PC 950 Probe Colorimeter User Manual
The PC 950 probe colorimeter measures the optical transmittance, absorbance, and concentration of liquids. The fiber optic probe allows measurements to be taken directly from containers, and measurements can be made at different wavelengths by changing plug-infilters.
Functions are selected by a front panel keypad, and readings and settings are displayed on an alphanumeric LED display.An RS-232 serial port connection provides data to a remote PC. Two analog output signals drive a strip chart recorder (0.0 V 1.0 V) and/or a 4 mA 20 mA current loop for industrial applications.
Instrument Operation
Before turning on the PC 950, select and install the appropriate filter for the test that will be conducted. Install the fiber optic probe into the lamp and filter holder, making sure the knurled screws are finger-tight to prevent relative motion between fiber optic and the instrument.
ON/OFF
Press the O N key to start. When the PC 950 is first turned on, it displays PC 950 , followed by the firmware revision, and then enters the Transmittance mode and autozeroes itself. It is now ready for operation; when operation is complete, turn the PC 950 off by pressing OFF.
TRANSMITTANCE OPERATION
Transmittance displays the optical transmittance of a measured sample from 0.0 to 100.0. The transmittance display format is T 100.0 . Totake a reading, zero the instrument to 100% T (0.0 A) by placing the instrument probe in a reference liquid (standard) or distilled water (depending on the procedure) and pressing ZERO.The instrument should now read T 100.0 (absorbance value of zero).
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