Eutech Instruments ALPHA PH 100 User Manual

Alpha pH 100 C/CX

pH/ORP

Controller / Transmitter

INSTRUCTION MANUAL

MODE

H/OR

7.0

SETU

Technology Made Easy ...

READY

ENTER

RELAY

Preface

This manual serves to explain the use of the Alpha pH 100 pH/ORP Controller/Transmitter. The units covered are Alpha C and CX pH/ORP Controller/ Transmitter.

The instruction manual functions in two ways: first, as a step by step guide to help you operate and understand the operation of the unit and second, as a handy reference guide.

The information presented in this manual is subject to change as improvements are made, and does not represent a commitment of Eutech Instruments Pte Ltd.

This instruction manual is written to cover as many anticipated applications of the Alpha pH 100 C/CX pH/ORP Controller/Transmitter as possible. If there are doubts in the use, please do not hesitate to contact the nearest Eutech Instruments’ Authorized Distributor or us at (65) 778-6876.

Eutech Instruments cannot accept any responsibility for damage or malfunction of the unit due to improper use of instrument.

TABLE OF CONTENTS

1. Introduction------------------------------------------------------------ 3

2. Getting Acquainted--------------------------------------------------4

2.1 Front Panel.............................................................4

2.2 Back Panel............................................................. 5

2.3 Selecting pH/ORP Measurement Mode..................6

2.4 Wiring.....................................................................6

3. Operating the Controller -------------------------------------------7

3.1 The Main Display.................................................... 7

4. Setting Up the Controller ------------------------------------------ 8

4.1 Setting and Changing the Password....................... 8

4.1.1 Setting New Password.........................................................8

4.1.2 Changing the Password.......................................................9

5. Calibrating the Controller---------------------------------------- 10

5.1 The Lower Level Menus........................................10

5.2 Calibrating for pH Measurement........................... 10

5.2.1 The CAL PH menu.............................................................10

5.3 Changing the Offset..............................................11

5.4 Calibrating for ORP Measurement........................12

5.5 Calibrating for Temperature Measurement ...........12

5.5.1 The CAL °C Menu..............................................................12

5.5.2 ATC ON/OFF.....................................................................13

5.6 Setting the Alarm Feature ...................................15

5.6.1 The Hi SET Menu ..............................................................15

5.6.2 The Hi HYS Menu..............................................................16

5.6.3 The Lo SEt Menu...............................................................17

5.6.4 The Lo HYS Menu .............................................................18

6. Using the Controller Current Loop for Datal oggi ng (for Transmitter Model Only)------------------------------------------------- 19

7. Additional Information-------------------------------------------- 20

8. Appendix 1 - Jumper Positions (I nside Controller) ------- 21

9. Appendix 2A - Jumper Positions (pH) ----------------------- 23

10. Appendix 2B - Jumper Positions, ORP --------------------- 24

11. Appendix 3 - pH Offset / Slope-------------------------------- 25

12. Technical Specifi cations ---------------------------------------- 26

1. Introduction

The alpha pH 100 series pH/ORP Controller/ Transmitter is the latest innovation of process controllers from Eutech Instruments. Incorporated with the ASIC (Applic ation Specific Integrated Circuit) m i croprocessor technology, thi s panelmounted on-line controller provi des many user-friendly features desirable in pH/ORP controll ers.

This versatile pH/ORP unit can be used either for measuring and monitoring pH or ORP values at one time. It cannot be used for measuring both parameters simultaneous l y. When shipped, it will be set internally to the pH mode by means of an internal jumper. This jumper can be reset by you to select between the pH and ORP mode.

Some of the features of this Controller are :

• Automatic temperature compensation (with PT 100)

• Manual temperature compensati on setting without the

temperature probe

• Push button calibration up to 3 points

• Offset adjustment

• High and low alarm triggering relays

• User-defined password feature to prevent unauthorized

entry to change the calibration data, hysteresis function, high and low setpoints information

• Alarm and operational message annunciators

• Hysteresis function t o prevent chattering of relays around

the setpoint

• High-end transmitter model with 4-20 mA current output

for datalogging purposes (pH CTP0100 only)

• Built-in memory backup to ensure that calibration and

other information will not be erased if power supply fails

• Switchable mains voltages of 110 VAC or 220 VAC via

user selectable internal j umper

2. Getting Acquainted

SETU

2.1 Front Panel

The front panel consists of a 3 digit LED display together with 5 LED annunciators. There are also 4 k eys as shown below.

MODE

8 8 8

pH/ OR

The keys available are the ▲ (UP/INCREMENT), ▼ (DOWN/DECREMENT), MODE and ENTER keys.

