Vaisala HMDW60 User Manual download pdf (Page 27)

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Wall-mounted Vaisala HMW90

Series HUMICAP

®

Humidity and

Temperature Transmitters measure

relative humidity and temperature

in indoor HVAC applications, where

high accuracy, stability, and reliable

operation are required.

The flexible HMW90 series offers

a variety of options and features.

Transmitters include a display and a

sliding cover with either an opening

for the display or a solid front. Both

analog and digital output options,

including special scalings and

calculated parameters, are available.

Quick and Easy to Install

HMW90 series transmitters are quick

and easy to install. The wiring is

connected through the back plate

and the electronics with the sensors

can be snapped on easily after the

wiring is complete. The transmitter is

configured using dip switches, which

are accessible when the enclosure

is open.

Digital Communication

Brings Benefits

The introduction of digital (BACnet/

Modbus) communication to field level

devices brings many advantages. For

example, all sensors can be centrally

accessed and their performance

can be easily monitored. Wiring is

simple when multiple sensors are

installed on the same bus. Sensors

can be set up using standardized

tools, and the system can be enlarged

with additional sensors quickly and

conveniently. In addition, parameters

influencing measurements, such as

pressure or site elevation, can be

centrally set and updated.

Choose from a Wide

Variety of Calibration

Options

On-site calibration and adjustment is

exceptionally easy. The sliding cover

exposes offset trimmers for one-

point calibration without disturbing

measurement. The display instantly

indicates the effects of changes,

The HMW90 Series Humidity and Temperature Transmitters are designed for

demanding HVAC applications.

making it clear and convenient to make

adjustments. A service port enables

two-point calibration, using either a

PC or the Vaisala HUMICAP

®

Hand-

Held Humidity and Temperature Meter

HM70. HMW90 series transmitters

include a user-exchangeable

measurement module, which can be

ordered as a spare part. Calibration

services are available through all

Vaisala Service Centers.

HMW90 Series Humidity and Temperature

Transmitters for High Performance HVAC Applications

Features/Benefits

▪

Both analog and digital output

▪

Easy installation, configuration,

and field adjustment

▪

Humidity parameter options:

relative humidity, dew point,

mixing ratio, enthalpy, wet

bulb temperature, dew point

depression, and absolute

humidity

▪

Full 0 … 100%RH measurement

range

▪

Up to ±1.7%RH accuracy

▪

User exchangeable humidity

and temperature module

▪

NIST traceable calibration

(certificate included)

▪

Available in four colors

BACnet in Brief

▪

A data communication protocol

for Building Automation and

Control networks

▪

Used in management,

automation and field level

communication

▪

ANSI/ISO/ASHRAE standard

controlled by a standardization

body

▪

Adds flexibility by allowing

the integration of products

and systems from different

manufacturers

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