environmental express pH100 100 Series Portable pH Cond Meter Instruction Manual

100 Series Portable pH/Cond. Meter
Instruction Manual
pH 100 portable pH Meter
EC 100 portable conductivity Meter
PC 100 portable pH/Cond. Meter

Environmental Express
www.environmentalexpress.com

BRIEF INTRODUCTION

Thank you for purchasing Environmental Express 100 series Portable pH/Cond. Meter (hereafter referred to as the instrument). The instrument is an outstanding combination of the most advanced electronic technology and software design.
Before using the product, please read this manual carefully to help you properly use and maintain the product. Environmental Express reserves the right to update the content of this manual without giving prior notices.

Measuring Parameters

Features and Functions

• The built-in microprocessor chip enables advanced functions such as auto calibration, auto temperature compensation, parameter setting, self-diagnosis, auto power-off, low-battery reminder, etc. PC100 meter can measure pH & conductivity at the same time. See diagram on the right, pH electrode, conductivity electrode and the temperature probe can be installed on the clip for simultaneous measurements.
• The meter adopts advanced digital processing technology, intelligently improves the response time and accuracy of the measurements. Stable reading and auto lock display mode are available for choice.
• Meets IP57 waterproof and dust resistant rating, ideal for use under harsh environment.

Features of Measuring Parameters

Measuring
Parameter| Features| Applicable
Model
---|---|---
pH| • 1-3 points auto calibration with calibration guide & self-diagnosis function.
• Automatic recognition of pH calibration solutions: USA, NIST & CUS (userdefined).| pH100
PC100
mV| With temperature measurement and display function.| pH100
PC100
ORP| With ORP calibration function| pH100
PC100
Cond.| • 1— 4 points auto calibration with calibration guide and auto-check function.
• Automatic recognition of conductivity calibration solutions: Standard & CUS (User-defined).
• Single-tap switch among conductivity, TDS and Salinity.| EC100
PC100

TECHNICAL SPECIFICATIONS

Parameter Specifications

| Technical Parameters| Applicable
Models
---|---|---
pH| Range| 0.00 — 14.00pH| pH100
PC100
Resolution| 0.01/0.1 pH
Accuracy| ±0.01 pH
Temperature
compensation range| 0 – 100°C (Auto or manual)
Calibration| 1-3 points auto calibration
Buffer solutions| USA, NIST
mV| Measuring
Range| -±1000mV| pH 100
0| Resolution| -200″ 200mV: 30.1mV Other range: ±1mV| PC 100
Accuracy| 30.2% F.S.
ORP| Range| ±1000mV| pH 100
PC 100
Resolution| lmV
Accuracy| ±0.2% F.S.
Calibration Range| ±50mV of reading
Conductivity| Measuring Range| 0-200 mS/cm, including 5 ranges:
0.00-19.99pS/cm, 20.0-199.9pS/cm, 200-1999p5/cm,
2.00-19.99mS/cm, 20.0-199.9m5/cm| EC 100
Resolution| 0.01/0.1/1pS/cm, 0.01/0.1 mS/cm
Accuracy| ±1.0% ES.
Temperature
compensation range| 0′ 60°C (Auto or manual)
Electrode
Constant| PC 100 0.1 / 1 / 10 cm’
Temperature
coefficient| 0-9.99%/°C
Reference
temperature| 15-30°C
Calibration| 1-4 points automatic
Calibration solutions| 84µS/cm, 1413µS/cm, 12.88mS/cm, 111.8m5/cm
TDS| Range| 0-100g/L| EC 100
Pr inn
Accuracy| ±1.0% F.S.
Salinity| Range| 0-100ppt| EC 100
or im
Accuracy| ±1.0% F.S.
Temperature| Range| 0-100°C| pH 100
EC 100
Resolution| 0.1°C
Accuracy| ±0.5°C tldigit

Other specifications

Dimension &
Weight| Meter: 91×190×33mm, (3.58”x7.48”x1.29”) / 342 gm
Carrying case: 330×270×82mm, (12.99”x10.63”x3.22”) / 0.59 kg
Paper box: 255×200×45mm, (10.04”x7.87”x1.77”) /1.28 kg

INSTRUMENT DESCRIPTION

LCD display

Keypad functions

Short press —– <2 seconds; Long press —– >2 seconds.

