BOQU PHS-1701 Manuale utente

Portable pH Meter

User Manual

Content

1 Introduction....................................................................................- 1 -

1.1 Safety precautions..................................................................................- 1 -

1.2 Display and button.................................................................................- 2 -

2 Operation........................................................................................- 4 -

2.1 Calibration............................................................................................- 4 -

2.1.1 Standard buffer solution groups........................................... - 4 -

2.1.2 One point calibration............................................................ - 4 -

2.1.3 Two point calibration........................................................... - 5 -

2.1.4 Three point calibration......................................................... - 5 -

2.2 Sample measurement...........................................................................- 6 -

2.3 Temperature measurement................................................................ - 6 -

2.4 Parameter setting.................................................................................- 6 -

2.4.1 Standard buffer solution groups setting................................- 6 -

2.4.2 Mannual temp-compensation setting....................................- 7 -

2.4.3 Temperature unit setting.......................................................- 7 -

2.4.4 Prompt sound setting............................................................- 7 -

2.4.5 Remove storage data............................................................ - 7 -

2.4.6 Automatic turn off setting.................................................... - 7 -

2.5 Restore factory setting.........................................................................- 8 -

2.6 Data storage..........................................................................................- 8 -

2.6.1 Storage data reading............................................................. - 8 -

2.6.2 Storage data checking...........................................................- 9 -

2.7 Error message.................................................................................... - 11 -

3 Maintenance................................................................................. - 12 -

3.1 Meter maintenance........................................................................ - 12 -

3.2 Electrode maintenance.................................................................. - 12 -

4 Technical indexes......................................................................... - 14 -

5 Standard buffer solution groups................................................ - 15 -

-1-

1 Introduction

Thank you very much for purchase of our company's high-quality pH meter, good

ease of use, is our product's consistent pursuit.

1.1 Safety precautions

Operator protective measures

Do not work in an explosive environment! Because the instrument

case is not airtight

(May cause an explosion hazard due to corrosion caused by spark

formation or immersion in gas)。

When using chemicals and solvents, follow the operator's operating

instructions and laboratory safety procedures!

Operators operate safety precautions

It is forbidden to separate the shell of the instrument, only allow

the company to appoint a professional service personnel to repair

the instrument!

Please avoid the following environmental factors：

1. Violent shaking

2. Under sunshine for long time

3. Atmospheric humidity more than 85%

4. The presence of corrosive gases

5. Ambient temperature below 5 ° C or higher than 40 ° C

6. Strong electric field or magnetic field

- 2 -

1.2 Display and button

1. Electrode status（electrode maintenance pls see 5.2）

Good Normal Bad

2. Continued boot icon

3. Electrode measurement icon

4. Electrode calibration icon

5. Parameter setting icon

6. Battery status icon

7. Electrode slope or pH/mV reading

8. Reading stable / automatic end point icon

9. The temperature in the measurement process / the reference temperature

during calibration / the zero calibration of the sensor calibration

10. Error index / calibration point / standard buffer solution

-3-

Button description：

Button

Short Press

Long Press

（3 seconds）

（Reading）

—Reading

—Confirm setting

—Set the end

point

（Calibration）

—Calibration

data is echoed

（ESC）

—ESC

—Turn on

—Turn off

（Store）

—Measuring data storage

—Up key to select a value

—View storage

data

（Mode）

—Mode

—Down key to select a value

—Setting

- 4 -

2. Operation

2.1 Calibration

2.1.1 Standard buffer solution groups

The instrument can be calibrated for 1 point, 2 point or 3 points. During

calibration, the meter automatically recognizes the pH of the standard buffer

solution. The automatic temperature compensation procedure is solidified in the

meter (see appendix).

The instrument has 8 sets of buffer solution (see appendix). The settings for the

buffer solution group refer to 2.4.1.

2.1.2 One point calibration

2.1.2.1 Calibration

Place the sensor in the buffer and press the "Cal" button to start the calibration.

The calibration icon will be displayed. After the signal is stabilized, the instrument

will automatically end according to the pre-selected end point or press the "Read"

button.

2.1.2.2 Store calibration result

After measuring value stable, press “Read” button, meter will display zero point

and slope, and automatically return to measurement interface.

Note：

When doing one point calibration, only zero point was adjusted. If sensor made

multi points calibration before, it’s slope will be reserved, otherwise the theory

-5-

slope (-59.16mV/pH) will be adopted. Press “Cal” for a long while, meter will

display slope and zero point, and then return to measurement interface.

2.1.3 Two point calibration

First step Press one point calibration according to 2.1.2.1。

(After the instrument's automatic end point or manual end point, do not press the

"Read" key, otherwise it will return to the measurement state)

Second step Wash electrode with distilled water。

Third step Put electrode in the second buffer solution, and pree “Cal” start the

second point calibration.

After the signal is stabilized, the instrument will automatically end according to

the preselected end point or press the "reading" key.。

Fourth step Pls see 2.1.2.2

2.1.4 Three point calibration

Process three point calibration according to 2.1.3.

Note：

It is recommended to use a temperature probe or an sensor with a built-in

temperature sensor. If the MTC (manual temperature compensation) mode is used,

all buffers and sample solutions should be kept at the same set temperature.

In order to ensure accurate pH readings, calibration should be performed

periodically.。

- 6 -

2.2 Sample measurement

Place the electrode in the sample solution and press the "Read" button to start the

measurement, and the decimal point on the screen flashes. The automatic

measurement end point (with the A icon display) is the default setting for the

meter. When the result is stable, the decimal point is no longer flashing, and there

is a display on the screen.

Press and hold the "Read" button to switch between automatic and manual

measurement end mode. To manually measure an end point, press the "Read" key

to display the value.

To view the mV value during the pH measurement, simply press the "Mode"

button to execute the mV (ORP) measurement, according to the same steps as the

pH measurement.

2.3 Temperature measurement

To improve accuracy, we recommend using a temperature probe or an electrode

with a built-in temperature sensor. When using the temperature electrode, the

screen displays the ATC symbol and the sample temperature.

Note：This meter only match with NTC30k temperature sensor。

2.4 Parameter setting

Press the "Mode" button to enter the parameter setting mode.

Press "Store" / "Mode" to select the parameters to be set;

Press "ESC" to exit the current setting mode and return to the previous mode;

-7-

Press "Read" to enter the corresponding parameter settings page, press "Store" /

"Mode" to adjust the parameters.

2.4.1 Standard buffer solution groups setting

Display “BUF”, press “Read” enter into standard buffer solution setting mode.

Note：Please refer to Appendix 5.1 for a total of 8 groups of buffer sets.

Default：1（NIST）

2.4.2 Manual temp-compensation setting

Display “MTC”，press “Read” enter into manual temp-compensation setting mode.

Note：When the meter does not detect the temperature sensor, it will

automatically switch to manual temperature compensation mode, and display

MTC.

Default：25 ℃。

2.4.3 Temperature unit setting

Display “TU”，press “Read” enter into temperature unit setting mode.

Default：℃。

2.4.4 Prompt sound setting

Display ”BUZ”，press “Read” enter into prompt sound setting mode

Default:ON (with sound prompt).

2.4.5 Remove stored data

Display“MR CLr”，press “Read” enter into remove the stored data mode.

Display “Read” to confirm，display “MR nUL”，indicates clear success，

Automatically exit this setting; press "ESC" to exit this setting.

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