Alpha Moisture Systems ADHT-E Series User manual

FEATURES
• 3 Wire, 4-20 mA, 24 V Dewpoint Transmier
• Intrinsically Safe: II IG Ex ia IIC T6 Ga
(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
• Weatherproof Rang - IP65
• Open / Short Circuit Detecon
• Built-in Temperature Compensaon
• High Resoluon Measurement Circuitry
• Calibraon Traceable to Naonal and
Internaonal Standards
Fast Response - Stable - Reliable - Accurate -
Easy to Install.
The Alpha Moisture Systems Model ADHT-Ex is a 3 wire, 4-20 mA, 24V powered
dewpoint transmier. The unit is fully self contained in a robust stainless steel
casing with weatherproof protecon 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
lile or no maintenance.
Model ADHT-Ex is cerfied intrinsically safe to II IG Ex ia IIC T6 Ga (Ta = – 40 °C to +60 °C)
for use in hazardous areas using a signal isolator PR5104BB2A (recommended) for 100 to
240 VAC (24 VDC to special order). See illustraon 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.
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.
Intrinsically Safe 4-20mA Dewpoint Transmitter.
Ran es available between -110 °C to +20 °C (-166 °F to +68 °F) dewpoint
Model ADHT-Ex
1 OF 4
© Alpha Moisture Systems Ltd.
Transmitter
Hazardous and
Zoned Areas Safe ControlArea
Isolator Hygrometer
Display
-63.2
Upto 1km

How to Order - Step 4 of 5
Select a Transmitter Holder
2 OF 4
Alpha Moisture S stems Model ADHT-Ex
Specifications
MODEL ADHT-Ex Dewpoint Transmitter
Sensor
MODEL
ADHT-Ex Aluminium Oxide, Ultra High Capacitance dewSMART™
sensor with IP65 connector.
RANGE
Overall Range -110 °C to +20 °C dewpoint or 0.01 to 23000 ppm.
(Other engineering units available)
ACCURACY
± 2 °C Dewpoint (3 Sigma RSS)
OPERATING TEMPERATURE RANGE
-20 °C to +60 °C
STORAGE TEMPERATURE
-20 °C to +70 °C
TEMPERATURE COEFFICIENT
Temperature compensated for operating range.
RESPONSE TIME
Wet to Dry : -20 °C to -60 °C - less than 60 secs.
Dry to Wet : -110 °C to -20 °C - less than 20 secs
SAMPLE FLOW RANGE
Flow independent but ideally 2 to 5 sl/min
CALIBRATION
Supplied calibrated with traceability to NPL.
(NPL traceability for range -95 °C to +20 °C)
RECOMMENDED RECALIBRATION PERIOD
1 Year
TRANSMITTER TYPE
3 Wire Type Transmitter
OUTPUT SIGNAL
4 to 20 mA Linear suitable for external equipment with a
maximum input impedance of 600 W (@ 24 V) (Dependant on
isolator selection)
MAXIMUM SAFE AREA CABLE LENGTH
1000 m
MAXIMUM HAZARDOUS AREA CABLE LENGTH
200 m Dependant on cable parameters and hazardous area
classification
CABLE TERMINATIONS
IP65 rated connector at the sensor and other end terminated with
bootlace ferrules.
ELECTROMAGNETIC COMPATIBILITY (EMC)
Complies with BS EN 61326-1
INTRINSIC SAFETY CERTIFICATION STANDARDS
EN 60079-0 / EN 60079-11 / EN 60079-26 / BS EN 61326-1.
II IG Ex ia IIC T6 Ga. (Ta = -40 °C to +60 °C)
For full safet description please request the above certificate.
WARRANTY
1 year for faulty workmanship and defective parts.
For more details please see data sheet DS1000.
Model DS1000
How to Order - Step 3 of 5
Order a Display Below
Order Example:- For Transmitter
Holder with 2 x 1/4 fittin s Order
ADSH - 4 - 4
CAB041 + [XX]
How to Order - Step 2 of 5
Select A Longer Cable Below
Your ADHT-Ex Transmitter comes
complete with 2 metres of connectin
cable as standard.
To order a longer length in metres, add
number after this part number.
Example: CAB041-ADHT-10 for 10
metres
Non-Standard off the shelf cables
available in 3, 4, 5, 10, 12, 15, 25m
len ths. For lon er len ths please call.
ADHT-Ex Standard Cable 2 Meters
Length
ADSH + [X] [X]
X = Choose INLET Pipe Fittin
0 = None 1/8” NPT Port
4 = 1/4” - Pipe OD
8 = 1/8” - Pipe OD
6 = 6mm - Pipe OD
X = Choose OUTLET Pipe Fittin
0 = None 1/8” NPT Port
4 = 1/4” - Pipe OD
8 = 1/8” - Pipe OD
6 = 6mm - Pipe OD
• Perfect for connuous online
measurements
• Fast Response
• 22V – 253V AC or DC operation
• Single channel in-line hygrometer
• Panel protecon to IP65 (NEMA4X)
• 2 independent alarms
• User Friendly - Simple Operaon
• Isolated 4-20mA Output
• Digital Indicaon In °C, °F or ppm(v)
Pipe Fings
Comes compete with mounn plate.
Hi h quality 316 Stainless Steel.
Part No. CAB041
Model ADHT-Ex- [X]
How to Order - Step 1 of 5
Select a Range Below
SILVER (SL) -110°C to -20°C (-166°F to -4°F) dewpoint
RED (RD) -80°C to -20°C (-112°F to -4°F) dewpoint
GREY (GY) -80°C to 0°C (-112°F to +32°F) dewpoint
BLUE (BL) -80°C to +20°C (-112°F to +68°F) dewpoint
PURPLE (PL) -110°C to +20°C (-166°F to +32°F) dewpoint
YELLOW (YL) -60°C to 0°C (-76°F to +32°F) dewpoint
GOLD (GD) -50°C to +20°C (-58°F to +32°F) dewpoint
1 to 1000 ppm(v) resolution = 1ppm
0.1 to 100.0 ppm(v) resolution = 0.1ppm
0.01 to 10.00 ppm(v) resolution = 0.01ppm
0.001 to 17.5 /m3 resolution = 0.001g/m3
0.1 to 300.0 lbs/MMSCF resolution = 0.1 lbs/MMSCF
Range
}
resolution
= 0.1°C / °F
© Alpha Moisture Systems Ltd.

