Hach Ultra Low Range CL17sc User Manual page 18

Option
CL2 EXPOSURE
DEFAULT
SETTINGS
SERVICE
4.2 System configuration
Refer to the controller documentation for system configuration, general controller settings and setup
for outputs and communications.
4.3 User navigation
Refer to the controller documentation for keypad description and navigation information.
Push the RIGHT arrow key on the controller multiple times to show more information on the home
screen and to show a graphical display.
Section 5 Operation
5.1 Show the chlorine exposure
1. Push home to show the home screen.
2. Push the RIGHT arrow key until "FLOW RATE" and "CL2 EXPOSURE" show on the display.
Note: The CL exposure count on the home screen increases after each chlorine measurement. If the last
2
chlorine measurement was 40 ppb, the CL
0.00167 ppm*hr).
The chlorine measurement is multiplied by 1/24 because the analyzer completes 24 measurements each hour.
3. Scroll down to select CL2 EXPOSURE, then push the RIGHT arrow key to show a trend chart.
4. To change the time or measurement range of the trend chart, push the home key when the trend
chart shows on the display.
5. To go back, push the LEFT arrow key or home.
5.2 Data, event and service logs
Note: During the first hours after installation, the chlorine measurement on the display may be 0.00 ppm (or 0 ppb),
but the actual chlorine concentration is higher. The low chlorine measurement is caused by the chlorine demand of
the new sample tubing and system.
18 English
Description
VIEW CL2 HISTORY—Shows the values that follow:
• CURRENT VALUE—CL
• LAST SAVED VALUE—CL
exposure count was set to zero. A maximum of three CL
counts and their related start and end dates show on the display.
Note: LAST SAVED VALUE shows 0.00 ppm*hr and the date and time the
instrument was first set to on until the CL
SET EXPOSURE LIMIT—Sets the chlorine exposure alarm setpoint.
Enter the membrane chlorine exposure limit supplied by the membrane
manufacturer. When the CL
more than the CL exposure alarm setpoint, a HIGH EXPOSURE
2
warning occurs. Refer to
RESET TO ZERO—Sets the CL
zero. In addition, saves the last CL
CL2 HISTORY screen.
Select YES to change the configuration settings back to the factory
default values.
For service use only
exposure count increases by 40 ppb x 1/24 hour = 1.67 ppb*hr (or
2
exposure count on the home screen
2
exposure count saved when the CL
2
exposure count is set to zero.
2
exposure count on the home screen is
2
Warnings—Yellow light
exposure count on the home screen to
2
exposure count to the VIEW
2
2
exposure
2
on page 26.