ATO PH/ORP User manual

PH/ORP
PH/ORP Meter
User Manual

Catalogue
Preface................................................................................................ 2
Notice.................................................................................................. 2
User instructions................................................................................3
Chapter I Brief introduction on product........................................ 4
Characteristics............................................................................4
Technical index...........................................................................5
Chapter II Fixed installation............................................................6
2.1 Instrument installation........................................................ 6
2.2 Electrode installation........................................................... 7
2.3 Instrument wiring................................................................ 8
Chapter III Operation of keys......................................................... 10
Chapter IV Instrument picture and operation ..............................11
Chapter V Configuration setup.......................................................13
System setup..............................................................................13
Signal setup............................................................................... 13
Online calibration ...................................................................13
Teletransmission setup ...........................................................14
Caution setup............................................................................ 15
Information inquiry................................................................. 15
Chapter VI Communication .........................................................16
Chapter VII Product maintenance................................................ 17
Chapter VIII Fault analysis and exclusion................................... 19
pH Meter
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Preface
Thanks for buying the PH tester.
The installation, function, setup, wiring method and operation
instruction is introduced in the manual. Please carefully read the manual
in advance in order to correctly use the instrument. Please properly keep
the instruction at the place where it can be read at any time after read so
as to provide reference during the operation.
Notice
The content is forbidden to copy and publish.
The change of the manual content won’t be exceptionally notified
due to the continuous improvement of the performance and function.
We do our best to ensure the accuracy and completeness of the
content. Please contact us if mistakes and omission exist.
User instructions
Please abide by the operation specification and notes of the
instruction book during the use.
The instrument only has one electrode input end, PH electrode shall
be installed when the PH mode is selected and OPR electrode shall be
installed in the ORP mode.
The warranty period of the glass electrode is 1 year in order to
ensure more accurate measurement, the performance will be affected 1
year after leaving the factory no matter it’s used or not, which shall be
timely exchanged.
The PH electrode of the first time use or it’s not used for a long time
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must be soaked in 3mol/L Potassium Chloride Solution for 24 hours
before the use.
The electric preheating time of the instrument shall be above about
half a minute before the calibration work is performed.
It shall be washed to clean in the distilled water (or deionized water)
during the measurement; the water shall be dried by filter paper so as to
prevent the sundries from being taken in to the test solution.
Please contact the manufacturer if the instrument can’t normally
work or it’s broken during the use, the self-repair is forbidden.
Chapter I Brief introduction on products
The online monitoring PH/ORP value is independently researched
and developed, which is delivered to the monitoring room with
teletransmission by RS485 or current converter so as to record and store.
PH/ORP tester is one of the intelligent on-line chemical analyzers,
which is broadly used in the continuous monitoring on PH value or OPR
value and temperature of thermal power, chemical engineering and
fertilizer, metallurgy, environment protection, pharmacy, biochemistry,
food and tap water as well as other solution.
The teletransmission monitoring and recording of continuous
monitoring data is realized through the converter output connection
recorder, and the monitoring and recording is realized by easily linking to
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the computer with MODBUS-RTU protocol through connecting RS485
interface.
The low voltage DC24V is added according to the water industry
environment and characteristics combined with international power
supply standard.
Characteristics
Board of modular design makes the assembly and configuration
more convenient.
2.4 inch 12864 lattice screen is adopted.
Isolated transmitting output is adopted so as to make the
interference degree smaller.
Isolated RS485 communication is adopted.
The measurement, temperature measurement, top and bottom
limitation control, transmitting output and RS485
communication of PH/ORP is performed.
Function of configurable manual or automatic temperature
compensation.
High and low warning function as well as retardation can be set.
The buzzer and LCD backlight switch function can be set.
The function of all-powerful password is added.
The watchdog of industrial control can guarantee that the
instrument won’t crash.
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Technical index
Isolated transmitting 4-20mA output can be set, the maximum loop is
750Ω, 0.1%FS
Measurement range: PH（0-14 pH）;ORP(-1000-+1000 mV or
(-2000-+2000 mV))
Precision: ±0.02 pH; ±1mV
Resolution ratio: ±0.01 pH; ±1mV
Stability: ≤0.02 pH/24H; ≤3 mV/24H
Input impedance: ≥10^12
Temperature measurement scope: 0-100℃, precision: ±0.5℃, NTC
10K
Temperature compensation: 0-100℃manual/automatic
RS485function, compatible with standard MODBUS-RTU
communication protocol
Power supply: AC220V±10%, 50Hz or DC 24V
Alarm relay: AC250V, 3A
Chapter II Fixed installation
2.1 Instrument installation
The installation site and method of the instrument are explained, the
part shall be carefully read during the installation.
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Notes for installation
The instrument is panel mounted.
It shall be installed inside the building so as to avoid wind and rain
as well as direct sunlight.
Please install it at the place with good ventilation in order to prevent
the internal temperature of the instrument from rising.
Don’t lean to left or right when the instrument is installed, horizontal
installation shall be realized as possible (retroversion<30°).
The following places shall be avoided during the installation
The place that’s exposed to direct sunlight and the vicinity of the
hot tools.
The place where the environment temperature exceeds 60℃
during the work.
The place where the environment humidity exceeds 85% during
the work.
The vicinity of the electromagnetic occurring sources.
The sites with strong mechanical vibration.
The site where the temperature is changed a lot and the moisture
condensation is easily formed.
Places with lots of lampblack, steam, moisture, dust and
corrosive gas.
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——————————————————————————————————————————
7
Installation method
A 91*91 installation hole is opened at the instrument cabinet or
installation panel
The instrument is inserted into the installation hole and the screw is
fixed, refer to the following drawing
2.2 Electrode installation
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①Side wall installation ②Flange mounted at the top ③Pipe installation ④Top installation
⑤Submersible installation ⑥Flow-through installation
The interface must be in 15°oblique angle, or it will affect the normal test and use of the electrode. We won’t be re
sponsible for any results due to this.
Sketch map of the common installation method
2.3 Instrument wiring
Wiring diagram
Definition of the port
INPUT: measuring terminal of the electrode
REF: reference terminal of the electrode
NC: undefined
TEMP2: temperature compensation terminal 2
TEMP1: temperature compensation terminal 1
RS485(A+):RS485 communication interface A+
RS485(B-):RS485 communication interface B-
4-20mA(+):4-20mA output end+
4-20mA(-):4-20mA output end -
AC220V(L) or (DC24V-): AC220V live wire or
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（DC24Vnegative especially special model）
AC220V(N) or （DC24V+）
:AC220V live wire or
（DC24V
positive especially special model）
LO(AL): low alarm
HI(AH): high alarm
Notice
Please confirm that the instrument is not electrified before
connecting the signal line in order to avoid electric shock.
Please use double insulation line in order to avoid fire
disaster.
Please don’t take electric products near to the signal
terminal, which may cause the fault.
Chapter III Operation of keys
Key distribution
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