Michell Instruments QMA401, Руководство пользователя

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QMA401 User’s Manual
62 97450 Issue 2, March 2018
APPENDIX A
Appendix A Technical Specification
Performance
Measurement
Technology
Fast Response Quartz Crystal Microbalance
Calibrated Range 0.1 to 700ppm
V
Measurement Range 0.1 to 2000ppm
V
Accuracy
±10% of reading from 1 to 2000 ppm
V
±0.1 ppm
V
between 0.1 & 1 ppm
V
Repeatability
±5% of the reading from 1 to 2000 ppm
V
±0.1 ppm
V
between 0.1 & 1 ppm
V
Detection Limit 0.1 ppm
V
Available Units ppm
V
, ppm
W
, mg/m
3
, vapor pressure (Pa), frost point (°C), lbs/MMscf
Response Speed
T63 <2 mins to step change in either direction
T95 <5 mins to step change in either direction
Automatic Calibration Internal moisture generator source calibrated traceable to NPL & NIST
Sensitivity
0.1
ppm
V
or 1% of reading, whichever is greater
Electrical Specifications
Supply Voltage 85 to 264 V AC, 47/63Hz, 110 to 300 V DC
Max Power
Consumption
111W
Alarms
1 x System Alarm, volt-free change-over (FORM C)
3 x process alarms, selectable for various parameters, volt free change-
over (FORM C)
Communications
Analog Outputs: 2 channels, user selectable 4-20 mA or 1 to 5 V
Digital Communications: RS485/USB Modbus RTU, Ethernet Modbus TCP
Data logging
Logging to SD card at user-selectable interval or to PC via application software
Local Interface 7” color touch screen LCD
Operating Conditions
Inlet Pressure
1 barg max (14.5psig)
With optional inlet pressure regulator: 300 barg max (4351psig)
Outlet Pressure Atmospheric
Sample Flow 300ml/min total flow without bypass
Sample Gas
Temperature
0 to +100°C
Operating Envir5 to +45°C (+41 to +113°F) up to 90% RH
Mechanical Specifications
Enclosure 19" Rackmount, 4U x 434 mm
Gas Connections 1/4” VCR(M)
Weight 13.5 kg (29.8 lbs)