APERA INSTRUMENTS PH700 Benchtop pH Meter Instruction Manual
- June 3, 2024
- APERA INSTRUMENTS
Table of Contents
PH700 Benchtop pH Meter
PH700 Benchtop pH Meter Instruction Manual
APERA INSTRUMENTS (Europe) GmbH
www.aperainst.de
Manual Version 3.2
Table of Contents
1 Brief Introduction ……………………………………………………………………………………………………- 1 1.1 Main
Features …………………………………………………………………………………………………- 1 –
2 Technical Specifications ………………………………………………………………………………………….- 2 –
3 What’s in the Box? …………………………………………………………………………………………………- 1 –
4 Instrument Description ……………………………………………………………………………………………- 2 4.1 LCD
Display ……………………………………………………………………………………………………- 2 4.2 Keypad
…………………………………………………………………………………………………………..- 3 4.3
Connectors……………………………………………………………………………………………………..- 4 4.4 Stable reading
display mode ……………………………………………………………………………..- 4 4.5 Data storage, recall, and
deletion ……………………………………………………………………….- 4 4.6 Max/Min Function
…………………………………………………………………………………………….- 5 –
5 pH Measurement……………………………………………………………………………………………………- 5 5.1
Preparation……………………………………………………………………………………………………..- 5 5.2 pH Electrode
Information …………………………………………………………………………………..- 5 5.3 Information regarding
Calibration………………………………………………………………………..- 6 5.4 pH Meter
Calibration…………………………………………………………………………………………- 8 5.5 Measuring pH
………………………………………………………………………………………………….- 9 5.6 Parameter Setting
…………………………………………………………………………………………. – 11 5.7 pH Electrode’s
Maintenance…………………………………………………………………………….- 12 –
6 mV measurement…………………………………………………………………………………………………- 13 6.1 ORP
measurement…………………………………………………………………………………………- 13 6.2 Notes on ORP
measurement……………………………………………………………………………- 13 –
7 Recommended pH Electrodes for Specific Applications ……………………………………………..- 14
–
8 Warranty …………………………………………………………………………………………………………….- 14 –
1 Brief Introduction
Thank you for purchasing Apera Instruments PH700 Benchtop pH meter.
This instrument is an outstanding combination of advanced electronics design
and sensor technology. It’s the most economical choice of a reliable lab-grade
benchtop pH meter. Please read this maual carefully to properly use and
maintain the meter. Apera Instruments reserves the right to update the
contents of this manual without giving prior notices. 1.1 Main Features
· The meter has a built-in microprocessor chip, which enables intelligent
functions such as automatic calibration, automatic temperature compensation,
data storage, parameter setup, max/min reading display, etc.
· The advanced automatic calibration mode has calibration guide and self-
diganosis functions, automatically recognizing standard buffer solutions (USA
or NIST series).
· The advanced digital processing technology intelligently improves the
meter’s response time and measuring accuracy with stable reading display mode
available.
· The kit comes with a 3-in-1 combination pH Electrode, measuring pH and
temperature simultaneously.
· IP54 dustproof and spillproof. Connectors are protected by silicone seal
caps, effectively ensuring the reliability and service life of the meter under
harsh environment.
· Detachable electrode holder and 3 bottles of pH buffer solutions come with
the kit for convenient use.
2 What’s in the Box?
Content 3.1 PH700 Benchtop pH Meter 3.2 201T-F Plastic 3-in-1 Combination pH Electrode 3.3 pH standard buffer solutions (4.00/7.00/10.01 pH) 3.4 9V Power Adapter 3.5 Electrode Holder 3.6 Instruction Manual
Quantity 1 1 1 for each 50ml 1 1 set 1
– 1 –
3 Technical Specifications
Range Resolution
pH
Accuracy
Temperature
Compensation
Calibration
Range
mV
Resolution
Accuracy
Range
Temp.