The annunciators are pH/ORP, °C, SETUP, READY, and RELAY. The function of the annunciator is to provide additional information, for exampl e, the pH/ORP annunciator lights up i n pH/ORP measurement mode. The READY annunciator lights up when the pH/ORP stabilizes. RELAY lights up when any of the HI SET or LO SET relays i s activated.

The MODE key allows you to select between pH or ORP display, the temperature display or the SETUP menu di splay. While in one of the SETUP menus, it als o functions as an ESCAPE key. For example, while setting the Hi SET point, you can press MODE key if you change your mind about changing this information.

You can confirm changes or to enter into further levels of the lower menu by pressing the ENTER key. The ▲ (UP/INCREMENT) and ▼ (DOWN/DECREMENT) keys allow you to change information or t o select between different menus . Holding down the key increases the scrolling speed, i.e. changeover of 1st digit (ones) t o 2nd (tens) and then 3rd digit (hundreds).

REA D

RELA

2.2 Back Panel

The back panel consists of t wo connectors . The f irs t one is a 4way screw terminal and the second is a 12-way screw term inal. Refer to the label on top of the unit for diagram. The connection for the 4-way screw termi nals are (from the left to right):

1. PT 100 connection

2. PT 100 connection

3. No connection

4. No connection The connections for the 12-way screw term inals are (from left

to right),

5. Low Set Relay deactivated posit i o n

6. Low Set Relay center pole

7. Low Set Relay activated position

8. High Set Relay deactivat ed position

9. High Set Relay center pole

10. High Set Relay activat ed position

11. 4-20 mA - ve connection (for transmitter m odel s only)

12. 4-20 mA + ve connection (for transmitter m odel s only)

13. Protective earth

14. Protective earth

15. Neutral

16. Live

2.3 Selecting pH/ORP Measurement Mode

You can set the appropriate pH/ORP measurement mode from the jumper. See Appendix 1 for details on the jumper positions for pH mode and Appendix 2 for jumper positions for ORP

mode.

2.4 Wiring

Connect the power supply to the GND (EARTH) - 13 or 14, NEUTRAL - 15 and LIVE - 16 screw terminals. Make sure that the power supply jumper setting matches the mains voltage (110 VAC or 220 VAC). See Appendix 2 for the jumper setting for the voltage selecti on.

Connect the pH electrode to the B NC connector at the back panel. Wire up the P T 100 t emperature probe to the PT 100 connections (see back panel connections).

Power on the controller and the display automatically shows the pH/ORP reading. The pH/ORP annunciat or l i ghts up. Once the reading is stable, the READY annunciator lights up. However, if the PT 100 temperature probe is not connected, automati c temperature compens ation does not function. You c an set the temperature at a select ed val ue. The temperature is set t o factory default at 25.0

NOTE : Eutech Instrum ent s will not be responsible for

incorrect application of the controller using improper voltage sources or wrong jumper set t ings.

3. Operating the Controller

3.1 The Main Display

Press MODE key to switch to three main displays - the pH/ORP display, the temperat ure display

7.4

pH/ORP

MODE

ENTE

and “SEt” display. Press MODE key once to get into

the temperature meas urement. The °C annunciator lights up when you are measuring temperature.

24.0

MODE

ENTE

The display shows current measured temperature (with A T C) or the temperature that was set i n MTC mode. Press MODE key again and the display toggles to

SEt

MODE

ENTE

SETUP

the “SEt” for SETUP menu.

Press ENTER key to go into the lower-level setup menus while the display shows "SEt". These lower-level menus allow calibration of pH/ORP, Temperature and other parameters including set password, Hi or Lo S et poi nts, and Hi or Lo Hysteresis values.

4. Setting Up the Controller

4.1 Setting and Changing the Password

4.1.1 Setting New Password

To set a password, press MODE key

MODE

CAL

SETUP

SEt

SETUP

123

SETUP

menu, press ENTER and set your desired password by following the above steps.

until the “SEt” is displayed.

ENTE

1. Press ENTER key and the display shows "CAL” and “PH” alternately. Press ▲ key once and the display shows “SEt”

MODE

ENTE

“id”.

2. Press ENTER to enter your desired password. Follow the steps below (e.g. using a

password “123”).

MODE

1. Initially, the display shows "000"

ENTE

with the first digit blinking.

2. Use ▲ (UP/INCREMENT) key

to enter “1” on the 1st digit of the password. Press ENTER

MODE

ENTE

once and the second digit will blink. Similarly, enter the second digit of the pass word “2” and press ENTER key again. Repeat with the third digit accordingly.

3. Press ENTER key and the

MODE

ENTE

display shows “CAL” and ”PH” alternately. Use ▲ or ▼ key to get into the “SEt” and “id”

1. Once completed, press ENTER to confirm and then press MODE key to return to the pH display.

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