4
O&M Manual
Rev-H (6/19)
Part 1 - Introduction
1.1
General
The Model Q46C2 Conductivity monitor/analyzer provides an extremely versatile measurement
system for monitoring and control of resistivity/conductivity over the range of 0.056 µS/cm to
2000 µS/cm. The instrument display range is programmable for conductivity ranges of 0-2.000, 0-
20.00, 0-200.0, and 0-2000 microsiemens and for resistivity ranges of 0-20.00 M
Ω or 0-200 kΩ. In
addition, the monitor can be programmed to display TDS (Total Dissolved Solids) or percent
concentration. If data is available, a customized concentration table can be created.
Monitors are available in two electronic versions, a universal AC powered monitor for operation
from 90-260 VAC and a 12-24 VDC unit. Both versions provide two 4-20 mA analog outputs and
3 SPDT relays. One analog output may be configured for PID control and one of the relays may
be configured to provide a remote trouble indication.
In all configurations, the Q46C2 displays conductivity, sensor temperature, TDS, and output loop
current on the secondary line of the custom display. The instrument is used with the Q25C2
sensors or other compatible 2-electrode sensors. Q25C2 sensors are available in either 0.05K or
0.5K cell constants and in submersible, in-
line, or 1 ½” sanitary versions.
WARNING:
Not following operating instructions may impair safety.
