Digital Temperature / Humidity Transmitter MH8D46 with Double Analog Output V or mA

Digital Temperature / Humidity Transmitter MH8D46 with Double Analog Output V or mA

Technical Features

Digital Temperature / Humidity Transmitter MH8D46 with Double Analog Output V or mA

• Digital sensor element All key sensor characteristics, settings, and adjustment data are saved in the sensor element itself.
• Plug-in sensor element Spare elements are inexpensive; a replacement can be fitted on site quickly and easily by virtually anyone; it will be fully accurate straight away needing no special adjustment.
• Digital transfer of measured values from the sensor element to the transmitter
• Factory or DAkkS calibration is erformed on the sensor element alone. Fully accurate – irrespective of connecting cable and transmitter
• Four climate variables can be measured: Double analog output for temperature and one humidity variable relative humidity / dewpoint / mixture ratio
• Limit value relays available on request
• The transmitters can be configured via the internal display and the keypad.
• The analog output type (10 V or 20 mA) can be selected (via the keypad); the analog output range can be programmed.
• Display of measured value, channel, units, humidity range, analog start, analog end, and analog type
• The sensor tube can be connected either directly by plugging onto the transmitter itself or via a connecting cable.
• Suitable for conduit mounting or wall mounting

Technical data

Operative range

• Sensor -20 to +80 °C, 5 to 98 % RH
• Electronics -10 to +60 °C, IP65

Humidity sensor

• Measuring range 0 to 100 % RH
• Sensor CMOSens® technology
• Fixed measuring period / output period approx. 3 seconds
• Accuracy ±1.8 % RH in range 20 to 90 % RH ±2.3 % RH in range 10 to < 20 % RH at nominal temperature

• Hysteresis typical ±1 % RH
• Nominal temperature +25 °C
• Sensor operating pressure
• Atmospheric pressure
• Response time T63 typical 8 seconds at +25 °C, 1 m/s (without filter)

Temperature sensor

• Sensor CMOSens® technology
• Fixed measuring period / output period approx. 3 seconds
• Accuracy ±0.3 K at +25 °C ±0.4 K at +10 to +40 °C ±1.3 K at -20 to +80 °C
• Reproducibility typical ±0.1 K
• Response time T63 typical 20 seconds (without filter)

Outputs

• Double analog output
• Digital-to-analog converter (DAC) electr. isol. 0 to 10 V, load >100 kilohms 0 to 20 mA, load <500 ohms
• Output type 0 to 10 V, 0 to 20 / 4 to 20 mA, selectable
• Resolution 16 bit
• Accuracy 0.1 % of final value
• Temperature drift 10 ppm / K Time constant 100 μs
• Connection Cable, via screwless clamp connector, with cable bushing
• Cable diameter 2 to 5 mm Limit value relays available on request

Standard equipment

• Display, internal 2-row LCD 7 segments 4 1/2 and 5 characters 2 digits 16 segments
• Operation, internal 3 keys

Power supply

• DC voltage 9 to 30 VDC
• Current consumption 30 mA + 1.2·IOut
• Connection Cable, via screwless clamp connector, with cable bushing
• Cable diameter 2 to 5 mm

Mechanical design

• Sensor tube Stainless steel, diameter 12 mm Protective cap SK7, metal-mesh filter

Housing

• Die-cast aluminum, closed cover
• Dimensions 100 x 100 x 60 mm (LxWxH)
• Protective class IP65 (with sensor tube or connecting cable plugged in)