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Almemo Measuring System for Calibrating Climatic Chambers
Climatic chamber calibration system comprising of an Almemo® 710 instrument, one Pt100 Psychrometer and eight Pt100 temperature sensors are used to acquire all relevant measurable variables prevalent in the climatic chamber. The relative atmospheric humidity at the nine points in the climatic chamber is calculated in the ALMEMO® 710 itself. Climatic chambers can thus be calibrated in full and on site quickly and easily. Humidity is calculated in the ALMEMO® 710 on the basis of formulae as per Dr. Sonntag and the enhancement factor as per W. Bögel (correction factor Fw(t,p)) for real mixed gas systems). This substantially widens the measuring range and improves the accuracy of humidity variable calculations.
All values, both measured and calculated, are shown in a clear and easy-to-understand way on the ALMEMO® 710‘s large touch display. The ALMEMO® 710 also operates as a data logger. Measuring series can be saved either to the internal memory (capacity for over 400,000 measured values) or via the ALMEMO® memory connector to an SD card (capacity for several millions of measured values). WinControl can be used to display and document values e.g. as a line graphic – either online those measured values actually being acquired during a measuring operation or offline after a measuring operation those measured values previously saved. It also provides various evaluation and statistical functions
Precision Measuring instrument ALMEMO® 710
10 inputs for any ALMEMO® sensors, atmospheric pressure sensor integrated in the measuring instrument.
| Precision measuring instrument ALMEMO® 710 including USB cable, mains unit, instrument case, and confi guration software ALMEMO® Control | MA710 |
| DAkkS calibration certificate for atm. pressure sensor five points in range 700 to 1100 mbar | KD9213D |
Pt100 Psychrometer
Operative range 0 (not ice) to 90 °C, 10 to 100 % RH
The psychrometer is positioned at the center of the useful volume. From the measured values – dry temperature (t) and wet temperature (tw) – and atmospheric pressure (p) (atmospheric pressure sensor integrated in the ALMEMO® 710) we can calculate the relative humidity (Uw) at the center and the dewpoint (td).
| Pt100 psychrometer FPA836-3 including mains unit, water bottle, one pair of wicks | FPA8363 |
| Programming for digital psychrometer: Dew point td | OA9000PRTD |
| DAkks calibration certifi cate for atmospheric humidity Two climate points at 25°C, 30%RH and 25°C, 75%RH (other points available on request) | KH9146D |
| DAkkS calibration certificate for air pressure sensor, 5 points in the range 700-1100 mb | KD9213D |
| Case for psychrometer and accessories | ZB2490TK2 |
Pt100 temperature sensors
For operation in the climatic chamber stainless steel protective tube with PFA cable. Operative range -100 to +250 °C, Protective class IP68 The eight temperature sensors are positioned at the corners of the cuboid spanning the useful volume. From the eight measured values for temperature (t) and the humidity variables from the psychrometer we can calculate the relative humidity values (Uw) at the corners of the cuboid
| Eight Pt100 temperature sensors, diameter 4mm, for operation in the climatic chamber, IP68, Cable length = 5 meters | 8 x FPA40ST0050S01KL0050 | |
| DAkks calibration certificate for temperature, three points at 0, 50, 100 °C (other points available on request) | ||
| for 1st sensor | 1 x KT9021D | |
| for 2nd to 8th sensor | 7 x KT9021D2 | |
| Multi-point adjustment for eight sensors (in certificate, sensor deviation virtually reduced to zero) | 8 x KA9001DW | |
| Programming for eight Pt100 temperature sensors for calculating humidity using ALMEMO® 710 including labeling of the sensor connector | OA9000PRKS | |
Determination of the influence of radiation
Two temperature sensors with different surfaces to determine the radiation effects on air temperature measurement operations. (different emissivity e.g. stainless steel and PTFE)
| Cover for Pt100 temperature sensor, diameter 4mm, PTFE, large emissivity | ZT9000TS41 |
With an ALMEMO® double sensor, the 2 temperatures can be measured simultaneously (additionally) with the 8 temperatures of the corners.
| Digital Pt100 temperature sensors, diameter 4 mm each, for use in climatic cabinet, IP68, cable length 5 m each, mounted on 1 ALMEMO® D7 double connector | FPD740ST0050S21KL0050 |
| DAkkS calibration certificate for temperature, 3 points at 0 / 50 / 100 °C (other points on request) | |
| for 1st sensor | KT9021D |
| for 2nd sensor | KT9021D2 |
| Multi-point adjustment for 2 probes (with certificate probe deviation towards zero) | 2 x KT9001DW |
Measuring Software WinControl
| WinControl software, for measured value processing and documentation for any number of channels (e.g. arithmetic channels, statistic channels), all options included (except Data server, Web server, and additional modules) | SW5600WC3 |
| Assistant for the calibration of climate cabinets. Automatic, convenient evaluation with protocol generation. (needed: WC3/WC4) | SW5600WCZM13 |
| Additional protocol for direct integration of climate chambers into online measurement |
