User guide

E-M-HP22-V2_13
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroPalm HP22-A hand-held indicator:
User Guide
Instruction Manual
Document Type
Page
3 of 16
Document title
© 2010-2012; Rotronic AG E-M-HP22-V2_13
Applicability:
This manual is valid for the HP22 with firmware version 2.x, where 2.x can be 2.0, 2.1 etc. Changes to the last
digit of the version number reflect minor firmware changes that do not affect the manner in which the
instrument should be operated.
1 Overview
The HP22 is a highly accurate hand-held indicator that displays relative humidity, temperature and a
calculated parameter such as the dew or frost point. The HP22 operates with a regular 9V alkaline battery and
is available with a wide assortment of HygroClip 2 humidity-temperature probes to meet almost any
requirement. The HygroClip 2 probes feature well proven, durable sensors. Digital signal processing ensures
consistent product performance and also facilitates the task of field maintenance with features such as
potentiometer free – digital calibration.
.
Depending on the probe model, the HP22 can measure conditions within the range of 0 to 100 %RH and -100
to 200°C (-148 to 392°F). The temperature operating range of the HP22 electronics is limited to -10…60°C.
Based on the ROTRONIC AirChip 3000 digital technology the HP22 indicator and HygroClip 2 probes offer
the following user functions:
• User configurable settings
• Calculation of psychrometric parameters such as the dew or frost point
• HOLD function
• Humidity temperature calibration and adjustment
• Simulator mode
• Automatic humidity sensor test and drift compensation
• Sensor failure mode
• Data recording
The ability for the user to easily update both the HP22 and HygroClip 2 probe firmware means that the
indicator and probes can be kept up-to-date regarding any future functionality improvement.
2 General description
2.1 Power supply
The HP22 operates with a regular 9V alkaline battery
2.2 Measured parameters
The probes used with the HP22 measure relative humidity with a ROTRONIC Hygromer
®
IN1 capacitive
sensor and temperature with a Pt100 RTD.
2.3 Calculated parameters
Using the ROTRONIC HW4 software, the HP22 can be configured by the user to calculate one of the
following parameters:
o Dew point (Dp) above and below freezing
o Frost point (Fp) below freezing and dew point above freezing
o Wet bulb temperature (Tw)
o Enthalpy (H)
o Vapor concentration (Dv)
o Specific humidity (Q)
o Mixing ratio by weight (R)