EDT directION QP458 Manuale utente

QP458 Portable pH and

Conductivity/TDS Meter – Manual

-Power (On/Off)

-Contrast/Backlight

-Mode

-Calibrate

-Logging and Printing

-Read/Accept

-Navigate the Menu

-Set up Menu

QP458 Portable pH/mV/Conductivity/TDS Meter - Quick User Guide

Thank you for choosing the QP458 Portable pH meter from EDT directION. This guide will enable you to quickly set up and use

the instrument. The QP458 has the same functionality and specification as the QP451 pH meter and QP481 Conductivity meter

combined. It does however have the capability to measure and display pH and Conductivity simultaneously.

Description

Series 4 instruments have a dynamic LCD display which guides the user through the calibration and measurement process. We

hope there will be no need to refer to a manual once you have performed initial set up.

Unpacking

Verify you have received all the equipment ordered. If you have any questions, please contact EDT directION Ltd or your agent.

Check the package for any signs of damage. If there are any signs of rough handling in transit, please report it to the agent

immediately. Provide photographic evidence if possible. Damage should be reported within 7 days of receipt.

Note: The carrier will not honour any claims unless all shipping material is saved for their examination. Once removed save all

packing material if re-shipment is required.

Packing List:

If you ordered the QP458 Meter only option, the package will only contain the QP458 Portable Meter and 4 X AA Batteries. If

you ordered the QP458 Portable pH/mV/Conductivity/TDS Meter Kit the following items are packed in the case:

Tough carry case, QP458 Meter, 4 x AA Batteries, E8080 pH combination Electrode, ATC/Temp probe, Combined Conductivity

/Temp cell, pH 4 and 7 Buffer Solutions,1413uS Standard solution user Guide, USB data stick, Mini USB data cable.

Setting up

Battery installation.

Remove the battery cover by loosening the retaining cross head screw. Please note this screw has a retainer and will therefore

remain with the cover to prevent loss.

Once open unpack the 4 AA Batteries supplied and insert ensuring the polarity is correct for each battery. Replace the cover.

Setting the Time and Date.

1. Switch the unit on using the on/off button.

2. Press the right arrow key to enter the PARAMETERS ADJUST SCREEN

3. Scroll down to the DATE FORMAT option and press READ until you arrive at the desired format.

4. Scroll down to the CLOCK option using the down arrow key.

5. Press READ to enter the CLOCK screen.

6. Select CANCEL using the down arrow key and press READ until the current DATE in the entry box is removed.

7. Select the current date digit by digit by selecting the correct number and pressing READ.

8. When the entry box contains the correct date select ENTER and press READ.

9. You are now in the TIME screen. Repeat from 5 above to select the correct time.

10. From the PARAMETERS ADJUST screen press READ to return to the combined pH and Conductivity Mode.

(For 1-point Calibration)

Calibration and Measurement

pH Calibration

Accurate pH measurement requires that you do not cross contaminate buffers and samples. Before using the pH probe ensure it

is rinsed with deionised water and blotted dry. Repeat this procedure when transferring between all standards and samples.

1. Connect the pH Electrode to the BNC connector on the top rear of the instrument.

2. Connect the ATC probe Jack into the 3.5 mm Jack socket next to the BNC socket.

3. Press the on/off switch. The display will light up.

4. The meter is now in Combined pH and Conductivity Mode. Press MODE until you are in pH Mode.

5. The meter is now in the pH mode. Press CAL to start calibration.

6. Insert the pH Probe and ATC electrode into the pH7 Buffer solution and press READ.

7. The auto endpoint indicator will show the progress of the calibration. When stable the meter will set itself to pH

7.00 (or the corrected value)

8. To use this 1-point calibration press CAL. We recommend a 2-point calibration to do this rinse the pH Electrode and

ATC electrode with DI water, blot dry and immerse into the pH 4 Buffer solution.

9. Press READ to start the second point Calibration.

10. The auto endpoint indicator will show the progress of the calibration. When stable the meter will set itself to pH

4.00 (or the corrected value)

11. To accept the Calibration, check the Slope is over 80% and Press CAL.

12. Remove the pH Probe and ATC from the solution. Rinse with deionised water and blot dry

13. Insert the pH Probe and ATC Electrode into the sample solution and press READ

14. The auto end point will freeze the display when the reading is stable

15. For further samples repeat from 11 above

Using different or Custom Buffer solutions:

The QP458 comes complete with pH 7 and pH 4 Buffer solutions. These Buffers are automatically set up in the menu as is pH 10

Buffer. The reference temperature for these buffers is 25 Degrees C. For 20 degree C Buffers or custom values you will need to

enter the Set Up menu:

1. After switching the instrument on press MODE to get into pH Mode. Then press the right arrow set up key.

2. In the PARAMETERS ADJUST screen scroll down to “Buffer Set” and press READ

3. In the “SELECT BUFFER SET” screen select option 2 and press READ to select a pH 4,7 &10 at 20 degrees.

4. Or Select Option 3 to input custom Buffer values and Press READ

5. In the USER BUFFER SET screen select the option 1 and press right arrow

6. Press the down arrow to select CANCEL. Press READ to remove the current value.

7. To select a custom buffer, highlight the value and press READ.

8. When you have the correct value in the ENTRY box select ENTER and press READ.

9. Repeat for Custom buffers 2 and 3. Note: You can still perform 1,2 or 3 point Calibrations. i.e. you don’t have to

use all 3 buffers.

