Omega Products ORCN-901 User Manual

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Wall-Mounted, Single Setpoint and Proportional pH Control

The PHCN-901 is a pH
controller with a single setpoint
for proportional dosage of acid
or alkaline solutions. Any pH
electrode with a BNC
connector can be directly
attached to the PHCN-900
series or ORCN-901. The
proportional control can be fine
tuned through two dials on the
front panel. The time cycle is
adjustable from 0 to 90 seconds
and the proportional band from

0.0 to 2.0 pH. Coarse and fine as
well as two offset and slope trimmers
make accurate setting and
calibration easy and convenient.
A pump or electro-valve can be
wired directly to the controller and
be powered through the terminals.

The PHCN-901 also provides for
an alarm relay. The alarm is
activated when the
measurements stray away from
the setpoint by a predetermined
value in the 0 to 2 pH range.
A max dosing time from
1 to 10 minutes is required to be set,
after which the alarm is activated to warn of an abnormality. The
alarm can be configured in either normally-closed or normally-open
state. The PHCN-900 series also provides an isolated output
signal, which is user selectable between 0 to 20 or 4 to 20 mA. A
dial on the front panel renders manual temperature compensation
fast and easy. For automatic compensation, hook up a 3 wire
Pt 100 RTD to the controller. To speed up wiring, PHCN-900 and
ORCN-901 series comes with extractable terminal modules. Once
wired up, the compartment containing the connections is protected
behind a fire-retardant ABS panel. Several LEDs show whether the
setpoint or alarm relays are activated from a distance.

The PHCN-902 is a pH controller with two setpoints for proportional
dosage of acidic and alkaline solutions. Through two sets of coarse
and fine trimmers, the setpoints can be accurately fine tuned to any
value in the 0.00 to 14.00 range. Likewise, two trimmers on the
front panel make for easy calibration. The proportional control can
be adjusted to match your application through the time cycle from
0 to 90 seconds and the proportional band of 0 to 2 pH. Two pumps
or valves can be wired directly to the controller and be powered
through the terminals. The PHCN-902 provides for two types of
alarms. The alarm relay is activated when the measurements are
beyond the setpoints by more than a predetermined value in the
0 to 2 pH range. Alternatively, the relay can activate, when one of
the two independently-adjustable maximum dosing times is
exceeded. The alarm can be configured in either normally-closed
or normally-open state and turned off during maintenance.

The ORCN-901 is an ORP controller with a single setpoint for user­selectable dosage of reducing or oxidizing solutions. With
proportional control, you can fine tune your treatment plant and
minimize the use of chemicals. The proportional setting can be
adjusted through the time cycle from 0 to 90 seconds and the band
from 0 to 200 mV. The setpoint can be accurately adjusted through
coarse and fine trimmers. A pump or electro-valve can be wired
directly to the controller and be powered through the terminal. In
addition to the setpoint relay, the ORCN-901 also provides for an
alarm relay. The alarm is activated when the measurements exceed
the operator-adjustable threshold of 0 to 200 mV. For extra security,
a maximum dosing time from 1 to 10 minutes is required to be set,
after which the alarm is activated to signal an abnormality. The
alarm configuration is alterable in a normally-closed or a normally­open state to accommodate fail-safe installations. Any recorder
accepting a 0 to 20 or 4 to 20 mA output can also be hooked up to
the controller. One can judge the controller’s status, even from a
distance, by observing the dosage or alarm LEDs.

PHCN-901

Starts at

$

505

⻬ Wall Mount
⻬ Isolated Recorder Output
⻬ Simple Operation
⻬ 10 Minute Maximum Dosing Time

PHCN-902, $550 shown smaller
than actual size.

PHE-1411 laboratory pH electrode, $70,
sold separately, see pH page C-13 and C-14.