Table – 1 Keypad operations and descriptions

pH100 pH meter:
EC100 conductivity meter:
PC100 pH/cond. meter:
• Long press to enter the menu of parameter setup
| Long press
Short press| • In measurement mode, long press to enter calibration mode.
• Press to cancel operation, the meter returns to measurement mode or the previous interface.
• When the measure value is locked-up, short press release lock-up.
| Short press| • In measurement mode: press to turn on/off the backlight.
• In calibration mode: press to calibrate.
• In the parameter setup mode: press to enter and open the sub-menu, confirm parameter.
| Short press
Long press| • Under MTC (see Section 3.4.4), short press to change temperature, long press for quick changing of the value.
• In parameter setup mode: press to select parameter.

Meter sockets

The meter sockets are protected by silicon caps, waterproof and dustproof, open the silicon caps and connect the meter with the electrode.

Table – 2 Meter sockets

(middle)—connect temperature probe
EC100| BNC socket (right)—connect conductivity electrode 02.5 socket (middle)—connect temperature probe
PC100| BNC socket (left)—connect pH electrode or ORP electrode 02.5 socket (middle)—connect temperature probe
BNC socket (right)—connect conductivity electrode

Display mode and other functions

Stable Reading Mode
When the measurement value is almost stable, smiley icon appears on LCD, see Diagram – 2. If the smiley icon does not appear or flash, please do not get the reading value or conduct calibration until the measuring value is stable.

Automatic Lock-up Display Mode
Select on from parameter P6.2 to turn on automatic lock-up display function. When the reading value stabilizes more than 10 seconds, the meter locks the reading value automatically and Displays HOLD icon, see Diagram – 3. In HOLD mode, press to release lock-up.

Other functions

Manual Temperature Compensation
When temperature probe is not connected, press or to change the temperature value, long press for quick changing of the temperature value.

Automatic Power-off
The meter is with automatic power-off function. Select from parameter P6.4 to select automatic power-off time: 10-20-30-off, i.e. user can select automatic power-off time to be 10 minutes, 20 minutes or 30 minutes (starting from the last operation). When Off is selected, the meter will not turn off automatically.

Back-light
The meter is with white backlight, suitable for application even in dark environments. However, when backlight is on, the consumption of the power will increase. Press to turn on/off the backlight in measurement mode. Select from P6.3 to select lasting time for backlight: 1-2-3-Off, i.e. select backlight lasting time to be 1 minute, 2 minutes or 3 minutes. When Off is selected, the backlight will be turned on all the time.

Battery
The meter adopts 3xAA batteries. Please use LR6 alkaline battery to ensure the battery quality. Battery life > 200 hours (without backlight).
When LCD displays icon, please replace with new batteries, see Diagram – 4.

PH MEASUREMENT

pH electrode information

The meter connects to 201-C plastic combination pH electrode, with BNC connector.
Configured with MP500-2.5 temperature probe (built in 30kΩ thermistor), Phono plug. The meter can use other pH combination electrodes with the BNC connector.

When both the pH electrode and the temperature probe are connected to the meter, it directly goes to automatic temperature compensation mode. When the meter is connected to the pH electrode only, it will enter manual temperature compensation mode.
Press or to input the temperature into the meter.

Gently stir the pH electrode for a few seconds after it’s dipped into the test solution to eliminate air bubbles for the stable measurement in a short period of time.

Calibration solution and calibration mode

Calibration solution
The meter is capable of calibrating up to 5 pH values using USA or NIST buffer series, corresponding to calibration indicator icons, see Table – 3.

Table – 3 pH buffer solution series

3 points
calibration| | 1.68 or 4.00 pH| 1.68 or 4.01 pH
| 7.00 pH| 6.86 pH
| 10.01 or 12.45pH| 9.18 or 12.45 pH

Calibration mode
The meter can adopt 1 to 3 points of calibration. The 1st point must be using 7.00 pH (or 6.86 pH) buffer solution, and then choose other buffers to do 2nd point and 3rd point. Please refer to Table-4 for details.