Resolution
Accuracy
Data Storage
Storage Content
Others
Power
IP Ratings
Size and Dimension
0 to 14.00 pH 0.01/0.1 pH ±0.01 pH ±1 digit
0 to 100 °C (Auto or Manual)
1 to 3 points automatic calibration ±1999 mV 1 mV
±0.1% F.S ±1 digit 0 to 100°C; 32 to 212°F
0.1°C; 0.1/1°F ±0.5°C ±1 digit
50 groups Numberings, Measurement, Unit, Temperature, Temperature
Compensation Status DC9V/300mA
IP54 dustproof and spillproof (240235103) mm/1kg
4 Instrument Description 4.1 LCD Display
Figure-1
(1) — Measurement value (2) — Calibration icons and numberings
– 2 –
(3) — Measurement unit (4) — Temperature and reminder icons (5) — The pH unit
displayed during calibration (6) — The pH value displayed during calibration,
numberings for storage and recall, and
reminder icons (7) — Icons for data storage and recall — M+: store measuring
data; RM: Recall measuring data (8) — Self-Diagnosis icons and numberings (9)
— Temperature compensation mode icons:
ATC: Auto Temperature Compensation; MTC: Manual Temperature Compensation (10)
— Completed calibration icons (11) — Stable reading icon (12) — Icons for
maximum and minimum values
4.2 Keypad
3.2.1. Keypad operations Short press —– <1.5 seconds; Long press —– >1.5 seconds. 3.2.2 For keypad operation, please see Table-1.
Keypad
Table 1 Keypad operations and descriptions
Operation
Functions
Short Press · Power on/off
Short Press · Select measuring mode: pHmV.
Long Press · Enter parameter settingP1P2…P4.
Short Press
· ·
Short Press
· ·
Enter Calibration mode Cancel any operation and go back to measurement mode
In calibration mode, press to conduct calibration In parameter setting, press
to confirm selection
Short Press · Store measuring data
Long Press · Recall stored measuring data
·
Short Press or
·
Long Press ·
In manual temperature compensation mode, short press to change temperature,
long press to change quickly
In parameter setting mode, short press to change parameter and settings.
In recall mode, short press to change numberings, long press to change
quickly.
Short Press · Buttons for max/min values (refere to section 3.6)
– 3 –
4.3 Connectors
Symbol REF
pH/mV TEMP DC9V
Connector Name Socket for reference electrode Socket for pH and ORP electrode
Socket for temperature sensor
DC9V power socket
Connector Type 2 banana type
BNC RCA 2.5 direct type
4.4 Stable reading display mode When the measuring value is stable, smiley face icon appears on LCD, see Figure-3. Please do not get the reading value or make calibration until the icon appears and stays.
4.5 Data storage, recall, and deletion
Storage
When the measurement is stable, press
key, the meter displays
M+ icon and storage numberings on LCD and stores the measuring data.
In Figure-4, the meter stores the first group of the measuring data. Press
again, to keep storing.
Figure – 3 Figure – 4
Recall stored data
In the measurement mode, long press
key to recall the last stored
Measuring data. The meter displays RM icon and storage numberings.
In Figure-5, the meter is recalling the 28th stored measuring data.
Keep pressing
and
to recall the stored measuring data
successively. Press and hold and to quickly recall the stored
measuring data. Short press
to go back to measurement mode.
Figure – 5
Clear stored data
The meter can store 50 groups of data. Once the storage is full, if user
presses
again, the FUL icon will be displayed on LCD (see Figure-
6).
– 4 –
Figure – 6
The storage needs to be cleared in parameter setting P4 so as to keep storing data. The numberings in M+ indicates the total number of stored data; The numberings in RM indicates the number of stored data in current mode (ph/mV). For example, if 20 groups of data is stored in pH mode, and 10 groups in mV mode, then the numberings for M+ will be “M+30” in both pH and mV mode; the numberings for RM in pH mode would be “RM20”, in mV mode “RM10”.
