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Instructions for the 4-20mA Unit
DO NOT REMOVE FRONT PANEL WITHOUT REVIEWING
INSTRUCTIONS FIRST. DAMAGE TO DISPLAY(S) MAY
RESULT.
Please read entire instruction before proceeding with
installation or operation of the 4-20mA unit.
4-20mA Option
On Board
4-20mA Unit / Unité / Unidad
Net UV Transmittance
Transmittance UV nette
Transmisión neta de los rayos ultravioleta
UV Intensity
Intensité des rayons UV
Intensidad de los rayos ultravioleta
Figure 1
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Summary of Contents for UV Pure Technologies Hallett
- Page 1 Instructions for the 4-20mA Unit DO NOT REMOVE FRONT PANEL WITHOUT REVIEWING INSTRUCTIONS FIRST. DAMAGE TO DISPLAY(S) MAY RESULT. Please read entire instruction before proceeding with installation or operation of the 4-20mA unit. 4-20mA Option On Board 4-20mA Unit / Unité / Unidad Net UV Transmittance Transmittance UV nette Transmisión neta de los rayos ultravioleta...
- Page 2 Factory Calibrated – Both span and offsets are preset for immediate field use. Mounted On Board – The 4-20mA unit is typically installed within the Hallett 30 unit with the display located on the front panel - see Figures 1 & 2. Released on 19/Aug/16 - X800099E Page 2 UV Pure Technologies Inc.
- Page 3 14-26 AWG but usage of a shielded pair is recommended. There is a knockout located on the bottom of the Hallett unit for cable entry. There is also one #8 stud on the inside of the front cover to help secure signal cable.
- Page 4 4-20mA Option For Hallett 30 4-20mA Option On Board Lift Off Front Cover Disconnect Ribbon Cable UV SENSOR ARRAY MAIN CIRCUIT BOARD PATCH CORD SPRING CAGE TERMINALS WITH LEVER UV INTENSITY #8 STUD TO SECURE SIGNAL CABLE NET UV TRANSMITTANCE...
- Page 5 4-20mA Option For Hallett 30 Operation Cross section of UV Chamber Lamp UV Sensor Water UV Sensor Figure 4 Figure 3 UV Intensity The input signal range of Lamp UV sensor is 0-2.5 Vdc. This value represents a measurement of the UV intensity of the lamp. There are typical operating values for a lamp for either a Drinking Water or Waste Water Application - see Chart 1.
- Page 6 4-20mA Option For Hallett 30 Drinking Water Values Waste Water Values Lamp Lamp Sensor displayed mA value Sensor displayed mA value 0.0% 0.0% 0.05 6.3% 0.02 5.0% 12.5% 0.04 10.0% 0.15 18.8% 0.06 15.0% 25.0% 0.08 20.0% 0.25 31.3% 25.0% 37.5%...
- Page 7 4-20mA Option For Hallett 30 Warning and Alarm set points There are two set points for a UV intensity fault on the Hallett unit. The signal must remain below the set point for at least 3-5 seconds before an alert is issued.
- Page 8 Chart 3 The accuracy is ± 5% within the range of 45-98% UV Transmittance. Note, upon power up of the Hallett unit, the output will remain at zero for about 10-11 minutes. Afterwards, the display and transmitted value will be updated.
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Page 9: Spare Parts List
A Water Quality alarm is indicated by the green LED not on, the valve (if supplied) closes, the Hallett unit issues an audible alarm and turns on solid the red LED beside the water graphic. This occurs when the Water UV sensor value drops below the Lamp UV sensor value continuously for 5 minutes. - Page 10 4-20mA Option For Hallett 30 INSTRUCTIONS FOR REMOVING FRONT PANEL Please unplug the unit before starting. You will require a Philips screwdriver. Begin by removing the front cover (with label & lights). This is accomplished by first removing the 2 screws below holding the front cover.
- Page 11 4-20mA Option For Hallett 30 are missed). Place the front cover in its rest position. Ensure the all cables are within boundary of front cover and that the bottom lip of the front cover is engaged onto the housing. Replace the top cover and screw it down.
- Page 12 UV Pure Technologies Inc. 60 Venture Drive, Unit 6 Toronto, Ontario M1B 3S4 www.uvpure.com...
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