Hach-Lange CL17 USER MANUAL - Manual (Page 37)

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Operation
Adjust the recorder output minimum and maximum values using the analyzer keypad:
1. Press the MENU key.
2. Scroll to RECR DR menu and press ENTER . The display will show REC LO and a mg/L
reading. Move to REC HI or ON SYSTEM ALARM .
3. Press ENTER to change the displayed mg/L reading for REC LO or REC HI . The digit
to be changed will flash.
4. Change the digit or move to another digit. Appropriate values and selections are
shown below. When the value is correct, press ENTER to accept.
• REC LO—0.0 mg/L to 5.0 mg/L limits.
• REC HI— 0.0 mg/L to 5.0 mg/L limits.
• ON SYSTEM ALARM—Select minimum, maximum, or hold to define the recorder
output when a system alarm is initiated.
5. Press EXIT to return to the main menu. Press EXIT again to return to normal
operation.
5.2.3.1 Change to 0 to 20 mA output range
Set the lower end of the output range to 0 mA instead of 4 mA as follows:
1. Press the MENU key then scroll to the SETUP menu. Press ENTER .
2. Scroll to REC ADJUST and press ENTER .
Note: A large number may be displayed for the minimum value, this number refers to counts, not
milliamps. Proceed with step 4.
3. Adjust the displayed value to 0. Press ENTER to accept the value. Press EXIT twice to
return to normal operation.
5.2.4 Maintenance menus
The following selections allow the user to perform standard maintenance tasks. Use the
ARROW keys to scroll through the menu selections, then press ENTER to select the
displayed menu option.
• PRIME—This feature causes the analyzer to make 39 concurrent accelerated cycles
to prime the reagent lines. Press
ENTER to activate. At the end of 39 cycles, the
analyzer will return to normal operation. To terminate the prime cycle before all 39
cycles are complete, press
EXIT . The analyzer will return to normal operation.
• CLEAN—This feature stops the analyzer in the last portion of the measurement cycle.
Sample and reagents are left in the sample cell for cleaning purposes. The analyzer
remains in the clean mode for 60 minutes. To terminate the cycle earlier, press the
EXIT key. The analyzer will return to normal operation.
• HOLD OUTPUTS—This feature allows the alarms to be locked out and the recorder
output to be held at its present level for maintenance purposes. Activate this feature
as follows:
a. Press ENTER then the UP ARROW key to activate for 60 minutes. The alarm LED
will be flashing.
b. To deactivate the feature, and return to normal operation, press the MENU key
then the DOWN ARROW key until HOLD OUTPUTS is displayed.
c. Press ENTER .
d. Select OFF and press ENTER again.