Table of Contents
Advertisement
18
operation
With the system ON, press and hold the UP and DOWN arrows and then
press System On/Off. Figure 7 shows the settings that can be changed at
the controller.
WaterGard Presets Program—Change program to number of program desired.
Setpoints are shown in Standard Setpoints on page 20.
Temperature Mode—Select temperature unit desired.
Conductivity Calibration
The controller has been calibrated prior to shipment. It may be necessary to
periodically calibrate the conductivity. If the controller should require calibra-
tion, follow the instruction below. Please contact your local Marley sales
representative, if you have any questions regarding the procedure.
Because the conductivity measurement is affected by the physical environ-
ment in which it operates, it is best to calibrate while installed in the system
and operating under normal conditions. This requires an accurate external
conductivity measurement device to serve as a reference.
1. Operate WaterGard long enough for the membranes, operating
temperature and product permeate conductivity reading to stabilize,
ideally at least 10 minutes.
2. Take a sample of the product permeate and measure it with the reference
meter.
3. With the system ON, press and hold the UP and DOWN arrows. With
the UP and DOWN arrows depressed, press the System On/Off button.
4. Enter the Permeate Calibration menu using the down arrow. Once at the
menu, follow the on screen directions and use the UP or Down arrow until
the value on the controller matches the value obtained on the reference
meter.
Advertisement
Table of Contents
