HMP155 specifications - APA501

Vaisala AviMet Pressure Altimeter System System Description

Document code
DOC232783EN
Revision
E
ft:locale
en-US
Product
APA501
Document type
Technical description
HMP155 humidity measurement performance
Property Description/value
Sensor

HUMICAP®R2, 180R and INTERCAP 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
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
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

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.

HMP155 compliance
Property Description/value

EU directives and regulations

EMC Directive (2014/30/EU)

RoHS Directive (2011/65/EU) as amended by 2015/863

Electromagnetic compatibility (EMC)

EN 61326‑1, Electrical equipment for measurement, control and laboratory use - EMC requirements; industrial environment

CISPR 32 / EN 55032, Class B

RoHS

EN IEC 63000:2018

HMP155 mechanical specifications
Property Description/value
Dimensions (H × W) 279 × 40 mm (10.9 × 1.6 in)
Weight 93 g (3.25 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).