Alpha Moisture Systems ADHT-E Series Quick Start Manual

Model ADHT-Ex
Intrinsically Safe 4-20mA Dewpoint Transmitter.
Ranges available between -110 °C to +20 °C (-166 °F to +68 °F) dewpoint
The Alpha Moisture Systems Model ADHT-Ex is a 3 wire, 4-20 mA, 24V powered
dewpoint transmitter. The unit is fully self contained in a robust stainless steel
casing with weatherproof protection to IP65, making it ideal for use in heavy
industrial environments.
Designed with the operator in mind, Model ADHT-Ex is extremely easy to use and
the digital dewSMART™ technology ensures accurate and reliable readings with
little or no maintenance.
Fast Response - Stable - Reliable - Accurate -
Easy to Install.
Model ADHT-Ex is certified intrinsically safe to
for use in hazardous areas using a signal isolator PR5104BB2A (recommended) for 100 to
240 VAC (24 VDC to special order). See illustration below.
Various ranges are available covering an overall range from -110 °C to +20 °C dewpoint. The Model
ADHT-Ex derives its power directly from the signal isolator and it is configured to give a linear 4-20 mA
signal for the chosen range.
FEATURES
• 3 Wire, 4-20 mA, 24 V Dewpoint Transmitter
• Intrinsically Safe:
(Ta = – 40 °C to +60 °C)
• Overall Range -110 °C to +20 °C Dewpoint
• Accuracy ± 2 °C Dewpoint (or equivalent)
• Calibrated in °C, °F or ppm(v)
• Polarity Protected Input
The 4-20mA output signal can be transmitted
remotely to either DCS, SCADA system or any other
suitable equipment with an input impedance of less
than 600W.
Model ADHT-Ex is supplied ready for use, with a
certificate of calibration traceable to National
and International Humidity standards, instruction
manual and 2 metres of connecting cable.
II IG Ex ia IIC T6 Ga
© Alpha Moisture Systems Ltd.
II IG Ex ia IIC T6 Ga (Ta = – 40 °C to +60 °C)
• Weatherproof Rating - IP65
• Open / Short Circuit Detection
• Built-in Temperature Compensation
• High Resolution Measurement Circuitry
• Calibration Traceable to National and
International Standards
Hazardous and
Zoned Areas
Transmitter
Safe Control Area
-63.2
Isolator Hygrometer
Display
Up to 1km
1 OF 4