Temperature message 1 - WID513

WID513 User Guide
Document code
M211676EN
Revision
G
Language
English
Product
WID513
Document type
User guide

Vaisala standard temperature message 1 can be used to receive temperature and humidity data. Data fields are comma-separated and missing data is identified with solidi (/) characters:

<SOH>HMP155,<id><STX><rh>,<t>,<u2>,<td>,<tdf>,<tw>,<x>,<stat>,<err><ETX>
<chk><CR><LF>
Name Description
<SOH> ASCII character, Start of header #001
HMP155 Fixed characters
, Comma separator
<id> Sensor ID: 2 characters
<STX> ASCII character, Start of text, #002
<rh> Relative humidity
<t> Air temperature
<u2> Temperature unit
<td> Dew point temperature
<tdf> Dew point/Frost point temperature
<tw> Wet bulb temperature
<x> Mixing ratio
<stat> Probe status: 7‑character field
  • N = No heating
  • h = Probe heating active, power
  • H = Purge heating active, temperature
  • S = Purge cooling active, temperature
  • X = Sensor heating active, temperature
<err> Transducer status code, 1 … 4 characters, for example 0000
<ETX> ASCII character, End of text, #003
<chk> Modulus-65536 (CS4) checksum, hexadecimal format
<CR> Carriage return code, ASCII 0Dh
<LF> Line feed code, ASCII 0Ah

You can use the standard HMP155 or the HMP155 with the additional warmed temperature probe, but the output message must be configured at the Vaisala factory.

Example of temperature message 1

<SOH>HMP155,00<STX> 30.31, 22.27,'C, 3.97, 3.97, 12.61, 5.06,N ,0000<ETX>0B7D<CR><LF>

HMP155 FORM command to set temperature message 1

FORM \001 "HMP155," ADDR \002 3.2 RH "," T ",/,/,/,/,/,/,/" \003 CS4 \r \n
The full temperature message 1 definition is too long for the HMP155 FORM command. Currently, the display only uses RH and T from temperature message 1. The other parameters can be replaced with solidi (/) characters.

When polling, the HMP155 ID (ADDR) must be the same as in the display. Vaisala default ID is 10. If HMP155 sends data automatically, you can use 2 asterisks (**) as an ID in the display.