RH-Combo-Outdoor-Air-Platinum-RTD

Humidité relative de l'air extérieur avec capteur RTD en platine

Surveillance de l'humidité de l'air extérieur
Contrôle de l'économiseur
Calculs psychrométriques tels que l'enthalpie et le point de rosée
Applications de nettoyage à haute pression

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Applications Surveillance environnementale, Mesure et contrôle des fluides
Connexion électrique Borne à vis
Filtre Filtre hydrophobe
Isolation Téflon gravé (PTFE) Fils colorés
Courant, max 8 mA
Type de mesure Humidité ; température
Température de fonctionnement, max 60 °C
Température de fonctionnement, min -40 °C
Détails de la sortie 0-5 VCC : 12 - 40 VCC / 18 - 28 VAC
Humidité relative 10 à 95 %
Type de capteur d'humidité relative Capacitif avec filtre hydrophobe
Répétabilité 0,5 % HR, ± 0,05 °C
Temps de réponse 20 secondes typiques
Sensibilité 0,1 % HR
ID de série RH-Combo-Outdoor-Air-Platinum-RTD
Stabilité Stabilité de l'humidité relative : dérive inférieure à 2 % / 5 ans, stabilité de la sonde Pt100 en platine : +/-0,03 % après 1000 heures à 572°F (300°C)
Température de stockage, max 65 °C
Température de stockage, min -40 °C
Type d'approvisionnement électrique CC
Tension d'alimentation 24 Vcc
Couple de serrage 4,43 à 5,31 lb-pouce (0,5 à 0,6 Nm)
Calibre du fil 26 à 16 AWG

Supported Applications

The ACI Relative Humidity with Platinum RTD Outside Air Series is a transmitter designed for use with electronic controllers in commercial heating and cooling building management systems. The series utilizes a thermoset polymer capacitive sensing element to measure relative humidity, featuring an optional integrated temperature sensor for monitoring space conditions.

Operating Conditions & Performance

The RH measurement range is 0-100%, with an operating environment of 0 to 95% RH non-condensing. Accuracy specifications are +/- 1% over a 20% RH Range between 20 to 90% for the RH1 configuration, and +/- 2% or 3% from 10 to 95% for other configurations at 77°F (25°C). The operating temperature range is -40 to 140 °F (-40 to 60 °C), with a storage temperature range of -40 to 149 °F (-40 to 65 °C).

Performance characteristics include an RH response time (T63) of 20 Seconds Typical and stability of less than 2% drift over 5 years. The series features a capacitive sensor with a hydrophobic filter, conformally coated PCBs for moisture resistance, and integral DIP switches for field selection of output signals.

Configuration Options

The series is offered in two primary enclosure types: the Euro style (-EH) and NEMA 4X (-4X). The -EH enclosure utilizes ABS Plastic with UV Protectant (UL94-V0), while the -4X enclosure uses Polystyrene Plastic (UL94-V2, UL94-VO depending on source context; data sheet specifies UL94-V2 for NEMA 4X). Both enclosures carry a rating of NEMA 4X (IP 66).

Output signals are field-selectable via DIP switches. The factory default is a 2-wire 4-20 mA output, with options to configure for 3-wire 0-5 VDC or 0-10 VDC outputs. Power supply requirements vary by load and signal type:

4-20 mA: 250 Ω Load requires 15 - 40 VDC / 18 - 28 VAC; 500 Ω Load requires 18 - 40 VDC / 18 - 28 VAC.
0-5 VDC: Requires 12 - 40 VDC / 18 - 28 VAC.
0-10 VDC: Requires 18 - 40 VDC / 18 - 28 VAC.

The series supports Platinum RTD temperature sensors with the following configurations:

RHx-100-xW Series: 100 Ω nominal at 32°F (0°C).
RHx-1K-xW Series: 1 KΩ nominal at 32°F (0°C).

Platinum RTD tolerance is Class A (+/- 0.06%) per DIN EN 60751 (IEC 751), with a temperature coefficient of 3850 ppm/°C. Electrical connections are made via screw terminal blocks accepting wire sizes from 16 AWG (1.31 mm²) to 26 AWG (0.129 mm²). Agency approvals include CE, UKCA, RoHS, and WEEE.

Key Product Differences

Variants differ by accuracy class, sensor resistance value, wire count, enclosure type, and calibration certification:

Accuracy Class: Models are available with RH1 (+/- 1% over a specified range), RH2 (+/- 2%), or RH3 (+/- 3%) designations.
Sensor Element: Platinum RTD options include 100 Ω (Code: 100) and 1 KΩ (Code: 1K).
Wire Configuration: Sensors are offered in Two Wire (2W) or Three Wire (3W) configurations.
Enclosure Style: The "O" suffix denotes the Euro Enclosure, while "O-4X" indicates the NEMA 4X enclosure. Specific variants may also include aluminum housing options indicated by codes such as -BB in model numbers.
NIST Certification: A three-point NIST calibration certificate is available (Code: NIST), providing test points at default levels of 20%, 50%, and 80% RH, or five points within a selected 20% range for the 1% accuracy option.