4
O&M Manual
Rev-K (11/18)
Part 1 - Introduction
1.1
General
The Model Q46H/63 is a versatile on-line monitoring system designed for the continuous
measurement of combined chlorine in solution. The full scale operating range of the system is
user selectable for 0-200.0 ppb, 0-2.000 ppm, 0-20.00 PPM, or 0-200.0 ppm, and the sensing
system will operate on water streams with temperatures from -5 to 55
°
C. The Q46H/63
Combined Chlorine Measurement System is well suited for chloraminated potable water systems,
activated carbon filter break-through detection, and for monitoring wastewater treatment effluents
where sufficient ammonia is present to insure that the majority of the chlorine residual is
monochloramine.
The basic sensing element used in the combined chlorine monitor is a polarographic membrane
sensor which measures chlorine directly. Water simply flows past the sensor and directly to
drain, with the flow rate and pressure across the sensor controlled by a constant head flow cell
assembly. The chlorine measurement does not alter the sample or add any chemicals to the
sample stream, so the water flow can return to the system if desired.
Q46H/63 Monitors are available in two basic electronic versions, a 90-260 VAC powered monitor,
or a 12-24 VDC powered monitor – both with three relays and two 4-20 mA analog outputs. Both
versions allow flexible output options which include additional 4-20 mA current outputs, additional
0-30 VDC signal relays, PID control, and digital communication cards.
In addition to normal chlorine measurement, the Q46H/63 is also available with an optional pH
input which provides a two-parameter monitoring system. Both combined chlorine and pH are
displayed simultaneously.
