The HF5 series offers the following user functions:
•Interchangeable, plug-in HygroClip2 Advanced probe (sold separately)
•Probe separation: up to 5 m / 16.4 ft (100 m / 330 ft with a digital signal booster)
•Relative humidity, temperature, dew point or other psychrometric parameter
•0...100%RH and -100 to 200°C (-148 to 392°F) - depending on probe model
•Accuracy: ± 0.8%RH and 0.1ºC / 0.2ºF
•Analog outputs only, analog and digital outputs combined or digital outputs only
•User configurable settings
•Calculation of psychrometric parameters such as the dew or frost point
•Humidity temperature calibration and adjustment 1)
1) Except model HF52 (2-wire circuit type)
The ability for the user to easily update both the HF5 and HygroClip2 Advanced probe firmware means that instruments of the HF5 series can be kept up-to-date regarding any future functionality improvement.
If the instructions in the manuals are not followed, the security of the equipment cannot be guaranteed.
Safety
It is important to comply with the manufacturer its instructions. If these instructions are not complied with, the safety characteristics of the HF5-device can be influenced.
Power supply options
Depending on the circuit type, the HF5 requires the following power supply:
HF52 |
2-wire loop powered, analog outputs |
10…28 VDC - depending on the load connected to the output(s). The minimum supply voltage can be determined as follows:
V min = 10 V + (0.02 x Load*) *Load resistance in Ω.
For the maximum load of 500 Ω, the minimum supply voltage is 10 + (0.02 x 500) = 20 VDC. With both output circuits closed, the maximum current consumption is 40 mA. |
HF53, HF54, HF56 |
3 and 4-wire, analog outputs optionally combined with a digital output |
•HF532/535: 18…40 VDC / 13…28 VAC •HF542: 9…36 VDC / 7…24 VAC, galvanic isolation of the analog outputs and power supply •HF562: 100…240 VAC, galvanic isolation of the analog outputs and power supply
HF53 and HF54: with both output circuits closed, the typical current consumption is 100 mA. HF56: typical current consumption <50 mA at 100 VAC and <35 mA at 240 VAC
Please verify the product identification label to determine which power supply option is installed on your transmitter. |
Measured parameters
A HygroClip2 Advanced from Rotronic has to be used with the HF5 transmitter.
The HygroClip2 Advanced probe together with the HF5 transmitter measures relative humidity with a ROTRONIC Hygromer® HT-1 capacitive sensor and temperature with a Pt100 RTD.
Calculated parameters
Using the ROTRONIC HW5 or HygroSoft software, the HF5 can be configured by the user to calculate one of the following parameters:
•Dew point (Dp) above and below freezing
•Frost point (Fp) below freezing and dew point above freezing
•Wet bulb temperature (Tw)
•Enthalpy (H)
•Vapor concentration (Dv)
•Specific humidity (Q)
•Mixing ratio by weight (R)
•Vapor concentration at saturation (Dvs)
•Vapor partial pressure (E)
•Vapor saturation pressure (Ew)
Note:
Some of the above parameters depend on the value of the barometric pressure. Using the ROTRONIC HW5 or HygroSoft software, a fixed barometric pressure value can be specified.
Analog output signals
Parameter:
With the ROTRONIC HW5 or HygroSoft software any of the two analog output signals can be made to correspond to one of the following:
• Relative humidity
• Temperature
• Calculated parameter
Any output can also be disabled.
Output Scale:
The scale of each analog output can be set within the numerical limits of -999.99 and 9999.99. The D/A converters used to generate the analog output signals feature a 16-bit resolution.
Signal Type:
Both analog outputs provide the same type of signal. With the exception of the HF52 (always 4…20 mA), the type of signal can be selected with the ROTRONIC HW5 or HygroSoft software to any of the following:
Current output: 0…20 mA, 4…20 mA.
Voltage output: 0…1V, 0…5V or 0…10V.
Digital interface
Models with a digital output can simultaneously transmit 3 parameters: relative humidity, temperature and calculated parameter.
RS-485 serial interface
Some models of the HF5 are equipped with a RS-485 serial interface. This can be used to connect together up to 64 devices in a multi-dropped arrangement. In principle RS-485 multi-drop network is limited to 64 devices. The HF5 can be used either as a slave or a master, without special configuration. The master is automatically the device that is directly connected to a PC by means of a USB port or Ethernet (TCP/IP) port. RS-485 Compatibility: The communication protocol used by the HF5 and other AirChip3000 products is not compatible with the protocol used by the previous generation of ROTRONIC instruments. Do not connect legacy products and AirChip3000 products to the same RS-485 multi-drop network.
USB or Ethernet interface
Some models of the HF5 are available with a USB or Ethernet client interface in addition to the RS-485 interface. In this case the protection grade of the HF5 enclosure is no longer IP65 / NEMA 4 rated.
Service connector
The client service connector is a UART digital interface (Universal Asynchronous Receiver Transmitter) with a mini-USB type connector. This allows connecting the HF5 with a service cable to a PC running the
ROTRONIC HW5 or HygroSoft software. See Maintenance for the location of the service connector and for the type of service cable to be used. The service connector is used to configure the HF5 and to update its firmware with the HW5 or HygroSoft software.
Note:
Any digital output (USB, Ethernet and RS-485) offers the same functionality as the service connector.
Probe
The HF5 is compatible with all available models of HygroClip2 Advanced probes.