Table – 4 Calibration mode

| USA| NIST| Calibration
icon| When to adopt
---|---|---|---|---
1-Point
Calibration| 7.00 pH| 6.86 pH| | Accuracy: ±0.1pH
2-Point
Calibration| 7.00 pH->4.00 or 1.68pH| 6.86 pH-)4.01 or 1.68pH| | Measuring range: 0
to 7.00 pH
7.00 pH910.01 or 12.45pH| 6.86 pH->9.18 or 12.45pH| | Measuring
range: >7.00 pH
3-Point
Calibration| 7.00pH94.00 or
1.68pH910.01 or 12.45pH| 6.86pH->4.01 or 1.68pH->
9.18 or 12.45pH| | Wide measuring
range

pH Measurement

The 1st point calibration
Rinse the pH electrode and the temperature probe in distilled or deionized water and allow it to dry, long press to the enter calibration mode. CAL1 icon will flash in the bottom right corner of the LCD, reminding you to use pH7.00 buffer to conduct the 1st point of calibration. Dip the pH electrode and the temperature probe into pH7.00 buffer solution, stir gently and let it stand still and wait for the reading to be stable. When the stable icon displays on LCD, press to finish 1st point calibration, meter goes to measurement mode, the bottom left of LCD indicating .

The 2nd point calibration
Rinse the pH electrode and the temperature probe in distilled or deionized water, allow it to dry. Long press to enter calibration mode. CAL2 icon flashes at the bottom right corner of the LCD, reminding you to make the 2nd point of calibration. Submerge the electrodes into pH4.00 buffer solution, stir the solution gently and allow it to stay in the buffer solution until a stable reading is reached. The meter’s display will show scanning and locking process of calibration buffer solution at the bottom right of LCD. When the meter locks 4.00pH, stable icon displays and stays on LCD. Press to calibrate the meter. Electrode slope displays after calibration is done, the 2nd point calibration finished, the meter goes to measurement mode, and the bottom left of LCD indicates .

The 3rd point calibration
Repeat the steps as per Section 4.3.2, use pH10.01 buffer solution, and complete the 3rd point calibration. The bottom left of LCD indicates .

pH test

Rinse pH electrode in distilled or deionized water, allow it to dry, and submerge it in the sample solution. Stir the solution briefly and allow it to stay in the sample until the value becomes stable and icon appears on LCD, get the reading which is the pH value of the sample solution.

Information regarding pH calibration and measurement

1. During the process of calibration and measurement, submerge both the pH electrode and the temperature probe into the solution to ensure automatic temperature compensation.

2. In calibration mode, press to exit.

3. The meter can conduct 1~3 points of calibration according to measurement requirements.
   Refer to Table – 4 to check when to adopt.

4. During the process of calibration and measurement, the meter has self-diagnosis functions, indicating information Er1~Er4, please refer to Table – 5 for relevant solutions.

5. The calibration frequency depends on the sample, electrode performance and accuracy requirement. For high accuracy measurements (≤±0.03pH), the meter should be calibrated before test every time. For ordinary accuracy measurements (≥±0.1pH), once calibrated, the meter can be used for about a week or even longer.
   In the following cases, the meter must be re-calibrated:
   a) The electrode hasn’t been used for a long time or the electrode is brand new.
   b) After measuring strong acid (pH<2) or strong base (pH>12) solutions.
   c) After measuring fluoride-containing solution and strong organic solution.
   d) 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.

6. pH temperature principle
   Please note that the closer the temperature of the sample is to the calibration solution, the more accurate will be the readings.

7. Factory default setting

The meter has a function to return to factory default setting, which can be set up in P1.3. All calibration data will be deleted, and the meter will restore to the theory value (zero electrical potential of pH is 7.00, the slope is 100%). Some functions restore to the default value (refer to Appendix – 1). When calibration or measurement fails, please restore the meter to factory default setting and then perform re-calibration or measurement. Please note once set the factory default, all the data deleted will be irretrievable.

Customized calibration (take 1.60pH & 6.50pH as example)

1. Choose CUS (customized calibration) in parameter setting P1.1, the meter enters customize calibration mode.

2. Rinse the electrode with distilled or deionized water, allow it to dry. Long press to enter calibration mode, dip it into 1.60pH calibration solution, stir gently and let it stand still and wait for the reading to become stable. When the smiley icon displays on LCD, press to adjust the value to 1.60, then press to confirm the calibration.
   The meter goes back to measurement mode, and the 1st point calibration is completed.

