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MRC 7700 RH Recorder / Controller / Profiler
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Quick Specs...
- True wet bulb/dry bulb capability providing a precise environmental chamber relative humidity level.
- Compensation for barometric pressure delivering relative humidity accuracy better than 1%.
- Up to eight profiles (ramp/soak) offering environmental chamber control - powerful capability in one package.
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Overview / Design Principle:
The MRC7700 Relative Humidity Recorder is a microprocessor based circular chart profile recorder capable of measuring, displaying, recording and controlling relative humidity and/or temperature using Dry Bulb and Wet Bulb temperatures from a variety of inputs. Record and control functions, alarm settings and other parameters are easily configured via the keys on the front cover and self-prompting displays. NEMA 3 protection and sealed door lock optional.
Features and Benefits:
- Micro-based recording controller with relative humidity profile capability
- Two displays—allowing you to see critical process values at the same time
- Easy, straightforward programming—allows you to configure your recorder with a logical step-by-step process using a simple keypad
- True time based profiling capability puts you in control of your process
- Reliability—maintenance-free recording for years to come
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Applications:
Record, control and security functionality designed specifically for Relative Humidity Applications
- Process Validation
- Trend Analysis
- Relative Humidity
Industries:
Oven, chamber, furnaces, heat treating, food processing, harsh water environments
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| Functionality: |
Digital |
| Display: |
2 digital displays: 0.56½ high, red, seven segment LED; 3 button keypad; automatic and decimal point positioning. |
| Decimal Positions: |
None, one, two or three decimal places. |
| Programmable Profiles: |
Up to 8 user programmable profiles on profile version. |
| Status Indicators: |
7 LED status indicators: Out 1, 2, Man, Ramp, Soak, Seg 1–6; one green LED pen 2 indicator. |
| Chart: |
10½ circular chart; 100 charts furnished with each instrument. Unless otherwise specified, charts shipped with instrument are 0–100 range. 24 hour rotation default setting. |
| 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. |
| Pen Color: |
Pen 1 (red); Pen 2 (green). |
| Memory Backup: |
Battery; 5 year normal life. |
| Construction/Enclosure: |
Structural foam enclosure with plastic cover standard. |
| Operating Temp: |
32° to 122°F (0° to 50°C). |
| Storage Temp: |
–40° to 149°F (–40° to 65°C). |
| Humidity: |
0% to 90% non-condensing R.H. |
| Vibration: |
0.5 to 100Hz @ 0.2g. |
| Electro Static Discharge: |
No effect from 5000V static charge over the entire area. |
| RFI: |
Degradation due to RF fields to recording and output accuracy to 8% at spot frequencies in the range of 100–1000MHz. |
| Power Consumption: |
25VA max. |
| Line Voltage: |
115V ±10%, 50–60Hz standard; Optional 115/230VAC±10%, 50–60Hz. |
| Thermocouple: |
J, K, T, R, S, E, B, N, C. |
| RTD: |
100 ohm, platinum; 0.00385 ohms/ohm/°C. |
| Volts: |
0–5 VDC; 1–5 VDC. |
| DC Milliamps: |
4–20mA, 0–20mA. |
| Control 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. |
| Alarm/Event Outputs (Options) |
| 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. |
| Process Alarm: |
Direct (High) or Reverse (Low) –9999 to 9999 units. |
| Deviation Alarm: |
Direct (Deviation above setpoint) or Reverse (Deviation below setpoint) –3000 to 3000 units. |
| Deviation Band Alarm: |
Open or closed 1 to 3000 units. |
| Alarm Hysteresis: |
0–300 units (width of hysteresis band). |
| General |
| Input Measurement Error: |
Type J, K, T, E, N, C, T/C and RTD ±0.25% of reading plus 1 degree @ 25°C; Type R, S, B, C, T/C ±0.25% of span @ 25°C. |
| Ambient Temperature Error: |
0.01% of span per degree C deviation from 25°C. |
| Cold Junction Compensation Error: |
±0.2% @ 25°C. |
| Cold Junction Compensation Rejection: |
±0.04% deviation from 25°C. |
| Common Mode Rejection: |
90dB minimum; 24VAC maximum for RTD input; 115VAC maximum for other inputs. |
| Normal Mode Rejection: |
85dB minimum @ 60Hz or greater. |
| Chart Accuracy: |
Recording: 0.5% of span. |
| Chart Rotation: |
±0.5% of rotation time. |
| Algorithm Accuracy: |
Typically better than 1%; however, actual user accuracy will be dependent upon the quality of the sensors used, the proper installation of the sensors, the input correction adjustments and the barometric pressure adjustments. |
| Scan Rate: |
1 scan/second. |
| Noise Rejection: |
Normal mode: 85dB minimum at 60Hz or greater.
Common mode: 90dB minimum at 115VAC maximum. |
| Sensor Fault Detection: |
Displays SNSR for sensor break; outputs go off; PV output to 100%; event status remains the same; fault detection is not a function for 0–5V or 0–20mA inputs. |
| Transmitter Power Supply: |
Provides up to 40mA of current at 24VDC. |
| Process Value Output Error Limit: |
0.5% of span. |
| Record Error Limit: |
±0.5% of chart span or better typically; ±1.0% of chart span maximum. |
| Profile Parameters (optional) |
| Programmable Profiles: |
8 user-programmable profiles. |
| Segments: |
1–6 segments per profile. |
| Ramp and Soak: |
1 ramp and soak per segment. |
| Profile Time Base: |
User-selectable; choose from hours and tenths (HHH.T), hours and minutes (HH.MM) or minutes and seconds (MM.SS). |
| Profile Interruption Action: |
Upon return of AC power either go to OFF mode; continue profile, go to HOLD mode or restart profile at beginning. |
| Profile Loop Count: |
1–9999; 0 = continuous. |
| Profile End Control: |
User-selectable; hold at last setpoint; Abort (all outputs off or 0%); transfer to another profile. |
| Assured Soak: |
Deviation Hold after Ramp Down; 1–3000 units; 0 = No Auto Hold. |
| Pen Profiling Configuration: |
Pen 1 only or Pen 1 and 2. |
| Remote Run/Hold: |
User-selectable; override Run/Hold key; Allow Run/Hold key function. |
| Event Output(s): |
Up to 3 event outputs possible; each event can be set on or off for each ramp and soak. |
| Communications Port: |
RS-422/485 serial, half duplex. |
| Protocol: |
Partlow ASCII |
| Bit Rate: |
User-configurable 300, 600, 1200, 2400, 4800 or 9600/sec. |
| Address: |
User-configurable for each pen 0–99. |
| Safety: |
L 1092 File E67237; CSA Spec C22.2 File LR39885, CE EN61010-1 1993/1995 |
| Immunity: |
CE EN50082-1:1992 |
| Emissions: |
CE EN55011:1991 |
| Limit Device: |
N/A |
| Other: |
ISO 9002 registered. |
| Enclosure: |
NEMA 3 enclosure optional; CE compliance optional. |
| Width: |
15.13" (384mm). |
| Depth: |
3.63" (92mm). |
| Height: |
13.19" (335mm). |
| Weight: |
20 lbs (9.1kg). |
| Mounting/Mounting Position: |
Panel or wall. |
- RS-485 communication option.
- 24V DC transmitter power supply option.
- 115 or 230VAC input option.
- Door lock and sealed conduit/connector option.
- CE compliance optional.
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Available Specifications:
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