Carrier NSA-RH-DUCT Manual

Carrier Måling NSA-RH-DUCT

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Side 1/10

Relative Humidity, Duct, Thermistor

Installation and Operation

#NSA-HH/RH2-CP-D-C, NSA-HH/RH3-CP-D-C – 11/14/2019

Specifications subject to change without notice.

Catalog No. 11-808-775-01 Page 1 of 10

Overview

The Carrier Relative Humidity with Thermistor Duct Series utilizes a thermoset polymer

capacitive sensing element with a factory fitted hydrophobic filter to improve its moisture

resistance. The sensing elements multilayer construction also provides excellent

resistance in applications where dust, dirt, oils and common environmental chemicals

are found. The RH duct sensors include on board DIP switches which allow the user to

select the desired output signal and can be powered by AC or DC power sources. Each

unit also contains 0%, 50%, and 100% test options to verify that the transmitter is both

working and wired properly. Field calibration can be performed by using the increment

and decrement calibration DIP switches without the need to replace the sensing

element. These enhancements provide increased flexibility and outstanding long-term

reliability without the need to replace the sensors in the field. Duct configurations feature

a weatherproof Euro style enclosure with a gasketed cover and conformally coated

circuit boards for increased moisture resistance in high humidity environments. The sensor is protected by a stainless-steel

sintered filter.

Applications: Humidification, Dehumidification, Supply / Discharge / Return Air, Economizers, Clean Rooms, Data

Centers, Process Control, Schools, Hospitals, Office Buildings

Part Numbers

NSA-HH/RH2-CP-D-C NSA-HH/RH3-CP-D-C

Specifications

RH Supply Voltage

(Reverse Polarity Protected):

4-20 mA: 250 Ohm Load: 15 - 40 VDC / 18 - 28 VAC

500 Ohm Load: 18 - 40 VDC / 18 - 28 VAC

0-5 VDC: 12 - 40 VDC / 18 - 28 VAC | 0-10 VDC: 18 - 40 VDC / 18 - 28 VAC

RH Supply Current (VA):

Voltage Output: 8 mA max (0.32 VA) | Current Output: 24 mA max (0.83 VA)

RH Output Load Resistance:

4-20 mA: 700 Ohms max | 0-5 VDC or 0-10 VDC: 4K Ohms min

RH Output Signal:

2-wire: 4 - 20 mA (Factory Default)

3-wire: 0-5 or 0-10 VDC and 4 - 20 mA (Field Selectable)

RH Accuracy @ 77°F (25°C):

+/- 1% over 20% RH Range between 20 to 90%

+/- 2%, 3%, or 5% from 10 to 95%

RH Measurement Range

0-100%

Operating RH Range:

0 to 95% RH, non-condensing (Conformally Coated PCB’s)

Operating Temperature Range:

-40 to 140°F (-40 to 60°C)

Storage Temperature Range:

-40 to 149°F (-40 to 65°C)

RH Stability | Repeatability | Sensitivity:

Less than 2% drift / 5 years | 0.5% RH | 0.1% RH

RH Response Time (T63):

20 Seconds Typical

RH Sensor Type:

Capacitive with Hydrophobic Filter

RH Transmitter Stabilization Time:

30 Minutes (Recommended time before doing accuracy verification)

RH Connections | Wire Size:

Screw Terminal Blocks (Polarity Sensitive) | 16 (1.31 mm²) to 26 AWG (0.129 mm²)

RH Terminal Block Torque Rating:

4.43 to 5.31 lb-in (0.5 to 0.6 Nm)

RH NIST Test Points:

Default Test Points: 3 Points (20%, 50% & 80%) or 5 Points (20%, 35%, 50%,

65% & 80%)

1% NIST Test Points: 5 Points within selected 20% Range (ie. 30%-50% are 30,

35, 40, 45 & 50)

Nominal Thermistor Resistive Output @

77°F (25°C) | (Lead Wire Colors) Non-Linear

NTC (Negative Temperature Coefficient):

10KΩ (White/Green)

Thermistor Accuracy 32-158°F (0-70°C):

+/- 0.36°F (0.2°C)

Thermistor Power Dissipation Constant:

3 mW/°C

Produkt Specifikationer

Mærke:	Carrier
Kategori:	Måling
Model:	NSA-RH-DUCT

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