Wall-Mounted, Single Setpoint and Proportional pH Control |
| PHCN-900 Series |
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Wall-Mounted, Single Setpoint and Proportional pH Control
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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.
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)
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† All dollar amounts on this site are shown in US currency.
Note: Each unit comes with complete operator’s manual.
Ordering Example: (1) PHCN-901 Wall Mount Single Setpoint pH Controller, $505.00, plus (1) PHE-6510 pH Industrial Submersible Electrode, $158.00, plus (1) PHEH-65-10-PT100 Mounting Assembly with Temperature Compensation for PHE-6510, $150.00, plus (1) PHA-4 4.00 pH Buffer Calibration Solution, 475 ml, $8.00, plus (1) PHA-7 7.00 pH Buffer Calibration Solution, 475 ml, $8.00, $505.00 + 158.00 + 150.00 + 8.00 + 8.00 = $829.00
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