Hach CL17 User Manual

Section 2
Page 39
54400_start.fm Instrument Menu Structure
Alternatively, the output can be bracketed between 2–4 mg/L to control
chemical feeds, or the signal can be inverted by assigning a higher mg/L
reading for REC LO and a lower mg/L reading to REC HI.
Initially, select an output span that will cover the expected range of chlorine
concentration in the sample. Determine the correct minimum and maximum
values by monitoring chlorine values in your sample over time. Adjust the
minimum and maximum values if necessary, to obtain the best span for your
specific application.
Adjust the recorder output minimum and maximum values using the analyzer
keypad as follows:
1. Press the
MENU key.
2. Use the
DOWN ARROW key to scroll to RECR DR menu and press ENTER.
The display will show
REC LO and a mg/L reading. Press the DOWN
ARROW key again to 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. Press the
ARROW keys to 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.
2.7.3.1 Changing 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 use the UP ARROW key to scroll to the SETUP
menu. Press
ENTER.
2. Use the
DOWN ARROW key to 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. Use the ARROW keys to adjust the displayed value to 0. Press ENTER to
accept the value.
4. Press
EXIT twice to return to normal operation.
2.7.4 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.

Hach CL17 Specifications

General

Power Requirements	100-240 V AC, 50/60 Hz
Outlet Pressure	Atmospheric
Measurement Method	Colorimetric DPD method
Sample Interval	2.5 minutes
Operating Temperature	5 - 40 °C (41 - 104 °F)
Parameter	Free or Total Chlorine
Operating Humidity	5 - 95% non-condensing
Sample Temperature	0 to 40°C (32 to 104°F)
Sample Flow Rate	200 to 500 mL/min
Power Consumption	Approximately 50 W
Output	4-20 mA, RS-232
Relays	Two relays
Enclosure	NEMA 4X
Resolution	0.01 mg/L
Accuracy	±5% or ±0.03 mg/L (whichever is greater)