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Specifications

Range: 0.00 to 14.00 pH;

ORCN-901: -500 to +1500 mV

Resolution: 0.01 pH; ORCN-901: 1 mV
Accuracy @20°C/68°F: ±0.02 pH

ORCN-901: ±5 mV
Typical EMC Deviation: ±0.1 pH;

ORCN-901: ±6 mV
Calibration: PHCN-901, ORCN-901:

One point, through trimmers on the front
panel; PHCN-902: Two point

Temperature Compensation:

Manual or Automatic with Pt100 RTD
from -10 to 80°C (14 to 176°F)

Setpoint: PHCN-901: one, selectable
from 0.00 to 14.00 pH;
PHCN-902: Two, selectable

Recorder Output: Selectable from
0 to 20 mA or 4 to 20 mA, isolated

Proportional Control:

Adjustable: pH from 0.0 to 2.0 and time
cycle from 0 to 90 seconds;
ORCN-901: Adjustable: mV from 0 to 200
and time cycle from 0 to 90 seconds

Dosing Contact: PHCN-901: One
powered terminal for pH correction (115 or
240V) (Max 2 A 1,000,000 strokes);
activated proportionally when
pH > setpoint for acid dosage or
pH < setpoint for alkaline dosage

PHCN-902: Two powered terminals for
acid and alkaline correction
(115 or 240V) (Max 2 A
1,000,000 strokes); Proportional acid
Dosage: activated when pH > setpoint,
Proportional Alkaline dosage: activated
when pH < setpoint

ORCN-901: One powered terminal
for mV correction (115 or 240V)
(Max 2A 1,000,000 strokes);
activated proportionally
mV > setpoint for acid dosage or
mV < setpoint for alkaline dosage

Alarm Relay: One, activated when pH
varies (selectable 0 to 2.0) (ORCN-901
selectable 0 to 200 mV) from the
setpoint and/or max dosage time
(1 to 10 minutes) elapses. Isolated,
(max 2 A, max 240V, resistive load,
1,000,000 strokes)

Power Supply:

110/115V or 220/240V; 50/60 Hz
Environment: -10 to 50°C (14 to

122°F); 95% non-condensing
Enclosure: 181 L x 221 W x 142 H mm

(7.1 x 8.7 x 5.6")
Weight: 1.6 kg (3.5 lb)

To Order

(Specify Model Number)

Model No. Price Description

PHCN-901 $505 Wall mount single setpoint pH controller
PHCN-902 550 Wall mount dual setpoint pH controller
ORCN-901 505 Wall mount single setpoint ORP controller
PHE-6510 134 pH industrial submersible electrode

(requires mounting assembly)

PHEH-65-10-PT100 141 Mounting assembly with temperature

compensation (required for PHE-6510)

PHA-4 5 4.00 pH buffer solution 500 mL (1 pt) bottle
PHA-7 5 7.00 pH buffer solution 500 mL (1 pt) bottle
PHA-10 5 10.00 pH buffer solution 500 mL (1 pt) bottle
ORE-6510 159 ORP industrial submersible electrode

(requires PHEH-65-10 mounting assembly)

PHEH-65-10 55 Mounting assembly for ORE-6510 (required)
FW-400 84 Reference Book: The Automation, Systems,

and Instrumentation Dictionary

Comes complete with operator’s manual.
Ordering Examples: PHCN-901, pH controller, PHE-6510, pH electrode, PHEH-65-10-PT100,

mounting assembly with temperature compensation, PHA-4, pH 4.00 buffer, PHA-7, pH 7.00
buffer, $505 + 134 + 141 + 5 + 5 = $790.

PHCN-902, dual setpoint pH controller, $550.

FRONT VIEW

181

(7.1)

164
(6.45)

110

(4.33)

204

(8.03)

221

(8.70)

pH

9.56

AVAILABLE FOR FAST DELIVERY!

BOTTOM VIEW

142

(5.60)

55

(2.16)

99

(3.90)

5

(0.19)

110

(4.33)

DIN or BNC connectors

ORCN-901, $505, shown
smaller than actual size.

Dimensions: mm (in)