NovaLynx Corporation________________________________________________________________________________
210-421x-A
Page 4
March 2021
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.
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INTRODUCTION
The
210-421x-A Dual Set Point Temperature Alarm
includes an air temperature sensor or a water/soil
temperature sensor. Two independently controlled relays are provided to operate external equipment
such as alarm lights or sirens. The temperature alarm can function as a frost protection controller.
The back-lit LCD display is easily visible through the transparent cover. With the cover removed the
unit is programmed by push-button controls without the need to connect a computer. All set points
and the minimum and maximum temperatures are stored in non-volatile memory. DIP switch settings
select the units (°F or °C) and enable/disable the internal buzzer.
Programmable Features:
Alarm Set Point Temperature threshold for alarm
Channel 1
Select > (greater than) or < (less than) operator and a value (Default < 32° F
or
< 0° C)
Channel 2
Select > (greater than) or < (less than) operator and a value (Default < 28° F
or
< -2° C)
Alarm ON Delay 0-99 seconds before alarm/ relay activation
(Default 5 sec)
Alarm OFF Delay 0-99 seconds before alarm / relay de-activation
(Default 5 sec)
When in alarm mode, a blinking LED indicates which relay(s) are active. Each relay can be connected in
normally open or the normally closed mode.
It is the responsibility of the installer to properly insulate any connections to the relay terminals,
especially if high voltages are present. It is also important to provide an earth grounding wire to
protect the controller from static discharge, whether or not the relays are connected.
