Use the
ASEL
command to select the quantities and scaling for analog outputs of HMP155.
| You can select optional quantities only if
you selected them when you placed your order. |
Quantities and their abbreviations are
listed in the following tables.
Table 1. Quantities measured by HMP155
| Quantity |
Abbreviation |
Metric unit |
Imperial unit |
| Relative humidity |
RH |
%RH |
%RH |
| Temperature |
T |
°C |
°F |
| Additional T‑probe temperature |
Ta |
°C |
°F |
Table 2. Quantities calculated from measured
quantities
| Quantity |
Abbreviation |
Metric unit |
Imperial unit |
| Dew point / Frost point temperature (Td/f) |
TDF |
°C |
°F |
| Dew point temperature (Td) |
TD |
°C |
°F |
| Mixing ratio (x) |
X |
g/kg |
gr/lb |
| Wet bulb temperature (Tw) |
TW |
°C |
°F |
ASEL [CH1 CH2] [low1 high1 low2 high2]
| Parameter |
Description |
| CH1 |
Quantity of channel 1 |
| CH2 |
Quantity of channel 2 |
| low1 |
Low limit of channel 1 |
| high1 |
High limit of channel 1 |
| low2 |
Low limit of channel 2 |
| high2 |
High limit of channel 2 |
Example
To set the scaling of the outputs without
changing the quantities, type the command without parameters. HMP155 prompts for the limits.
Note that ch0 is channel 1 and ch1 is channel
2.
>asel
Ch0 T lo : -40.00 'C ?
Ch0 T hi : 60.00 'C ?
Ch1 RH lo : 0.00 %RH ?
Ch1 RH hi : 100.00 %RH ?
Example
To set the output quantities of the
channels, type the quantities as parameters. The probe prompts for the limits. Always
specify the quantities for both channels.
>asel t td
Ch0 T lo : -40.00 'C ?
Ch0 T hi : 60.00 'C ?
Ch1 Td lo : -60.00 'C ?
Ch1 Td hi : 40.00 'C ?
Example
To set the quantities and scaling with a
single command, type the quantities and limits as parameters according to the command
syntax.
>asel rh td 0 100 -60 60
Ch0 RH lo : 0.00 %RH
Ch0 RH hi : 100.00 %RH
Ch1 Td lo : -60.00 'C
Ch1 Td hi : 60.00 'C