The 10" microprocessor-based Partlow MRC 7700 circular chart recorder is capable of measuring, displaying,
recording, and controlling relative humidity and/or temperature using Dry Bulb and Wet Bulb temperatures
from a variety of inputs. With its automatic calculation feature, the Partlow MRC 7700 circular chart recorder
eliminates the need to use charts, graphs, and arithmetic to manually figure relative humidity.
The Partlow MRC 7700 circular chart recorder uses a special algorithm to calculate relative humidity and
compensate for barometric pressure changes and temperature differences, which increases accuracy and saves
time. Using the wet-bulb/dry-bulb sensing rather than a humidity sensor, the Partlow MRC 7700 circular chart
recorder operates efficiently and accurately even in elevated ambient temperatures and dirty environments
that normally harm humidity sensors.
Partlow MRC 7700 circular chart recorders also offer many valuable features including auto transfer, position
proportioning output, remote setpoint, remote run/hold, auto/manual operation, and setpoint lock-out. Other
features of the Partlow MRC 7700 circular chart recorder include output limiting, ten-inch circular chart, displays
for each process value, no DIP switches, full parameter programming with large tactile keys, up to six-events,
and relay outputs or SSR drivers. Two alarms per channel (process/deviation/deviation band reverse or direct),
eight profiles with six ramp/soak segments each, and process value retransmission are also featured on the
Partlow MRC 7700 circular chart recorder.
In addition, the Partlow MRC 7700 circular chart recorder has a security enable mode system feature which
protects all parameters and data from unauthorized changes. Each version may be specified with an RS-485
communications option for easy access to process variables via your computer.
Applications for the Partlow MRC 7700 Circular Chart Recorder
The Partlow MRC 7700 circular chart recorder's control, recorder, and security functionality are designed specifically
for Relative Humidity applications including:
- Process validation and trend analysis
- Relative humidity
Appropriate industries for the Partlow MRC 7700 circular chart recorder include oven, chamber, furnaces, heat
treating, food processing, and harsh water environments.
