Kensington KS-PH-220-BASIC User manual

User Manual
KS-PH-220-BASIC | Portable
pH/mV Meter
Kensington Scientific
22a Cavan Rd, Dry Creek
South Australia, 5094
[e-mail]
www.kensingtonscientific.com.au
OVERVIEW
Below are the steps you need to follow to begin using your Kensington KS-PH-220-BASIC portable pH/mV meter. This
manual provides a step-by-step guide to help you operate the meter.
METER CONTENTS
The following are included as standard accessories of the KS-PH-220-BASIC:
1. E201-BNC pH Electrode
2. TP-100K Temperature Probe
3. pH Buffer Solutions (pH4.01/7.00/10.01)
4. 9V Battery
5. Carrying Case
DISPLAY
The KS-PH-220-BASIC is built with a large and clear LCD display that shows measured values, mode indicators and
notifications. The following table describes the meaning of each icon on the screen.
Measurement mode indicator:
Indicates meter is in measurement mode
Memory mode indicator:
Indicates data is tired into memory
Calibration mode indicator:
Indicates meter is in calibration mode
Low Battery Alarm:
When the battery is depleted the indicator will
appear
Setup mode indicator:
Indicates meter is in SETUP mode
Automatic Temperature Compensation:
Indicates meter is in temperature compensation
mode

User Manual
KS-PH-220-BASIC | Portable
pH/mV Meter
Kensington Scientific
22a Cavan Rd, Dry Creek
South Australia, 5094
[e-mail]
www.kensingtonscientific.com.au
KEYPAD
The KS-PH-220-BASIC has six (6) multi-function keys. Below are their names and functions
Key
Description
1. Press this button to activate HOLD function
2. Freezes the measured value on the display, press the key again to resume measuring.
3. In the calibration or setting mode, exits current mode and returns to measurement.
Press to enter SETUP mode
Press to activate temperature setting mode
1. In the measurement modem press this key to store current measured value.
2. In the temperature setting mode, pressing the key increases the value by 0.1. Press and hold the
key to increase the value by 1.
3. In memory mode, press to search the previous saved measurements
1. In the measurement mode, press this key to recall stored data in the memory
2. In the temperature setting mode, press to search the next stored data
1. Toggles between pH and mV measurement modes
2. In the setup mode, press this key to confirm option or input values.
CONNECTING THE pH ELECTRODE
1. Take out the pH electrode from the carrying case.
2. Insert the connector of the electrode into the BNC connector socket on the meter. Rotate and push the connector
until it locks.
3. Do not pull on the sensor cord once the electrode is connected to the meter.
USER SETTINGS
SELECTING THE TEMPERATURE UNIT
1. Press SETUP key to enter the setup menu
2. Press or key to select the ‘Temperature Units’ option
3. Press ENTER key to confirm. The ‘C’ indicator should begin flashing.
4. Press or keys to select the desired temperature units (°C or °F)
5. Press ENTER to confirm.

User Manual
KS-PH-220-BASIC | Portable
pH/mV Meter
Kensington Scientific
22a Cavan Rd, Dry Creek
South Australia, 5094
[e-mail]
www.kensingtonscientific.com.au
SETTING THE REAL TIME CLOCK
1. Press SETUP key to enter the setup menu.
2. Press or key to select ‘Date and Time’ option.
3. Press ENTER key to confirm, the date digit will then start to flash
4. Press or key to set the data and press ENTER to confirm. The hour digit will then start to flash
5. Press or key to set the time and press ENTER to confirm. The settings are now saved and the meter will then
return to measurement mode.
TEMPERATURE COMPENSATION
Temperature compensation is needed to make accurate measurement results. You need to choose between automatic
and manual temperature compensation before measurement or calibration.
AUTOMATIC TEMPERATURE COMPENSATION
1. Automatic temperature compensation will readily activate when the temperature probe is inserted into the meter’s
phone jack.
2. Insert the connector of the temperature probe into the meter’s phone jack
3. The ‘ATC’ indicator should immediately show on the display, indicating that automatic temperature compensation is
now enabled.

User Manual
KS-PH-220-BASIC | Portable
pH/mV Meter
Kensington Scientific
22a Cavan Rd, Dry Creek
South Australia, 5094
[e-mail]
www.kensingtonscientific.com.au
MANUAL TEMPERATURE COMPENSATION
1. Do not connect the temperature probe if manual temperature compensation is desired.
2. Press the ‘C’ key to enter the manual temperature setting mode.
3. Press ENTER to confirm and the meter returns to measurement mode. Setting is now complete.
CALIBRATION OF THE TESTER
The KS-PH-220-BASIC needs to be calibrated prior to first use or when a new sensor is installed in the meter. Regular
calibration is needed to ensure accurate pH measurement.
The KS-PH-220-BASIC can perform two points calibration. For the first calibration point, the pH 7.00 buffer solution is
used.
The solution used for the second calibration point depends on the sample to be measured. For acidic samples, the pH
4.01 buffer solution should be used. For alkaline samples, the pH 10.01 buffer solution should be used.
For the KS-PH-220-BASIC, only pH pouches are included and the user must prepare the solutions. Do not recycle
used calibration solutions.
PREPARATION OF PH BUFFER SOLUTIONS
1. The KS-PH-220-BASIC comes with three pH buffer solution pouches: pH 7, pH 10.01 and pH 4.01
2. Open one of the pouches and place it into a 250 ml volumetric flask. Add in distilled water to match the scale line.
3. Mix the solution until it is dissolved.
4. Repeat the procedures for the other pouches that will be used during calibration.
CALIBRATION PROCESS
1. Begin by preparing the needed buffer solutions.
2. Rinse the pH electrode with distilled water.
3. Press the SETUP key to access the setup menu.

