Microprocessor Based pH Controllers
from Lakewood Instruments

Model 2350P Microprocessor-Based pH Controllers

LONWORKS^* Technology is the latest in microprocessor capability that gives the user the highest level of application flexibility. A large illuminated graphics screen, multiple inputs and very easy setup with easy field upgrade characterize this new technology. The unit does not include plumbing or a sensor. For use with process-type pH sensors (order separately).

• Differential pH sensor input with diagnostics indicate fouled reference or broken glass.
• Input for flowswitch lockout.
• Two water meter inputs, MTR1 and MTR2.
• 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;
  • Feed by schedule (-RTC Option);
  • General alarm contact.
    
• Three security levels:
  
  • View only
  • Operator
  • Technician
    
• Four different languages.
  
  • English Spanish (standard)
  • English French (optional)
  • English German (optional)

Inputs
Power		80-300 VAC
Sensor		pH glass electrode w/BNC
Temperature comp.		None, 500 NTC, 4K NTC, 10K NTC, 100 PTC, 1K PTC, 3K PTC and 10K PTC
Flow / level switch		Dry contact
Water Meter Input		Two contacting head or open collector
Outputs
Relays		3 Amps @ 120 VAC
4-20 mA		Two, isolated w/-35L
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		32-158°F (0-70°C)
Enclosure		ABS Plastic
		NEMA 4X Optional