Forward; Introduction; Precautions - Novalynx 225-RHP-2S Series User Manual

NovaLynx Corporation
1

FORWARD

Thank you for purchasing NovaLynx products. NovaLynx has been designing and manufacturing
weather instruments since 1988. NovaLynx represents several well-known brands of quality
manufacturers, including Gill Instruments, RM Young, Kipp & Zonen, and Vaisala. It is our hope that our
products will meet all your monitoring requirements.

2 INTRODUCTION

The 225-RHP-2Sxx Temperature and Relative Humidity Transmitters are highly accurate and easy to
use. The polymer capacitance humidity sensor is not affected by condensation, fog, high humidity, or
contaminants. A membrane filter protects both the humidity sensor and the solid state temperature
sensor.
The sensor can be used indoors for HVAC monitoring purposes. An optional solar radiation shield
(NovaLynx 380-RHRS) protects the sensor from rain and radiated heat when installed outdoors.
The weatherproof enclosure, cord grip cable entry point, and a filter protect the electronics and sensors
from environmental or mechanical damage. The mounting bracket fits 3/4" to 1-1/2" iron pipe.
 The 225-RHP-2S11 has 4-20 mA loop powered outputs.
 The 225-RHP-2S33 requires a power supply and outputs 0-5 volt signals
Cable is not included but may be ordered by the foot.
 Recommended cable: NovaLynx 330-0524 (24 AWG, 5-conductor, shielded, with PVC jacket)

3 PRECAUTIONS

WARNING – Disconnect the supply before installation to prevent electrical shock and equipment
damage. Follow electrical code requirements.
CAUTION –
Use electrostatic discharge precautions (e.g., use of wrist straps) during installation and wiring to
prevent equipment damage.
CAUTION –
Do not exceed ratings of this device, permanent damage not covered by warranty may result. The
4-20 mA models are not designed for AC voltage operation.
225-RHP-2Sxx Page 4 January 2021