3. Dip the electrode into 6.50pH buffer solution, follow the steps as per Section 4.6.2 to finish the 2nd point of calibration. The meter can conduct 1~2 points of customized calibration.

Notes regarding customized calibration

1. Calibration indicator will NOT appear at the bottom left of the LCD for a customized calibration.
2. The pH of “customized calibration” is the measurement under certain temperature. The meter must calibrate and measure in the same  temperature, otherwise it will be inaccurate.
   The meter does not recognize customize calibration solutions.

Self-diagnosis information

Among the calibration and measurement procedure, the meter has self-diagnosis function, indicating relevant information, see Table – 5.

Table – 5 Self-diagnosis information in pH measurement mode

stays.
| Wrong pH buffer solution or the buffer solution out of range.| 1. Check whether pH buffer solution is correct.
2. Check whether the meter connects the electrode properly.
3. Check whether the electrode is damaged.
| During calibration, the measuring value being unstable ( .- 3min).| 1. Check whether there are air bubbles in glass bulb.
2. Replace with a new pH electrode.
| pH electrode zero electric potential out of range (<-60mV or >60mV)
Electrode slope<75%| 1. Check whether there are air bubbles in glass bulb.
2. Check whether pH buffer solution is correct.
3. Replace with a new pH electrode.

Maintenance of the pH Electrode

Daily maintenance
The soaking solution contained in the supplied protective bottle is used to maintain hydration of the glass bulb and liquid junction. Loose the cap, take out the electrode and rinse in distilled or deionized water before taking a measurement. Insert the electrode and tighten the cap after measurements to prevent the solution from leaking. If the storage solution is cloudy or moldy, rinse the bottle and replace the soaking solution (The method to prepare, dissolve 26g KCl into 100ml distilled water).
Make sure the meter is dry and clean all the time, especially the sockets and connectors, or else it may lead to measurement inaccuracy or invalid readings. Once contaminated, use medical cotton and water free alcohol to wipe clean and allow it to dry.
*The electrode should NOT be soaked and stored in purified or distilled water, protein solution, acid fluoride solution or 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.

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 rinsed with distilled or deionized water. Do not wipe the glass bulb with tissue paper as it may lead to unstable electric potential of the electrode and the slow response. If a sample sticks to the electrode or it’s contaminated, the electrode should be thoroughly cleaned with soap water and then rinsed with distilled water.

Renew glass bulb
Electrodes that have been used for a long period of time will become aged. Submerge the electrode in 0.1mol/L hydrochloric acid for 24 hours, then rinse the electrode in distilled water, then submerge it in the soaking solution for 24 hours. For serious passivation, submerge the bulb in the pH soaking solution (sold separately) to renew it.

Clean contaminated glass bulb and junction (see Table – 6)

Table – 6 Clean contaminated pH glass bulb and junction

tablets)
Paints| Dilute bleacher, peroxide

The electrode housing is polycarbonate. Please avoid using detergents including perchloromethane, trichloroethylene, diethylene oxide and acetone, as these solutions will dissolve the shaft material and lead to passivation or failure of the pH electrode.

MV AND ORP MEASUREMENT

Press and switch the meter to mV and ORP mode. mV mode is to measure the electric potential of the pH electrode or other ISE, with temperature measurement function; ORP mode is to measure the potential of the ORP electrode, without temperature measurement function but with calibration function. See below table for the difference of the 2 modes.

Table – 7 mV and ORP measurement mode

| mV| ORP
---|---|---
Range| ±1000mV| ±1000mV
Resolution| ±200mV: ±0.1 mV
Other: ±1 mV| ±1 mV
Temperature| 0~100.0℃| N/A
Accuracy| ±0.2% F.S.| ±0.2% F.S.
Application| Electric potential of the pH electrode and other ISE| Electric potential of the ORP electrode
Calibration| N/A| ±50mV of the measuring value

mV measurement

Connect the pH combination electrode (or other ion combination electrodes) and the temperature probe, submerge into the solution, stir gently and let it stand still, wait for the reading to be stable and LCD displays and then get the reading.

ORP measurement

1. ORP means Oxidation Reduction Potential. It is an important measurement indicator of the oxidation and reduction potential of water solutions. The unit is mV.

