Description
For Studies of Buildings
On-site measurements of thermal resistance, R, are often applied in studies of buildings. Alternatives are to measure its inverse value, the thermal conductance which is called the Λ-value, or the thermal transmittance which includes ambient air boundary layer thermal resistance, the U-value. The measurements of R are based on simultaneous time averaged measurement of heat flux Φ and differential temperature, ΔT, (using two temperature sensors on each on a different side of the wall).
R = ΔT / Φ
High Accuracy
The ISO and ASTM standards give detailed directions concerning the measurement method, sensor installation and data analysis. The TRSYS01 system employs dedicated sensors and electronics. Their high accuracy and sensitivity ensure that TRSYS01 will still measure under circumstances where competing systems no longer perform reliable measurements; i.e. down to very low heat fluxes and low temperature differences across the wall. The matched thermocouple pairs in TRSYS01, model TC, measure temperature differences with an uncertainty of better than 0.1 °C over the entire rated temperature range. TRSYS01 includes 2 x HFP01heat flux plates. HFP01 is the world’s most popular sensor for heat flux measurement in studies of buildings.
Robust and Stable
Equipped with heavy-duty components, TRSYS01 has proven to be very robust and stable. It survives repeated installation necessary in this application where measuring systems are typically used at multiple locations.
Suggested Use
- Building U-value and R-value measurement
Areas of Application
Material characterisation / thermal conductivity measurement
Specifications
| Measurand | -heat flux (2 x) -temperature (2 x) -temperature difference (2 x) |
|---|---|
| Required data analysis to determine building R-value and U-value | to be performed by the user according to ISO and ASTM standard practices |
| Standards governing use of measuring system | ISO 9869 and ASTM C1155 / C1046 |
| Number of measurement locations | 2 (can be increased on request) |
| Cable length per location | location 1: 10 m location 2: 20 m |
| Rated operating temperature HFP01 and TC | -30 to +70 °C range |
| Uncertainty of calibration heat flux sensors | ± 3 % (k = 2) |
| Guard width to thickness ratio | 5 m/m (as required by ISO 9869 D.3.1) |
| Acceptance interval temperature difference measurement | ± 0.1 °C (required by ISO 9869, paragraph 5.2) |
| Measurement duration range | > 3 days |
| Data storage capacity | > 30 days |
| Adapter rated power supply | 110-220 VAC, 50 / 60 Hz |
| Temperature difference measurement resolution | 0.02 °C |
| Heat flux measurement resolution | 0.02 W/m² |
| Connection to PC | via USB or RS232 |
| Options | • Rechargeable battery pack for autonomous use • LP02 pyranometer • More measurement locations |
