Case -- Heavy Duty Nylon Case with perspex front viewing panel, two programming buttons located on the front panel
Case Size -- 124mm wide 170 mm high 95 mm deep Case Drawing
Mounting -- Wall mounted 
Case Weight  0.9kg
Voltages – 230 volts (standard) 110 volts (export only) 24 volts 
LCD Display -- 16 Characters including spaces 
Display Visual Size -- 65mm wide 13 mm high with dots per character 5 x 7
Environmental Class -- Confirms to the operational requirements of both Class B 
(Domestic Outdoor Installations) and Class C (Industrial Installations) 
Temperature Operating Range  0c to 90c 
Accuracy Class -- Complete Unit = Calculating Module & DHAS = Accuracy Class 1
Temperature Sensors – DHAS – Digital High Accuracy Sensors 
Long Distance Sensors ( LD Version) – Perfect data accuracy transferable up to 200metres 
cable lengths manufactured in 50,100,200 metres  LD Sensors 
Sensor Mounting/Fixing –Strap on sensors (standard) - brass pockets into pipe work optional DHAS Sensors
Sensor Accuracy --  Conforms to within the ISOEN 1434 Parts 1 to 6 -  Class 1 requirements 
(Standard Version)
Low Flow Error Compensation – Software compensation to greatly improve accuracy at low flows
Power Consumption – Idle 0.03amps    Operational 0.1amp
High Precision Version --HCM4 DHAS sensors have a software error compensation which provides a 
error compensation of up to factor 10. 
By compensating for the known offset and curvature of the device characteristics. 
This method is successful due to the simple second 
order error curve and the repeatable nature of the output over temperature for band gap – 
based sensors. An accuracy factor of up to 0.02% is possible.
CE Conformity -- Conforms to Low Voltage Directive 73/23/EEC
Conformity – Conforms to both RoHS & WEEE directives
Pulse Output - Open collector --with grab circuit – band width 50ms – 10 pulses per KWh/MWh Pulse Data
Wiring -- 21 way (max)  Terminal block on PCB -- Removal of case cover is required -- 
sealable terminals on completion of wiring Wiring Diagram
CAT Terminal – (Optional ) Calculator Alarm Terminal – despatches voltage alarm at error code points. 
Operational Error Codes CAT Terminal
ERROR 1     No sensors connected or shorted to 5volts
ERROR 2     Data shorted to O volts 
ERROR 3     Data transmission error 
ERROR 4     Only 1 sensor connected
ERROR 5     Not a pair (either 2 hot or two cold connected)
4 - 20 mA Outputs -- Control signal with 2 test points at 4 mA  & 20 mA -- 4 - 20 mA
Programmable for either Active(standard)or passive signals
(0 to 10mA available as an alternative) 
Total no of graduations    800 = Value of each graduation    20 micro amps    Supply Voltage   15 volts     
Maximum Voltage 30 volts. High Refresh Rate 1 Sec