HMP155 specifications - APA501 - HMP155

Vaisala AviMet Pressure Altimeter System System Description

Document code
DOC232783EN
Revision
D
Language
English
Product
APA501
Document type
Technical description
Table 1. HMP155 humidity measurement performance
Property Description/value
Sensor

HUMICAP®180R and 180R2 for typical applications

Observation range 0 … 100 %RH
Response time at +20 °C (+68 °F) in still air with sintered Teflon filter

63 %: 20 s

90 %: 60 s

Factory calibration uncertainty at +20 °C (+68 °F)1

±0.6 %RH (0 … 40 %RH)

±1.0 %RH (40 … 95 %RH)

Accuracy (including non-linearity, hysteresis, and repeatability)
At +15 … +25 °C (+59 … +77 °F)

±1 %RH (0 … 90 %RH)

±1.7 %RH (90 … 100 %RH)

At −20 … +40 °C (−4 … +104 °F) ±(1.0 + 0.008 × reading) %RH
At −40 … −20 °C (−40 … −4 °F) ±(1.2 + 0.012 × reading) %RH
At +40 … +60 °C (+104 … +140 °F) ±(1.2 + 0.012 × reading) %RH
At −60 … −40 °C (−76 … −40 °F) ±(1.4 + 0.032 × reading) %RH
Table 2. HMP155 temperature measurement performance
Description Value
Sensor Pt100 RTD element, Class F 0.1 IEC 60751
Observation range −80 … +60 °C (−112 … +140 °F)
Response time for additional temperature probe in 3 m/s (7 mph) air flow

63 %: < 20 s

90 %: < 35 s

Accuracy with RS‑485 output
At −80 … +20 °C (−112 … +68 °F) ±(0.176 - 0.0028 × temperature) °C
At +20 … +60 °C (+68 … +140 °F) ±(0.07 + 0.0025 × temperature) °C
Table 3. HMP155 inputs and outputs
Property Description/value
Operating voltage 7 … 28 V DC
Minimum operating voltage

0 … 1 V output or RS‑485: 7 V

0 … 5 V output, or warmed probe: 12 V

0 … 10 V output, chemical purge, or XHEAT: 16 V

Outputs

Voltage output: 0 … 1 V, 0 … 5 V, 0 … 10 V

RS‑485

Average power consumption (+15 V DC, load 100 kΩ)

RS-485: < 4 mA

With warmed probe: Maximum 150 mA

Settling time at startup

RS-485: 3 s

Table 4. HMP155 operating environment
Property Description/value
Operating temperature for humidity measurement

−80 … +60 °C (−112 … +140 °F)

Storage temperature

−80 … +60 °C (−112 … +140 °F)

Operating humidity

0 … 100 %RH

IP rating

IP66: Dust-tight. Protected from powerful water jets from any direction.

EMC compatibility

EN 61326‑1, industrial environment

CISPR 32 / EN 55032, Class B

Table 5. HMP155 mechanical specifications
Property Description/value
Dimensions (H × W) 279 × 40 mm (10.9 × 1.6 in)
Weight 86 g (3.0 oz)
Materials
Filter

Sintered Teflon or membrane

Housing Polycarbonate (PC)
1 Defined as ±2 standard deviation limits. Small variations possible (see also the calibration certificate).