Hach CL17 User Manual

Section 4
Page 55
54400_trouble.fm System Warnings
4.3 System Warnings
Recall active warnings using the RECALL WARNINGS function in the alarm
menu. To clear the warnings use the
CLEAR WARNINGS function in the alarm
menu.
Table 6 System Warnings
Warning What the Alarm Indicates
Alarm Display and
Instrument Indication
Resolution
POWER
Power failed. In default condition, this warning is
disabled.
POWER
Inspect wiring and circuit
breakers that deliver
power to the CL17.
Low Signal
Reference measurement is less than 2000 A/D
counts.
LOWSIG
Clean sample cell
Replace sample cell
Marginal
Gain
A calibration resulted in a gain correction factor
greater than 1.1 or less than 0.9. The calibration
standard and the value that the operator is
attempting to input do not match. Re-test the
calibration standard and perform a new calibration
on the CL17.
MARG G
Set CAL Defaults.
Verify standard value.
Recalibrate the
instrument.
Marginal
Zero
A calibration resulted in an offset correction factor
greater than 0.2 and less than 0.5.
MARG Z
Set CAL Defaults.
Verify zero value.
Recalibrate the
instrument.
Marginal
Offset
A high offset count was measured with the LED
off. Usually caused by light leaks.
MARG 0
Verify the colorimeter
end caps are firmly
screwed in place.
Check for light leaks.

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)