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How to use Reed SD-1128 Light Intensity Meter
Function selection: With this Reed SD-1128 Light meter, you can choose from 2 measuring functions: Light Meter or Type K/J Thermometer. With the meter powered-on, press and hold the Function Button. The display will flash “LIgHt”, for Light measurement, and “tP” for Type K/J Thermometer measurement. Release the Function Button to choose the displayed function.
Light Measurement: Always plug the Probe into the Probe Input Socket when the SD-1128 is off. Now, power on the meter by pressing the Power Button and Select the “ LIGHT “ function. Hold the Probe Handle and face the Probe Head against the measuring light source. The Display will show the light measurement value.
Zero Adjustment: To test if the instrument shows the measurements value correctly, while taking a Light Measurement, completely cover the light sensor. If the Display does not show value of zero, press and hold the Logger Button until the Display shows a zero value.
Type K/J Thermometer measurement: Select the “tP” function firstly and plug the optional Type K or J Thermocouple Probe into the Type K/J Probe Input Socket. The screen will display a “K”, meaning it is configured for a Type K thermometer probe. The measured temperature will now be displayed on the display screen.
Data Record (Max., Min. reading): With this SD-2228 you can record the maximum and minimum readings of any light measurements thanks to its data record function. Press the REC Button once to start the Data Record function and a “REC” symbol will appear on the display. With the “REC” symbol on the display.Press the REC Button once, and a ”REC. MAX.” symbol along with the maximum value will appear on the display. To delete the maximum value, press the Hold Button once and the display will show a “REC.” symbol only and execute the memory function continuously.Press the REC Button again, and a “REC. MIN.” symbol along with the minimum value will appear on the display. To delete the minimum value, press the Hold Button once, and the display will show a “REC.” symbol only and execute the memory function continuously.
REED SD-1128 Specifications
| Measuring Range | 2,000, 20,000, 100,000 lux 200, 2,000, 10,000 Ft-cd |
| Resolution | 1, 10, 100 lux 0.1, 1, 10 Ft-cd |
| Accuracy | ±(4% + 2 dgt) |
| Type K Temp. Range | -100.0 to 1300°C (-148.0 to 2372.0°F) |
| Resolution | 0.1°C (0.1°F) |
| Accuracy | ±(0.4% + 0.5°C (1.0°F)) |
| Type J Temp. Range | -100.0 to 1200°C (-148.0 to 2192.0°F) |
| Resolution | 0.1°C (0.1°F) |
| Accuracy | ±(0.4% + 0.5°C (1.0°F)) |
| Auto Sampling Time | 1, 2, 5, 10, 30, 60, 120, 300, 600, 1800, 3600 seconds |
| Data Output | USB/RS232 PC computer interface |
| AC Output | 0.5 Vrms corresponding to each range step |
| Output Impedance | 600Ω |
| Power Supply | 6 x 1.5V UM3/AA batteries |
| Dimensions | 117 x 68 x 45mm |
| Weight | 489g |
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