MAMAC Systems HU-226 Data Sheet

RoHS

Model HU-226

Technical Information

TI.226-05

HUMIDITY / TEMP SENSOR

For Additional Information See HU-226 Data Sheet

HUMIDITY TRANSDUCER SPECIFICATIONS

Accuracy*: ± 2% / ±3% RH

Range: 0-100% RH

Hysteresis: ± 1%

Supply Voltage: 12-40 VDC

12-35 VAC (VDC output units only)

Compensated Temp Range: -30°F to 130°F (-35°C to 55°C)

Load Impedance: 1.5K ohms max. at 40 VDC (mA output units)

1K ohms min. (VDC output units)

* Includes non-linearilty and non-repeatability

THERMISTOR SENSOR SPECIFICATIONS

Interchangeability: ± 0.2°C

Heat Dissipation: 3.0 mW/°C

R/T Characteristics: Refer to TI.700-11 (See Temperature Sensor section)

Operating Temp Range: -30°F to 130°F (-35°C to 55°C)

ORDERING INFORMATION - HU-226-

ACCURACY

± 2%

± 3%

OUTPUT

mA

(4-20 mA 2-wire)

VDC

(0-5 VDC/0-10 VDC

field selectable)

HU-226

Duct Mount

1

2

3

4

5

7

8

10

12

13

14

15

TEMP SENSOR

100 ohm Platinum RTD

1,000 ohm Nickel RTD
(5,000 PPM)

1,000 ohm Platinum RTD

1,000 ohm Nickel RTD
(6,000 PPM)

1,000 ohm Balco RTD

10,000 ohm NTC Thermistor
(Type III)

10,000 ohm NTC Thermistor
(Carel)

3,000 ohm NTC Thermistor

10,000 ohm NTC Thermistor
(Type II)

5,000 ohm NTC Thermistor

1,035 ohm Silicon PTC

100,000 ohm NTC

Thermistor

PLATINUM RTD SENSOR SPECIFICATIONS

Accuracy: 0.12% at 0°C

Resistance: 100 or 1,000 ohm at 0°C

Standard: DIN 43760

Heat Dissipation: 3.0 mW/°C

R/T Characteristics: Refer to TI.700-11 (See Temperature Sensor section)

Operating Temp Range: -30°F to 130°F (-35°C to 55°C)

GENERAL SPECIFICATIONS

Environmental: 10-90%RH Non-Condensing

Enclosure: 18 Ga C.R. Steel NEMA 4 (IP-65)

Finish: Baked on enamel - PMS2GR88B

Termination: Unpluggable screw terminal block

Wire Size: 12 Ga maximum

Weight: Duct Mount: 1.0 lbs. (.45 kg)

CONFORMANCE & TESTING

RoHS Compliant
EMC Testing: BS EN 55022:1998, BS EN 55024:1998,

EN 61000-3-3, EN 61000-4-2,
EN 61000-4-3, EN 61000-4-4,
EN 61000-4-5, EN 61000-4-6
EN 61000-4-11

Ex: HU-226-2-mA-3 - Humidity/Temp
Sensor, ±2%RH accuracy with 4-20 mA
output and 1,000-ohm Platinum RTD.

For Resistance vs. Temperature Tables,
please refer to TI.700.11

INSTALLATION

Inspection

Requirements

Warning:

Caution:

Inspect the package for damage. If damaged, notify the appropriate
carrier immediately. If undamaged, open the package and inspect
the device for obvious damage. Return damaged products.

• Tools (not provided)

- Digital Volt-ohm Meter (DVM)

- Appropriate screwdriver for mounting screws

- Appropriate drill and drill bit for mounting screws

• Appropriate accessories

• Two #8 self-tapping mounting screws (not provided)

• Training: Installer must be a qualified, experienced technician

• Do not use on oxygen service, in an explosive/hazardous

environment, or with flammable/combustible media.

• Disconnect power supply before installation to prevent

electrical shock and equipment damage.

• Make all connections in accordance with the job wiring diagram

and in accordance with national and local electrical codes. Use
copper conductors only.

• Use electrostatic discharge precautions (e.g., use of wrist straps)

during installation and wiring to prevent equipment damage.

• Avoid locations where severe shock or vibration, excessive

moisture or corrosive fumes are present. NEMA Type 4 housings
are intended for outdoor use primarily to provide a degree of
protection against wind-blown dust, rain, and hose-directed water.

• Do not exceed ratings of the device.

16

10,000 ohm NTC Thermistor
(Eliwell)

20,000 ohm NTC Thermistor

17

2,252 ohm NTC Thermistor

18

1,800 ohm NTC Thermistor

21

Page 2 of 4

RoHS

Model HU-226

Technical Information

TI.226-05

HUMIDITY / TEMP SENSOR

Mounting

Wiring

HU-226 (DUCT) - Refer to Figure 6 for mounting dimensions.

1. Drill 5/8” hole in appropriate location.

2. Mount transducer on a vertical surface with two #8
self-tapping screws (not provided).

3. Pull wires through knockout and make necessary connec­tions (see wiring diagrams).

4. Replace cover and tighten Philips screws.

Use maximum 12 AWG wire for wiring terminals. Refer to
Figures 1, 2, 3, & 4 for wiring information and Figure 5 for dip
switch designations.

mA Output

Wiring HU-226 Units with mA Output

HU-226 Humidity Transducer with mA Output

TYPICAL APPLICATIONS (wiring diagrams)

Figures 1 & 2 illustrate typical wiring diagrams for the HU-226, 4-20 mA,

two-wire humidity transducers.

Figure 1 - Wiring for mA Output Humidity Transducer with External DC
Power Supply

mA Output Transducer Only

Humidity

Temp

Figure 2 - Wiring for mA Output HumidityTransducer where Controller or
Meter has Internal DC Power Supply

+

12-40 VDC Power Supply

+

Controller / Meter / Recorder

Input Signal

+

Common

Shield/Ground

Temp

Input

HU-226 humidity transducers are 4-20 mA output units powered with a
12-40 VDC supply.

The following describes the proper wiring of these humidity and temp sensors
with mA output:

HUMIDITY SENSOR:

1. Remove the terminal block by carefully pulling it off the circuit board.

2. Locate the [+] and [-] terminal markings on the board.

3. Attach the supply voltage to the [+] lead.

4. Connect the 4-20 mA output ([-] terminal) to the controller’s input terminal.

5. Ensure that the power supply common is attached to the common bus of
the controller.

6. Re-insert the terminal block to the circuit board and apply power to the unit.

7. Check for the appropriate output signal using a DVM set on DC milliamps
connected in series with the [-] terminal.

TEMP SENSOR:

1. Remove the terminal block by carefully pulling it off the circuit board.

2. Use shielded 18-22 AWG wire to connect temp sensor as shown in
Figures 1 & 2.

mA Output Transducer Only

Humidity

Temp

Caution: If you are using grounded AC, the hot wire must be on
the [+] terminal. Also, if you are using a controller without built-in
isolation, use an isolation transformer to supply the HU-226
transducer.

Caution: This product contains a half-wave rectifier power
supply and must not be powered off transformers used to power
other devices utilizing non-isolated full-wave rectifier power
supplies.

Caution: When multiple units are powered from the same
transformer, damage will result unless all 24G power leads are
connected to the same power lead on all devices. It is manda­tory that correct phasing be maintained when powering more
than one device from a single transformer.

+

Controller / Meter / Recorder

Input Signal

+

Common

Shield/Ground

Temp

Input