Lutron Electronics PH-222 User manual
PEN pH METER
Your purchase of this PEN pH METER
marks a step forward for you into the field
of precision measurement. Although this
meter is a complex and delicate instrument,
its durable structure will allow many years
of use if proper operating techniques are
developed. Please read the following
instructions carefully and always keep this
manual within easy reach.
TABLE OF CONTENTS
1. FEATURES................................................................ 1
2. SPECIFICATIONS......................................................
.
1
3. FRONT PANEL DESCRIPTIONS...................................4
3-1 Display............................................................... 4
3-2 Power ( Logger, ) Button.................................
.
▲4
3-3 Hold ( Enter, CAL ) button ...................................4
3-4 REC ( / button, ) Button............................℃℉ ▼ 4
3-5 pH electrode ( Temp. sensor )..............................4
3-6 Battery compartment/Cover................................ 4
3-7 Protection cover................................................ 4
3-8 pH 7.00 buffer solution, PH-07A...........................
.
4
3-9 pH 4.00 buffer solution, PH-04A...........................
.
4
4. pH CALIBRATING PROCEDURE..................................
.
5
4-1 Calibrating Consideration......................................5
4-2 Requiring Equipment for Calibration......................5
4-3 Calibration procedures.........................................
.
5
5.MEASURING PROCEDURE..........................................
.
10
5-1 pH measurement.................................................10
5-2 Data hold............................................................11
5-3 Data record ( Max., Min. reading )........................
.
11
5-4 Change Temp. unit , ....................................
.
℃℉ 12
6.DATA LOGGER..........................................................
.
12
6-1 Save data........................................................... 12
6-2 Call data.............................................................
.
13
6-3 Delete data ( Empty the memory )........................14
7. REPLACEMENT OF BATTERY......................................15
8. REPLACEMENT OF pH ELECTRODE.............................15
9. OPTIONAL ACCESSORIES..........................................16
1. FEATURES
* Pen type digital pH meter, all in one, pH electrode is
included, easy for general purpose application.
* Build in temperature sensor, ATC ( auto temperature
compensation ).
* pH 4, pH 7 standard solution are standard accessories.
* Easy to change the pH electrode.
* Temperature measurement, , .℃℉
* IP67, water proof and protection.
* Auto calibration for pH 4, pH 7 or pH 10 or other value.
* High input impedance.
* LCD with two displays and bar graph indicator.
* Data hold function for freezing the desired value.
* Auto power off.
* Records max. and min. value with recall.
* 100 point data logger with recall.
* Microcomputer circuit, intelligent function, high accuracy.
* Compact size, light weight.
* Power supply by DC 1.5 V battery ( UM4/AAA ) x 4 PCs,
* Available for wide applications, such as aquarium,
beverage, fish hatcheries, food processing,
photography, laboratory, quality control, school &
colleges, swimming pools, water conditions.
1
2. SPECIFICATIONS
Display LCD, size : 20 mm x 28 mm.
* With bar graph indicator.
Measurement pH 0 to 14 pH.
Range Temp. -5 to 80 ( 23 to 176 ).℃℉
Resolution pH 0.01 pH.
Temp. 0.1 / 0.1 .℃℉
Accuracy pH ± 0.02 pH
* After calibration, meter
without PE-12 electrode.
±0.2pH
* After calibration, meter
with PE-12 electrode.
Temp. ± 0.8 / ± 1.5 .℃℉
pH Input 10^12 ohms.
Imped
a
pH Electrode Included
.
* PE-12
pH Temp. ATC ( Automatic temperature
Compensation compensation ), build thermister Temp.
sensor.
Data Hold Freeze the display reading.
Memory Recall Maximum & Minimum value.
Sampling Approx. 0.8 second.
Time
pH pH 7, pH 4 or pH 10, 3 points
Calibration calibration ensure the best linearity and
accuracy.
*
Other calibration point that near the
pH 7, pH 4, and pH 10 are available.
2
Data Logger Max. can save 100 point data with recall.
Manual, push the data logger button
once will save data one time.
Circuit Custom one-chip of microprocessor LSI
circuit.
Operating Meter :
Temperature 0 to 60 ( 32 to 140 ).℃℉
pH electrode :
-5 to 80 ( 23 to 176 ).℃℉
Operating Less than 80% RH.
Humidity
Power Supply DC 1.5V battery ( UM-4/AAA ) x 4 PCs.
