Partlow MRC7700

A special purpose instrument with analgorithmto automatically calculate relative humidity from wetbulb and drybulb temperatures. A microcontroller based, one or twopen, 10"circular chart recorder, available in three versions;basicrecorder, recording controller, and recording profilecontroller.The controller is capable of controlling any processfrom simpleon/off to dual 4-20mA outputs with full PID on bothpens. Can bepanel or surface mounted.

Standardfeatures

• Selectable process value display foreachpen: wet bulb, dry bulb, or RH.
• Compensation for barometricpressurechanges
• 4 Digit display per pen
• Universal Isolated sensorinput:thermocouple, RTD, mA, mV, or V
• Chart speed from 0.1 to 999.9 hours
• Disposable fiber tipped pens:red,green

Optional capabilities

• 2 Programmable alarms per pen
• Up to 8 relay type outputs
• Up to four 4-20mA outputs
• Process value retransmission
• RS-485 Communications
• 24V Transmitter power supply
• Door lock
• Water-tight enclosure

Optional controller capabilities

• On-off, time proportioning, orcurrentproportioning
• Single or dual control output
• Position proportioning for use withslidewirefeedback
• Relay, SSRD, or mA outputs
• Remote setpoint input

Optional profiler capabilities

• Profile one or two pens
• 8 Profiles, each with 6 ramps and6soaks
• Up to 6 event relay outputs
• Remote Run/Hold

KeySpecifications

• Measurement accuracy: +/- 0.25%
• Recording accuracy: +/- 0.5%
• RH calculation accuracy: typically+/-1%
• 1 Scan per second
• 5A SPST or SPDT Relay outputs
• 13.19" H x 15.13" W x 3.63" D
• 115 or 230 (optional) VAC powered
• 3 Year warranty

Agency Approvals

• UL Listed
• CSA Certified
• CE Compliance (optional)

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