
Electrodes that have been used over a long period of time will become aged. Submerge the electrode in 0.1mol/L hydrochloric acid for 24 hours, then wash the electrode in pure water, then submerge it in KCL soaking solution for 24 hours. The method to prepare 0.1mol/L hydrochloric acid: dilute 9mL hydrochloric acid in pure water to 1000mL. For serious passivation, submerge the bulb in 4% HF (hydrofluoric acid) for 3-5 seconds, and wash it in pure water, then submerge it in the soaking solution for 24 hours to renew it.

Clean contaminated glass bulb and junction (please refer to Table 8)

tablets)
Paints| Dilute bleacher, peroxide

Special Notes

1. The 201T-S Plastic 3-in-1 Combination pH Electrode that comes with this meter will NOT give accurate and stable pH readings when testing distilled or deionized water. This is because these purified waters do not have enough ions present for the electrode to function properly. To measure purified water pH levels, users need to use a specialized electrode. Visit www.aperainst.de/electrodes and find the compatible Pure Water LabSen electrode for your meter in order to accurately test purified waters.
2. The electrode housing is polycarbonate. When using cleaning solutions, take caution on carbon tetrachloride, trichloroethylene, tetrahydrofuran, acetone, etc., which will dissolve the housing and invalidate the electrode.

mV MEASUREMENT

ORP measurement
Press a key,  and switch the meter to mV measurement mode. Connect the ORP electrode (the 301Pt-S combination ORP electrode is sold separately) and dip it in the sample solution, stir the solution briefly and allow it to stay in the solution until the icon appears and get the reading. ORP means Oxidation Reduction Potential. The unit is mV.

Notes on ORP measurement
ORP measurement does not require calibration. When the user is not sure about ORP electrode quality or measuring value, use ORP standard solution to test the mV value and see whether the ORP electrode or meter works properly. Table 9 is the data of the standard ORP solution for 222 mV.

Clean and activate the 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 the ORP electrode:

• For inorganic pollutants, submerge the electrode in 0.1mol/L dilute hydrochloric acid for 30 minutes, then wash it in pure water, then submerge it in the soaking solution for 6 hours.
• For organic or lipid pollutants, clean the platinum surface with detergent, then wash it in pure water, then submerge it in the soaking solution for 6 rs.
•  For a heavily polluted platinum surface on which there is oxidation film, polish the platinum surface with toothpaste, then wash it in pure water, then submerge it in the soaking solution for 6 hours.

CONDUCTIVITY MEASUREMENT

Information regarding the Conductivity Electrode

Conductivity electrode
Model 2301T-S plastic conductivity electrode with constant K=1.0 and built-in temperature sensor can realize automatic temperature compensation. The electrode housing is POM plastic which is corrosion-resistant and impact resistant. When submerging the conductivity electrode in solution, stir the solution briefly to eliminate the air bubbles and improve response and stability.

Conductivity electrode constant
The meter matches the conductivity electrodes of three constants: K=0.1, K=1.0, and K=10.0. Please refer to chart- 6 for measuring range. Set constant in parameter setting P2.1 and refer to clause

Chart – 6 Electrode constant and measuring range

Conductivity electrode constant

|

K=0.1 cm-1

|

K=1.0 cm-1

|

K=10 cm-1

Standard solution| 84μS/cm| 84 μS/cm| 1413 μS/cm| 12.88 mS/cm| 111.8 mS/cm
Electrode’s model| DJS-0.1T-S| 2301T-S| 2310T-S

Note: When testing ultra-pure water with conductivity less than 1.0 μS/cm, a flow test should be conducted in a flow cell.
When connecting the electrode, please rotate slowly to identify the location of the mount before plugging in. The nut on the connector should be screwed on tightly. Once the conductivity electrode is connected, the meter will automatically switch to conductivity mode (no need to switch manually). Please do not pull the cable in case of poor contact. Make sure the connector is clean and dry. See more information regarding the conductivity electrode’s maintenance in section 6.6.

Information regarding Conductivity Calibration
The meter uses a conductivity standard solution of 84 μS/cm, 1413 μS/cm, 12.88 mS/cm, and 111.8 mS/cm. The meter can recognize the standard solution automatically and can perform 1 to 4 points of calibration. The calibration indication icons correspond to the four standard values as shown in Table 8.

Table 8 Conductivity Calibration Solutions

How often to calibrate

•  The meter has been calibrated before leaving the factory and can generally be used right out of the box.
•  Normally perform calibration once per month.
•  For high-accuracy measurements or large temperature deviation from the reference temperature (25°C), perform calibration once per week.
•  Use a conductivity standard solution to check whether there is an error. Perform calibration if error is large.
•  For new electrodes or the meter has been set to factory default, perform 3-point or 4-point calibration. For general use, choose standard solutions that are closer to the sample solution to perform 1-point or 2-point calibration.