Power Approx. 4.8 mA.
Consumption
Dimension 186 x 40 x 32 mm
( 7.3 x 1.6 x 1.3 inch ).
*Meter with pH electrode.
Weight 131 g/0.36 LB (included electrode).
Power off Auto power shut off to save battery life.
Standard Instruction Manual.........................
.
1 PC
Accessories pH electrode, PE-12.......................
.
1 PC
pH 7.00 buffer solution, PH-07A...... 1 PC
pH 4.00 buffer solution, PH-04A...... 1 PC
* PE-12, PH-07A, PH-04A are the
consumer accessory.
Optional pH ELECTRODE, Model : PE-12
Accessories pH 7.00 buffer solution, Model : PH-07A
pH 4.00 buffer solution, Model : PH-04A
Hard carrying case, Model : CA-06
Soft carrying case, Model : CA-52A
* refer page 16
3
3. FRONT PANEL DESCRIPTION
3-1 Display
3-2 Power ( Logger, ) Button▲
3-3 Hold ( Enter, CAL ) button
3-4 REC ( / button, ) Button℃℉ ▼
3-5 pH electrode +Temp. sensor, PE-12
3-6 Battery compartment/Cover
3-7 Protection cover
3-8 pH 7.00 buffer solution, PH-07A
3-9 pH 4.00 buffer solution, PH-04A
4
4. pH CALIBRATING PROCEDURE
4-1 Calibrating Consideration
The pH meter already calibrated by mV signal that
simulated from the ideal pH ELECTRODE mV output
( base on 25 environment ). However due to (a) An℃
ideal electrode will produce 0 mV at pH 7.00, but most
electrodes are slightly off. (b) The measuring environment
temperature may not near 25 ( 15 to 35 ).℃℃
If intend to keep instrument combined electrode within
high accuracy, it is necessary to make the following
calibration procedures ( 4-3 ).
* Basic calibration ( single point calibration ) :
pH 7 calibration.
* Complete calibration ( two points calibration ) :
pH 7 calibration and pH 4 calibration.
* During execute the calibration procedures,
if the Display show " Error " information, then please
do the " Calibration clear " procedures, refer page 8.
4-2 Requiring Equipment for Calibration
1)Combination pH electrode ( PE-12, included ).
2)Buffer solutions :
pH 7.00 buffer solution ( PH-07A, included ).
pH 4.00 buffer solution ( PH-04A, included ).
4-3 Calibration procedures
pH 7 calibration
1)Rinse the electrode in distilled water.
2)Power on the instrument by pressing the " Power button "
( 3-2, Fig. 1 ).
3)Press the " Hold button " ( 3-3, Fig. 1 ) once.
the display will show the " HOLD " symbol.
Press the " button " ( 3-4, Fig. 1 ) once, the display▼
will show following screen in sequence.
5
screen 1
CAL flashing
screen 2
7.00
CAL
4)Place the electrode into pH 7.00 buffer solution ( PH-07A )
Press the " Hold button " ( 3-3, Fig. 1 ) once.
The " 7.00 " will flashing, following show " End ".
then return the normal measurement screen and
finish the pH 7.00 calibration procedures.
screen 3
7.00 flashing
CAL
screen 4
End
screen 5
7.00
return to normal screen
6
pH 4 calibration
1)Rinse the electrode in distilled water.
2)Power on the instrument by pressing the " Power button "
( 3-2, Fig. 1 ).
3)Press the " Hold button " ( 3-3, Fig. 1 ) once.
the display will show the " HOLD " symbol.
Press the " button " ( 3-4, Fig. 1 ) once, the display▼
will show following screen in sequence.
screen 1
CAL flashing
screen 2
7.00
CAL
4)Press the " button " ( 3-4, Fig. 1 ) once, the display▼
will show :
screen 3
4.00
CAL
7
5)Place the electrode into pH 4.00 buffer solution ( PH-04A )
Press the " Hold button " ( 3-3, Fig. 1 ) once.
The " 4.00 " will flashing, following show " End ".
then return the normal measurement screen and
finish the pH 4.00 calibration procedures.
screen 4
4.00 flashing
CAL
screen 5
End
screen 6
4.00
return to normal screen
Calibration clear
During execute the calibration procedures, if
happen some thing wrong ( Display show Error
information ), then execute the following "
Calibration clear " procedures will clear all the
existing calibration data and return to the Default
value.
8
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