10. Press READ to return to the PARAMETERS ADJUST screen and press READ again to revert to the pH Mode.

11. To calibrate follow the Calibration procedure above.

Conductivity Calibration

Accurate conductivity measurement requires that you do not cross contaminate standards and samples. Before using the

Conductivity probe ensure it is rinsed with deionised water and blotted dry. Repeat this procedure when transferring between al

standards and samples.

1. Connect the conductivity cell into the Din connector on the top rear of the instrument.

2. Press the on/off switch. The display will light up.

3. Press MODE until the meter is in the Conductivity mode. Press CAL to start calibration.

4. Insert the probe in the standard solution (swirl with the cell if required) and press READ

5. The auto endpoint indicator will show the progress of the calibration. When stable the meter will set itself to the

calibration value.

6. Remove the cell from the solution. Rinse with deionised water and blot dry.

7. To measure a sample, press READ and then insert the probe into the sample solution (swirl if required) and press READ

8. The auto end point will freeze the display when the reading is stable

9. For further samples repeat from 6 above

Using different Calibration Standard solutions:

The QP458 comes complete with a 1413uS/cm standard solution. This standard is automatically set up in the menu. To use a

12.88mS/cm standard do the following:

1. After switching the instrument on press MODE until you are in Conductivity Mode, then press the right arrow set up

key.

2. In the PARAMETERS ADJUST screen scroll down to “Cal Standard” and press READ

3. The instrument now selects the 12.88mS standard. Scroll back up to CONTINUE and press READ.

4. Calibrate as above but using a 12.88 mS/cm standard solution.

5. To select a different standard in the PARAMETERS ADJUST screen scroll down to “Cal Standard” and press READ (once

or twice depending on the previous setting) until the “Custom Standard” page appears. Then press the right arrow key.

Ensure the “Entry” box is empty (select “Cancel” to clear a full box) and input a Custom Standard in mS/cm.

6. Select “Enter” to finish. Then scroll up to Continue and press READ.

Using Conductivity Cells with different cell constants (K value)

The instrument default is set at K=1. The actual cell constant is calculated during calibration however some applications require

the input of a cell constant as the calibration. The most common cell constants for specialist applications are K=0.1 and K=10. To

set a cell constant:

1. After switching the instrument on press MODE until you are in Conductivity Mode, then press the right arrow set up

key.

2. In the PARAMETERS ADJUST screen scroll down to “Cell Constant (K)” and press READ. You are now in the “Cell

Constant” (K) screen

3. Ensure the “Entry” box is empty (select “Cancel” to clear a full box) and input a Custom cell constant e.g. 0.1.

4. Select “Enter” to finish. Then scroll up to Continue and press READ.

Logging and printing

The QP458 Portable Conductivity and pH meter has both a log and a print function. You can print and log directly to an external

device when connected via the Mini USB output or straight to file.

Storing data and Logging.

The Series 4 instruments have a substantial internal memory which can contain up to 64 sets of results/data.

Data can be stored in the internal memory in any mode after any reading has been taken. To ensure good data integrity it is

recommended that you set up the instrument with the correct data, time and user ID details. Please refer to section 1 of this

manual. This information will be stored along with the sample readings.

Saving Sample Readings.

Once you have measured a sample in any mode and the reading is frozen you will be offered the option to “Press LOG to print

immediate”. Press “LOG” to store the reading in the internal memory. The file will be stored with the name “AD-HOC x “where x

is a sequential number that increases by 1 each time a result is recorded.

Files are accessed by:

-Press right arrow after unfreezing the display. This takes you to the “PARAMETERS ADJUST” screen.

-Select “Logging and Print set up” and press READ

-Select “REVIEW Files” and press READ

-Select the desired file and press right arrow to reveal the data.

Logging Data

The Series 4 instruments allow the continuous logging of up to 10,000 data points for up to 99 hours at intervals as small as 1

second.

To log data, it is important to “Set Up” the logging parameters:

-Press right arrow from any Mode to access the set up page.

-This takes you to the “PARAMETERS ADJUST” screen.

-Select “Logging and Print set up” and press “READ”

-Select User ID and Press “READ”

-Select the user you want to modify and press right arrow.Once finished select Enter and press “READ”

-Press “READ” to select the user.

-Select “Set Time Interval” and press “READ”. Input time interval.

-Select “Time Period to Log” and press “READ”. Input Time period.

-Select “Filename” and press “READ”. Input File Name.

-Select “CONTINUE” and press “READ”

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