COSA Xentaur Xentaur HDT - Manual (Page 11)

HDT User’s Manual
page 4
2.2 Sensor Technical Specifications
Type: .................................Hyper Thin Film high capacitance Al
2
O
3
.
Dewpoint range:
XTR-100 ........................-148°F to +68°F (-100°C to +20°C)
XTR-65 ..........................-85°F to +68°F (-65°C to +20°C).
XTR-60 ..........................-76°F to +68°F (-60°C to +20°C).
XTR-LQ.........................for use in liquids.
Capacitance:......................15nF to 200nF.
Accuracy: ..........................±5.5°F (±3°C).
Repeatability: ....................±0.9°F (±0.5°C).
Response time: ..................see graph in Appendix I.
Temperature range: ...........-10°C to +70°C.
Sample Flow range: ..........(linear velocity @ 1ATM):Static to 100m/s.
Storage temperature: .........-40°F to+176°F (-40°C to +80°C).
Mechanical:.......................encapsulated in 100
µ sintered stainless steel.
Calibration method: ..........NIST/NPL traceable multi-point factory calibration.
2.3 Sensor Installation & Sampling Techniques
Keep in mind that the moisture content at the sensor is not
only due to the moisture of the gas being measured, but also
due to desorption of water from tubing, trapped moisture (at
the interconnection points, valves, filters and other hygro-
scopic materials in the system), leaks in the system, and oth-
ers. Thus the measurement may vary from the expectation,
and therefore care should be taken in choosing the sampling
technique utilized in the measurement. Factors such as gas
pressure, flow rate, materials of construction, length and
diameter of tubing, number of interconnecting fittings, dead
space in tubing and manifolds; will influence the measure-
ment value and response time.
The high capacitance HTF™ sensors can be installed either
directly in the line to be sampled (in-situ), or in a slip stream
of a sample system (extractive).
To assure a long and accurate performance of the sensor, it
should be protected from contaminants such as liquids