Apera PH20 Bedienungsanleitung
1
PH20 Value pH Tester
Instruction Manual
APERA INSTRUMENTS, LLC
www.aperainst.com
2
1. Battery Installation
Please install batteries according to the following steps. *Please note
direction of batteries: All POSITIVE SIDES (“+”) FACING UP.
(Wrong installation of batteries will cause damage to the tester
and potential hazards)
2. Keypad Functions
■Short press------- < 2 seconds
■Long press-------- > 2 seconds
1. Short press to turn on, long press to turn off;
2: When turned off, long press to enter setup;
3: In mode setting, short press to change
parameter;
1.When turned on, long press to enter calibration
mode.
2.In calibration mode, short press to confirm
calibration;
3.In mode setting, short press to confirm parameter
selection.
Diagram - 1
3
3. Complete Kit
4. Calibration
4.1 If first time use or unused for a long time, pour certain tap water in
probe cap, soak probe for about 5 minutes.
4.2 Short press to turn on. Rinse in pure water and dry it.
4.3 Long press to enter calibration mode; Short press to exit.
4.4 Soak probe in calibration solution 7.00 pH; Stir gently, leave it to stand,
LCD displays (as Diagram 3), short press , complete 1-point
calibration, tester returns to measurement mode, calibration icon
displays on button left side of LCD.
4.5 Rinse probe in pure water and dry it. Long press to enter calibration
mode, soak probe in calibration solution 4.00pH, stir gently, leave it to
stand, LCD display , short press , to complete 2 points calibration,
tester returns to measuring mode, calibration icon displays on bottom left
side of LCD ;
■Notes
a) Tester will automatically recognize pH buffer solution, user can choose
calibration points: 1point, 2points, or 3points. But 1st point calibration must
Diagram - 2
Diagram - 3
4
be in calibration solution of 7.00 pH, then followed by 2nd or 3rd point
calibration. For details, please refer to the following table:
Calibration Solution
Calibration
Indication icon
Recommended Accuracy
and Range
1-point
Calibration
7.00 pH
Accuracy ≥0.1pH
2-point
Calibration
7.00 pH and 4.00 pH
Measuring Range <7.0
pH
7.00 pH and 10.01 pH
Measuring Range>7.0
pH
3-point
Calibration
7.00 pH, 4.00 pH
and 10.01 pH
Wide measuring range
b) Automatic self-diagnostic information: if measured value is more than preset
range, LCD will display “Er1”; In calibration mode, if the measured value
hasn`t been stable, i.e. has not been displayed on LCD, pressing
will cause LCD to display “Er2”.
5. Measurement
5.1 Short press to turn on the tester. Rinse probe in pure water and dry it.
5.2 Stir probe in sample solution gently, leave it to stand. Get readings after
comes up and stays.
■Special Notes
After each use, users should rinse the pH probe thoroughly.
For the premixed pH calibration buffer solutions, we recommend replacing
them after 10 to 15 times of use to keep its accuracy.
The instruments will NOT give accurate and stable pH readings when
testing distilled or deionized water. This because distilled and deionized
water do not have enough ions present for the electrode to function
5
properly. To measure distilled or deionized water’s pH, users need to use a
specialized electrode.
Do not store probe in distilled water or deionized water because they will
cause damage to the glass membrane of the pH probe. The probe should
be stored in 3M KCL solution for best accuracy or stored without any
liquid.
6. Parameter Setting
6.1 Setting Schedule
6.2 Parameter Setting
When turned off, long press to enter setup →short press to switch
P1-P2→Short press , parameter flashing→short press to choose,
short press to confirm parameter selection→Long press to switch off.
6.3 Parameter setting instruction
Select standard pH buffer solution (P1): There are two options of standard buffer
solutions: USA series and NIST series as the following chart:
Prompt
Mark
Parameter Setting Items
Code
Factory
Default
P1
Select pH buffer
USA –NIST
USA
P2
Back to Factory Default
No –Yes
No
6
Icons
pH standard buffer solution series
USA series
NIST series
Three-Point
calibration
1.68 pH and 4.00 pH
1.68 pH and 4.01 pH
7.00 pH
6.86 pH
10.01 pH and 12.45 pH
9.18 pH and 12.45 pH
6.4 For the self-diagnosis information, please refer to the table below:
Symbol
Self-Diagnosis information
How to fix
Wrong pH calibration solution, which
exceeds the recognizable range of
the meter.
1. Check if calibration solution is correct
2. Check if probe isdamaged.
Is pushed before measurement is
stable ( comes up)
Wait for the smile icon to come up and
then press
7. Technical Specifications
pH
Range
0 - 14.0 pH
Resolution
0.1 pH
Accuracy
±0.1 pH
Calibration Points
1 - 3 points
Automatic Temperature Compensation
0 - 50℃
Temp.
Range
0 - 50 ℃
Resolution
0.1 ℃
Accuracy
±0.5 ℃
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8. Tester Functions
8.1 Calibration points indication:
8.2 Stable Measurement:
8.3 Self-Diagnostic information:：Er1, Er2
8.4 Low-Voltage warning: flashes, reminder of battery replacement
8.5 Auto Power-Off in 8 minutes if no operation.
9. 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,
LLC, any malfunctioned or damaged product attributable to responsibility of APERA
INSTRUMENTS, LLC for a period of two years from the delivery (a six-month limited
warranty applies to probes). This warranty does not apply to defects resulting from
actions such as misuse (violation of the instructions in this manual or operations in
the manner not specified in this manual), improper maintenance, or unauthorized
repairs. Warranty period is the time limit to provide free service for the products
purchased by customers, not the service life of the tester or probe.
*Apera Instruments reserves the right to update the information in this manual without giving notice in advance.
APERA INSTRUMENTS, LLC
Address: 977 Old Henderson Rd, Columbus Ohio 43220
Tel: 1-614-285-3080
Email: info@aperainst.com
Website: www.aperainst.com
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