6520
105
24
24
35
Fits 20mm nom. conduit (3/4")
TWN-LUX
Light Sensor.
Ordering Information.
TWN-LUX Standard Calibration: 0~1000lux Nominal.
Specifications.
Input Adjustable from 1~10lux to 0~1000lux Nominal.
Turn Trimpot fully clockwise = 0~10lux Nominal.
Turn Trimpot fully anticlockwise = 0~1000lux Nominal.
(Note: Trimpot requires 25 turns to go from one end to the other.)
Output -Voltage 0~10Vdc.
Output Impedance = 1kΩ
(Note: With a 12Vdc power supply output may only rise within approx. 95% FSO.)
-Current 4~20mA, 3 wire.
Maximum Load = 300Ω @ 12Vdc.
Maximum Load = 900Ω @ 24Vdc.
Power Supply 12~24Vdc.
Current Draw -Voltage Output 20mA @ 24Vdc P/S with 10Vdc out.
-Current Output 40mA @ 24Vdc P/S with 20mA out.
Operating Temperature 0~70C.
Storage Temperature -20~80C.
Operating Humidity 90%RH Max. Non-Condensing.
Note 1. Specifications based on Standard Calibration Unit, unless otherwise specified.
Note 2. Due to ongoing research and development, designs, specifications, and documentation are subject to change without notification.
No liability will be accepted for errors, omissions or amendments to this specification.
Connection Example. Dimensions.
12~24Vdc
Power Supply.
Eg. Indicator, 2100-M,
etc. With
4~20mA Current Input.
(See Note Beside.)
TWN-LUX
V+ 1
mA 2
Vout 3
COM 4
The Proper Installation & Maintenance of TWN-LUX.
MOUNTING.
(1) Mount in a clean environment away from power control equipment. Be mindful of positioning the light sensor, (mounted at
the end of the enclosure) so that the desired level of illumination reaches the sensor. Do Not mount the sensor in direct light
or sunlight - measure reflected light.
(2) Do not subject to vibration or excess temperature or humidity variations.
WIRING.
(1) All cables should be good quality overall screened INSTRUMENTATION CABLE with the screen earthed at one end only.
(2) Signal cables should be laid a minimum distance of 300mm from any power cables.
(3) For 2 wire current loops Austral Standard Cables B5102ES is recommended. For three wire transmitters, RTD's and
Resistance Probes, Austral Standard Cables B5103ES is recommended.
(4) It is recommended that you do not ground current loops and use power supplies with ungrounded outputs.
(5) Lightning arrestors should be used when there is a danger from this source.
(6) Refer to diagrams for connection information.
COMMISSIONING.
(1) Once all the above conditions have been carried out and the wiring checked apply power to the TWN-LUX and allow five
minutes for it to stabilize.
(2) It is advised to adjust the output of the TWN-LUX to the lux level required using a calibrated lux meter, once the "room" being
measured is complete. This is necessary as every installation has a unique reflective pattern, depending on colours,
windows, positioning of walls, furniture, etc. Turn the Trimpot clockwise to increase the output reading, and anticlockwise
to decrease the output reading.
MAINTENANCE.
(1) Repeat (3) of the commissioning instructions. Do it regularly - at least once every 12 months.
twn-lux.p65
ISSUE 280999
Christchurch Nelson Auckland
Ph: 03 343 0646 Ph: 03 546 6840 Ph: 09 827 1930
Fx: 03 343 0649 Fx: 03 548 8797 Fx: 09 827 1931
Intech
INSTRUMENTS LTD.
LED Sensor
Light Intensity (LUX)
Sensor and 3 Wire
Output Transmitter.
+
-
Eg. Indicator, 2100-M,
etc. With
0~10Vdc Voltage Input.
(See Note Beside.)
+
-
+
-
Note: Only one output (mA or V)
need to be connected.
However both may be used.
TECHNOLOGY
& QUALITY
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1997
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ISO9001
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Description.
The TWN-LUX incorporates a silicon photodiode light sensor, in a hermetical sealed case, especially
designed for high precision linear applications. The sensor has a flat glass window with a built in colour
correction filter, giving an approximation to the spectral response in the human eye. As an aid in
adjustment an LED is mounted next to the sensor, with a gradual turn on at approx. 30% FSO.
1.01-1
132mm
25
25
41
17.5
75
110
Fits 20mm nom. conduit. (3/4")
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