2. ORP measurement does not require calibration. This is because ORP is a qualitative measurement of the redox ability of a solution, it is a relative index, not a quantitative calculation. Connect to the ORP combination electrode (sold separately), immerse into the sample solution, gently stir and let it stand still. Wait for the reading to be stable and LCD displays , and then get the reading.

3. In order to make the ORP reading more comparable with the reference values, user can calibrate using ORP standard solutions. Rinse the ORP electrode in distilled or deionized water and allow it to dry. Long press to enter calibration mode, dip the electrode into the ORP standard solution with known value. Gently stir and let it stand still, wait for the reading to be stable and LCD displays , and then get the reading. Press or , adjust it to the required value. The range that can be adjusted is ±50mV, then press to calibrate. The meter returns to measurement mode.

4. ORP standard solution:
   There are different ORP standard solutions on the market, for example: 222mV or 468mV ORP standard solution, which are all applicable of the meter. ORP standard solutions can not only used for the calibration of ORP meters, but also used to check whether the ORP meter works properly. If the ORP meter has been calibrated, please restore the ORP calibration mode to factory default setting before using ORP standard solution to check if the meter works fine. Select Yes in parameter setting P2.1, and then test the ORP standard solution.

5. 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 ORP electrode:
   (a) For inorganic pollutant, submerge the electrode in 0.1mol/L dilute hydrochloric acid for 30 minutes, then wash it in distilled water, then submerge it in the electrode storage solution for 6 hours.
   (b) For organic or lipid pollutant, clean the platinum surface with detergent, then wash it in distilled water, then submerge it in the electrode storage solution for 6 hours.
   (c) 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 electrode storage solution for 6 hours.

CONDUCTIVITY MEASUREMENT

Conductivity electrode information

1. The meter comes with conductivity electrode with BNC connector and temperature probe (built-in 30kΩ thermistor) with 2.5 mm Phono plug.
2. When both the conductivity electrode and the temperature probe are connected to the meter, it directly enters automatic temperature compensation mode. When the meter is connected to the conductivity electrode only, it will enter manual temperature compensation mode. Press or to input the temperature into the meter.
3. Gently stir the conductivity electrode for a few seconds after it has dipped into the test solution to eliminate air bubbles for the stable measurement in a short period of time.
4. Conductivity electrode constant
   The meter matches conductivity electrodes of three constants: K=0.1, K=1.0 and K=10.0. Please refer to Table – 8 for measuring range. Set constant in parameter setting P3.2, refer to Section 7.4.

Table – 8 measuring ranges of cell constants

Information about conductivity calibration

1. Conductivity calibration solutions
   The meter uses conductivity standard solution of 84 μS/cm, 1413 μS/cm, 12.88 mS/cm and 111.9 mS/cm. The meter can recognize the standard solution automatically, can perform 1~4 points calibration. The calibration indication icons correspond to the four standard values ( icon  corresponds to two standards). See Table – 9.
   Table – 9 Conductivity standard solution seriesIndication
   Icon| Calibration
   Solution| Indication
   Icon| Calibration
   Solution| Indication
   Icon| Calibration Solution
   ---|---|---|---|---|---
   | 84 µS/cm| | 1413 µS/cm| | 12.88 mS/cm or 111.8 mS/cm

2. Calibration intervals
   (a) The meter is calibrated before leaving the factory and can generally be used right out of the package.
   (b) Normally perform calibration per month.
   (c) For high accuracy measurements or large temperature deviation from the reference temperature (25°C), perform calibration per week.
   (d) Use conductivity standard solution to check whether there is error. Perform calibration for large error.
   (e) For new electrode or factory default setting, perform 3-point or 4-point calibration. Choose closer standard solution to the sample solution to perform 1-point or 2-point calibration.

3. Reference temperature
   Reference temperature of factory default is 25°C. Other reference temperature can also be set for range 15°C ~ 30°C. Select in parameter setting P3.3 and refer to Section 7.4.

