Michell Instruments XTC601, Руководство пользователя, Страница: 55 / 80

XTC601 User’s Manual
Michell Instruments 45
APPENDIX A
A.2 XTC601 for Monitoring Hydrogen Cooled Generators
Performance
Phase
Phase 1 –
H
2
in Air
Phase 2 –
H
2
in CO
2
Phase 3 –
CO
2
in Air
Measurement Range
80–100% or
90–100%
0–100% 0–100%
Display Resolution 0.01% 0.1% 1%
Response Time (T90) < 20 seconds < 20 seconds < 50 seconds
Recommended calibration Monthly Prior to use Annually
Measurement Technology Thermal Conductivity sensor
Gas Requirements Non-condensing sample with particles <3μm
Display Type Backlit LCD
Repeatability ±0.2% of span
Linearity ±1% span
Sample Flow Rate 270 to 330 ml/min (0.57 to 0.7 scfh)
Sample Pressure
Analyzers are factory calibrated and must be operated with a
nominally atmospheric pressure.
Maximum Safe Pressure 1 barg (14.5 psig)
Sample Temperature 0 to 45°C (+32 to +113°F) max
Sample Cell Temperature St50°C (+122°F)
Electrical Specifications
Analog Inputs
2 off 4–20mA inputs
One to control phase selection
One for an external sensor that can be displayed on the screen
Analog Outputs
2 off 4–20mA outputs:
mA 1 = Concentration
mA 2 = Phase indication
Alarms
2 off single pole changeover (SPCO) relays for concentration
(250 V, 5 A max)
Digital Communications Modbus RTU over RS485 Protocol
Power Supply 24 V DC; 1.5 A max
Operating Conditions
Ambient Temperature
0 to 40°C (32 to 104°F)
Mechanical Specification
Warm Up & Stabilization Time < 30 minutes
Dimensions 234 x 234 x 172mm (9.2 x 9.2 x 6.7”) (w x d x h)
Weight 9.7kg (21.4lbs)
Wetted Materials 316 stainless steel, boroscillicate glass, platinum, (plus O-ring)
O-Ring Materials Viton
Gas Connection 1/8” NPT Female
Ingress Protection IP66, NEMA 4
Hazardous Area Classification – See Appendix F