PEAK INSTRUMENTS P-510 User manual

User Manual PEAK INSTRUMENTS INC
Address: 16223 Park Row, Houston, TX-77084, USA. Website: www.peakii.com. Tel: [phone]
P-510 pH Meter
User Manual
PEAK INSTRUMENTS INC
Version 1801

User Manual PEAK INSTRUMENTS INC
Address: 16223 Park Row, Houston, TX-77084, USA. Website: www.peakii.com. Tel: [phone]
CONTENTS
I. General Information....................................................................................................1
II. Specifications .............................................................................................................2
III. Device Instructions....................................................................................................3
1. Display indicators ................................................................................................3
2. Operation Keys....................................................................................................3
3. Save, view and delete data. ................................................................................4
IV. pH Measurement ......................................................................................................5
1. Preparations.........................................................................................................5
2. Calibration...........................................................................................................5
3. pH Solution Measurement..................................................................................6
4. Parameter setup..................................................................................................7
4.1. Table of pH meter parameter setup..........................................................7
4.2. Manual temperature compensation setting(P1) ......................................7
4.3. Resolution setting(P2)...............................................................................7
4.4. pH standard buffer setting(P3) .................................................................8
4.5. Temperature unit setting(P4)....................................................................8
4.6. Pure water or ammonia pure water compensation setting(P5)...............8
4.7. Auto shutdown timer setting of backlight(P6)..........................................9
4.8. Auto shutdown timer setting of the device(P7) .......................................9
4.9. Restore default settings(P8)......................................................................9
5. Notes.................................................................................................................10
6. Self-diagnosis information ................................................................................11
V. mV measurement .....................................................................................................12
VI. Packing list.............................................................................................................12

User Manual PEAK INSTRUMENTS INC
Address: 16223 Park Row, Houston, TX-77084, USA. Website: www.peakii.com. Tel: [phone]
1
I. General Information
Thanks for using P-510 pH meter. In order to help you operate and maintain the
instrument properly, please read the user manual before using it. We reserve the rights
to update the manual and its parts subject to the purpose of improving the
instrument’s performance.
This instrument combines the technologies of advanced electronics, sensors and
software design, which can be used to test the pH value, temperature and other
parameters of water solutions. This portable tablet pH meter is very suitable for
industrial and mining enterprises, power plant, environment protection, etc.,
especially suitable for outdoor purpose.
This pH meter has built-in microprocessor chip with beautiful design, variable
functions and the following features:
1. Built-in microprocessor chip, with automatic calibration, automatic or manual
temperature compensation, data storage, function settings, automatic shutdown and
low voltage alarm and other intelligent functions. Easy to use.
2. Digital filtering and slip techniques are used to improve meter’s response speed and
data accuracy. The symbol of “ ” is displayed when the measured value is stable.
3. Equipped with new type of pH electrode and temperature probe and have
automatic and manual temperature compensation functions, which make the
measurement more accurate and operation easier.
4. Automatic recognition of 15 buffers with three kinds of options: European & USA,
NIST and China. Support 1, 2 or 3 point calibration.
5. The circuit board adopts Surface Mounted Technology to improve the reliability of
product processing.
6. White backlit LCD screen.
7. IP57 waterproof and dustproof.

User Manual PEAK INSTRUMENTS INC
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II. Specifications
pH
Measuring Range
(-2.00～19.99) pH
Resolution
0.1/0.01 pH
Accuracy
Electrode: ±0.01pH, Instrument: ±0.02 pH
Input Current
≤2×10-12 A
Input Impedance
≥1×1012 Ω
Stability
±0.01 pH/3h
Temperature
Compensation
(0～100)℃(automatic/manual)
mV
Measuring Range
-1999 mV～0～1999 mV
Resolution
1mV
Accuracy
±0.1%FS
Others
Data Storage
150 sets
Storage Contents
Series number, measuring value, unit,
temperature
Power
Two pieces of AA battery
Size & Weight
165×90×32 mm/310g
Certificate
ISO, CE
Working Conditions
Ambient
Temperature
5～35℃
Humidity
≤85%
IP Grade
IP57