4. Temperature 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 – 10 and the data collected during testing. Set per parameter setting P3.4. and refer to Section 7.4.
   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.
   Table – 10 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

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

Conductivity calibration (take 1413 μS/cm as an example)

1. Rinse the electrode in distilled or deionized water, allow it to dry, long press to enter calibration mode, submerge it in 1413 μS/cm standard solution. Gently stir and let it stand still until a stable reading is reached. The meter’s display will show scanning and locking process of calibration buffer solution at the bottom right of LCD. When the meter locks 1413 μS, stable icon displays and stays on LCD. Press to finish calibration. The meter returns to measurement mode and the bottom left of LCD indicates .
2. For multi-point calibration, please repeat the steps indicated in Section 6.3.1 until all the calibrations are done. The meter can repeat calibration in the same calibration solution to ensure better accuracy and repeatability of the reading.
3. Notes
   (a) Er1 (see Table – 12) appears if press key before the stable icon displays on LCD.
   (b) If return from calibration mode, press to exit.

Relation between TDS and conductivity

1. TDS and conductivity are linear related. The conversion factor is 0.40-1.00. Adjust per parameter setting P3.5. The factory default setting is 0.71, see Section 7.4. The meter can only be calibrated in conductivity mode and not TDS mode. After calibration of conductivity, the meter can switch from conductivity to TDS or salinity.
2. User can adjust TDS conversion factor per parameter P3.5 according to data collected during testing. See Table – 11 for some commonly used TDS conversion factors.

Table – 11 Commonly used TDS conversion factors

Sample test

1. Rinse conductivity electrode in distilled or deionized water, allow it to dry, 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  icon appears on LCD, then get the reading value which is the conductivity value of the solution.
2. Press to switch between TDS and salinity.
3. During the process of calibration and measurement, the meter has self-diagnosis functions, indicating the relative information as below, Table – 12.
   Table – 12 Self-diagnosis information of conductivity measurement mode Display Icons| Contents| Checking
   ---|---|---
   | Press when measuring value is not stable during calibration.| Press after icon displays and stays on screen
   | Wrong conductivity calibration solution or the recognition range of calibration solution| 1. Check whether conductivity calibration solution is correct.
   2. Check whether the meter connects the electrode well.
   3. Check whether the electrode is damaged.
   | During calibration, the measuring value is not stable for amin.| 1. Shake the electrode to eliminate bubbles in electrode head.
   2. Replace with a new conductivity electrode.
4. Factory default setting
   For factory default setting, please refer to parameter P3.8 (Section 7.4). All calibration data is deleted and the meter restores to the theory value. Some functions restore to the original value (refer to appendix -1). When calibration or measurement fails, please restore the meter to factory default setting and then perform re-calibration or measurement. Please note once factory default setting is set, all the data deleted will not irretrievable.

Conductivity electrode maintenance

1. Always keep the conductivity electrode clean. Before taking a measurement, rinse the electrode in distilled or deionized water and then rinse it 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. For conductivity electrode which keeps dry, soak the electrode in distilled or deionized water for 5-10 minutes. Rinse the electrode in distilled or deionized water after measurement.
2. The interaction pole of conductivity electrode is coated with platinum black to minimize electrode polarization and expand measuring range. The platinum black coating applied by a special processing technology, which improves the electrode performance.

ARAMETER SETTING

Main menu of parameter setting

In the measurement mode, Long press to enter in P1.0, then press or to switch to main menu: P1.0→P2.0→P3.0→P6.0. Please refer to Diagram – 5.

**Main menu of parameter setting

** Sub-menu of pH parameter setting

Press in P1.0, enter P1.1 sub-menu of pH parameter setting, and then press or to switch among P1.1→P1.2→P1.3.

| P1.1 — Select pH buffer series (USA—NIST—CUS)
1. Press USA icon flashes, press to select USA→nIS→CUS, press to confirm.
USA—USA series; nIS—NIST series; CUS—Customized calibration.
2. Press to enter P1.2 or press to return.
---|---
| P1.2 — Resolution （0.01—0.1）
1. Press and 0.01 flashes, Press to select between 0 .01→0.1, Press to confirm.
2. Press to enter P1.3 or press to return.
| P1.3 — Factory default setting （No—Yes）
Press , no flashes, press to select YES, press to confirm, the meter returns to measurement mode.
No— Don’t restore to factory default; Yes—Restore to factory default.

