Omega PHCN-410 User Manual

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PHCN-4 10

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MEOMEGA”]

Operator’s Manual

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Controller Operator ’s Manual

pH

SECTION
Section 1 Getting Started

the

&packing

.I1

1.2

Controller Description

1.3

Keypad Description

1.4

Front Panel

1.5 General Information

Controller.. .........................................................

................................................................

....................................................................

Displays

.................................................................

....................................................................

Section 2 Installing the Controller

2.1

Mounting the Controller

the

2.2 W iring

2.2.1

2.2.2

2.2.3

Controller..
Connect ac Power
Making Input Connections
Making Output

Section 3 Calibrating the

3.1

Calibrating the

pH

pH Electrode

..........................................................

...............................................................

Connections..

Electrode

.........................................................

.........................................

...................................

.....................................................

Section 4

Operating the Controller

4.1

4.2 Error Messages

Section

5

Section 5.1 Specifications

pH

Controller Operator ’s Manual

Entering PHCN-410 Hi/Lo Setpoints

4.1.1

4.1.2

To Enter the Hi
To

Enter the Lo

..........................................................................

Specifications

......................................................................

Setpoint

Value

Setpoint Value..

....................................

..................................

...............................

.4-l

4-l
4-l

4-2

5-l

..

.l

.1 .

Unpacking the Controller

Remove the Packing List and verify that you have received all
equipment. If you have questions about the shipment, please call
the OMEGA Customer Service Department at l-800-622-2378 or
[phone].

Upon receipt of shipment, inspect the container and equipment for
any signs of damage. Note any evidence of rough handling in
transit. Immediately report any damage to the shipping agent.

The carrier will not honor
shipping material is saved
examining and removing contents, save packing
material in the event reshipment is necessary.

ii

CI& claims unless all

for

their examination. After

Getting Started

1.2 Controller Description

The OMEGA” PHCN-410
pH controller with automatic temperature compensation, a 4-digit
LED display, two SPDT mechanical relays, and a fixed 4-20
output.

Figure

1-2

pH

controller is a microprocessor-based

l-l.

Front Panel Display

mA

1.3

Keypad Description

The PHCN-410 features four keys for entering all set-up
parameters and performing calibration. (Refer to Figure l-l).

SElITEMP
CAl/ENIER

4
A

reby modes (Lo and Hi)

setpoint

Select

Initiate
buffers
setpoint

Select
Select number from

calibmtion procedure using standard

7.00,4.01

values

numeticol position from right to left

or

10.01 to enter

O-9

.

1.4 Front Panel Displays

P”
CAL

Hi
lo

1.5 General Information

We recommend that you bench-test all equipment prior to
installation. This requires wiring the equipment and checking relay
and output functions as well as
also a good time to initially calibrate the
(see section 3).

Controller in
pH

calibration
and 10.01; CAL annunciator off when calibration
complete

High alarm relay activated
Low

pH

mode

mode;

display shows

alone

relay activated

pH

input (see section 2.2). This is

pH

7.OO,4.01,

electrode to the meter

Installing the Controller

2.1 Mounting the Controller

Refer to Figures 2-l and 2-2 for panel cutout and meter
dimensions.

&

Figure 2-1. Panel Cutout Dimensions

90

mm

l-4

.

‘

), . . .

Installing the Controller

2.2.2 Making Input Connections

combination electrode to the BNC connector on the

pH

1.

Connect the

bock of the unit.

2.

If using

100 ohm Pt RTD

2 (no

polarity

Automatic Temperoture Compensotion (ATC), connect the

of the

temperature

2-3).

leads

-

see Figure

The 100 ohm Pt RTD temperature probe can be separate from
the

pH

electrode, built into the body of the
selected models) built into the mounting assembly of the
electrode.

If an ATC input is not provided to the meter, the temperature
reading will default to 25°C. If the process temperature is constant,

25”C,

but not

a precision resistor can be used to simulate the

appropriate temperature value to the unit. For example, if the

O”C,

control process runs at

a resistor with a value of 100 ohms can
be wired to Terminals 1 and 2. The temperature display will show
approximately 0°C. For a complete temperature versus resistance
table, consult the OMEGA Temperature Measurement Handbook

Encyclopediam.

and

probe to Terminals 1

pH

electrode or (in

pH

ond

The PHCN-410
Compensotion;

displayed.

2.2.3

Making Output Connections

For Hi and Lo

Connect the proper load to the NO and COM terminols or the NC
and

COM

Setpoint Relays:

terminals.

features

however, the temperature

Automatic

When the load is connected to the NO and COM, the relay is
open until the

setpoint is reached. When the load is connected
to the NC and COM, the relay is closed until the
reached. The wiring configuration is application dependent.

The PHCN-410 has a fixed 4-20

mA

Installing the Controller

Temperoture

output.

2-4

Installing the Controller

Notes

Calibrating the

3.1 Calibrating the

Calibration of the electrode to the
pH measurement. It is also necessary to recalibrate the electrode
periodically. The frequency of recalibration is system dependent.

pH calibration procedure is as follows:

The

1.

Connect the combinotion
compensation

Figure

2-3).

2.

Apply power to the instrument.

3.

Remove the electrode protector from the end of the
rinse the electrode with distilled woter, and

7.00

buffer

solution. Press the CAL key.

pH

pH

Electrode

pH

probe (if using

Electrode

pH

meter is essential for accurate

electrode ond temperoture

ATC) to the meter (refer to

2-6

At this time

the “CAL”

annunciator

light will appear. When the

light goes off, the first point is calibrated. If “7-E” appears in the

pH

display, this means the

buffer 7.00 was not used or the

electrode has failed.

Calibrating the

Electrode

pH

Operating the Controller

3-2

pH

4.

Remove the

electrode with distilled

pH buffer 4.01 or 10.01. Press the CAL Key.

electrode from the

water

pH buffer 7.00. Rinse

place

ond

the electrode

At this time the “CAL” annunciator light will appear. When the
light goes off, the slope is calibrated.

the

stondord

in

Hi/Lo

4.1. 1

4.1. 2

To

Enter the Hi

Press the SET/TEMP keypad, until the Hi

1.

front ponel.

4

Use the

2.

desired value.
When the desired value is showing in the

3.

CAL/ENTER

and

keypod

To Enter the lo

panel.

the

SET/TEMP

4

ond

value.

keypod

Press the

1.

front
Use

2.

desired
When the desired value is showing in the display, press the

3.

CAL/ENTER

Setpoint

A

keys to

k

store this

Setpoint

keypod,

A

keys to change the

to store this value into memory.

Setpoints

4.1 Entering PHCN-410
Value:

change

the

v&e

into memory.

Value:

until the Lo onnunciotor is

annunciator

displayed

display,

displayed

Notes

Notes