User Manual
KS-PH-220-BASIC | Portable
pH/mV Meter
Kensington Scientific
22a Cavan Rd, Dry Creek
South Australia, 5094
[e-mail]
www.kensingtonscientific.com.au
3. Press ENTER and the display should automatically show the calibration indicator and ‘7.00’
4. Dip the pH electrode into the pH 7.00 buffer solution. The end of the electrode must be completely submerged
in the solution. Stir the senor gently.
5. Press ENTER to confirm and wait for the measurement to stabilize as the reading will automatically flash 3 times.
6. The first calibration point is now completed. The display will then show ‘---‘’, indicating the start of the second
calibration point.
7. Begin the second calibration point by rinsing the pH electrode with distilled water.
8. Dip the electrode into either the pH 4.01 or pH 10.01 solution. Stir the sensor gently.
9. Press ENTER to confirm and wait for the measurement to stabilize as the reading will automatically flash 3 times.
10. The meter will then display the electrode slope and the returns to measurement mode.
REMINDERS DURING CALIBRATION
1. If the meter displays ‘Err’ during the calibration process, please check that the pH electrode is properly mounted and
that the used buffer solutions are fresh or uncontaminated.
2. You can exit the calibration process anytime by pressing the MEAS key to return to measurement mode.

User Manual
KS-PH-220-BASIC | Portable
pH/mV Meter
Kensington Scientific
22a Cavan Rd, Dry Creek
South Australia, 5094
[e-mail]
www.kensingtonscientific.com.au
USING THE METER AND OTHER FUNCTIONS
pH MEASUREMENT
1. Press ENTER key until the display shows measurement unit ‘pH’.
2. Rinse the pH electrode with distilled water to remove impurities.
3. Dip the electrode into the sample solution, stir the sensor gently.
4. Wait for the measured value to stabilize and record the reading on the display.
mV MEASUREMENT
1. Press ENTER key until the display shows measurement unit ‘mV’.
2. Rinse the pH electrode with distilled water to remove impurities.
3. Dip the electrode into the sample solution, stir the sensor gently.
4. Wait for the measured value to stabilize and record the reading on the display.
HOLD FUNCTION
The data hold function is used to freeze the measured value on display. During measurement mode, press the
HOLD key. The ‘HOLD’ indicator should appear on the display. Press HOLD again to release the measured reading
and continue to make measurements.
STORING AND RECALLING DATA FROM MEMORY
The KS-PH-220-BASIC has enough memory to store 50 data sets. Two functions involved with using the meter’s
memory are memory input and memory recall.
MEMORY INPUT
1. In measurement mode, press SAVE to save the measured value into the memory. The ‘Memory’ indicator should
appear on the display.
2. If the memory is full, the oldest value stored will be erased to create for the new value.

User Manual
KS-PH-220-BASIC | Portable
pH/mV Meter
Kensington Scientific
22a Cavan Rd, Dry Creek
South Australia, 5094
[e-mail]
www.kensingtonscientific.com.au
MEMORY RECALL
1. Press the VIEW key in measurement mode. The display should show the ID number, data and time of the stored
data.
2. Press the key to scroll down on the stored data, showing either the pH or mV reading and temperature.
3. To exit, press MEAS key to return to measurement mode.
ELECTRODE CARE AND MAINTENANCE
1. Clean as necessary depending on the extent and condition of use. Store the electrode in electrode storage solution
after cleaning or after use.
2. When used in samples with salt deposits: Wash the electrode using tap water and then rinse using distilled water.
3. When used in samples with oil and grease: Was the bulb gently in water with detergent. Using alcohol is also
effective.
4. Clogged reference junction: Heat a diluted KCl solution to 60 to 80 °C and place the senor into the heated solution
for 10 minutes. Allow the electrode to cool in some unheated KCl solution.
5. For solutions with protein deposits: Prepare a 1% pepsin solution in 0.1M of HCL. Place the electrode in the solution
for 10 minutes. Rinse the sensor with distilled water
PREPARATION OF THE ELECTRODE STORAGE SOLUTION
1. Dissolve 22.365 grams of potassium chloride reagent (KCL) in the 100mL distilled water.
2. Pour the 50mL of KCL solution into the beaker.
3. Pour the 50mL of pH4.01 standard buffer solution into the same beaker.
4. Stir the solution until the solution has thoroughly mixed. Preparation is completed.

User Manual
KS-PH-220-BASIC | Portable
pH/mV Meter
Kensington Scientific
22a Cavan Rd, Dry Creek
South Australia, 5094
[e-mail]
www.kensingtonscientific.com.au
SPECIFICATIONS
pH
Range
-2.00~16.00 pH
Accuracy
± 0.01 pH
Resolution
0.01 pH
Calibration points
2 points
Calibration solutions
USA (pH4.01/7.00/10.01)
Temperature compensation
0~100°C, 32~212°F, Manual or
Automatic
mV
Range
-1999~1999 mV
Accuracy
± 1 mV
Resolution
1 mV
Temperature
Range
0~100°C, 32~212°F
Accuracy
± 1°C
Resolution
1°C
Others
Hold function
Manual
Memory
50 data sets
Output
USB interface
Connector
BNC
Power requirements
1× 9V/800mA Battery
Dimensions
185(L)× 88(W)× 32(H)mm
Weight
300g