Instruction manual

1
1.0 INTRODUCTION
The Webmaster series cooling tower controller is multi-functional, but not all of the features
mentioned are necessarily present in the controller you have received. All features can be added in
the field.
Standard features include a direct sensor measurement of the system conductivity, a flow switch to
prevent control based on a stagnant sample, a water meter (contact or paddlewheel) input, bleed,
inhibitor feed, dual biocides, a dispersant/surfactant/penetrant output, an alarm contact, and an RS-
232 output to a computer.
Optional features include pH, ORP and/or makeup conductivity measurements, up to six digital
inputs (for point level, metering pump flow feedback, or other use), up to eight 4-20 mA inputs
(for drum level, corrosion monitors, water meters, or practically any other parameter), up to four 4-
20 mA outputs (for retransmission of the conductivity, pH, ORP, temperature, or any 4-20 mA
input signals), a modem card (for remote communications) and an Ethernet card (for connection to
a LAN).
Up to 32 controllers may be networked together.
The controller can log data and events, automatically generate reports on a periodic basis at a
programmable frequency, and if equipped with a modem card, dial out in the event of an alarm
condition. The alarm notification may be via phone to a pager, fax or email.
Our revolutionary digital communications package allows you to change set points, manually
activate or deactivate pumps and valves, upgrade software, receive reports and alarms, from any
PC that has Internet access. No proprietary software needs to be installed on the PC, only a web
browser.
2.0 SPECIFICATIONS
2.1 Measurement Performance
Contacting Conductivity pH
Range 0-10,000 µS/cm Range -2 to 16 pH units
Resolution 1 µS/cm Resolution 0.01 pH units
Calibration ± 50% of raw reading; Calibration single or dual point
scalable to read in ppm
mV Temperature
Range ± 1500 mV
Range 0 to 212
o
F (-18 to 100
o
C)
Resolution 1 mV
Resolution 1
o
F (1
o
C)
Calibration single or dual point Calibration single point; degrees C or F
Electrodeless Conductivity
Range 50 to 10,000 µS/cm
Resolution 1 µS/cm
Calibration single or dual point; scalable to read in ppm