Updated:2023-10-13
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Reference Hygrometer Controlled Humidity Generation
Features
Automatic calibration system with reference hygrometer
Wide range of humidity generation 1 to 95% RH, -50 to +50°Cdp
High accuracy ±0.1°C fundamental reference
User-configurable temperature and humidity profiling allows calibration cycles to be run without constant supervision
Very fast changes between generated relative humidity points
The Michell HG10 Humidity Calibration System is a computer-controlled automatic calibration system for humidity sensors. The HG10 is capable of repeatable generation of temperature and relative humidity set points over the range 1 to 95% RH (-50 to +50°Cdp) at temperatures of +20 to +50°C with excellent stability. The supplied chilled mirror reference instrument provides traceability directly to national standards and makes the system suitable for use in high-level calibration laboratories.
The supplied PC software allows the creation of automatic calibration programs, for evaluating the performance of humidity sensors over a range of operating conditions. The measured values from the chilled mirror reference are used in a closed control loop to enable repeatable set point generation, time and time again.
Specification
General | |||
Enclosure | 19” Rack System, H= 2.1m | ||
Power Supply | 100 to 115 V or 220 to 240 V 50/60Hz | ||
Pressure Swing Dryer | |||
Gas Output |
Flow: 7 Nl/min Pressure: 0.68 barg Moisture Content: <1ppmV (<-75°Cdp) |
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Required Gas Supply |
Flow: 10 Nl/min Pressure: 5 to 7 barg Moisture Content: Oil and liquid water free |
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Type | Twin column desiccant, pressure swing | ||
Desiccant | 4 Ångström Molecular sieve bead (4-8 mesh) | ||
Timer | Motorized cam | ||
Operating Temperature | +5 to +35°C | ||
Generator | |||
Generation Range |
Humidity: 1 to 95% RH (-50 to +50°Cdp) Temperature: Dependant on temperature chamber |
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Generated Gas Output | Air 2 Nl/min @ 0.5 barg via heat traced line | ||
Dual Stage MFC Mixing | Dual mass flow controllers | ||
Power Consumption | 550 V A maximum | ||
Dual Stage MFC Mixing | Dual mass flow controllers | ||
Operating Temperature | +5 to +40°C; 10 to 90% RH | ||
Enclosure | 19" Rack System, H= 2.1m | ||
Control System | Closed loop feedback | ||
S8000 Dew-Point Sensor Performance |
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Performance | |||
Accuracy | ±0.1°C (±0.18°F) | ||
Reproducibility | ±0.05°C (±0.09°F) | ||
Measurement technology | Chilled Mirror | ||
Sensor | 2-Stage | High Temp PEEK | Climatic head |
Dew-point range | –40°Cdp@ sensor temp of +20°C +90°Cdp @ sensor temp of +90°C | –40°Cdp @ sensor temp of +20°C +120°Cdp @ sensor temp of +120°C | –10°Cdp @ sensor temp of +20°C +120°Cdp @ sensor temp of +120°C |
Temperature range | –40 to +90°C | –40 to +120°C | –40 to +120°C |
%RH range | <0.5 to 100% | <0.5 to 100% | 10 to 100% |
Min measured dew point @ 20°C | –40°C | –40°C | –10°C |
Mirror material options | Gold plated copper (standard), gold stud, Platinum stud** | ||
Sensor body material options | Acetal (standard), high temperature PEEK, Anodized aluminum** | ||
Response speed | 1°C/sec (1.8°F/sec) plus settling time | ||
Operating pressure | 20 barg (290 psig) standard pressure High version: 250 barg (3625 psig) max | ||
Remote PRT | |||
Temperature measurement | 4 wire Pt100, 1/10 DIN class B | ||
Accuracy | ±0.1°C (±0.18°F) | ||
Cable length | 2m (6.6ft) (250m (820ft) max) | ||
Optional Remote Pressure Sensor | |||
Measurement range | 0 to 25 bara (0 to 377 psia) | ||
Accuracy | 0.25% Full Scale | ||
Measurement units | psia, bara, KPa or MPag | ||
Pressure transducer thread | 1/8” NPT | ||
Monitor | |||
Resolution | User-selectable to 0.001 dependant on parameter | ||
Measurement units | °C and °F for dew point and temperature %RH, g/m3, g/kg, ppm , %Vol, ppm (SF ), for calculated V W 6 humidities | ||
Outputs |
Analog Digital: 3 channels, user selectable 4–20 mA, 0–20 mA or 0–1 V Modbus RTU over USB and optionally Modbus RTU over RS232 or RS485, or Modbus TCP over ethernet. Alarm: Two volt free changeover contacts, one process alarm, one fault alarm; 1 A @ 30 V DC |
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HMI | 5.7” LCD with touchscreen | ||
Data logging | SD Card (512Mb supplied) and USB interface SD Card (FAT-16) – 2Gb max. that allows 24 million logs or 560 days, logging at 2 second intervals | ||
Environmental conditions | –20 to +50°C (–4 to +122°F) | ||
Power supply | 85 to 264 V AC, 47/63 Hz | ||
Power consumption | 100 V A | ||
Mechanical specifications | |||
Dimensions (instrument) | 190 x 255 x 215mm (7.5 x 10.0 x 8.4”) h x w x d | ||
Dimensions (sensor) | ø45 x 128mm with M36 x 1.5-6g mounting thread | ||
Weight | 4.2kg (9.26lbs) | ||
Cable lengths | 3, 5 or 10m (9.8, 16.4 or 32.8ft) | ||
General | |||
Storage temperature | –40 to +60°C (–40 to +140°F) | ||
Detection system | Single optics detection system with auto adjustment | ||
Calibration | 4-point traceable in-house calibration as standard; UKAS accredited calibrations optional – please consult Michell Instruments |
Suitable Applications
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