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Related Manuals for Vaisala HUMICAP HMP45A
Summary of Contents for Vaisala HUMICAP HMP45A
- Page 1 USER'S GUIDE Vaisala HUMICAP® Humidity and Temperature Probes HMP45A/D U274EN-1.2...
- Page 2 The contents are subject to change without prior notice. Please observe that this manual does not create any legally binding obligations for Vaisala towards the customer or end user. All legally binding commitments and agreements are included exclusively in the applicable supply contract or Conditions of...
- Page 3 HMP45A and HMP45D U274en-1.2 Operating Manual GENERAL The HMP45A and HMP45D probes are designed for the measurement of relative humidity and temperature. Humidity measurement is based on the capacitive thin film polymer sensor HUMICAP 180. Temperature measurement is based on resistive platinum sensors (Pt 100 and Pt 1000). Both the humidity and temperature sensors are located at the tip of the probe and in standard version protected by a membrane filter.
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Page 4: Calibration And Maintenance
Figure 2 Adjustment trimmers and probe head connection/disconnection In calibration, the HMP45A/D output is normally read from the output cables. The HMP45A probe head can also be checked with Vaisala’s HMI41 indicator (see Figure 2); the probe head can be connected either to the HMH45 handle, or directly to the HMI41 indicator. -
Page 5: Humidity Calibration
HMI41. Humidity calibration For a high-accuracy two-point calibration use a Vaisala HMK15 or HMK13B calibrator and saturated salt solutions as described in the respective manuals. Leave the calibrator, the HMI41 and the probe head in the same space for at least four hours so that their temperatures have time to equalize. -
Page 6: Spare Parts And Accessories
HMP45A and HMP45D Operating Manual U274en-1.2 As the D (dry) and W (wet) adjustments may affect each other, check again the humidity reading at the low end. If necessary, repeat the adjustments in both the low and the high humidity points until the reading is correct. ®... - Page 7 HMP45A and HMP45D U274en-1.2 Operating Manual Temperature HMP45A -39.2...+60 °C Measurement range -40...+60 °C equals 0...1 VDC Output scale Accuracy at 20°C ±0.2 °C Accuracy over the whole measurement range: -0.1 -0.2 -0.3 -0.4 -0.5 °C Temperature sensor Pt 1000 IEC 751 1/3 Class B HMP45D -40...+60 °C Measurement range...
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Page 8: Electromagnetic Compatibility
IEC 801-4 level 4 (HMP45A&D) GUARANTEE Vaisala issues a guarantee for the material and workmanship of this product for one (1) year from the date of delivery. Damage due to exceptional operating conditions, careless handling or misapplication will void the guarantee. - Page 10 *U274EN*...