Pen type, separate electrode
SOIL PH METER
Model : PH-220S
Y
our purchase of this
SOIL PH METER marks a
step forward for you
into the field o
f
precision measurement.
A
lthough this METER is
a complex and delicate
instrument, its durable
structure will allow
many years of use i
f
proper operating
techniques are
developed. Please read
the following
instructions carefully
and always keep this
manual within easy
reach.
OPERATION MANUAL
TABLE OF CONTENTS
1. FEATURES................................................................1
2. SPECIFICATIONS......................................................1
3. FRONT PANEL DESCRIPTIONS...................................3
3-1 Display............................................................... 3
3-2 Power button ( button ).................................▲ 3
3-3 Hold button ...................................................... 3
3-4 Display reverse button ( button )....................▼ 3
3-5 pH electrode BNC socket..................................... 3
3-6 BNC protection cover...........................................3
3-7 Battery compartment/Cover................................ 3
3-8 pH electrode handle........................................... 3
3-9 pH electrode sensing head................................... 3
3-10 pH electrode BNC plug...................................... 3
3-11 pH electrode protection bottle............................
.
3
4. pH CALIBRATING PROCEDURE..................................
.
4
4-1 Calibrating Consideration.....................................
.
4
4-2 Requiring Equipment for Calibration......................4
4-3 Calibration procedures....................................... 4
5. MEASURING PROCEDURE..........................................5
6. REPLACEMENT OF BATTERY......................................5
7. OPTIONAL ACCESSORIES..........................................6
1. FEATURES
* Complete set with pen pH meter, soil pH electrode,
pH 4.0 /pH 7.0 standard buffer solution.
* Spear Tip pH electrode ( included ), ideal for
penetration pH measurement into soil, meats, cheese
and other type of measurements requiring sample
penetration. The electrode features a very durable
glass measuring spear packaged in a rugged virtually
unbreakable epoxy body.
* Separate soil pH electrode, easy for general purpose
usage and remote measurement.
* Auto calibration for pH 4, pH 7 or pH 10.
* Build in reverse display button.
* Data hold.
* Auto power off.
* Compact size, light weight.
* Optional carrying case.
* Water resistance on the front panel.
* Application : Agriculture, Gardening, Food
industrial, Education, School, Colleges, Laboratory,
Industrial and Quality control.
2. SPECIFICATIONS
2-1 Meter
Display LCD, size : 20 mm x 28 mm.
* User can reverse the display direction
by push button.
Measurement 0 to 14 pH x 0.01 pH
Range
Resolution 0.01 pH
1
Accuracy ± 0.07 pH(pH5 to pH 9)
± 0.1 pH(pH4 to pH4.9, pH9.1 to pH10)
± 0.2 pH(pH1 to pH3.9, pH10.1 to pH13)
* 23± 5℃
* After calibration.
Input 10^12 ohms.
Impedance
Temperature Not necessary to make adjustment.
Compensation
Sampling Approx. 0.8 second.
Time
Hold Function To freeze the display reading value.
Calibration Auto calibration,
method pH 7, pH 4 ( or pH 10 )
pH electrode BNC connector.
connector
Operating 0 to 50 ( 32 to 122 )℃℉
Temperature
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 Meter :180 x 40 x 32 mm ( 7.1 x 1.6 x 1.3 inch ).
Electrode : Body size : 12 mm dia. x 160 mm.
Electrode cable length : approx.. 1000 mm.
Weight 220 g/0.48 LB (included electrode).
2
Standard Instruction Manual......................... 1 PC.
Accessories Soil pH electrode, PE-06HD............. 1 PC.
pH 4.0 buffer solution, PH-04A.......
.
1 PC.
pH 7.0 buffer solution, PH-07A.......
.
1 PC.
Optional * Soft carrying case with sash
Accessories ( 210 x 110 x 55 mm ),
Model : CA-05A
* Hard carrying case
( 280 x 195 x 65 mm ), Model : CA-06
2-1 Soil pH Electrode ( included )
pH Measuring 1 to 13 pH ( typical 0 to 14 pH ).
Range
pH Operation 5 to 60 ( 41 to 140 ).℃℉
Temperature
pH Electrode Combination type.
Structure
Reference Ag/AgCl, Double Junction.
of pH
Electrode
Zero Potential 7± 1 pH.
for pH Value
Repeatability 0.05 pH.
Response time 2 minutes.≧
Body Material Epoxy.
Connector BNC.
Mechanical With protection bottle ( soaker
Protection bottle ) on the electrode head.
Weight 68 g ( including cable & socket ).
Dimensions Body length - 160 mm.
Body Dia. - 12 mm.
Cable length - 1000 mm.
3
3. FRONT PANEL DESCRIPTION
Fig. 1
3-1 Display
3-2 Power button ( button )▲
3-3 Hold button
3-4 Display reverse button ( button )▼
3-5 pH electrode BNC socket
3-6 BNC protection cover
3-7 Battery compartment/Cover
3-8 pH electrode handle
3-9 pH electrode sensing head
3-10 pH electrode BNC plug
3-11 pH electrode protection bottle
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 ).
