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Summary of Contents for Vaisala HUMICAP HMI41
- Page 1 USER'S GUIDE Calibration of Digital Transmitters with Vaisala HUMICAP® Humidity Indicator HMI41 Cables 19164ZZ and 25917ZZ M210777EN-B...
- 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
________________________________________________________________________________ Table of Contents CHAPTER 1 GENERAL INFORMATION................3 Safety..................3 Recycling .................. 4 Trademarks ................4 Warranty..................5 CHAPTER 2 PRODUCT OVERVIEW.................. 7 Introduction ................7 HMI41 with Calibration Option ..........7 Selecting HMI41 Calibrator Function ........8 CHAPTER 3 CALIBRATION ..................... - Page 4 User's Guide ______________________________________________________________________ This page intentionally left blank. 2 ________________________________________________________________ M210777EN-B...
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Page 5: Chapter 1 General Information
Chapter 1 ________________________________________________________ General Information CHAPTER 1 GENERAL INFORMATION This chapter provides general notes for the manual and the product. Safety Throughout the manual, important safety considerations are highlighted as follows: Warning alerts you to a serious hazard. If you do not read and follow WARNING instructions very carefully at this point, there is a risk of injury or even death. -
Page 6: Recycling
User's Guide ______________________________________________________________________ Recycling Recycle all applicable material. Dispose of batteries and the unit according to statutory regulations. Do not dispose of with regular household refuse. Trademarks ® HUMICAP is a registered trademark of Vaisala. 4 ________________________________________________________________ M210777EN-B... -
Page 7: Warranty
Products should Vaisala so require, be sent to the works supplied hereunder, which obligations of Vaisala or to such other place as Vaisala may liabilities are hereby expressly cancelled and indicate in writing, freight and insurance waived. Vaisala's liability... - Page 8 User's Guide ______________________________________________________________________ This page intentionally left blank. 6 ___________________________________________________________________ M210777EN-B...
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Page 9: Chapter 2 Product Overview
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... -
Page 10: Selecting Hmi41 Calibrator Function
User's Guide ______________________________________________________________________ Calibration is quick and easy to perform. In calibration, HMI41 measures relative humidity with the reference probe and receives the RH information from the transmitter. HMI41 sends the measured or manually set reading to the transmitter which makes calculations and necessary corrections. - Page 11 19.2 on the HMI41 display) with the HMT100 and HMT330 series. When the baud rate is the same, press ENTER and the following appears: Letters and numbers correspond to the following: even parity data bits stop bits VAISALA ________________________________________________________________________ 9...
- Page 12 User's Guide ______________________________________________________________________ These are also the factory settings of the HMP230 series. If the values on the HMI41 display do not correspond to those of the HMP230 series transmitter, change them with buttons ▲ and ▼ until they are correct, press ENTER and then ON/OFF.
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Page 13: Chapter 3 Calibration
10 minutes to a couple of hours. Getting Started After having selected the desired function (Selecting HMI41 Calibrator Function on page 8) and checked the line settings, turn VAISALA _______________________________________________________________________ 11... - Page 14 User's Guide ______________________________________________________________________ HMI41 off and connect the calibration cable to the EXT connector at the bottom of HMI41 (Figure 1 below). Connect the other end of the cable to the connector X5 in the HMP230 transmitter (Figure 2 on page 13).
- Page 15 Chapter 3 _______________________________________________________________ Calibration 0605-010 Figure 2 Calibration Connector X5 in Series HMP230 Transmitters 0605-011 Figure 3 Service Port in Series HMT100 Transmitters VAISALA _______________________________________________________________________ 13...
- Page 16 User's Guide ______________________________________________________________________ 0605-012 Figure 4 Service Port in Series HMT330 Transmitters After having connected the cable, turn HMI41 on with the ON/OFF button and wait until the following text appears on the display: If you press the HOLD button, you will go on to two-point calibration mode, and if you press the MODE button, you will go on to gain calibration mode.
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Page 17: One-Point Offset And Gain Calibrations
HMI41 reference probe reading. Numbers on the first line indicate the RH measured by the transmitter, and numbers on the second line indicate the RH measured by the reference probe. Let the readings stabilize. VAISALA _______________________________________________________________________ 15... - Page 18 User's Guide ______________________________________________________________________ If you prefer, you can change the display to show the difference in readings. Press HOLD and a text similar to the following appears: Numbers on the first line indicate how much the transmitter reading differs from that of the HMI41 reference probe. Numbers on the second line indicate the RH measured by the reference probe.
