Omega PHCN-962 User manual

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Preface
This manual serves to explain the use of PHCN-962 series controller / transmitter. This instruction
manual is written to cover as many anticipated applications of PHCN-962 series controller / transmitter.
The information presented in this manual is subject to change without notice as improvements are
made, and does not represent a commitment of part of OMEGA ENGINEERING.
OMEGA ENGINEERING.can not accept any responsibility for damage or malfunction of the unit
due to improper use of the instrument..
Copyright©2007 OMEGA ENGINEERING，All right reserved。

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SAFETY INFORMATION
OMEGA ENGINEERING.Controller / Transmitter shall be installed and operated
only in the manner specified in the Instruction manual. Only skilled, trained or
authorized person should carry out installation, setup and operation of the instrument.
Before powering up the unit, make sure that power source is connected to, is as
specified in the top label. Failure to do so may result in a permanent damage to the unit.
Proteet level against electric shock mainly depends on relevan installation rules.

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TABLE OF CONTENTS
1 PREFACE 7
BEFORE USE 7
IN USE 7
SAFETY INSTRUCTION 8
2 PRODUCT DESCRIPTION 9
2.1 DESCRIPTION OF INSTRUMENT SPECIALITY: 9
2.2 MEASUREMENT AND CONTROL SYSTEM 10
2.3 APPEARANCE 11
2.3.1 INTRODUCTION OF DISPLAY 12
2.3.2 KEY INSTRUCTION 13
2.3.3 LED INDUCTION 13
2.3.4 PASSWORD 13
2.3.5 PREVIEW OF FUNCTION 14
3 INSTALLATION AND ACCESSORY 15
INSTALLATION 15
PHCN-962 CONNECTION DIAGRAM 16
MEASUREMENT MODE 17
4 CALIBRATION MODE 18
4.1 ENTERING CALIBRATION MODE 18
4.2 pH CALIBRATION 19
4.3 ORP–mV CALIBRATION 22
5 SET UP MODE 23
ENTERING SET UP MODE 23
5.1 P01：TEMPERATURE SET-UP SUB-FUNCTION 24
5.2 P02：OFFSET SET-UP SUB-FUNCTION 25
5.3 P03: OUTPUT ELECTRIC CIRCUIT（SP1/SP2）SUB-FUNCTION 26
5.4 P04：CONTROL MODE SUB-FUNCTION 27
5.5 P05：RELAY 1 SET-UP SUB-FUNCTION 28
5.6 P06：RELAY 2 SET-UP SUB-FUNCTION 29
5.7 P07：ALARM RELAY 3 SET-UP SUB-FUNCTION 30
5.8 P08：pH/ORP AND SENSOR CONFIGURATION SUB-FUNCTION 31

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5.9 P09：TRANSMITTING RATE SUB FUNCTION 32
5.10 P10：REVERTING TO FACTORY DEFAULT SETTINGS 33
5.11 COMMUNICATION PROTOCOL 34
6 TECHNICAL PARAMETERS 38
6.1 TECHNICAL PARAMETERS FORM 38
6.2 PARAMETER SETTING AND FACTORY PRELIMINARY VALUE 39
APPENCLIX 2 – pH TEMPERATURE CORRESPONDING TO pH BUFFER SOLUTION 40
APPENCLIX 3 – HYSTERESIS BAND 41
APPENCLIX 4 – CONTROL MOVEMENT 42
ACCESSORY 5 – ABBREVIATIONS IN FUNCTION FORM 44

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1 PREFACE
BEFORE USE
Thank you for using OMEGA ENGINEERING. PHCN-962 series controllers and transmitters.
Although this series of pH/OPR controllers / transmitters use advanced technology and meet the
requirements of current safety rules, improper use can also threaten the safety of users, and / or cause harmful
influences to factory and other equipments. Therefore, before using pH/ORP controllers / transmitters, relevant
person must read and understand contents of this instruction manual.
Following symbols used in this instruction manual are to mark safety instruction and
appendix information：
This symbol means contents and safety instructions and warming of potential
dangerous. If they are neglected, person may be hunted and property may be
damaged.
This symbol means the contents are appendix information. If they are neglected, it
will cause low efficient and even losing products.
Instruction manual should be kept accessible within the person who use pH/ORP controllers /
transmitters.
If you have problems, which are not mentioned or cannot be explained in this manual, please contact
with your suppliers. They will be very glad to help you.
IN USE
OMEGA ENGINEERING. pH/ORP controllers / transmitters, as described instruction manual, are
intended to separate pH or ORP and temperature measurement.
Any other uses, or other unmentioned use in instruction manual, are not acceptable when they contradict
the technical parameters
Other conditions of right use include:
– Notice remarks and requirements stated in instruction manual.
– Notice local safety regulations about safe operation.
– Notice information and warning of products that are used together with the
transmitters in the contract. (Chassis, electrode, etc.)
– Notice required using environment and working condition.

