![[image]](gifs/pascoos9152b.gif)
The PASCO OS-9152B Photometer is a battery powered self contained, medium sensitivity instrument. The unit contains a selenium photovoltaic cell, high sensitivity amplifier and meter readout. In addition to six ranges of sensitivity, the instrument features a variable sensitivity control, internal battery check, and external chart recorder output jack.
| Sensitivity | 1 to 300 Lux full scale in 1x and 3x ranges |
|---|---|
| Meter | 5 cm scale length with 0-10, and 0-3 graduations |
| Recorder Output | 1.5 V at 1ma |
Click here to go to the top of this page.
Mechanical Zero - Before turning the instrument on, check that the meter movement is mechanically zeroed. If not, turn the adjustment screw, directly below the meter face, until the needle is exactly over zero.
Battery Check - Turn the Power Switch to the 'Batt. Test' position. The meter needle should read to the right of the 'Replace Batt.' line. If the needle reads to the left of the line replace the battery.Electronic Zero - Place the palm of your hand tightly over the Light Probe Input connector (if the fiber optic probe is not attached to the Photometer) or over the end of the fiber optic probe (if the probe is attached to the Photometer). When all light has been prevented from entering the selenium cell turn the Sensitivity (Lux) Switch to the '1' position and turn the Zero Adjust Knob until the meter needle reads zero.
Click here to go to the top of this page.