ORP and Conductivity Cooling Tower Controller Model 2430-N4 from Lakewood Instruments

Model 2430-N4 Microprocessor-Based ORP & Conductivity Cooling Tower Controller

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 upgrades characterize this new technology.

Benefits

Multiple control options in a single economical package.
Very accurate control of chemical feed and cycles of concentration.
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.
Feeds chemical AFTER blowdown.
Has expansion slots to add additional control, such as chiller loop monitor and cycles of concentration based on incoming makeup water.

Features

4-electrode conductivity includes fouling compensation and alarm.
Differential ORP sensor with diagnostics indicates fouled reference or open pt band.
Integral flow sight & flow switch lockout.
Records both makeup (MTR1) and blowdown (MTR2) water meter totals.
Configure blowdown water meter (MTR2) as second makeup meter.
Blowdown Relay options:
- Bleed x gallons for every x gallons makeup.
- Bleed x minutes for every x gallons of makeup.
- Bleed by setpoint.
- Bleed by cycles of concentration with NCON/NCKT Option.
- Bleed by multi-setpoint selected with NCON/NCKT Option.
Three user-selectable relay options (four additional with NRLY):
- Feed by setpoint, direct or reverse.
- Water meter actuated feed. MTR1, MTR2 or sum.
- Feed after blowdown by percent of bleed time.
- 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).

Specifications

Inputs
	Power	120/240 VAC 50/60 Hz
	Sensor	4 electrode Conductivity ORP 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) @ 100°F(38°C)
	Max. Temperature	140°F (60°C)
	Min. Flow	1 gpm (3.8 Lpm)
Controller
	Conductivity Range	0-5,000 µS (Other ranges optional)
	Conductivity Accuracy	± 40 µS
	Conductivity Resolution	10 µS
	ORP Range	-1000 to +1000 mV
	ORP Accuracy	± 5 mV
	ORP Resolution	1 mV
	Deadband	Adjustable
	Setpoints	Direct or Reverse (configurable in the field)
	Feed timer	Adjustable
	Keypad	Numeric
	Display	Illumin. 128x64 pixel LCD
	Ambient Temperature	32-140°F (0-60°C)
	Enclosure	NEMA-4X
	Electrical Rating	UL, CSA Listed

Ordering Information

2430-N4
LONWORKS® Technology-based ORP and conductivity controller with plumbing and flow switches. Four relays are integral to the system. One is dedicated to blowdown. The others may be configured for ORP, inhibitor feed on conductivity, water meter, percent of time or schedule feed. ORP range is -1000 to +1000 mV and conductivity range is 0-5,000 µS. Enclosure is NEMA-4X with molded female receptacles for relay outputs and has room for a modem and the NRLY option.

CONTROLLER OPTIONS (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 conductivity and ORP.

-RS2L
Communications node with shareware software. Requires -RTC Option.

ENCLOSURE OPTIONS

-WP
No outlets or power cords.

LANGUAGE OPTIONS (choose one, English and Spanish Standard)

-EF
English and French.

-EG
English and German.

REMOTE NODE OPTIONS (MUST purchase -NIN Option above)

NRLY
Four additional relays with enclosure (2 per 2000 Series Controller).

NpH
pH/ORP node for a pH or ORP sensor.

N420I
4-20 ma input node for up to 4 4-20 ma inputs.

NDIG
Digital input node for up to 4 digital inputs.

NCON
Conductivity node for makeup water or closed loop control (node only).

NCKT
Conductivity node for makeup water or closed loop control with PVC sensor, tee and enclosure. Maximum water pressure and temperature is 100 psi @ 120°F (6.9 bar @ 49°C). NOTE: NOT FOR USE WITH MULTIPLE COOLING TOWERS.

SOFTWARE AND EXTERNAL MODEMS

LRWS
Windows-based registered software for computer to communicate with 2000 Series Controllers.

MD
High-Baud modem for use with 2000 Series Controllers.