Minimum load requirements for the HF43 with voltage outputs
The following requirements apply to any external device or circuit connected to the HF43 transmitter with voltage outputs:
In the situation where the external device uses an internal pull-up resistor the value of this resistor should meet the requirements shown below. It is also necessary to add a pull-down resistor RL connected to ground in order to be able to read 100% of the range of the HF43 voltage output.
HF42 and HF43 transmitters (analog outputs)
If so desired, use the HygroSoft software to configure the HF4. Complete the mechanical and electrical installation and simply power up the HF4.
Internal menu (optional keypad and display)
Note: Unauthorized access to the menu can be prevented by disabling the “display menu” setting
Main Menu |
Menu Items |
Selections / Information |
Notes |
Device Settings |
Record |
On / Off |
Data recording (max. 2000 values) |
Unit |
°C / °F |
Temperature / dew or frost point |
|
Back Light |
Key Press / On / Off |
Display backlight mode |
|
Device Information |
Version |
Firmware version |
|
Serial Nbr |
Serial number |
||
Address |
RS-485 address |
||
Type |
Device type |
||
Name |
Device name |
User defined |
|
SensorTest |
Humidity sensor status |
Off / Good / SQ-Tuned / Bad |
|
Humidity Adjust |
RefValue |
Humidity reference value |
± 0.1 %RH steps |
<Adjust> |
1-point adjustment only (offset) |
||
Temperature Adjust |
RefValue |
Temperature reference value |
± 0.1 °C steps |
<Adjust> |
1-point adjustment only (offset) |
•Record: both the recording mode (start / stop and the log interval cannot be changed from the menu and are as configured with the ROTRONIC HygroSoft software
Displayed parameters (optional keypad and display)
When the menu is not active, press the ENTER key to change which parameters are shown on the display:
•Relative humidity and temperature
•Dew / frost point and temperature (when the calculated parameter is enabled)