User manual VAISALA HMP155

[. . . ] USER'S GUIDE Vaisala HUMICAP® Humidity and Temperature Probe HMP155 M210912EN-B PUBLISHED BY Vaisala Oyj P. O. Box 26 FIN-00421 Helsinki Finland Phone (int. ): +358 9 8949 1 Fax: +358 9 8949 2227 Visit our Internet pages at http://www. vaisala. com/ © Vaisala 2009 No part of this manual may be reproduced in any form or by any means, electronic or mechanical (including photocopying), nor may its contents be communicated to a third party without prior written permission of the copyright holder. 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 Sale. ________________________________________________________________________________ Table of Contents CHAPTER 1 GENERAL INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Use the UNIT serial line command to select metric or non-metric output units. FORM Use the serial line command FORM to change the format or select certain quantities for the output commands SEND and R. FORM [x] where x = Formatter string Formatter string consists of quantities and modifiers. For more information on quantities, see Table 3 and Table 4 on page 11. The modifiers are presented in Table 12 on page 32. VAISALA _______________________________________________________________________ 31 User's Guide ______________________________________________________________________ Table 12 Modifier quantity x. y #t #r #n "" #xxx U5 ADDR ERR STAT FORM Command Modifiers Description Quantity name (for example RH, T or TDF) Length modifier (number of digits and decimal places) Tabulator Carriage-return Line feed String constant Special character with decimal code "xxx" Unit field and length Transmitter address with two characters [00. . . 99] Error flags for P, T, Ta, RH [0000 . . . 1111], 0 = no error Transmitter status in 7 character field, for example: N no heating h probe heating active, power H purge heating active, temperature S purge cooling active, temperature X sensor heating active, temperature Transmitter serial number Time [hh:mm:ss] SNUM TIME Example: >form "Temperature=" 5. 2 t #r#n OK >send Temperature= 24. 23 > >form "Twet=" 6. 3 tw U3 #t "T=" t U3 #r#n OK >send Twet= 11. 290'C T= 24. 231'C > >form 5. 1 rh #t t #t tdf #r#n OK >send 15. 6 24. 2 -3. 1 > FORM / command returns the default output format. You can only give a maximum of 73 characters after the command on the command line. >form / OK >send RH= 23. 8 %RH T= 19. 4 'C > 32 __________________________________________________________________ M210912EN-B Chapter 4 ________________________________________________________________ Operation UNIT [M/N] Use the UNIT command to select metric or non-metric output units. UNIT [M/N] where M= N= Metric units Non-metric units Example: >unit n Units : non metric > Pressure Compensation Setting Use the PRES serial line command to set ambient pressure value for fixed pressure compensation. If the value is changed frequently, use the XPRES serial line command. Its value is cleared to 0. 0 at reset; if it is set to other than 0, it overrides the setting given with the PRES command. NOTE In normal pressure conditions, PRES command is not needed. But if mixing ratio is used in high altitudes, the pressure changes will increase the mixing ratio. Use the serial line and do the following: PRES [a. aaaa] where a. aaaa = Ambient pressure value (bar) VAISALA _______________________________________________________________________ 33 User's Guide ______________________________________________________________________ Example: >pres Pressure > : 1. 013 bar ? XPRES [a. aaaa] where a. aaaa =Ambient pressure value (bar) Example: >xpres Pressure: 0. 000 bar > ? Time To set or display the current time, use the TIME serial line command. TIME [HH MM SS] Example: > time 12 00 00 Time : 12:00:00 > When you set the current time for the probe with the TIME command, the time will be displayed as long as the probe is turned on. At reset or when the probe is turned off, the time will go back to 00:00:00. 34 __________________________________________________________________ M210912EN-B Chapter 4 ________________________________________________________________ Operation Serial Settings SERI [BAUD][PARITY][DATA][STOP] To set the communication settings, use the SERI serial line command. SERI [BAUD][PARITY][DATA][STOP] where baud = parity = data = stop = Bit rate (300, 600, 1200, 2400, 4800, 9600, 19200) Parity (n = none, e = even, o = odd) Data bits (7 or 8) Stop bits (1 or 2) You need to reset the transmitter to activate the new communication settings set with SERI command. The settings can be changed one parameter at a time or all parameters at once. Example: Changing all parameters >seri 9600 e 7 1 Baud P D S : 9600 E 7 1 > Example: Changing baud only >seri 4800 Baud P D S > : 4800 E 7 1 SMODE Use the SMODE command to set the user port to permanent STOP, RUN, POLL or SEND mode. SMODE [xxxx] where xxxx = STOP, RUN, POLL or SEND VAISALA _______________________________________________________________________ 35 User's Guide ______________________________________________________________________ Example: >smode Serial mode > : STOP ?POLL Table 13 Mode STOP RUN POLL Selection of Output Modes Output Only with the SEND command Automatic output Only with the SEND [addr] command Available Commands All (default mode) Only command S Use with RS-485 buses Selected output mode will be activated after power outages. INTV Use the INTV command to set the outputting interval for the RUN mode. INTV [xxx yyy] where xxx = yyy = Output interval (0. . . 255) where 0 is the fastest possible output rate. Unit (s, min or h) Example: >intv 1 min Interval > : 1 min 36 __________________________________________________________________ M210912EN-B Chapter 4 ________________________________________________________________ Operation Data Filtering The commands introduced in this section are used for setting the filtering level, checking the probe configuration, listing available commands and possible error messages, and displaying the software information of the probe. FILT [0. 1. . . 1] Use the FILT [xxx] serial line command to set the filtering level. The output is calculated based on the following formula: [( new result * filt) + ( old result * (1. 0 - filt))]. FILT [xxx] where xxx = 0. 1. . . 1 where 1. 0 = no filter and 0. 1 = about 16 moving average Example: >filt Filter > : 0. 800 ? ? Use the ?command is similar but can also be used if the probe is in POLL mode. VAISALA _______________________________________________________________________ 37 User's Guide ______________________________________________________________________ Example: >? [. . . ] When a channel is specified, only the specified analog output channel is adjusted. ACAL [0/1] Example: Ch 0: >acal 0 U1 ( V ) ?8. 8997 > MI70 Check and Adjustment Vaisala MI70 measurement indicator is an optional accessory that can be used as a display or as a communication device for HMP155. Both the active output version and the passive output version (only RH displayed) can be checked with MI70. In the active output version relative humidity, temperature and additional T-probe temperature can be calibrated. [. . . ]