Lakewood Instruments

pH Cooling Tower Controller Microprocessor-Based
Model 2350 from Lakewood Instruments

Model 2350 Microprocessor-Based pH Cooling Tower Controller

Discontinued Model

pH,Cooling,Tower,Controller,Microprocessor,Based,Model 2350,Lakewood,Instruments LONWORKS^� Technology is the latest in microprocessor capability that gives the user the highest level of application flexibility. A large graphic screen, multiple inputs and very easy setup with easy field upgrade characterize this new technology.

Features

Differential pH sensor with diagnostics indicate fouled reference or broken glass.
Integral flowsight & flowswitch lockout.
Records both makeup (MTR1) and blowdown (MTR2) water meter total gallons.
Configure blowdown water meter (MTR2) as second makeup meter.
Four user-selectable relay options (four additional with NRLY):
- Feed by setpoint, direct or reverse;
- Water meter actuated feed. MTR1, MTR2 or sum;
- Feed by percentage of time;
- Schedule feed timer (-RTC Option);
- General alarm contact.
Three security levels:
- View only
- Operator
- Technician
Four different languages.
- English Spanish (standard)
- English French (optional)
- English German (optional)

Benefits

Multiple control options in a single economical package.
Very accurate control of chemical feed.
Very low maintenance.
Tolerant to power surges and brownouts.
Power cord, plug outlets and attached plumbing make installation easy. There is plenty of protected room inside the enclosure for electrician wiring.
Very accurate monitoring of the evaporated water.
Has expansion slots to add additional control, such as chiller loop monitor.

Specifications

Inputs
Power		80-300 VAC
Sensor		pH combination glass electrode
Temperature comp.		Automatic
Flow switch		Dry contact
Water Meter Input		Two contacting head or open collector

Outputs
Relays		Four, 3 Amps @ 120 VAC
4-20 mA		Two, isolated w/-35L

Sensor/Plumbing
Pressure		140 psi (9.7 bar) @ 100ºF (38º C)
Max. Temperature		140ºF (60ºC)
Min. Flow		1 gpm (3.8 Lpm)

Controller
pH Range		0-14 pH
pH Accuracy		+/-0.05 pH
pH Resolution		0.01 pH
Deadband		Adjustable
Setpoints		Direct or Reverse (configurable in the field)
Feed timer		Adjustable
Keypad		Numeric
Display		Illuminated 128x64 pixel LCD
Ambient Temperature		32-158º F (0-70º C)
Enclosure		ABS Plastic
		NEMA 4X Optional

Ordering Information

ENCLOSURE OPTIONS (optional)
2350		LONWORKS Technology-based pH controller with 4 selectable relays for HIGH/LOW setpoints or alarms. Includes plumbing, sensor, flowswitch, power cord and outlets. pH range is 0-14 pH with adjustable deadband.
CONTROLLER OPTIONS (optional, select no more than three)
-RTC		Adds 24-hour clock and calendar to controller (required to configure relays to feed chemicals/biocides based on time of day and for data acquisition if using the -RS2L Option). NOTE: Adding an -RTC card does NOT add relays.
-35L		Two 4-20 mA outputs configurable for remote data acquisition of pH.
-RS2L		Communications node with shareware software; requires -RTC Option.
-NIN ;		Network interface node allows 1 NRLY and/or up to 3 NCON/NCKTs to be added.
-WP		Weatherproof and watertight. 1/2 inch knockouts. No outlets or power cords.
LANGUAGE OPTIONS (optional, choose one, English and Spanish Standard)
-EF		English and French.
-EG		English and German.
REMOTE NODE OPTIONS (optional; MUST purchase -NIN Option above)
NRLY		Four additional relays with enclosure (1 per 2000 Series Controller).
SOFTWARE AND EXTERNAL MODEMS
LRWS		Windows-based software for computer to communicate with 2000 Series Controllers.
MD4X		High-Baud modem in NEMA 4X enclosure ready to power.
MD		High-Baud modem for use with 2000 Series Controllers.