4.6 Max/Min Function
Use this function to display the maximum or minimum records out of groups of measuring data. In
measurement mode, press
, LCD will display flashing icons of “MAX/MIN”, indicating the meter
has entered the mode of recording maximum and minimum data. After testing, press
again,
LCD will alternately display the maximum and minimum value in the past measurements. Press
to go back to regular measurement mode.
5 pH Measurement
5.1 Preparation Install the electrode holder The electrode holder is composed
of a metal stand base, a supporting pole, and an electrode clip. First,
install the metal stand base to the meter (screw it on). Please note that the
metal base can be installed on either side of the meter. Then install the
supporting bar on the metal stand base, and then install the electrode clip on
the supporting bar. Connect the power adapter Plug the power adapter tightly
into the DC9V socket. The power’s voltage should meet the requirements listed
on the power adapter. Things needed in addition to what’s included in the box
A clean cup, distilled water (8-16oz), and tissue papers for rinsing and
drying the probe.
5.2 pH Electrode Information pH Electrode The meter comes with the 201T-F
3-in-1 combination electrode with a built-in temperature sensor, which enables
the automatic temperature compensation. This electrode is only suitable for
regular water solutions’ pH testing. Please refer to Section 7 for ideal pH
electrodes to use for other specific applications. The electrode’s housing
adopts polycarbonate materials, which is resistant to shocks and corrosion. A
3M KCL storage bottle comes with the electrode, which is for storing the
electrode when not in use to keep the sensitivity of the probe.
– 5 –
Technical Specifications of the 201T-F pH Electrode Measurement Range: 0 – 14
pH, 0 – 80°C (32 176°F) Junction: Single Ceramic Reference Electrode:
Ag/AgCl Connector: BNC/RCA Size: ø12*160 mm Temperature unit: 30K Thermistor
Electrode Connectors The pH electrode has two connectors: the BNC connector
connects the pH probe; the RCA connector connects the temperature sensor. Plug
these two connectors into `pH/mV” and “TEMP” sockets. Please note not to pull
the cables in case of poor contact. Please keep the connectors clean and dry.
Refer to section 4.7 regarding how to properly maintain the pH electrode.
Use the Electrode
Screw off the KCL storage bottle and put it aside (do not dump or spill the
KCL solution). Prepare a cup of distilled water and rinse the electrode in it
for a few seconds. Gently shake the probe to remove excess water and dry it
with clean tissue paper (DO NOT rub or wipe the probe, just use paper to dap
off excess water). Gently stir the electrode for a few seconds after it’s
dipped into the test solution and then let it stand still. Wait for the stable
measurement (a smiley face appears and stays) and then record the readings.
When test is finished, place the electrode in the storage bottle and tighten
the cap in order to keep the sensitivity of the pH sensor.
5.3 Information regarding Calibration
pH buffer solutions
The meter has 2 series of standard buffer solutions: USA and NIST (see Table-2). They can be
selected in parameter P1 (see 4.6.1).
Table-2
Calibration icon
pH standard buffer series
USA
NIST
3-Point calibration
1.68 and 4.00 pH 7.00 pH 10.01 pH
1.68 and 4.01 pH 6.86 pH 9.18 pH
– 6 –
3-Point Calibration
The meter can adopt 1 to 3 points of calibration. The 1st point must be using
7.00 pH (or 6.86 pH) buffer solution, and then choose other buffers to do 2nd
point and 3rd point. Please refer to Table-3 for details. In the process of
calibration, the slope of acidity range and alkalinity range will be
displayed, which indicates the health of your probe. The closer the slope is
to 100%, the better the condition of the probe is.