Single-point and multi-point calibration
If 1-point calibration is conducted after 3-point or 4-point calibration is done, the previous calibration values in the same range will be replaced. In the meanwhile, the meter will display the 1-point calibration icon, and the other calibration icons will be removed, but the chip will still store the data from the last calibration. When conducting multi-point calibration, users should follow the sequence from low conductivity to high in case the high- concentration solution contaminates the low ones.

Reference Temperature
The factory default setting for reference temperature is 25℃. The reference temperature can be set from 15℃ to 30℃. Users can set it up in parameter setting P2.5 (see Section 7.4 for details).

Temperature compensation coefficient
The temperature compensation coefficient of the meter setting is 2.0%/°C. However, the conductivity temperature coefficient is different from solutions and concentration. Please refer to Table – 9 and the data collected during testing. Do the setting in P2.3. (see section 7.4 for more).
Note: When the coefficient for the temperature compensation is set to 0.00 (no compensation), the measurement value will be based on the current temperature.

Precaution for calibration solution’s contamination
The conductivity standard solution has no buffer. Please avoid being contaminated during usage. Before submerging the electrode in the standard solution, please wash the electrode and allow it to dry. Please do not use the same cup of conductivity standard solution repeatedly, especially for a standard solution of low concentration (84μS/cm). The contaminated standard solution will affect accuracy.

Calibration Reminder Setup
Preset the interval between calibrations (starting from the time when you set it), and then the meter will remind you to calibrate at the end of that interval. For details, please see P2.3 (Section 7.4). When the preset time is reached, Er6 icon will be displayed at the lower right corner of the LCD (as shown in Figure-8). At the time, the meter can still be operated. It is just reminding you to do calibration in order to ensure accuracy. After calibration, the Er6 icon will disappear; To make it disappear, users can also choose “No” in P2.3 in the parameter setting.

Check calibration date
In this mode, users can see the date and time of last calibration to help determine if there is a need to re-calibrate. For details, please see parameter setting P2.3 (Section 7.3)

Conductivity Calibration

1.  Rinse the electrode in pure water, allow it to dry, wash with a little of standard solution and submerge it in standard solution. Stir the solution briefly and allow it to stay in the solution until a stable reading is reached.
2.  Press the key to enter the calibration mode. The meter’s display will show a blinking “CAL” at the top right, and the scanning and locking process of the calibration solution at the bottom right. When the meter locks 1413 μS, a stable icon will display on LCD. Press   the key to complete calibration. The meter will return to measuring mode and s displayed on the bottom left of the LCD screen. See Figure-11.
3. Notes: Pressing the key before the stable icon appeared on the LCD screen, an Error indication icon Er 2 will be shown. See Table -11.
4. For multi-point calibrations, please repeat the steps in 6.3.1 to 6.3.2 until all calibrations are finished. The meter can be calibrated in the same calibration solution repeatedly until the reading is stable and repeatable.

TDS, Salinity, Resistivity & Conductivity

1.  TDS and conductivity is linear related. The conversion factor is 0.40-1.00. Adjust the factor from parameter P2.6. The factory default setting is 0.71 and please refer to section 7.4. Salinity and resistivity are all proportional to conductivity. The calculating formula is preset in the meter. So the meter only needs to be calibrated in Conductivity mode, then after calibration of conductivity, the meter can switch from conductivity to TDS, salinity, or resistivity.
2.  Adjust the TDS conversion factor in parameter setting P2.6 according to the data collected during testing and experience. Table – 10 lists some commonly used Conductivity and TDS conversion factors. This is for your reference only.

Sample test

1. Rinse the conductivity electrode in distilled or pure water, dry it, and submerge it in the sample solution. Stir the solution briefly and allow it to stay in the sample solution until a stable reading is reached and the icon relative information as below: Table – 11. appears on LCD, then get the reading value, which is the conductivity value of the solution.
2. During the process of calibration and measurement, the meter has self-diagnosis functions, indicating.

Factory default setting
For factory default setting, please refer to parameter setting P2.7 (Section 7.4). With this function, all calibration data is deleted and the meter restores to the theoretical value. Some functions restore to the original value (refer to appendix -1). When calibration or measurement fails, please restore the meter to the factory default setting and then perform re- calibration or measurement. Please note that once set the factory default, all the data deleted will be irretrievable.

Maintenance of the Conductivity Electrode

Always keep the conductivity electrode clean. Before taking a measurement, rinse the electrode in pure water. It is recommended to rinse it again in the sample solution. When submerging the electrode in solution, stir the solution briefly to eliminate air bubbles and allow it to stay until a stable reading is reached. Conductivity electrodes are usually stored dry. For conductivity electrodes that haven’t been used for a long time, users should soak the electrode in 12.88 mS calibration solution for 5-10 minutes, or to soak it in tap water for 1 to 2 hours. Rinse the electrode in pure water after measurement.