User Manual PEAK INSTRUMENTS INC
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III. Device Instructions
1. Display indicators
① Parameter mode tag
② Measurement value
③ Data storage and replay number and symbol. Indicator of special status. M+ is
symbol for data storage. RM is data replay icon.
④ Measurement unit
⑤ Temperature and unit
⑥ Stability symbol
⑦ Calibration indicators
⑧ Low voltage symbol, when the voltage is lower than 2.6V, the symbol will be shown
to remind customer for battery change.
2. Operation Keys
There are seven operating buttons
2.1. On/off button, it is used to switch on/off the device in measuring mode.
This key is not working in other modes.
2.2. Calibration key.
2.2.1. Press this button to enter calibration mode in measuring mode.
2.2.2. Press this key to back in other modes.
2.3. Function key. In measuring mode, short press(less than 1.5 seconds) this

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key to change measuring unit between pH and mV.
2.4. Backlight and delete key.
2.4.1. In measuring mode, short press(less than 1.5 seconds) this key to turn on or off
backlit.
2.4.2. When viewing saved data, long press(more than 5 seconds) this key to delete
saved data.
2.5. Increase and data view key. Decrease and data saving key.
2.5.1. In measuring mode, short press(less than 1.5 seconds) to save records,
short press(less than 1.5 seconds) to view saved records.
2.5.2. and are used to change parameters under setting mode.
2.6. Set and Confirm/return key
2.6.1. In measuring status, long press(more than 2 seconds) to enter parameter
settings.
2.6.2. Short press(less than 1.5 seconds) to confirm current selection in other status.
3. Save, view and delete data.
3.1. Data save. In measuring status, when the reading is stable and shows symbol ,
short press(less than 1.5 seconds) to save records, the screen will show “M+”
and storage number. The device can save 150 sets of records totally.
3.2. Data view.
3.2.1. In measuring status, short press(less than 1.5 seconds) to view the
newest saved record of the current unit, and right upper corner will show symbol “RM”.
Continue press or to replay all saved records.
3.2.2. In view status, press to return to measuring mode.
3.3. Delete data
In data viewing mode, long press (more than 5 seconds) and screen displays
for two seconds, which means all saved data is deleted already and back to

User Manual PEAK INSTRUMENTS INC
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measuring mode.
IV. pH Measurement
1. Preparations
1.1. Press to switch on device, then press to choose pH measuring
mode.
1.2. Check if the glass bulb of pH combined electrode is moist and complete. If the
bulb is broken, then the electrode will not work, if the bulb is too dry, it should be
soaked in saturated KCL solution for 24 hours.
1.3. Connect pH electrode and temperature probe to its right ports.
2. Calibration
2.1. Press to enter calibration mode, the screen will show C1 to indicate first
point calibration.
2.2. Wash pH and temperature electrodes in pure water and make them dry, dip the
electrode in the pH 6.86 buffer solution, shake the electrode and let it be static until
the reading is stable (the symbol will be shown on the screen), then press
and display shows 6.86, next press to confirm the first point calibration, the
screen will show C2 to indicate second point calibration or press to quit
calibration mode.
2.3. Wash pH and temperature electrodes in pure water and wave them dry, dip the
electrode in the pH 4.00 buffer solution, shake the electrode and let it be static until
the reading is stable (the symbol will be shown on the screen), then press
and display shows 4.00, next press to confirm the second point calibration, the
screen will show C3 to indicate the third point calibration or press to quit
calibration mode.
2.4. Wash pH and temperature electrodes in pure water and make them dry, dip the
electrode in the pH 9.18 buffer solution, shake the electrode and let it be static until

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the reading is stable(the symbol will be shown on the screen), then press
and display shows 9.18, next press to confirm the third point calibration and quit
calibration mode and enter measuring mode, “ ” will be shown on the right
bottom and means the instrument is calibrated at three points.
2.5. Calibration instructions
2.5.1. This instrument has one point, two point or three point calibration, after the first
point calibration is finished, press to quit calibration mode and enter measuring
mode, “ ” will be shown on the left bottom. When measurement accuracy is no
more than ±0.1pH, choose one buffer solution to calibrate one point is enough
according to the measurement range.
2.5.2. When the second point calibration is finished, press to quit calibration
mode and enter measuring mode, the symbol of two point calibration “ ” will
be shown on the bottom left screen. If you only measure acidic solutions, then choose
pH 4.0 & 6.86 buffers for calibration. If you only measure alkaline solutions, then
choose pH6.86 & 9.18 buffers for calibration.
2.5.3. If the measurement range is wide or the pH electrode is ageing after a long time,
three point calibration is required, which will lead to higher accuracy. For the first time
use of a new pH electrode, it must be calibrated at three points and adjust the slope
of the instrument same as the pH electrode.
3. pH Solution Measurement
Wash the pH electrode & temperature electrode and wave them dry, put them into
the solution, shake the electrode and let it be static, then wait until the reading is
stable and the symbol appear on the screen, then the reading is its pH value.
NOTE: Based on principle of isothermal measurement, the closer of the temperature
of tested solution with that of buffer solution, the more accurate of the measurement,
please obey this rule when doing the test.