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Page 19: Hmi41 As A Terminal
RH of the salt solution) with buttons ▲ and ▼. Press ENTER to conclude the calibration. If the calibration has been successful, the following text appears: The data is now stored in the transmitter memory. If the calibration has not been successful, the following appears: VAISALA _______________________________________________________________________ 17... -
Page 20: Two-Point Calibration
User's Guide ______________________________________________________________________ In this case, perform the calibration again. Whether the calibration was successful or not, HMI41 always returns to show the selected calibration mode: After having successfully completed the calibration, turn HMI41 off and disconnect the cable. Two-Point Calibration In two-point calibration mode, both offset and gain corrections are made. -
Page 21: Hmi41 As A Reference Meter
HMI41. Numbers on the second line indicate the RH measured by the reference probe. You can return to the previous display by pressing HOLD again. Let the readings stabilize. Press ENTER, and the following appears: VAISALA _______________________________________________________________________ 19... - Page 22 User's Guide ______________________________________________________________________ Insert both probes to the higher humidity. Within 1 ... 2 seconds, the display changes automatically to show a text similar to the following: Numbers on the first line indicate the RH measured by the transmitter, and numbers on the second line indicate the RH measured by the reference probe.
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Page 23: Hmi41 As A Terminal
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 probe. VAISALA _______________________________________________________________________ 21... - Page 24 User's Guide ______________________________________________________________________ Let the readings stabilize. Press MODE and a text similar to the following appears: Numbers on the first line are blinking, and numbers on the second line indicate the RH measured by the transmitter. You can now set the blinking reading to the correct value (for example to the equilibrium RH of the salt solution) with buttons ▲...
- Page 25 In this case, perform the calibration again. Whether the calibration was successful or not, HMI41 always returns to show the selected calibration mode: After having successfully completed the calibration, turn HMI41 off and disconnect the cable. VAISALA _______________________________________________________________________ 23...
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Page 27: Chapter 4 Troubleshooting
The calibration cable is of the calibration cable. not correctly Check that the line connected. settings in the HMI41 The line settings of memory correspond to HMI41 and the those of the transmitter do not transmitter. correspond. VAISALA _______________________________________________________________________ 25... - Page 28 User's Guide ______________________________________________________________________ This page intentionally left blank. 26 __________________________________________________________________ M210777EN-B...
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Page 29: Quick Reference To Calibration
1 = indicator 2 = calibrator for HMD/W60/70 ▲ (number up) or and HMP140 series analogue ▼ (number down) transmitters 3 = calibrator for HMP230 or ENTER HMT100/330 transmitters 4 = calibrator for HMD/W20/30 and HMP130 series transmitters VAISALA _______________________________________________________________________ 27... -
Page 30: Offset And Gain Calibrations With Hmi41 As A Reference Meter
User's Guide ______________________________________________________________________ Display: What to Do Press Check that the baud rate corresponds to that of the ▲ (number up) or HMP230 transmitter (4.8 - 4800 ▼ (number down) baud), or HMT100/330 ENTER transmitters (19.2 - 19200 baud). Check that these line settings ▲... -
Page 31: Offset And Gain Calibrations With Hmi41 As A Terminal
: humidity > 65%RH Let the readings stabilize. MODE Set the blinking RH reading to ▲ (number up) or the correct value (e.g. to the ▼ (number down) equilibrium RH of the salt ENTER to conclude solution). VAISALA _______________________________________________________________________ 29... -
Page 32: Two-Point Calibration With Hmi41 As A Reference Meter
User's Guide ______________________________________________________________________ Display: What to Do Press ON/OFF Calibration has been successful. (disconnect the cable) Calibration has not been successful. Perform the calibration again. Two-Point Calibration with HMI41 as a Reference Meter Display: What to Do Press °C°F HMI41 has been turned on. °C°F Pabs set min max... -
Page 33: Two-Point Calibration With Hmi41 As A Terminal
Lo bat Hi Indication of the software version (if the version is 1.02 or more). Indication of the battery voltage. bat Hi ▲ (number up) or ▼ (number down) Select the desired calibration mode. ENTER VAISALA _______________________________________________________________________ 31... - Page 34 User's Guide ______________________________________________________________________ Insert the transmitter probe to the lower humidity. Let the readings stabilize. MODE (number up) or Set the blinking RH reading to the correct (number down) value (e.g. to the equilibrium RH of the ENTER salt solution). Insert the transmitter probe to the higher humidity.
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