Alpha Moisture S stems Model ADHT-Ex
Dimensions
Model ADHT-Ex Dewpoint Transmitter - 4-20mA Loop Powered Transmitter
Model ADHT-Ex Transmitter Holder - Flow Through Sample Cell
Note: The Assembly is shown with 1/4@ OD tube fings. The dimensions across the tube fings will vary for all other size fings.
Model DS1000 Display
Stable, Accurate and Reliable Alarmed Controller/Display
Allow a minimum of 60mm above the sensor body for plug and cable. Weight: 0.83kg Packed weight: 3.5kg
Panel cutout: 92mm x 45mm - Maximum panel thickness: 10mm. Weight: 350g
Weight: 800g Packed Weight: 1Kg
3 OF 4
© Alpha Moisture Systems Ltd.
>>
Alpha Moisture Systems Dewpoint Meter Model DS1000
ºC Dewpoint
>>
-80.00
48mm
130mm behind bezel96mm 11mm
Par No. PR5104BB2A - Single Channel
How to Order - Step 5 of 5
Order an Isolator for the safe area
See Pa e 4 for wirin dia rams
15mm
90mm
65mm
45mm
38mmø
25mm 55mm
46mm 39mm
3
45mm
4 Mounting holes 5.5mmø

1682 ADHT-Ex pd220923-ISS 8
4 OF 4
Alpha Moisture S stems Model ADHT-Ex
Corrosive Gases
The sensor should not be exposed to ammonia (NH3), mercury (Hg), carbon monoxide (CO) or acid
gases, such as chlorine (Cl) and hydrogen chloride (HCl), as they chemically aack the sensor and destroy
it. Strong oxidising agents, such as ozone (O3) should also be prevented from coming into contact with
the sensor. For more informaon please contact us below. Thank you.
Installation
Model ADHT-Ex Dewpoint Transmitter - 4-20mA Loop Powered Transmitter
No e: Samples should be taken from the upper surface of the main line to prevent any risk of condensate reaching the sensor.
Use stainless steel, nickel or copper piping wherever possible. Additional components may be required for specific applications -
Contact your local distributor or Alpha Moisture Systems Ltd for more information.
For more informaon on our ATEX Cerfied Ex product ran e please contact us
on [phone] or Email: [e-mail]
Distributor Information
HAZARDOUS AREA SAFE AREA
Signal Isolator - Single Channel
Model PR5104BB2A
Intrinsically Safe, Model ADHT-EX, Transmitter
(Ex ia IIC T6 Ga. ATEX II 1 G)
Power Supply 100 to 240VAC
(24VDC to special order)
Alarm Relay Connections
(If Fitted)
4/20mA Output
Connections
(If Fitted)
DS-1000 Display Unit
© Alpha Moisture Systems Ltd.
Registered in England and Wales No. 3902302
VAT Registraon No. GB607207563
WEEE Producer Registraon No. WEEE/EA0067TX
CERTIFICATE No. FM35600
BS EN ISO 9001:2015
Alpha Moisture Systems Limited.
Registered O ce: Alpha House,
96 City Road, Bradford, BD8 8ES. UK.
Product specification may be subject to change.
Tel [phone]
Email [e-mail]
Website amsystems.co.uk