USA
Table-3 Calibration Mode
NIS
Calibration icon
When to adopt
1-Point Calibration
7.00 pH
6.86 pH
accuracy ±0.1 pH
2-Point Calibration
7.00 pH and 4.00/1.68 pH
7.00 pH and 10.01 pH
3-Point Calibration
7.00pH, 4.00/ 1.68 pH and 10.01
pH
6.86 pH and 4.01/1.68 pH
6.86 pH and 9.18 pH
6.86pH, 4.01/ 1.68pH, 9.18 pH
Measuring range: 0 to 7.00 pH
Measuring range: >7.00 pH
Wide measuring range
How often to calibrate The frequency that you need to calibrate your meter
depends on the tested samples, condition of electrodes, and the requirement of
the accuracy. For High-Accuracy meaustements ( ±0.02pH), the meter should be
calibrated before test every time; For ordinary-accuracy measurements
(±0.1pH), once calibrated, the meter can be used for about a week or longer.
In the following cases, the meter must be re-calibrated: a) The electrode
hasn’t been used for a long time or a new electrode is connected. b) After
measuring strong acid (pH<2) or strong base (pH>12) solutions. c) After
measuring fluoride-containing solution and strong organic solution d) There is
a significant difference between the temperature of the test sample and the
temperature
of the buffer solution that is used in the last calibration.
– 7 –
5.4 pH Meter Calibration
- Press
to enter calibration mode. CAL1 icon will flash in the
upper right corner of the LCD. 7.00 pH will flash in the lower right corner of the LCD, reminding you to use pH 7.00 buffer to conduct 1st point of
calibration.
- Use distilled water to rinse off electrode and then dry it (with a tissue).
Dip it into pH 7.00 buffer solution, stir gently and let it stand still and wait
for the reading to become stable. In the lower right corner of LCD, the
process of auto recognizing the buffer solution will be displayed.
Pressing
before the buffer is recognized will generate Er2 (please
refer to table 5).
- When the meter locks 7.00 pH in the lower right corner, stable
icon
displays on LCD. Then press
key to calibrate the meter.
End icon appears after calibration is done. The 1st point calibration is finished. In the meanwhile, CAL2 will flash at
the upper right corner, and 4.00 pH & 10.01 pH will flash alternately at
the bottom right, indicating using pH4.00 or pH10.01 buffer solution to make the 2nd point calibration.
- Take out the pH electrode, rinse it in distilled water, dry it, and dip it into pH 4.00 buffer solution. Stir the solution gently and let stand still in the buffer solution until a stable reading is reached. The meter’s display will show the recognition process of calibration buffer solution at the
lower right corner. When the meter recognizes 4.00 pH, stable
icon
displays on LCD. Press
key to calibrate the meter. End icon and
electrode slope of acidity range will be displayed after calibration is
done. In the meanwhile, CL3 will flash at the upper right corner of the
LCD, and 10.01 pH will flash at the lower right, indicating using pH10.01
buffer solution to make the 3rd point calibration.
- Take out pH electrode, rinse it in distilled water, dry it, and dip it into pH 10.01 buffer solution. Stir the solution gently and let it stand still in the buffer solution until a stable reading is reached. The meter’s display will show recognition process of calibration buffer solution at the bottom right of
Figure-7
LCD. When the meter recognizes 10.01 pH, stable
icon displays on LCD. Press
calibrate the meter. End icon and electrode slope of alkalinity range
key to
display after calibration is done. The meter returns to the measurement mode,
the calibration icons
– 8 –
L M H will be displayed. Please see Figure-7 for the above calibration process.
- During the calibration process, press
key to exit from the calibration mode. The meter can
perform one-point, two-point and three-point calibration. Calibration guide icons appear on LCD.
5.5 Measuring pH Screw off the KCL storage bottle, and put it aside (do not dump or spill the KCL solution). Prepare a cup of distilled water, and rinse the electrode in it for a few seconds. Gently shake the probe to remove excess water, and dry it with clean tissue paper or Kimwipes (DO NOT rub or wipe the probe, just use paper to dap off excess water). Gently stir the electrode for a few seconds after it’s dipped into the test solution and then let it stand still. Wait for the stable measurement (a smiley face icon
appears and stays) and then record the readings. Please refer to Figure-8 for
calibration and measurement process of the pH meter.
