Vaisala HUMICAP HMM170 - Product Overview; Introduction to HMM170; Basic Features and Options

2. Product overview
2.1 Introduction to HMM170
Vaisala HUMICAPâ Humidity and Temperature Module HMM170 is an open frame OEM module
for integration into demanding environmental chambers and harsh conditions. The module
provides a digital RS-485/Modbus RTU output and three freely configurable analog output
channels. The module provides relative humidity, temperature, dew point, and other calculated
parameters.
HMM170 probe covers the full temperature range −70 … +180 °C (−94 … +356 °F) used in
climate chambers and the whole humidity range up to condensation. The small probe and
compact component board oer easy and flexible installation. The probe cable options (2, 5,
or 10 m (6.5, 16.4, or 32.8 ft)) oer excellent cost optimization and flexibility to any OEM
application. By ordering HMM170 with the appropriate sensor, you can use the module in
environments that are frequently sterilized with vaporized hydrogen peroxide (H
2
O
2
) or to
measure humidity in oil medium, for example, for transformer and engine monitoring
applications.
The latest general purpose HUMICAPâ R2 sensor has improved corrosion resistance. The
sensor can tolerate typical chemicals, such as cleaning agents used in climate chambers. The
automatic sensor chemical purge function keeps the sensor clean from typical chemical fumes
and the additional probe warming function prevents condensation. In case HMM170 gets in
contact with water, the automatic heating rapidly dries the sensor to enable fast and accurate
humidity measurement.
HMM170 is easy to install and convenient to use. It provides both digital and analog outputs for
multiple needs. An integrated service port enables a quick and simple way to configure, check,
and calibrate the module with the help of a USB cable and Vaisala Insight PC software. In
addition, the footprint of the HMM170 component board enables easy update for Vaisala
HMM100 users.
2.2
Basic features and options
• Three humidity sensor types:
• Vaisala HUMICAPâ R2C (general use)
• Vaisala HUMICAPâ 180VC (for H
2
O
2
use)
• Vaisala HUMICAPâ 180L2 (for moisture in oil)
• Sensor purge provides superior chemical resistance
• Probe and sensor warming functions minimize condensation on probe
• Analog output options:
• 0/4 ... 20 mA
• 0/1 ... 5 V
• 0 ... 5/10 V
• Probe cable lengths:
• 2, 5, or 10 m (6.5, 16.4, or 32.8 ft)
• Various filter types
Chapter 2 – Product overview
7