Carrier NSA-OA-RH Manual

Carrier Måling NSA-OA-RH

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RH Outside Air Thermistor
Installation and Operation
#NSA-HH/RH2- -O-C NSA-HH/RH3- -O-C /14/2019 CP , CP –11
Specications subject to change without notice.
Catalog No. - - - Page of 11 808 776 01 1 9
Overview
The Carrier Relative Humidity with Thermistor Outside Air Series utilizes a thermoset
proportional analog current or voltage output signal. The hygroscopic lter 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 exibility and outstanding long-term reliability. Outside Air
congurations 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- -O-C NSA-HH/RH3- -O-C CP CP
Specications
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 0-10 VDC: 12 - 40 VDC / 18 - 28 VAC | : 18 - 40 VDC / 18 - 28 VAC
RH Supply Current (VA):
Voltage Output Current Output: 8 mA max (0.32 VA) | : 24 mA max (0.83 VA)
RH Output Load Resistance:
4-20 mA 0-5 VDC or 0-10 VDC: 700 Ohms max | : 4K Ohms min
RH Output Signal:
2-wire 3-wire: 4 - 20 mA (default) | : 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 veri cation) fi
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 Teon (PTFE) Colored Leads | Mil Spec 16878/4 Type E
Enclosure Specications (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
RH Outside Air Thermistor
Installation and Operation
#NSA-HH/RH2- -O-C NSA-HH/RH3- -O-C /14/2019 CP , CP –11
Specications subject to change without notice.
Catalog No. - - - Page of 11 808 776 01 2 9
Rating):
(IP 66)
Sensing Tube Dimensions (Length x
Diameter):
“ EH” Models-: 3.00” (76.20 mm) x 1.125” (28.75 mm)
“ 4X” Models-: 4.73” (120.14 mm) x 0.845” (21.46mm)
Product Dimensions (L x W x D):
See below Dimensional Drawing
Product Weight:
0.59 lbs. (0.27 kg)
Agency Approvals:
CE, RoHS2, WEEE
Dimensional Drawing
Euro Enclosure [EH]
NEMA 4X Enclosure [4X]
Front View
Right View
Top View
Figure 1
Installation
For optimal readings, follow these tips:
The sensor should be mounted in the middle of the duct where air circulation is well mixed (no stratication), and not
blocked by obstructions. Stratication and obstructions can cause sensing errors. An example is downstream from a
heating or cooling coil.
Duct probe should be placed (3) to (4) duct segments down from any bend or obstructions and away from 90° bends.
Mount the sensor on the top or sides of duct work; mounting on the bottom risks damage due to moisture.

Produkt Specifikationer

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

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