Figure-8 Calibration and measurement process of pH meter
Press
to
turn on the meter.
Press key to enter the calibration mode.
Submerge the electrode in pH7.00 solution, press
key when icon appears.
After the 1st point
calibration is done,
press
key to
enter the
measurement mode.
1st point calibration
Submerge the electrode in pH4.00
solution, press
key when
icon
appears.
Submerge the electrode in pH10.01
solution, press
key when
icon
appears.
After the 2nd point
calibration is done,
press
key to
enter the
measurement mode.
2nd point calibration
Sample Test
After the 3rd point calibration is done, the meter enters the measurement mode automatically.
3rdpoint calibration
Notes:
- This default 201T-F electrode will NOT give accurate and stable pH readings when testing purified water such as distilled or deionized water. This because those water do not have enough ions present for the electrode to function properly. To measure distilled or deionized water’s pH, users need to use a specialized pH electrode with the meter such as LabSenTM 803 Pure Water pH Electrode. Contact us at 1-614-285-3080 for more details. When testing purified water like spring water or drinking water, it will take longer for the readings to get stabilized (typically 3-5 minutes) because there is very few ions left to be detected by the sensor in those purified water.
- Purified water such as distilled water and deionized water are recommended
for only
– 9 –
rinsing the probe for the best result. 3) The 201T-F pH Electrode is NOT
suitable for testing high-temperature samples (>176°F).
Testing high-temperature samples could cause permanent damage to the
electrode. A specialized electrode such as LabSenTM 213 (up to 225°F) should
be used in this situation. 4) The electrode housing is polycarbonate. When
using cleaning solutions, take cautions on carbon tetrachloride,
trichlorethylene, tetrahydrofuran, acetone, etc., which will dissolve the
housing and invalidate the electrode.
5.5.1 According to the pH isothermal measurement principle, the closer the test sample’s temperature is to the calibration solution’s, the higher the accuracy of the measurement. This principle is recommended to follow when conducting tests for the best result. Example: If users were to test samples at 150°F, we recommend warming up the calibration solutions to the same temperature before performing calibrations in order to get the most accurate readings. 5.5.2 The instrument has a function to return to factory default setting, which can be set up in P5 (refer to section 5.6). Returning to factory default setting is to restore the meter to theoretical value (zero potential pH is 7.00, slope is 100%), and set all the parameters to default settings. When the meter’s calibration or measurement is performing abnormally, users can use this function to let the meter return to factory default mode, and then conduct calibration and test again. Please note that this function is irreversible once used. 5.5.3 Self-Diagnosis In the process of calibration and measurement, the meter has a self-diagnosis function. Please see table 5.
Display Icons
Table 5 Self-diagnosis Information
Contents
Wrong pH buffer solution or the buffer solution is out of range.
pH electrode zero electric potential out of range (<-60mV or >60mV)
pH electrode slope is out of range (<85% or >110%) Press key when reading is
not stable during calibration.
During calibration, the measuring value is not stable for 3min.
How to fix
1. Check whether pH buffer solution is correct. 2. Check whether the meter
connects the
electrode properly. 3. Check whether the electrode is damaged. 4. Make sure
there is no bubble in the
electrode’s bulb.
1. Make sure there is no bubble in the electrode’s bulb.
2. Check whether the electrode is damaged. 3. Check if pH buffer solutions
are correct. 4. The pH Electrode is aged. Replace a new
one.
Press
key when icon appears and
stays on the screen.
1. Make sure there is no bubble in the electrode’s bulb.
2. Check whether the electrode is damaged. 3. The pH Electrode is aged.
Replace a new
one.
– 10 –
- If you find any air bubble in the glass bulb of the pH sensor, simply shake the probe for a few times to remove it. The existence of an air bubble in the glass bulb will significantly decrease the stableness of measurement.
