Remove the Packing List and verify that you have received allequipment. If you have questions about the shipment, please callthe OMEGA Customer Service Department at l-800-622-2378 or(203) 359-1660.
Upon receipt of shipment, inspect the container and equipment forany signs of damage. Note any evidence of rough handling intransit. Immediately report any damage to the shipping agent.
The carrier will not honor shipping material is saved examining and removing contents, save packingmaterial 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-digitLED 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-upparameters and performing calibration. (Refer to Figure l-l).
SElITEMPCAl/ENIER
4A
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
Hilo
1.5 General Information
We recommend that you bench-test all equipment prior toinstallation. This requires wiring the equipment and checking relayand 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 calibrationcomplete
High alarm relay activatedLow
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 meterdimensions.
&
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 fromthe
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 temperaturereading 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 canbe wired to Terminals 1 and 2. The temperature display will showapproximately 0°C. For a complete temperature versus resistancetable, consult the OMEGA Temperature Measurement Handbook
Encyclopediam.
and
probe to Terminals 1
pH
electrode or (in
pH
ond
The PHCN-410Compensotion;
displayed.
2.2.3
Making Output Connections
For Hi and Lo
Connect the proper load to the NO and COM terminols or the NCand
COM
Setpoint Relays:
terminals.
features
however, the temperature
Automatic
When the load is connected to the NO and COM, the relay isopen until the
setpoint is reached. When the load is connectedto 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 electrodeperiodically. 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 thelight goes off, the slope is calibrated.
the
stondord
in
Hi/Lo
4.1.1
4.1.2
To
Enter theHi
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
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