Tequipment PH-222 Operating Manual

Pen type, with electrode, ATC

PH METER

Model : PH-222

Your purchase of this 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.

OPERATION MANUAL

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.......................................... 8

5-1 pH measurement.................................................8

5-2 Data hold............................................................8

5-3 Data record ( Max., Min. reading )........................9

5-4 Change Temp. unit , ....................................

.

℃℉ 10

6.DATA LOGGER..........................................................

.

10

6-1 Save data........................................................... 10

6-2 Call data.............................................................11

6-3 Delete data ( Empty the memory ).......................

.

12

7. REPLACEMENT OF BATTERY......................................13

8. REPLACEMENT OF pH ELECTRODE............................

.

13

9. OPTIONAL ACCESSORIES..........................................14

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.

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 Meter : 0 to 60 ( 32 to 140 )℃℃℉ ℉
Accessories

* refer page 8, page 9.

3