5.6 Parameter Setting
Symbol
Parameter setting content
Parameter
Factory default setting
P1
Select pH buffer series
USA – NIST
USA
P2
Select resolution
P3
Select temperature unit
0.1/0.01 pH –
0.01 pH
P4
Clear stored data
No-Yes
No
P5
Return to factory default
No-Yes
No
5.6.1 How to do the parameter setting:
In measurement mode, long press
to enter parameter setting P1. Then press to change
menu from P1 to P2…P5. For details, please see Table-7.
Table-7 pH Parameter Setting
P1 — Select pH buffer series (USA– NIS)
1. Long press
to enter P1.
2. Press , USA flashes, press to select USA or NIS, press to confirm; USA — USA SeriesNIS — NIST Series
3. Press
to enter P2 or press
measurement mode.
to return to
P2 — Select resolution (0.01–0.1) 1. Press , 0.01 flashes, press
to confirm;
2. Press to enter P3 or press mode.
to select 0.01 or 0.1, press to return to measurement
P3 — Select temperature unit (°C–°F)
1. Press , °C flashes, press to select °C or °F, press
to confirm.
2. Press to enter P4 or press
to return to measurement
mode.
P4 — Clear stored data (No–Yes) 1. Press , “No” flashes, press
to confirm;
2. Press to enter P5 or press mode.
to select No or Yes, press to return to measurement
P5 — Restore to factory default setting (No–Yes)
1. Press , “No” flashes, press to select No to Yes, press
to confirm; The meter returns to measurement mode.
2. If not selecting “Yes”, press
to return to measurement mode.
– 11 –
5.7 pH Electrode’s Maintenance 5.7.1 Daily maintenance The soaking solution contained in the supplied protective bottle is used to maintain activation in the glass bulb and junction. Loosen the cap, take out the electrode and rinse in distilled or water before taking a measurement. Insert the electrode and tighten the cap after measurements to prevent the solution from leaking. If the soaking solution is cloudy or moldy, replace the 3M KCL solution.
- We DO NOT recommend using other brand’s soaking solution, since different chemicals can be used and potential damage can be caused to the electrode)
- The electrode should NOT be soaked and stored in purified or distilled water, protein solution, acid fluoride solution, or organic lipids. Distilled water or purified water is only recommended for rinsing electrodes.
5.7.2 Calibration buffer solution For calibration accuracy, the pH of the standard buffer solution must be reliable. The buffer solution should be refreshed often, especially after heavy use. We recommend 10-15 times of use before replacing the pH buffers.
5.7.3 Protect glass bulb The sensitive glass bulb at the front of the combination electrode should not come in contact with hard surfaces. Scratches or cracks on the electrode will cause inaccurate readings. Before and after each measurement, the electrode should be rinsed with distilled water or purified water. If a sample sticks to the electrode or it’s contaminated, the electrode should be thoroughly cleaned using a soft brush with soap water and then rinsed with distilled water. After that, soak it in the KCL solution again for at least 6 hours.
5.7.4 Renew glass bulb Electrodes that have been used over a long period of time will become aged. Submerge the electrode in 0.1mol/L hydrochloric acid 24 hours, then rinse the electrode in distilled water, then submerge it in KCL soaking solution for 24 hours. The method to prepare 0.1mol/L hydrochloric acid: dilute 9mL hydrochloric acid in distilled water to 1000mL. For serious passivation, submerge the bulb in 4% HF (hydrofluoric acid) for 3-5 seconds, and wash it in distilled water, then submerge it in the soaking solution for 24 hours to renew it.