The sensing rod of the Model 2301T-S conductivity electrode is coated with platinum black to minimize electrode polarization and expand the measuring range. The platinum black coating adopted our special processing technology, which improves the electrode performance and the firmness of the coating. If the platinum black electrode is stained, gently clean the electrode with a soft brush in warm water containing detergent or alcohol.

pH Setting Sub-Menu

Conductivity Setting Sub-Menu

Basic Parameter Setting Sub-Menu

USB DATA COMMUNICATION

The instrument uses PC-Link software for data communication through a USB connector and cable.
Software Interface

Stored data
Press the “Download” Key to upload the data in the meter to the software, including date, time, measurements, temperature, and temperature compensation mode. The program will categorize the data by pH, mV, and Cond. Press after the meter is connected to the computer, or set up an auto timing storage function. In this case,  all the measuring data will be uploaded to the software, and will not be stored in the meter.

•  Model and Numberings
•  Calibration information
•  COM Port #and other buttons
• COM Port # is the number for the software to connect with the computer. Every computer’s COM port is different. In Figure 13, the COM port # is COM4.
•  Open/Close — Click it to turn on/off the program. When turned on, the LCD will display
•  Refresh — the COM port reset button; Click it to reset the COM port to COM1.
•  SyncTime — Click it to sync the computer’s time and date to the meter’s.
•  Download — Click it to upload the data stored in the meter to the computer.
•  Clear — Click it to clear all the data.
•  Export — Click it to export all the data to a Microsoft Excel file.
•  Exit — Click it to exit the program.

Install the software
The PC-Link software works for all Windows-based systems (does not work for Mac). Insert the PC-Link disk into the computer, and open the PC-Link folder where you will find the folder for PC-Link software and a zipped file for drivers. Typically, users can directly open the file with the PCLink icon to use the software. If the meter cannot be connected to the computer, please install the USB driver (in the zipped file) before using the software.

Choose COM Port
Connect the meter to your computer with the USB cable. Open the PC-Link program. Click the arrow icon next to the  COM1 Port,  click the bottom port number, and then click Open. The LCD will display is hard to be confirmed, users can identify it in Windows Device Manager.

Run Software
Click the Download key to upload the data stored in the meter to the software, including date, time, measurements, temperature, and temperature compensation mode. The program will categorize the data by pH, mV, and Cond.

Real-time storage

• When the program is running and the meter is connected to the computer, press on the meter or set up auto-timing storage to upload all the measuring data to the software. The data will not be stored in the meter in this mode.
• Click “Export” to export all the data to a Microsoft Excel file. Users can process, analyze, and print the data in an Excel file.

COMPLETE KIT

| Content| Quantity| PH400S| EC400S| PC400S
---|---|---|---|---|---
1| PH400S Portable pH Meter| 1| √| |
2| EC400S Portable Conductivity Meter| 1| | √|
3| PC400S Portable pH/Conductivity Meter| 1| | | √
4| 201T-S Plastic 3-in-1 Combination pH Electrode| 1| √| | √
5| 2301T-S Plastic Combination Conductivity Electrode| 1| | √| √
6| pH Standard Buffer (4.00 pH,7.00 pH,10.01pH)| 50ml for each| √| | √
7| Conductivity Standard Solution (84μS,1413μS,12.88mS)| 50ml for each| | √| √
8| PC-Link Software Disk| 1| √| √| √
9| USB Cable| 1| √| √| √
10| Small Carrying Case| 1| √| √|
11| Big Carrying Case| 1| | | √
12| Instruction Manual| 1| √| √| √

WARRANTY

We warrant this instrument to be free from defects in material and workmanship and agree to repair or replace free of charge, at the option of APERA INSTRUMENTS, any malfunctioned or damaged product attributable to the responsibility of APERA INSTRUMENTS for a period of TWO YEARS (SIX MONTHS for the probe) from the delivery.

This limited warranty does not cover any damages due to: Transportation, storage, improper use, failure to follow the product instructions or to perform any preventive maintenance, modifications, combination or use with any products, materials, processes, systems or other matter not provided or authorized in writing by us, unauthorized repair, normal wear and tear, or external causes such as accidents, abuse, or other actions or events beyond our reasonable control.

APPENDIX 1: TABLE OF PARAMETER SETTING AND FACTORY DEFAULT SETTING

APPENDIX 2: ICONS AND ABBREVIATION

APPENDIX 3: TABLE OF SELF-DIAGNOSIS

APERA INSTRUMENTS (Europe) GmbH Address: Wilhelm-Muthmann-Str.18 42329 Wuppertal, Germany

• Email: info@aperainst.de
• Website: www.aperainst.de
• Tel.: +49 202 51988998

References

• Apera Instruments
• Apera Instruments
• Apera Instruments

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