Teledyne Analytical Instruments
28
Thermal Conductivity Analyzer Model 212R
APPENDIX
Specifications
:
Ranges:
Three decade ranges: Minimum Full scale(ppm)
20 ppm Hydrogen balance Argon
25 ppm Hydrogen balance Nitrogen, Air
100 ppm Nitrogen balance Argon, Helium
100 ppm Helium balance Air
150 ppm Nitrogen, Carbon Monoxide balance Hydrogen
200 ppm Oxygen balance Argon
Range ID:
3 range ID contacts
Local Range ID LED’S
Detector:
Thermal conductivity sensor
Signal Output:
0-1VDC negative ground
4-20maDC Isolated ground
Accuracy:
±2% full scale for most binary mixture
at constant temperature. ± 5% of Full
Scale over operating temperature (once
temperature equilibrium has been achieved)
Operating
Temperature:
20 – 30°C (68° F to 85° F)
Sample
Requirement:
Sample: 0.3SCFH
Reference: 0.1SCFH
Display:
Digital LED read out (3½ Digit)
Mounting:
Flush panel mount.
Response Time:
90% of full scale less then 60 seconds.
For most application.
Stability:
Less then 2% full scale drift over 24
hours
Power
requirement:
110VAC, 50/60Hz (220VAC optional)