Sub-menu of ORP parameter setting

Press in P2.0, enter P2.1 sub-menu of ion parameter setting.

| P2.1 — Restore to factory default setting (No—Yes)
Press no flashes, press to select YES, press  to confirm, the meter returns to measurement mode.
No— Don’t restore to factory default; Yes—Restore to factory default.
---|---

Sub-menu of conductivity parameter setting

Press in P3.0, enter P3.1 sub-menu of pH parameter setting, and then press or to switch among P3.1→P3.2→…→P3.8.

| P3.1—Select conductivity standard solution (Std—CUS)
1. Press Std flashes, then press to select Std→CUS, press to confirm. Std—Standard series; CUS—customer defined. Factory default setting: Standard
2. Press to enter P3.2 mode or press to return.
---|---
| P3.2—Select electrode constant (1.0—10.0—0.1)
1. Press 1.0 flashes, then press to select 1.0→10.0→0.1,
Press to confirm.
2. Press to enter P3.3 or press to return.
| P3.3—Reference temperature (15.0°C~30.0°C/59.0℉~95.0℉)
1. Press 25.0°C flashes, press to adjust temperature value: 15.0~30.0°C, press to confirm. Factory default setting: 25.0°C.
2. Press to enter P3.4 mode or press to return.
| P3.4—Adjust temperature compensation factor (0.00~9.99%)
1. Press 2.00 flashes, press to adjust temperature compensation factor 0.00~9.99, press to confirm. Factory default setting: 2.00.
2. Press to enter P3.5 or press to return to measurement mode.
| P3.5—Adjust TDS coefficient (0.40~1.00)
1. Press 0.71 flashes, press to adjust TDS coefficient 0.40~1.00, press to confirm. Factory default setting: 0.71.
2. Press to enter P3.6 mode or press to return.
| P3.6 — Adjust the unit of TDS
1. Press mg/L flashes, press to select ppm→mg/L, press to confirm.
2. Press to enter P3.6 mode or press to return.
| P3.7 — Adjust the unit of salinity
1. Press ppt flashes, press to select ppt→%, press to confirm.
2. Press to enter P3.8 mode or press to return.
| P3.8 — Restore to factory default setting (No—Yes)
Press no flashes, press to select YES, press to confirm, the meter returns to measurement mode.
No— Don’t restore to factory default; Yes—Restore to factory default.

Sub-menu of basic parameter setting

Press in P6.0, enter P6.1 sub-menu of pH parameter setting, and then press or to switch among P6.1→P6.2→P6.3→P6.4.

| P6.1 — Temperature unit (℃—℉)
1. Press ℃ flashes, press to select between ℃→℉, press to confirm.
2. Press to enter P6.2 or press to return.
---|---
| P6.2 — Automatic lock-up (Off→On)
1. Press OFF flashes, press to select between OFF→On, press to confirm. Off —Unlock-up; On—lock-up（Stable reading＞10 seconds and the reading will be automatically locked up).
2. Press to enter P6.3 or press to return.
| P6.3 — Select backlight timing (1→2→3→Off)
1. Press 1 flashes, press to select among 1→2→3→OFF, press to confirm. Select Off to turn on the backlight, the time unit is minute.
2. Press to return to measurement mode.
| P6.4 — Automatic power-off setup (10→20→30→Off)
1. Press 20 flashes, press to select among 10→20→30→Off, press to confirm. Select off to turn off automatic power-off, the time unit is minute.

WHAT’S IN THE KIT?

| Content| Quantity| 35613-27| 35613-25| 35613-28| 35604-15| 35604-10| 35613-46| 35613-45
---|---|---|---|---|---|---|---|---|---
1| p1-1100 portable pH meter| 1| √| √| √| | | |
2| EC100 portable Cond. meter| 1| | | | √| √| |
3| PC100 portable pH/Cond. meter| 1| | | | | | √| √
4| Plastic pH combination electrode| 1| √| √| | | √| √| √
5| Plastic conductivity electrode| 1| | | | √| √| √| √
6| Temperature probe| | √| √| √| √| √| √| √
7| pH buffer solutions (4.00pH/7.00pH/ 10.01pH/50mL)| 1 btl each| √| | | | | √|
8| Conductivity calibration solution
(84pS /1413pS /12.85mS/ 50mL)| 1 btl each| | | | √| | √|
9| Combined electrode clip| | | | | | | √| √
10| Instruction manual| 1| √| √| √| √| √| √| √
11| Carrying case| 1| √| | | √| | √|
12| Paper box| 3.| | √| √| | √| | √

