BOQU PHS-1705 User manual
Laboratory 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 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............................................................................... 5
2.3 Temperature measurement..................................................................... 6
2.4 Parameter setting......................................................................................6
2.4.1 Standard buffer solution groups setting..........................................7
2.4.2 Mannual temp-compensation setting..............................................7
2.4.3 Temperature unit setting................................................................. 7
2.4.4 Voice prompt setting.......................................................................7
2.4.5 Printout setting................................................................................ 8
2.4.6 Clear storage data............................................................................8
2.5 Restore factory setting............................................................................. 8
2.6 Data storage.............................................................................................. 8
2.6.1 Store the reading............................................................................. 8
2.6.2 View storage data............................................................................9
2.7 Data printing.............................................................................................9
2.8 Error message......................................................................................... 10
3 Maintenance......................................................................................11
3.1 Meter maintenance................................................................................... 11
3.2 Electrode maintenance............................................................................. 11
4 Technical Indexes............................................................................. 13
5 Buffer solution groups......................................................................14
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1.Introduction
Thank you very much for your 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 be due to spark formation or immersion in
gas corrosion caused by the risk of explosion).
When using chemicals and solvents, follow the operating
instructions and experiments provided by the supplier room safety
procedures to operate!
Operators operate safety precautions
Do not separate the housing of the instrument, allowing only
professional service personnel to repair the instrument!
Please avoid the following environmental factors:
Violent shaking
Long in the sunshine
Atmospheric humidity more than 85%
The presence of corrosive gases
Ambient temperature below 5 ° C or more than 40 ° C
Strong electric field or magnetic field
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1.2 Display and button
1. Electrode state (see 5.2 for electrode maintenance)
Good Normal Bad
2. Measurement icon
3. Electrode calibration icon
4. Print (data send out) icon
5. Parameter setting icon
6. Electrode slope or pH/mV reading
7. Read the stability icon/automatic end point icon
8. MTC manual/ATC automatic temperature compensation/measurement process
temperature/Reference temperature value during calibration/electrode calibration
of the zero bias voltage
9. Error Index/Storage Data Index/Calibration Point/Buffer Group
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Button description：
Button
Short press
Long press
( 3 seconds)
(OK)
Read
Confirm setting
Set the end point
(Calibration)
Calibration
Calibration data recall
(ON/OFF)
Turn on/ Exit
Turn off
(Store/Exit)
Measurement data
storage
/Exit
View storage data
(Mode)
Mode switch
Decrease value
-------
(Setup)
Parameter setting
Increase value
-------
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2. Operation
2.1 Calibration
2.1.1 Buffer solution groups
The instrument can be calibrated for 1, 2 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 electrode 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 preselected end point or
press the "OK" button.
2.1.2.2 Save the calibration results
After measuring the value is stable, press the "OK" button, the instrument shows
the zero and slope, automatically returned to the measurement screen.
Note:
When performing a little calibration, only zero is adjusted. If the electrode is
over-calibrated before, its slope will be saved, otherwise the theoretical slope
(-59.16mV/pH) is taken. Press the "CAL" button, the meter will display the slope
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and zero value, and then the instrument returns to the measurement screen.
2.1.3 Two point calibration
Step 1 Perform one point calibration as described in 2.1.2.1.
(Do not press the "OK" button after the instrument's automatic end point or
manual end point, otherwise it will return to the measurement state.)
Step 2 Rinse the electrode with deionized water.
Step 3 Place the electrode in the next calibration buffer and press the "CAL"
button to start the next calibration.
After the signal is stabilized, the instrument will automatically end according to
the preselected end point or press the "OK" button.
Step 4 Refer to 2.1.2.2
2.1.4 Three point calibration
As in 2.1.3 for 3-point calibration.
Note:
It is recommended to use a temperature probe or an electrode with a built-in
temperature probe. 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.
2.2 Sample measurement
Place the electrode in the sample solution and press the "OK" button to start the
measurement, and the decimal point on the screen flashes. The automatic
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measurement end point A is the default setting for the instrument. When the
electrode output is stable, the display is automatically fixed and the pH of the
sample solution is displayed.
Press and hold the "OK" button, can switch between automatic and manual
measurement mode end. To manually measure an end point, press the "OK"
button to display the value.
pH and mV measurement stability based on: If the signal changes within 6
seconds is not greater than 0.1mV, the instrument will reach the end of the
measurement.
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 probe. When using the temperature probe, the screen
displays the ATC symbol and the sample temperature.
Note: This instrument uses only the NTC30k temperature probe.
2.4 Parameter setting
Press the "Setup" key to enter the parameter setting mode, press "Setup"/"Mode"
to select the desired setting parameters,
Press "Exit" to exit the parameter setting mode, return to the measurement mode;
Press "OK" to enter the corresponding parameter setting page, press the
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"Setup"/"Mode" to adjust the parameters,
Press "Exit" to exit the corresponding parameter setting page, return to the
parameter setting mode;
2.4.1 Set the buffer solution group
Appears "bUF", press "OK" to enter the set buffer solution group mode
Note: Appendix 5.1 is a built-in buffer solution group.
Default: 1
2.4.2 Manual temperature compensation setting
"MTC" appears, press "OK" to enter the manual temperature compensation
setting mode
Note: When the instrument does not detect the temperature probe, it will
automatically switch to manual temperature compensation mode, and display
MTC.
Default: 25 ℃
2.4.3 Temperature unit setting
"TU" appears, press "OK" to enter the temperature unit setting mode
Default: ℃
2.4.4 Voice prompt setting
"BUZ" appears, press "OK" to enter the voice prompt setting mode
Default: ON (with voice prompt).
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