Winland Electronics HA-1 User Manual

Economical Humidity Monitoring

CONTENTS

This package contains:

• 1 HA-1

• 2 Wire nuts

• 2 Lead wires

• 1 Owner’s Manual

SPECIFICATIONS

Power Requirement None

Sensing Range 20-80% R.H. ±10% R.H.

Sensing Element Nylon band

Response Time TC = 12 min.

Output Contact Ratings 1A @ 24VAC/VDC, resistive

Operating Temperature 60 to 90° F (15 to 32° C); non-condensing environment

Indoor use only.

Optimum Operating Temperature 70° F (21.1° C)

Accuracy: ±10% R.H. @ 20-80% R.H., 77° F (25° C)

Weight 8 oz (0.23 kg)

Dimensions 5 x 3.18 x 2.43” (12.7 x 8.1 x 6.2 cm)

Case Material ABS

Mounting Wall, wall box, or duct surface

HA-1

• 1 Rubber mounting gasket (duct mounting only)

• 1 Adhesive mounting template/instructions (duct mounting only)

• 2 Mounting screws (for use with single-gang wall box)

Tech Support 8:00am - 5:00pm Central Time

[phone] • [phone] P

www.winland.com

© 2012 Winland Electronics, Inc.

Z1902 Rev D (08/2012)

GENERAL INFORMATION

The Humid•Alert® humidity sensor provides reliable monitoring of an area where a single high or low humidity limit
is critical. The HA-1 monitors relative humidity from 20% to 80% R.H., activating an internal switch output when
the critical limit is exceeded. This output can be used to activate alarm systems, telephone dialers, or other warning
devices. This is a single set-point device; it can monitor for either a high or a low level, but not both. If additional
monitoring (high and low) is required, Winland’s EnviroAlert® line of products with humidity monitoring accessories
is recommended.

THEORY OF OPERATION

The HA-1 senses the ambient room humidity using a nylon-banded sensing element. The HA-1 requires no power
to operate and provides a SPDT contact output when the single set-point is met. Humidity should be expected to
vary from room to room and from one area of a room to another. Ventilation and airflow will greatly affect relative
humidity. The single set-point is established by using the adjustment knob on the face of the unit.

LOCATION

Choose a location for the Humid•Alert about five feet above the floor on an inside wall with average room
temperature and relative humidity conditions.

NOTE: Temperatures above 90° F (32.2° C) will adversely affect the accuracy of the HA-1.

INSTALLATION

The HA-1 has three mounting options: horizontally positioned single-gang wall box, direct wall mount, and duct
mount.

NOTE: Only use the rubber mounting gasket when mounting the HA-1 to a duct; use in any other application will
limit natural airflow reducing the accuracy of the unit.

To install onto a single-gang wall box:

1) Run low voltage wiring from alarm panel, dialer, etc. to chosen location through the wall into the single-gang
wall box. Plug openings in the sides and back of the box to prevent drafts from affecting the HA-1’s operation.

2) Remove the HA-1 cover by prying with a screwdriver in the notch on the bottom of the case (Figure 1).

3) Mount the base of the unit onto the single gang wall box using the screws provided.

4) Make the wiring connections to the HA-1 assembly using
lead wires and wire nuts supplied (Figure 2). Tuck wires
into the bottom of the base, and then snap the cover
assembly onto base (Figure 2).

Figure 1