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4. Parameter setup
4.1. Table of pH meter parameter setup
4.2. Manual temperature compensation setting(P1)
4.2.1. Long press to enter set mode
Then press to enter P1.
4.2.2. Press or to change temperature. Long press these keys to
change the figures continuously. Press to confirm the change and back.
4.2.3. Press to enter next parameter setting or press to back to
measuring mode.
4.3. Resolution setting(P2).
4.3.1. Press to choose P2 in mode P1,
Then press to enter P2.
4.3.2. Press or to select resolution between 0.1 and 0.01. Press
to confirm the change and back.
Indicator
Description
Remarks
P1
Manual temperature compensation
setup
(0-99.9)℃
P2
pH resolution setup
0.1pH/0.01pH
P3
pH buffer setup
CH, USA, NIST
P4
Temperature unit setup
℃℉
P5
Ammonia pure water compensation
setup
OFF, ON
P6
Backlight time closing setting
0-20min or 0 stands for this
function is not working
P7
Automatic shutdown time setting
0-20min or 0 stands for this
function is not working
P8
System restore setup
OFF or ON

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4.3.3. Press to enter next parameter setting or press to back to
measuring mode.
4.4. pH standard buffer setting(P3)
4.4.1. Press to choose P3 in mode P2,
Then press to enter P3.
4.4.2. Press or to select buffer standard. There are three standards:
USA, NIST and China. Press to confirm the change and back.
4.4.3. Press to enter next parameter setting or press to back to
measuring mode.
CH: 1.68 pH, 4.00 pH, 6.86 pH, 9.18 pH, 12.46pH
NIST: 1.68 pH, 4.01 pH, 6.86 pH, 9.18 pH, 12.45pH
USA: 1.68 pH, 4.00 pH, 7.00 pH, 10.01 pH, 12.45pH
4.5. Temperature unit setting(P4)
4.5.1. Press to choose P4 in mode P3,
Then press to enter P4.
4.5.2. Press or to select temperature unit ℃/℉. Press to
confirm the change and back.
4.5.3. Press to enter next parameter setting or press to back to
measuring mode.
4.6. Pure water or ammonia pure water compensation setting(P5)
4.6.1. Press to choose P5 in mode P4,
Then press to enter P5.
4.6.2. Press or to select compensation mode, “OFF” mean no
compensation, “H2O” mean pure water compensation, “NH3” mean ammonia pure

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water compensation. Press to confirm the change and back.
4.6.3. Press to enter next parameter setting or press to back to
measuring mode.
4.7. Auto shutdown timer of backlight(P6)
4.7.1. Press to choose P6 in mode P5,
Then press to enter P6.
4.7.2. Press or to choose auto shutdown time of backlight. Press
to confirm the change and back.
4.7.3. Press to enter next parameter setting or press to back to
measuring mode.
4.8. Auto shutdown timer setting of the device(P7)
4.8.1. Press to choose P7 in mode P6,
Then press to enter P7.
4.8.2. Press or to set the automatic shutdown time of the device.
Press to confirm the change and back. “0” means disabling this function.
4.8.3. Press to enter next parameter setting or press to back to
measuring mode.
4.9. Restore default settings(P8)
4.9.1. Press to choose P8 in mode P7,
Then press to enter P8.
4.9.2. Press or to choose “ ” and confirm by pressing and “888”