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 Environmental Express, any malfunctioned or damaged product attributable to responsibility of Environmental Express, for a period of THREE 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

Mode| Prompts| Parameter setting items| Abbreviation| Description| Restore to facto factory default setting
---|---|---|---|---|---
P1.0
pH| P1.1| Select pH buffer series| | USA – NIST – CUS| USA
P1.2| Select resolution| | 0.01 – 0.1| 0.01
P1.3| Restore to factory default
setting| | No – Yes| No
P2.0| P2.1| Restore to factory default
setting| | No – Yes| No
P3.0
Cond.| P3.1| Select conductivity
standard solution| | Std – CUS| Std
P3.2| Select electrode constant| | 1.0 – 10.0 – 0.1| 1.0
P3.3| Select reference temperature| | (15-30)°C| 25°C
P3.4| Adjust temperature
compensation coefficient| | 0.00-9.99| 0.20
P3.5| Adjust TDS factor| | 0.40-1.00| 0.71
P3.6| Select the unit of TDS| | ppm – mg/L| ppm
P3.7| Select the unit of salinity| | ppt – %| ppt
P3.8| Restore to factory default
setting| | No – Yes| No
P6.0
Basic parameter| P6.1| Select temperature unit| /| °C – ‘F| /
P6.2| Automatic lock-up| /| Off – On| /
P6.3| Select backlight timing| /| 1 – 2 – 3 – Off| /
P6.4| Automatic power-off setup| /| 10 – 20 – 30 – Off| /

Appendix – 2 Icons and Abbreviation

P1.0
pH| P1.1| | Standard buffers| pH standard buffers
P1.2| | resolution| Resolution
P1.3| | Factory default setting| Factory default setting
P2.0 ORP| P2.1| | Factory default setting| Factory default setting
P3.0
Cond.| P3.1| | Solution| Conductivity standard
solutions
P3.2| | Cell| Electrode constant
P3.3| | Reference temperature| Reference temperature
P3.4| | Temperature compensation
coefficient| Temperature compensation
coefficient
P3.5| | Total Dissolved Solid| TDS factor
P3.6| | Unit| TDS unit
P3.7| | Unit| Salinity unit
P3.8| | Factory default setting| Factory default setting
P6.0
Basic parameter| P6.1| /| /| /
P6.2| /| /| /
P63| /| /| /
P6.4| /| /| /

Appendix – 3 Table of Self-diagnosis Symbol

Replacement Sensors & Solutions

| Description| Oakton Part Number|
---|---|---|---
1| pH100 pH meter, temp probe only| 35613-28|
2| pH100 pH meter, pH, temp probes| 35613-25|
3| pH Electrode “All in One” Single Junction| 35811-71| Includes temp
4| pH Electrode “All in One” Double Junction| 35811-72| Includes temp
5| pH Electrode Replacement Single Junction| 59001-65|
6| Replacement temperature ATC probe| 35613-13|
7| pH buffer solution, 4.01, 500 mL bottle| 00654-00|
8| pH buffer solution, 7.00, 500 mL bottle| 00654-04|
9| pH buffer solution 10.01, 500 mL bottle| 00654-08|
10| PC100 portable pH/Cond. meter/probes| 35613-45|
11| EC100 Conductivity meter with probes| 35604-10|
12| Replacement conductivity electrode K= 0.1| 35606-53| Includes temp
13| Replacement conductivity electrode K=1.0| 35606-55| Includes temp
14| Replacement conductivity electrode K=10.0| 35606-57| Includes temp
15| Conductivity calibration solution 84 μS, 500 mLbottle| 00653-16|
16| Conductivity calibration solution 1413 μS, 500 mL
bottle| 00653-18|
17| Conductivity calibration solution 12.85 mS 500mLbottle| 00606-10|

Environmental Express
2345A Charleston Regional Parkway
Charleston, South Carolina 29492
Toll Free: 800-343-5319
Technical Support: 800-745-8218
Email: tech@environmentalexpress.com
Website: www.environmentalexpress.com

References

• Express - Men's & Women's Clothing
• Environmental Express
• Environmental Express

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