4-2 Requiring Equipment for Calibration
1)Combination soil pH electrode ( PE-06HD, 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)Connect the pH electrode plug ( 3-10, Fig. 1 ) to the BNC
socket ( 3-5, Fig. 1 ) and place electrode into pH 7.00
buffer solution ( PH-07A ).
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 " ( 3-3, Fig. 1 ) once, the display▼
will show following screen in sequence.
5
screen 1
CAL flashing
screen 2
7.00
flash CAL
screen 3
7.00 flashing
CAL
screen 4
End
screen 5 ( return to normal screen )
7.00
6
pH 4 calibration
1)Rinse the electrode in distilled water.
Place electrode into buffer pH 4.00 solution.
2)All the calibration procedures are same as the
above pH calibration, except :
a. Change the buffer solution to pH 4.00 ( PH-04A ).
b. The calibration screen value will change to 7.00
instead of 4.00
Remark :
* Except calibrate pH 7, pH 4, meter also can calibrate
pH 10.
* The calibration procedures should start from the pH 7 at
first, then pH 4 ( or pH 10 ).
* During the calibration, the circuit will sensing solution
value automatically. If the buffer solution value already
beyond 7± 1 pH. 4± 1 pH, 10± 1 pH, the LCD will
show " Err ".
* When the LCD show the screen 2, it allow the user to
adjust another calibration value precisely ( for example
7.01, 6.99... ) by pressing the " button " ( 3-2, Fig.▲
1 ) , " button " ( 3-4, Fig. 1 )'▼
* Rinse the electrode in distilled water before change
the buffer solution.
* Repeat above pH, pH calibration procedures two
times at least.
* After calibration, the " Electrode sensing head "
( 3-9, Fig. 1 ) should insert into the " Protection bottle "
( 3-11, Fig. 1 ).
*
PE-06HD, PH-07A, PH-04A is the consumer accessory.
7
5. MEASURING PROCEDURE
After the meter along the pH electrode is calibrated
( section 4-3 ) , the unit is ready for measuring.
1)Connect the pH electrode plug ( 3-10, Fig. 1 ) to the BNC
socket ( 3-5, Fig. 1 ) and place electrode into the
measured solution.
2)Power on the meter by pressing the " Power button "
( 3-2, Fig. 1 ).
3)Place the electrode into the measured soil or other
type penetration material ( such as cheese, meats... )
or solution, then the instrument will display the pH
value.
* Electrode ( attached ) is the
rough and durable penetration
electrode. However user should
operate the electrode very carefully.
* The electrode is the consumer
accessory, after the electrode is
used, if the damage of the
Electrode Sensing Head ( Spear
Tip Head ), it is without warranty.
* After make the measurement, please rinse the
electrode in distilled water.
* After calibration, the " Electrode sensing head "
( 3-9, Fig. 1 ) should insert into the " Protection
bottle " ( 3-11, Fig. 1 ).
* PE-06HD, PH-07A, PH-04A is the consumer accessory.
Data hold
During the measurement, press the " Hold button " ( 3-3,
Fig. 1 ) once will hold the measured value & the LCD will
display a " HOLD " symbol.
* Press the " Hold Button " once again will release the
data hold function.
8
Display reverse
During the measurement, press the " Display reverse
button " ( 3-4, Fig. 1 ) once will reverse the display
direction for the user convenience.
* Press the " Display reverse button " once again will
return to the normal display.
Auto power off
The meter is built the " Auto power shut off " function to
save battery life. If any function buttons are not pushed
within 10 minutes, the power will be off automatically.
6. REPLACEMENT OF BATTERY
1)When the LCD display show " " ,
It is necessary to replace the battery. However, in-spec
measurement may still be made for several hours after
Low Battery Indicator appears before the instruments
instrument become inaccurate.
2)To replace the battery, rotate and remove the "
Battery Cover " ( 3-7, Fig. 1 ), take out the old
batteries, install new batteries :
DC 1.5V battery ( UM-4/AAA ) x 4 PCs.
3)When install the batteries, should make attention the
battery polarity.
4)After install the batteries, reinstall the battery cover
again.
9
7. OPTIONAL ACCESSORIES
SPEAR TIP pH ELECTRODE
Model : PE-06HD
Spear tip pH electrode is ideal for penetration pH
measurements into meats, cheese, soil and other types
of measurements requiring sample penetration.
pH 7.00 buffer solution
Model : PH-07A
pH 4.00 buffer solution
Model : PH-04A
CARRYING CASE Model : CA-06
Hard carrying case.
( 280 x195 x 65 mm ).
CARRYING CASE Model : CA-05A
Vinyl soft case.
( 260 x110 x 55 mm ).
Hard carrying case. Soft carrying case.
Model : CA-06 Model : CA-05A
280 x195 x 65 mm 260 x110 x 55 mm
10
0701-PH220S
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