Advanced HVAC Transmitter

Model No.

HF32 2-wires

HF33 3/4-wires

HF34 Hygro- / Thermostat

Integrated sensors

Yes

Humidity sensor

ROTRONIC Hygromer IN-1

Temperature sensor

Pt100 1/3 Class B

Accuracy at 23 +5 ^oC

+2.0 %rh / 0.3 K (+1.0 %rh / 0.2 K Type R)

Resolution AirChip3000

<0.02 %rh / 0.01 K

Long-term stability humidity sensor

<1 %rh / year

Response time 63

<10 s

Measurement range

-4060 ^oC / 0100 %rh

Electronics operating range

-4060 ^oC / 0100 %rh (-1060 ^oC with LCD)

Display (Space version only)
(HF32S: no backlight)

Graphic LCD
Parameters freely configurable

Alarm functions (programmable)

Open or shorted sensor

Output signals

Freely scalable by user
0...1 V, 0...5 V, 0...10 V, 0(4)...20 mA

Change in signal type

HF33 only

Power supply

HF32: 10...28 VDC: 10 V + (0.02 x load)
HF33: 1540 VDC/1228 VAC
HF34: 840 VDC /628 VAC

Power consumption

HF32: max 40 mA, other models < 100 mA

Circuit type

HF32: 2 x 2 wires, HF33: 3/4 wires

Min. / Max. load

V-signal:1 k/V / mA signal: 500

Firmware update

Via service connector, requires HW4 software

Sensor diagnostics (Drift, state)

Programmable. Default :off

Sensor protection

Polyethylene filter

Max. air velocity

20 m/s at probe

Adjustments

Via ROTRONIC accessories
Humidity: multi point; temperature: 2 points

Hygro- /Thermostat

2 Relays, HF34 only

Data logging

Internal, 2000 data point memory

Dewpoint /frostpoint calculation

Yes

PC interface (service connector)

With ROTRONIC interface cable, HW4 compatible

Housing material / weight

ABS / approx. 120g

Cable connections

1 x M16x1.5, on terminals

Standards

CE- compliant, 2007/108/EG

Audit trail, Electronic Records

FDA CFR21 Part 11 and GAMP compliant

IP protection rating & fire protection class

IP65 / Corresponds to UL94-HB