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Summary of Contents for Vaisala HMD20
- Page 1 USER'S GUIDE Calibration of Series HMD/W20/30 and HMP130 Transmitters with Vaisala HUMICAP® Indicator HMI41 U220EN11...
- Page 2 The contents are subject to change without prior notice. Please observe that this manual does not create any legally binding obligations for Vaisala towards the customer or end user. All legally binding commitments and agreements are included exclusively in the applicable supply contract or Conditions of...
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Page 3: Table Of Contents
HMI41 Calibration Option 19165ZZ-U220en-1.1 Operating Manual Contents 1. INTRODUCTION ........................1 1.1 HMI41 with calibration option ..................1 1.2 Selecting the HMI41 calibrator function ..............1 2. CALIBRATION ......................... 3 2.1 Getting started ......................3 2.2 Calibration ........................4 APPENDIX 1: QUICK REFERENCE GUIDE 1996-08-29... - Page 4 HMI41 Calibration Option Operating Manual 19165ZZ-U220en-1.1 This page intentionally left blank. 1996-08-29...
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Page 5: Introduction
19165ZZ-U220en-1.1 Operating Manual INTRODUCTION HMI41 with calibration option The HMI41 can be used as a field calibrator for various Vaisala humidity transmitters. There are three different calibration cables available: 19116ZZ for the calibration of Vaisala’s HMD/W 60/70 and HMP140 series analogue transmitters... - Page 6 HMI41 Calibration Option Operating Manual 19165ZZ-U220en-1.1 °C If the basic settings of the HMI41 (display units, automatic power off function, display quantities and pressure) have to be changed, please refer to the HMI41 Operating Manual. Otherwise, press ENTER repeatedly until the following text appears: The number on the first line of the display corresponds to the following HMI41 functions:...
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Page 7: Calibration
HMI41 Calibration Option 19165ZZ-U220en-1.1 Operating Manual CALIBRATION For a successful calibration, it is essential that the probe of the HMI41 and that of the transmitter are at the same temperature, and that the reference probe has been previously calibrated. Always allow enough time for the readings to stabilize. -
Page 8: Calibration
HMI41 Calibration Option Operating Manual 19165ZZ-U220en-1.1 test connector gain offset Figure 2.3 Calibration connector and potentiometers in the HMD 20/30UB/YB transmitters gain offset test connector Figure 2.4 Calibration connector and potentiometers in the HMW 20/30UB/YB transmitters Calibration After having connected the cable, turn the HMI41 on with the ON/OFF button and wait until a text similar to the following appears on the display: Numbers on the first line indicate the RH measured by the transmitter, and numbers on the second line indicate the RH measured by the HMI41 reference... - Page 9 After having completed the calibration, press ON/OFF and disconnect the cable. GUARANTEE Vaisala issues a guarantee for the material and workmanship of this product under normal operating conditions for one (1) year from the date of delivery. Exceptional operating conditions, damage due to careless handling and mis- application will void the guarantee.
- Page 10 HMI41 Calibration Option 19165ZZ-U220en-1.1 Appendix 1 APPENDIX 1: QUICK REFERENCE TO CALIBRATION It is recommended that this quick reference guide is used only as a checking list for those who already know how to operate the HMI41 as a calibrator. For those who take it into use for the first time, the Operating Manual gives useful information that is not included in this quick reference guide.
- Page 11 HMI41 Calibration Option Appendix 1 19165ZZ-U220en-1.1 Calibration After having connected the cable, turn the HMI41 on and follow the instructions of the table below: DISPLAY WHAT TO DO PRESS: °C°F The HMI41 has been turned on. °C°F Pabs setminmax hyst hold Lo batHi Indication of the software version (if the version is 1.02 or more) Indication of the battery voltage.
- Page 14 *U220EN*...
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