Carrier NSA-OA-RH Bedienungsanleitung

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RH Outside Air Thermistor

Installation and Operation

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

Specifications subject to change without notice.

Catalog No. 11-808-776-01 Page 1 of 9

Overview

The Carrier Relative Humidity with Thermistor Outside Air Series utilizes a thermoset

polymer capacitive sensing element with factory applied hygroscopic filter to deliver a

proportional analog current or voltage output signal. The hygroscopic filter provides added

resistance to moisture, dust, and other chemicals for greater long term reliability. The RH

Outside Air transmitter features integral DIP switches for field selection of the proper output

signal and supply voltage to meet your applications requirements. Each unit also contains

0%, 50%, and 100% test options to verify that the transmitter is both working and wired

properly. Field calibration also 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. Outside Air

configurations feature a weatherproof Euro style enclosure with gasketed cover and

conformally coated circuit boards for added moisture and chemical resistance.

Applications: Monitor Outdoor Air Humidity, Economizer Control, Psychrometric

calculations such as Enthalpy and Dew point, Wash down Applications

Part Numbers

NSA-HH/RH2-CP-O-C NSA-HH/RH3-CP-O-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 (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 Pts (20%, 50% & 80%) or 5 Pts (20%, 35%, 50%, 65% & 80%)

1% NIST Test Points: 5 Pts within selected 20% Range (ie. 30%-50% are 30, 35, 40,

45 & 50)

Nominal Thermistor Resistive Output @

77°F (25°C) (Lead Wire Colors):

10KΩ- (White/Green)

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

+/- 0.36°F (0.2°C)

Thermistor Power Dissipation Constant:

3 mW/°C

Thermistor Sensor Response Time

(T63):

10 Seconds nominal

Lead Wire Length | Conductor Size:

14” (35.6 cm) | 22 AWG (0.65 mm)

Insulation | Rating:

Etched Teflon (PTFE) Colored Leads | Mil Spec 16878/4 Type E

Enclosure Specifications (Material,

Flammability, Temperature, NEMA/IP

“-EH” Enclosure: ABS Plastic; UL94-V0; -40 to 140°F (-40 to 60°C)

“-4X” Enclosure: Polystyrene Plastic; UL94-V2; -40 to 158°F (-40 to 70°C); NEMA 4X

Produktspezifikationen