Vaisala Calibration of Digital Transmitters with HMI41 Bedienungsanleitung PDF herunterladen (Seite 9)

Chapter 2 __________________________________________________________ Product Overview

VAISALA ________________________________________________________________________ 7

CHAPTER 2

PRODUCT OVERVIEW

This chapter introduces the features, advantages, and the product

nomenclature.

Introduction

HMI41 with Calibration Option

Vaisala HUMICAP

Humidity Indicator HMI41 can be used as a field

calibrator for various Vaisala humidity transmitters. There are four

different calibration cables available:

- 19116ZZ for the calibration of HMD/W60/70 and HMP140 series

analogue transmitters

- 19164ZZ for the calibration of HMP230 series digital

transmitters

- 19165ZZ for the calibration of the HMD/W20/30 and HMP130

series analogue transmitters

- 25917ZZ for the calibration of HMT100/HMT330 series digital

transmitters

Note that HMI41 has to meet the same requirements as the transmitter

to be calibrated. There are three calibration modes available: offset

(dry point), gain (wet point) and two-point calibration. All of these

can be performed using HMI41 either as a reference meter (for

example when the transmitter is mounted in an air-conditioning

channel) or only as a terminal for visualizing and setting the

transmitter's RH reading (for example when the transmitter does not

have a local keypad and it is calibrated against salt solutions without a

personal computer).

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Vaisala Calibration of Digital Transmitters with HMI41 Bedienungsanleitung Seite 9