rotronic HF5A High End HVAC Humidity and Temperature Transmitter Instruction Manual

: June 9, 2024
: ROTRONIC

rotronic HF5A High End HVAC Humidity and Temperature Transmitter

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Analog & Digital transmitter for humidity and temperature Wall Version

Congratulations on your purchase of the new state-of-the-art HygroFlexAdvanced 5-Series transmitter. Please read these short instructions carefu lly before install-ing the device.

GENERAL DESCRIPTION

The HygroFlexAdvanced 5-Series devices are universal transmit-ters for the transmission of humidity and temperature measure-ments. Compatible with all interchangeable HC2A probes. These short instructions are limited to a description of the main fu nctions and installation of the device. The detailed instruction manual can be found on ProcessSensing.com or by scanning the QR code.

DIMENSIONS / CONNECTIONS

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MECHANICAL INSTALLATION

GENERAL RECOMMENDATIONS

Relative humidity is extremely temperature-dependent. In order to measure it precisely, the probe and sensors must be set exactly on the temperature level of the environment to be measured. The installation site can therefore have a significant influence on the performance of the device. Follow the guidelines below to ensure optimum performance:

Select a representative installation site: Install the probe at a point where the humidity, temperature and pressure conditions are representative for the environment to be measured.
Ensure sufficient air movement around the probe: An air flow of at least 1 meter/second accelerates and facilitates adjustment of the probe to changing temperatures.
Avoid:
1. Probe too close to heating elements, cooling coils, cold or hot walls, direct sunlight, etc.
2. Probe too close to steam, injectors, humidifi ers or direct precipitation.
3. Unstable pressure conditions with high air turbulence.
Insert the probes as far as possible into the environment to be measured.
Avoid accumulation of condensation at the contact wires of the sensor. Install the probe so that the tip points down. If that is not possible, install it in a horizontal position.

MOUNTING THE WALL VERSION

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Mount the transmitter so that the probe points down. rotronic-HF5A-High-End-
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Mounting variant 1 (Drilling Plate)
Drill the necessary holes using the additional drill template printed on the packaging. Then insert the plugs delivered with the device and mount the transmitter with the screws.

MOUNTING THE WALL VERSION WITH A STANDARD PROBE

To avoid measurement errors, the probe should be inserted into the environment to be measured. If necessary, use the respective extension cable and mounting flange to install the standard probe:

Mounting flange	Probe diameter	Temperature range
AC5005	15 mm	100 °C

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MOUNTING THE WALL VERSION WITH AN INDUSTRIAL PROBE

To avoid measurement errors, the probe should be inserted into the environment to be measured. If necessary, use the mounting flange to install the industrial probe:

Mounting flange	Probe diameter	Temperature range
AC1305 (AC1303-M)	15 mm	200 °C

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ELECTRICAL INSTALLATIONS

3-OR 4-WIRE SETUP

The new HygroFlex Advanced 5-Series HF5A-3 and HF5A-D can be used as a 3-wire and galvanically isolated 4-wire. With the additional Jumper J1, located on the PCB and indicated in section 4.4, can be chosen over 3-wire or 4-wire.

Default: 3-wire – J1 mounted, to change to 4-wire simply open up the transmitter and remove Jumper J1.

Recommendation Rotronic: 4-wire galvanically separated with unmounted Jumper J1 – with the benefit that the power supply and the outputs are separate galvanically isolated.

SUPPLY VOLTAGE / TECHNOLOGY

V min = 0.024 mA Rload = 0.024 500Ω = 12 V
** ¾-wire Current Outputs: Output current monitoring from 100 Ω load guaranteed

TERMINAL CONFIGURATION / CONNECTION DIAGRAMS

The type is deﬁned using the table Supply Voltage / Technology to then use the following connection diagrams: rotronic-HF5A-High-End-HVAC-Humidity-and-
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PROGRAMMING

The basic settings of the devices are made in the factory. Customer-specific setting can be made via the HW5 soft ware together with an NFC to USB interface. The soft ware HW5 can be downloaded on the internet at: ProcessSensing.com.

The NFC interface is not password protected and can be used with the necessary
NFC-USB-READER and the soft ware HW5. Manipulations can be prevented by means of activation of the write protection function, which can be set in the soft ware HW5.

SCALING / FIRMWARE UPDATE / ADJUSTMENT

The following settings can be made with the help of the HW5 soft ware and an NFC to USB interface:

New scaling of the outputs
Firmware update
Adjustment of a mounted Probe

LED STATUS MODE

The HF5A has a mounted LED on the front of the transmitter to indicate the actual status of the transmitter. Per default the simple LED status mode is activated:

Green = Normal operation
Orange = Simulation mode activated
Red = Alarm (Error)

Further information about the simple and the detailted LED Status Mode can be found in the detailed HF5A manual (or by scanning the QR-Code).

PERIODIC CALIBRATION OF THE PROBE

Both the probe and the corresponding electronics are very stable and do not normally need to be changed or calibrated after factory calibration. The long- term stability of the Rotronic Hygromer humidity probes is typically better than 1 %rh per year. For maximum accuracy we recommend calibration of the probe about every 6 to 12 months.
More frequent calibration can be necessary in applications where the sensor is exposed to pollutants. The calibration can be performed by the user himself on site or in the laboratory / workshop. For routine calibrations the probe should be checked at one or two points.

Technical data (Electronics operating range)

Temperature| Models with display: -10…60 °C / without display: -40…70 °C
Humidity| 0…100 %rh, non-condensing
Technical data (Mechanics)
Housing| Bottom: ABS Top: PMMA
Technical data probe
Depending on probe

DELIVERY PACKAGE