16
5.3
Inputs
5.3.1 Conductivity
The controller has been configured by Evapco for an electrodeless conductivity sensor. The sensor input is
defined as ECond (S11) in the controller programming. Changing this designation may affect its operation in
the field.
Field Configurable Settings
Item
Factory Default Setting
LoLo Alarm
0
Low Alarm
0
High Alarm
15000
HiHi Alarm
15000
From the Home Screen, press ECond (S11) menu item. Select the tool icon, located on the lower right side of
display. Select the item you wish to configure. Using the keypad on the screen display enter the alarm value.
When configuration is complete select the Confirm icon to save.
Do not
attempt to modify other settings associated with this sensor input without prior approval from Evapco
Water Systems.
See
Figures 4 and 5
for wiring connections.
Electrodeless Sensor Calibration
Open Air (Zero) Calibration
This menu is used to calibrate the sensor to read zero when it is dry. Air calibration should be conducted during
system commissioning or when installing a new sensor. The sensor must be dry and in air when performing
this procedure.
From the Home screen, touch ECond (S11), select the Calibrate icon, and select Open Air Calibration from the
calibration menu. Select the Confirm icon to disable control. The controller will automatically determine the
correct Air offset wait until “Calibration Successful” is displayed on the touch screen before proceeding. Select
the Confirm icon to save calibration results. Touch the Confirm icon to return the sensor to the process. Place
the probe in the probe tee and initiate water flow. Continue with One-point Process Calibration
One-point Process Calibration
Use a calibrated conductivity meter to determine the actual conductivity of the cooling water. Select the
Calibrate icon from the ECond (S11) menu. Touch One-point Process Calibration from the menu. Enter the
actual cooling water conductivity value and touch the Confirm icon.
5.3.2 Temperature
Temperature is measured by a thermistor within the electrodeless conductivity sensor. The temperature
sensor has been designated as (S12). Changing this designation or any input settings associated with this
sensor may affect its operation in the field.
Do not
attempt to modify settings associated with this sensor input
without prior approval from Evapco Water Systems.
The Temperature sensor has been calibrated prior to shipment. Should it be necessary to calibrate temperature,
use a calibrated thermometer to measure the fluid temperature and adjust the controller to match. From the
Home screen, select Temperature (S12). Select the Calibrate icon then One Point Process Calibration. Enter the
fluid temperature measured from the thermometer and touch the Confirm icon wait until “Calibration
Successful” is displayed on the touch screen. Select the Confirm icon to save calibration results.
