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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 Unit / Unité / Unidad

Intensidad de los rayos ultravioleta

Transmisión neta de los rayos ultravioleta

UV Intensity

Intensité des rayons UV

Transmittance UV nette

Net UV Transmittance

On Board

4-20mA Option

Figure 1

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Summary of Contents for Hallett

Page 1: ...ESULT Please read entire instruction before proceeding with installation or operation of the 4 20mA unit 4 20mA Unit Unité Unidad Intensidad de los rayos ultravioleta Transmisión neta de los rayos ultravioleta UV Intensity Intensité des rayons UV Transmittance UV nette Net UV Transmittance On Board 4 20mA Option Figure 1 ...

Page 2: ... control The device is installed On Board see Figure 1 but used only for Hallett 30s Product Features 1 LCD Display A 2 5 LCD display is a standard feature indicating both input values and transmitted values see Figure 1 2 UV Intensity Output A signal proportional to the UV intensity of the UV lamp is transmitted 3 Net UV Transmittance UVT Output A signal proportional to the Net UV Transmittance o...

Page 3: ...ds on condition of Hallett unit See Note on Net UV Transmittance in Operation Section The display is updated every second however during a cleaning cycle of the Hallett unit the output is held steady See Net UV Transmittance in Operation Section Installation The output connections for the 4 20mA transmitted signals are to be done on the spring cage terminals located the end of the circuit board Se...

Page 4: ...ABLE BOTTOM LIP RESTS AT CHASSIS WHEN MOUNTED PROPERLY UV INTENSITY NET UV TRANSMITTANCE UV SENSOR ARRAY WATER UVT LAMP UV Disconnect Ribbon Cable WATER UVT LAMP UV SPRING CAGE TERMINALS WITH LEVER PATCH CORD 4 20mA CIRCUIT BOARD MAIN CIRCUIT BOARD 4 20mA Option On Board Lift Off Front Cover KNOCKOUT LOCATED HERE Figure 2 ...

Page 5: ...ction of UV Chamber 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 Lamp UV Sensor Water UV Sensor ...

Page 6: ... 0 17 6 0 9 100 20 0 0 36 90 0 18 4 0 95 100 20 0 0 38 95 0 19 2 0 4 100 20 0 0 42 100 20 0 0 44 100 20 0 Drinking Water Values Waste Water Values Chart 1 This value will be displayed on the bottom left hand side of the 4 20mA unit and is updated every second The transmitted value is normalized from 0 100 and it is displayed on the bottom right hand of the 4 20mA unit The 4 20mA signal is directly...

Page 7: ...0 14 Warning Setpoint 0 55 69 15 0 28 70 15 Waste Water Values Drinking Water Values Chart 2 Net UV Transmittance The input signal range of the Water UV sensor is 0 2 5 Vdc This value represents the UV Transmittance UVT of the water the transmission of UV through the quartz sleeve and the combined UV output from the right hand UV lamp and reflector With everything else constant the net signal repr...

Page 8: ...ensor value drops below the Lamp UV sensor value Since the wiper of the cleaning device passes through the field of vision of the Water UV sensor the value will vary up to 0 6Vdc as the wiper turns at 1 rpm within the quartz sleeve Only the maximum value recorded during the wiping cycle is considered in the calculation of the UVT The transmitted value of the UVT is hence frozen and then finally up...

Page 9: ...amp UV sensor value continuously for 5 minutes Since the wiper causes the water sensor signal to fluctuate only a continuously low signal will cause an alarm A continuously low signal represents a drop in UV Transmittance below the 75 threshold for Drinking Water applications and 40 50 threshold for Waste Water applications Spare parts List Item No Part Description Drinking Water Part No Waste Wat...

Page 10: ... and disconnect the ribbon cable from the circuit board by grabbing the end black connector never pull on the green cable itself The front cover can then be moved a few more inches away from the body Figure 4 2 The front cover can now gently hang on the lanyards provided 3 The patch cord can be left in place or disconnected by pinching the clip and pulling end out from the circuit board 4 Proceed ...

Page 11: ...ables are within boundary of front cover and that the bottom lip of the front cover is engaged onto the housing 7 Replace the top cover and screw it down 8 Secure two lower screws on front cover 9 Plug in the unit 10 Ensure that all three LEDs illuminate on the white display pad and the 4 20mA display powers up it is normal for Net UVT to read 0 on startup see page 8 ...

Page 12: ...UV Pure Technologies Inc 60 Venture Drive Unit 6 Toronto Ontario M1B 3S4 www uvpure com ...

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