Reference Measurement Technology for Industry - TESTO - #51

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51  On-site test procedure according to DIN EN 14175/ordering suggestion testo 400 Multi-function The thermal anenmometer probe is used for measurements and monitoring of fume cupboards. The probe corresponds to the new DIN EN 14175. The advantages of the new thermal anemometer probe are the optimum flow impact behaviour and the easy handling. testo 400 provides necessary calculation such as mean value and standard deviation. The objective of the on-site test procedure is to test the correct setup of the fume cupboard, and to establish the performance of the fume cupboard under the prevailing conditions (indoor air flow/outgoing air system). For this purpose, the inflow as well as the outflow is measured. For commissioning test (Part 4), the requirements of the measuring instrument are identical to those in the design check (Part 3). – Direction-dependent, however measurement must be possible within ± 20 ° – Time constant (t63) 0.5 s – Accuracy ± (0.02 m/s + 5% of reading) in measuring range 0.2 to 1 m/s – Anemometers must be calibrated For the repetition test (Part 3), the anemometer must show an accuracy of 10% of reading for the inflow velocity test, and ±(0.02 m/s +5% of reading) for the outflow velocity test in the range from 0.3 m/s. The new laboratory fume cupboard probe here fulfils the requirements from Parts 3 and 4. On-site testing of a laboratory fume cupboard with testo 400 Optimum flow impact behaviour of the laboratory fume cupboard probe (0635 1047) Hot wire probe (0635 1041) optimized for duct measurement with direction recognition relative display in % Twist angle in ° Laboratory fume cupboard probe at 0.5 m/s Laboratory fume cupboard probe 0635 1047 Hot wire probe 0635 1041 We recommend: ComSoft 3 - Professional with data management 0554 0830 RS232 cable 0409 0178 Attachable printer (securely attached) including 1 roll of thermal paper and batteries 0554 0570 SoftCase (protects instrument from impact) with carrier strap, magnetic holder and probe holder 0516 0401 SoftCase for attachable printer (protects printer from dirt/impact) 0516 0411 System case (aluminium) for measuring instrument, probes and accessories 0516 0410 Ordering suggestion testo 400, multi-functional measuring instrument, incl. measurement value store up to 500,000 readings, VAC-module (determination of volume flow with error calculation), battery, Li-cell and calibration protocol 0563 4001 Rech. batt. set for instr. (2 rech. 2.4V/1100mAh) 0554 0196 Thermal anemometer probe, Ø 10 mm, w. telescopic handle, measures air flow in lab fume cupboards to DIN EN 14175 0635 1047 Standard ambient air probe up to +70°C 0636 9740 Pressure probe, 2000 hPa, measures absolute pressure, in robust metal housing with impact protection, incl. quick-closing coupling (M8 x 0.5), magnet for fast attachment 0638 1847 Precision pressure probe, 100 Pa, measures differential pressure, in robust metal housing with impact protection, incl. magnet for fast attachment 0638 1347 Cable, 1.5 m long, connects probe with plug-in head to meas. instrument 0430 0143 Comfort level probe for measuring degree of turbulence, with telescopic handle and stand. Fulfills EN 13779 requirements 0628 0009 General indoor air conditions during air tests, including temperature, air pressure, air humidity and pressure difference between indoor air input and indoor air output, must continue to be measured. According to DIN EN 14175-3: 2003, the anemometer must be able to measure indoor air velocity independently of direction. With additional probes testo 400 offers the possibility of measuring the general indoor conditions. testo 400 – Multi-function instrument testo 400 for measuring temperature, humidity, ÄP, flow velocity, absolute pressure – PC interface and ComSoft 3 Advantages of the laboratory exhaust probe – optimum flow impact characteristics – robust probe with protective cap – corresponds to norm DIN EN 14175 DKD calibration certificate/velocity, hot wire anemometer; calibration points 0.1; 0.2; 0.5; 0.8; 1 m/s 0520 0224 ISO calibration certificate velocity, hot wire, vane anemometer; calibration points 0.5; 0.8; 1; 1.5 m/s 0520 0024