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Partlow MRC 7800 Chart Flow Recorder

The MRC 7800 Flow Recorder is a microprocessor based circular chart recorder capable of measuring, displaying, recording and totaling flow process variables based on an analog signal from any flowmeter.
Circular Chart Recorder for Recording Flows from Analog Flowmeters
Circular Chart Recorder for Recording Flows from Analog Flowmeters

Three square root extraction algorithms are available for use with a variety of transmitters and transducers, and four algorithms are available for use with a variety of weirs and flumes. Record functions, alarm settings, and other parameters are easily configured from the front mounted keypad and self-prompting displays of the flow controller. Alarm settings are fully programmable. Alarm type may be set as Process high or low. Indication is via status LED's provided for each pen. Alarm outputs can be provided by assigning any specified relays (SPST, SPDT or SSR driver) to the respective alarm. All user data can be protected from unauthorized changes by the flow controller's Enable Mode security system. The MRC7800 Flow Recorder is protected against loss of data from AC power failures by a standard battery backup system. Applications for the Flow Recorder include wastewater influent and effluent, potable water well and raw water, treatment plant processes, and environmental monitoring sites.

All of the flow recorders listed below include a totalizer, display, and 24 VDC transmitter power supply; CSA approved 115/230 VAC, 50/60 Hz line voltage; two SPDT output relays; one or two 4-20mA retransmission outputs (depending on one or two input model); and a box of 100 starter charts (0-100/24 HR). Chart rotation speed is programmable from 0.1 to 999.9 hours per revolution in 0.1 hour increments. The flow controller can be provided with one or two pens. Pen 1 is red and Pen 2 is green. Pens are of the disposable fiber-tip type. Changes in pens, as well as charts, are quickly and easily accomplished. Other options such as a transmitter power supply, NEMA 3 enclosure and additional relays are available for the flow

Flow Recorders/Controllers Specifications

Functionality: Record or Diverse Record/Totalizer combination functions
Line Voltage: 115V/230VAC ±10%, 50–60Hz @ 25VA max; CSA approved
Display: 4 digit; 0.56” high, red, 7-segment LED w/3-button keypad
LED Indicators: Out 1, 2; one green pen 2 indicator; ALRM1 and ALRM2 indicators

Chart: 10” circular chart
Chart Drive: DC Stepper Motor
Chart Rotation: User configurable from 0.1 and 999.9 hours per revolution
Chart Range: Bottom and top of span –9999 to 9999 units
Pen Type: One or two disposable fiber tip pen(s)
Pen Color: Pen 1 (red); Pen 2 (green)

Memory Backup: Battery; 5 year minimum life

Enclosure: Injection molded Noryl case; acrylic window; panel or wall mount
Operating Temp: 32 to 122 F (0 to 50 C)
Storage Temp: –40 to 149 F (–40 to 65 C).

Outputs
Relay: SPST/SPDT; 115VAC 5.0A resistive, 1/8HP, 250VA; 230VAC 2.5A resistive, 1/8HP, 250VA
SSR Driver: Open collector output; short circuit protected @ 100mA max; provides 4VDC @ 20mA or 3VDC @ 40mA
Current: 0–20mA or 4–20mA; 0–650 ohm maximum load.
Process Alarm: Direct (High) or Reverse (Low); 0 to 9999 units.

Inputs
DC Milliamps: 0–20mA; 4–20mA (with included shunt resistor)
Volts: 0–5 VDC; 1–5 VDC
DC Millivolts: 0–100mV (can be scaled to any portion of this range)
Isolation: Inputs are a common ground signal
Input Error: mA, mV, and VDC ±0.25% of scaled span or better typically; ±1 least significant digit @ 25°C

Chart Accuracy: ±1% of chart span
Approvals: CE, UL, CSA, FM, ISO 9002 registered
Dimensions: 15.13" (384mm)W x 13.19" (335mm)H x 3.63" (92mm)D
Panel depth: 2.5" (64mm); panel protrusion: 1.3" (33mm)

Flow Recorders/Controllers Ordering Information

786801100022 MRC 7800 Flow Recorder/Controller includes one pen input, two relay outputs, one 4-20 mA retransmitter output, one display and totalizer.
788802100022 MRC 7800 Flow Recorder/Controller includes two pen inputs, two relay outputs, two 4-20 mA retransmitter output, one display per pen and totalizer.
789801100022 MRC 7800 Flow Recorder/Controller includes one pen input, two relay outputs, one 4-20 mA retransmitter output, two displays and a totalizer

Circular Chart Recorder Pens
CP410 Red Circular Chart Recorder Pen for input 1, 5 chart paper pens per pack.
CP411 Green Circular Chart Recorder for input 2, 5 chart paper pens per pack.

Circular Chart Recorder Paper
CP001 Range 0-100/24 Hr
CP002 Range 0-100/7 Day
CP003 Range 0-5/24 Hr
CP004 Range 0-5/7 Day
CP005 Range 0-10/24 Hr
CP006 Range 0-10/7 Day
CP007 Range 0-14/24 Hr
CP008 Range 0-14/7 Day
NOTE: A three box minimum order is required.

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