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blinks on the screen, which means it is restored to default settings. Press to back
to measuring mode.
4.9.3. Be careful to use this function, because all saved data will be removed once
restored to default settings.
5. Notes
5.1. Times to be calibrated depend on test sample, electrode and measurement
accuracy. For high accuracy test (≤±0.02pH), it should be calibrated in time with high
accuracy buffers. For normal accuracy measurements (≥ ±0.1pH), after being
calibrated one time, it can be used for one week or even longer.
5.2. The instrument should be calibrated again in the following situations.
5.2.1. For new electrode and the one that has not been used for a long time.
5.2.2. After testing strong acidic solution(pH<2) or strong alkaline solution(pH>12).
5.2.3. After testing fluoride solution or high concentration organic solution.
5.2.4. The temperature difference is big for the tested solution and calibration solution.
5.3. There is electrode immersion solution in the protection bottle where the electrode
probe is soaked and used to keep glass bulb moist and liquid interface activated. When
to use it, just rotate the bottle cap, take out the electrode and wash it clean. After use,
put it back to the bottle and tighten the bottle cap to prevent solution leaking. If the
immersion solution is turbid or mouldy, please clean the bottle in time and change
soaked liquid.
5.4. It is forbidden to be soaked long time in pure water, protein solution and acidic
fluoride solution, and no contact with organic fat.
5.5. In order to increase measurement accuracy, the pH value of the standard buffer
must be accurate which is used to calibrate the instrument.
5.6. Keep the instrument clean and dry, especially for the connection interfaces,
otherwise the measurements will not be accurate or wrong.
5.7. The glass bulb can’t touch solid things, any bulb damage will cause the electrode
failure. The electrode should be washed before and after using it, then wave or absorb
it dry, don’t wipe it with paper tissue which will make the electric potential unstable
and prolong response time. After the use in viscous sample, the electrode should be
washed for a few time in order to remove sample stuck to the surface, or use suitable
solvent to clean it.
5.8. After long use, the electrode will be passivated because the bulb is polluted or the
liquid interface is blocked, which will make the electrode sensitive gradient lower,

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response slow, reading inaccurate. The following methods could be used in different
situations.
5.8.1. The glass bulb is passivated: Soak the bulb in 0.1mol/L dilute hydrochloric
acid(add pure water into 9ml hydrochloric acid to 1000ml) for 24 hours, wash it with
pure water, then soak it in electrode immersion solution for 24 hours. If passivation is
serious, put the glass bulb in 4%HF (hydrofluoric acid) for 3-5 seconds, wash it with
pure water, then soak it in electrode immersion solution for 24 hours.
5.8.2. Reference cleaning of glass bulb and liquid interface.
Contaminant
Detergent
Inorganic metal oxide
Less than 1mol/L dilute hydrochloric acid
Organic fat
Dilute detergent(alkalescent)
Resin polymer substance
Dilute alcohol, acetone, aether
Protein blood cell sediment
Acid enzyme solution(like Saccharated Yeast
Tablets)
Pigment substance
Dilute bleach solution, hyperoxide
5.9. pH electrode can usually be used for one year, if the working conditions are very
bad, being misused or in improper maintenance, its lifespan will be shortened. If the
electrode is passivated or not working well, please replace it.
5.10. When the instrument is abnormal, please set P7 and restore default settings,
then do the calibration and test.
6. Self-diagnosis information
The following symbols may appear during daily use, it is the self-diagnosis information
which helps you understand some problems of the electrode or instrument.
6.1. Static -2.00 pH or -19.99pH means the measured value exceeds its measuring
range. When electrode is not connected properly or in the air, it could happen and is
normal.
6.2. “ ” means electrode zero potential is excess(<-60mv or >60mv).
6.3. “ ” means electrode slope is excess(<50% or >105%). When the above error
symbols appear, please do the following examinations.
6.3.1. Check if there are bubbles in the electrode bulb, if yes, please wave them away.
6.3.2. Check if the buffers spoil or there is big error for the buffers.
6.3.3. Restore the instrument to default settings and recalibrate it.
If the above methods can’t solve the problems, please change the pH electrode.

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V. mV measurement
1. Press to switch on the instrument, press to choose mV measuring
mode
2. Connected to ORP or ion composite electrode(optional). Wash it and wave it dry,
put them into tested solution, stir the electrode and let it be static, then wait until the
reading is stable and the symbol appear on the screen, then the reading is its mV
value.
VI. Packing list
Description
Number
P -510 pH meter
1 unit
pH electrode
1 piece
Temperature electrode
1 piece
Standard buffers(4.00, 6.86, 9.18pH)
1 set
AA Battery
2 pieces
User manual
1 copy
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