– 12 –
5.7.5 Clean contaminated glass bulb and junction (please refer to Table-8)
Table-8 Clean contaminated glass bulb and junction
Contamination
Cleaning Solutions
Inorganic metal oxide
Dilute acid less than 1mol/L
Organic lipid
Dilute detergent (weak alkaline)
Resin macromolecule Proteinic haematocyte sediment
Paints
Dilute alcohol, acetone, ether Acidic enzymatic solution (saccharated yeast
tablets) Dilute bleacher, peroxide
6 mV measurement
6.1 ORP measurement
Press
key, and switch the meter to mV measurement mode. Connect ORP electrode (the
301Pt-C combination ORP electrode is sold separately) and dip it in sample solution, stir the solution
briefly and allow it to stay in the solution until
icon appears and get the reading.
ORP means Oxidation Reduction Potential. The unit is mV.
6.2 Notes on ORP measurement
6.2.1 ORP measurement does not require calibration. When the user is not sure about ORP
electrode quality or measuring value, use ORP standard solution to test mV value and see whether
ORP electrode or meter works properly. Table-9 is the data of standard ORP solution for 222 mV.
Table-9
°C
10
15
20
25
30
35
38
40
mV
242
235
227
222
215
209
205
201
6.2.2 Clean and activate ORP electrode After the electrode has been used over
a long period of time, the platinum surface will get polluted which causes
inaccurate measurement and slow response. Please refer to the following
methods to clean and activate ORP electrode: (a) For inorganic pollutant,
submerge the electrode in 0.1mol/L dilute hydrochloric acid for 30 minutes,
then wash it in distilled water, then submerge it in the soaking solution for
6 hours. (b) For organic or lipid pollutant, clean the platinum surface with
detergent, then wash it in distilled water, then submerge it in the soaking
solution for 6 hours. (c) For heavily polluted platinum surface on which there
is oxidation film, polish the platinum surface with toothpaste, then wash it
in distilled water, then submerge it in the soaking solution for 6 hours.
– 13 –
7 Recommended pH Electrodes for Specific Applications
Application Regular water solutions Beverage, beer, or wine analysis
Ideal Apera pH Electrodes to Use with PH700 Meter 201T-F, LabSen 213 LabSen 213
Cosmetics
LabSen 851-1, (MP500 temp. probe required)
Dairy products (milk, cream, yogurt, mayo, etc.)
LabSen 823
High-Temperature liquid Low-temperature liquid Meat
LabSen 213 LabSen881 (MP500 temp. probe required) LabSen 763
Micro sample testing
LabSen 241-6, LabSen 241-3 (MP500 temp. probe required)
Purified Water (Low ion concentration samples)
LabSen 803, LabSen 813
Soil
LabSen 553
Solid or semi-solid samples (cheese, rice, fruit, etc.)
LabSen 753
Strong acid samples Strong alkalined samples Surface test (skin, paper, carpet, etc.) Titration TRIS buffer solutions Viscous liquid samples Wastewater or emulsion
LabSen 831 (MP500 temp. probe required) LabSen 841 (MP500 temp. probe required) LabSen 371 (MP500 temp. probe required) LabSen 223 LabSen 213, LabSen 223 LabSen 223, LabSen851-1 LabSen 333
8 Warranty
We warrant this instrument to be free from defects in material and workmanship
and agree to repair or replace free of charge, at option of APERA
INSTRUMENTS(Europe) GmbH, any malfunctioned or damaged product attributable to
responsibility of APERA INSTRUMENTS(Europe) GmbH for a period of TWO YEARS
(SIX MONTHS for the probe) from the delivery. This limited warranty does not
cover any damages due to: Transportation, storage, improper use, failure to
follow the product instructions or to perform any preventive maintenance,
modifications, combination or use with any products, materials, processes,
systems or other matter not provided or authorized in writing by us,
unauthorized repair, normal wear and tear, or external causes such as
accidents, abuse, or other actions or events beyond our reasonable control.
APERA INSTRUMENTS (Europe) GmbH
Wilhelm-Muthmann-Straße 18, 42329 Wuppertal Germany Email: [email protected]
|ww.aperainst.de | Tel. +49 202 51988998
– 14 –