GE Osmonics E4H Series, Operation And Maintenance Manual

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E4H Series
Operation & Maintenance Manual
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4. Select process to control (pH, conductivity, etc.) by pressing its number.
5. Press 1 to enter SETPOINT values for that relay. Simply use the keypad numbers to enter the
proper value and press ENT. When finished, you will automatically be moved down to the next
value.
1. Enter SETPOINT value
2. Enter DEADBAND value
“Deadband” refers to a range above and below the setpoint within which the monitor will not
react. Using a deadband range reduces the chance of erroneous or nuisance relay activity due to
temporary fluctuations in monitored levels. It should be a small percentage of the setpoint. Half
the deadband amount will automatically be put above the setpoint, and the other half below. For
example, a pH setpoint of 7.00 pH units in DIRECT mode, with a deadband of 0.10 pH units would
result in a system that turns the relay ON at 7.05 and OFF at 6.95 pH. The same setpoint in
REVERSE mode would turn the relay ON at 6.95 and OFF at 7.05 pH units.
3. Enter TIMEOUT value (maximum 17 hours 59 minutes)
6.
Press 2 to enter SETPOINT directions.
A. Press 1 to enable DIRECT control. (The relay opens below setpoint, e.g., relay controlling acid
injection for pH control. That is, when pH rises above the setpoint, the relay closes and allows
injection of more acid.)
B. Press 2 to enable REVERSE control. (The relay opens above setpoint, e.g., relay controlling
caustic injection for pH control. That is, when pH falls below the setpoint, the relay closes and
allows injection of more caustic.)
7. When finished with all setpoint entries, you can press CLR three times to select another relay.
Or, press CLR four times to return to the MAIN MENU.
A.5 Technician, Security, and Operator Level Menus
The model 2450 monitor is menu-driven for easy use. Once you become familiar with the menu
options, it will be easy to perform set up and calibration procedures. This section of the manual
provides a comprehensive overview of the entire menu as shown from each security level. In order to
lead off with a complete look at the menu, the levels are shown in the following order: 3) TECHNICIAN,
2) OPERATOR, 1) VIEW ONLY. Once you review the instructions in this section and learn the menu
options, you will be able to perform your own set up and calibration using these examples to guide
you through the process. The model 2450 offers three optional security levels: 1) VIEW ONLY, 2)
OPERATOR and 3) TECHNICIAN. A password is required to change from one security level to another.
Each level has its own factory-preset password (2222 for TECHNICIAN, 1111 for OPERATOR), but your
water treatment engineer can also designate personalized passwords from the TECHNICIAN Level
menu. The following pages illustrate the menu screens available in each security level.
NOTE
: If you personalize passwords, make sure they are recorded in a safe and secure place.