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+== **{{id name="_Toc18093"/}}{{id name="_Toc173"/}}{{id name="_Toc26928"/}}TRH/Conversion of wet and dry bulb temperature and humidity** == |
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+ |
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+**TRH** |
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+ |
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+This instruction completes the conversion of dry bulb temperature, wet bulb temperature and corresponding humidity. |
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+ |
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+-[TRH (d1) (s) (d2) (N)] |
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+ |
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+**Content, range and data type** |
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+ |
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+(% class="table-bordered" %) |
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+|**Parameter**|**Content**|**Range**|**Data type**|**Data type (label)** |
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+|(d1)|humidity|0 to 100|Single precision floating point|ANYREAL_32 |
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+|(s)|Dry bulb temperature|-|Single precision floating point|ANYREAL_32 |
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+|(d2)|Wet bulb temperature|-|Single precision floating point|ANYREAL_32 |
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+|(N)|mode|0 to 1|Signed BIN 32 bit|ANY32 |
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+ |
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+**Device used** |
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+ |
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+(% class="table-bordered" %) |
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+|(% rowspan="2" %)**Instruction**|(% rowspan="2" %)**Parameter**|(% colspan="11" %)**Devices**|((( |
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+**Offset** |
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+ |
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+**modification** |
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+)))|((( |
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+**Pulse** |
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+ |
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+**extension** |
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+))) |
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+|**KnX**|**KnY**|**KnM**|**KnS**|**T**|**C**|**D**|**R**|**SD**|**K**|**H**|**[D]**|**XXP** |
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+|(% rowspan="4" %)TRH|Parameter 1| | | | |●|●|●|●|●| | |●| |
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+|Parameter 2| | | | |●|●|●|●|●| | |●| |
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+|Parameter 3| | | | |●|●|●|●|●| | |●| |
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+|Parameter 4|●|●|●|●|●|●|●|●|●|●|●|●| |
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+ |
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+**Features** |
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+ |
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+（N）There are two modes to choose from: |
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+ |
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+Mode 0: Calculate the corresponding humidity by wet bulb temperature and dry bulb temperature. |
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+ |
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+Mode 1: Calculate the corresponding wet bulb temperature by dry bulb temperature and humidity. |
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+ |
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+The conversion process formula is as follows: |
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+ |
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+Assuming that the wet bulb temperature is A, the dry bulb temperature is B, and the corresponding current humidity is C, the three meet the following conditions: |
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+ |
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+(% style="text-align:center" %) |
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+[[image:11_html_f9763504e639b084.gif||class="img-thumbnail"]] |
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+ |
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+(% style="text-align:center" %) |
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+[[image:11_html_9eb43b8fba5e28f3.gif||class="img-thumbnail"]] |
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+ |
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+(% style="text-align:center" %) |
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+[[image:11_html_f8a8e1f6b18e6e61.gif||class="img-thumbnail"]] |
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+ |
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+(% style="text-align:center" %) |
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+[[image:11_html_c128b23414b3cae9.gif||class="img-thumbnail"]] |
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+ |
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+**✎Note:** |
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+ |
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+● The wet bulb temperature is not greater than the dry bulb temperature. When the two are the same, the humidity reaches the maximum 100%. |
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+ |
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+● The unit of dry and wet bulb temperature is (℃). |
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+ |
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+● The general value range of dry bulb is between 0 to 100℃, the command does not judge its range, so pay special attention when using this command. |
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+ |
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+**Error code** |
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+ |
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+(% class="table-bordered" %) |
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+|**Error code**|**Content** |
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+|(% rowspan="4" %)4084H|The value specified in (N) is out of the following range. 0 to 1 |
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+|The value specified in (d1) is out of the following range. 0 to 100 |
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+|A negative value is specified in (s). |
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+|A negative value is specified in (d2). |
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+|4085H|The output result of (d1)(s)(d2)(N) in the read application instruction exceeds the device range |
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+|4086H|The output result of (d1)(d2) in the writing application instruction exceeds the device range |
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+ |
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+Dry and wet bulb humidity comparison table |
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+ |
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+(% style="text-align:center" %) |
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+[[image:11_html_6cf6e76e6b1a3e12.png||class="img-thumbnail"]] |
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+ |
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+**Example** |
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+ |
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+(% style="text-align:center" %) |
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+[[image:11_html_4acab72ee19939e5.png||class="img-thumbnail"]] |
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+ |
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== **CCPID instruction introduction manual** == |
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**Background and purpose** |
