HF scientific CLX Online Residual Chlorine Monitor - Manual (Page 16)

CLX (1/12) Page 11
REV 5.1
5.0 Operation
The CLX Online Chlorine Analyzer allows for the measurement of the chlorine of process
water on-line. The chlorine value of the process water is usually reported in milligrams
per Liter (mg/L), these units are equivalent to Parts Per Million (PPM).
Readings above 10.00 mg/L are outside the range of this instrument. Although the CLX
may display above 10.0 mg/L, these readings will not be within the stated accuracy. As
the reagents degrade due to aging, readings above 10.0 mg/L may decrease in value.
5.1 Routine Measurement
First, ensure that all plumbing and electrical connections are complete before continuing.
The following steps describe how to measure the value of chlorine of a sample using this
instrument:
1. Apply power to the instrument and allow the unit to warm up (typically 45 minutes to
one hour on initial commissioning).
2. When a continuous process stream is flowing through the instrument, the instrument
will display the measured chlorine level of the sample by displaying it on the LCD
screen. In addition, the equivalent signal is provided on the analog (4-20 mA) output,
or the digital (RS-485) output, depending on the options selected.
During normal operation, the instrument will have the arrow beside AUTO highlighted
with the current scale displayed on the lower row of the display and the measured reading
on the upper row of the display (see illustration below).
The screen depicted below indicates that the system has just been started or just entered
AUTO mode from Service mode and no readings have been taken yet.
Please note that calibrations will not be allowed until a reading is posted.