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SAFETY INSTRUCTION
pH / ORP transmitters should be installed and operated by qualified person who
are familiar with the work.
Transmitters with problems should not be installed and used.
pH / ORP transmitters should be used under the required working condition.
pH / ORP transmitters should be open and repaired by clients them selves.
Mollified pH / ORP transmitters should not be used. Producers and suppliers do
not bear responsibility for the damage and lose caused by modifying instruments
without permission. Clients should bear all the risks.
This instrument has a protection level of IP65. Please use waterproof cable glands
when you connect the line. Also, please loose it when you open the cover. After
connecting the line, please tighten the cable conductor according to the above
table 3 with attached tie line, or it will cause danger because cable conductor or
interface falls off when open the cover.
Please make sure to cut the power when you open the cover to carry
through any operation.

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2 PRODUCT DESCRIPTION
2.1 DESCRIPTION OF INSTRUMENT SPECIALITY:
OMEGA ENGINEERING.pH / ORP transmitters are used to measure pH or ORP and
temperature value. pH or ORP measured value can use PLC or LIT to control precisely adding
medicine.
This kind of transmitters has two versions: one is installing way and the other is wall hanging installing
way. Transmitters can be used as monitor in water treatment, in electrolytic water cleaning, in process of
chemical industry, in food process, in cleaning water or wastewater treatment and in neutralization process.
This transmitter has many user-friendly and safety features which include:
• Menu-driven programs that easy to set-up.
• Strong interference protected design can be used in strong.
• IP65 all-day water and air proofing can be used in any adverse circumstances.
• Built-in memory backup to ensure that setup parameter and calibration information are not erased if
power off or power off in abnormal condition.
• Can separately set process temperature (TST1) and Calibration temperature (TST2) by manual
operation. Without doing trivial manual temperature setting. If the temperature sensor fails. Under
automatic temperature compensation mode, instrument will automatically switch to process
temperature (TST1) of manual temperature compensation to compensate. This can ensure that the
instrument can be working normally. Please refer to procedures of Item 5.1.
• pH measured value can make offset adjustment (adjusting scope ±2PH) so that users can calibrate
online. Please refer to procedures of Item5.2.
• Various choice of electric current output. 0/4-20mA Output scope can be set. (Over / pH). Please
refer to procedures of Item5.3.
• Two routes of relay contacts, users can choose high-low meta control independently and freely.
• Separately adjustable high and low set point hysteresis (dead bands) prevent oscillating of relays
around the set points.
• Various adding-medicine control mode, users can choose precise adding-medicine (PLC) and LIT.
Two groups of relays can switch high-low point control freely. Please refer to procedures of Item 5.4.
• Two kinds of electrode input, users can choose balanced input and imbalanced input. Users can
choose balanced input mode under the strong interference industrial situation. Please refer to
procedures of Page 17.
• Large dual display LCD for easy reading with clear multiple annunciators, alarm status and
operational message annunciators. Long-life micro-switch key can set easily.
• Can set time of instrument and electrode to reduce person management. Instrument will
automatically appear “CAL” at regular time to call person to make calibration and maintain once.
Please refer to procedures of Item 5.7.
• Automatically clean relay design. Users can set cleaning time and install cleaning equipment by
themselves. Please refer to procedures of Item 5.7.

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• Glass electrode and Metal antimony electrode can be chosen and be used under different industrial
situation and HF measurement situation. Please refer to procedures of Item 5.8.
• During calibrating and setting, hold function freezes output current (0/4 20ma) and releases control
relays.
• LED indicators signal control activities to monitor controller status from a distance.
• Ultraviolet rays proofing, LCE of blue back light (LCD=liquid crystal display)
• RS-485 output can set tandem transmitting rate and ID NO. by itself. Maximum 100 instruments can
be connected with computer to provide convenience management for terminating machine.
2.2 MEASUREMENT AND CONTROL SYSTEM
Typical measurement system includes:
• pH/ORP on-line transmitter
• United or separated temperature sensing instrument Pt1000 of pH/ORP compound electrode.
• Suitable pH/ORP measurement electric cable.
• Immersion, flow or processing parts with or without grounding electrode.
• Terminating controlling parts, eg. Pump or value.
• 0/4~20mA can connect with recording instrument.
• RS485 can be used as multi-instrument communication.
• RL3 relay can be used as many controller and warning.
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PHCN-962