INSTRUCTION MANUAL Interfacing the OBS-3 Turbidity Monitor with Campbell Scientific Dataloggers 10/05 C o p y r i g h t ( c ) 1 9 9 8 - 2 0 0 5 C a m p b e l l S c i e n t i f i c , I n c .
Disclaimer This manual concerns interfacing another manufacturer’s product with our dataloggers. We will attempt to provide accurate and up-to-date information in this manual. However, changes to another manufacturer’s product are beyond our control. Such changes may affect hookup, programming, and even safe use of the product. Also, this manual should be used in conjunction with the original manufacturer’s technical reference documentation.
OBS-3 Table of Contents PDF viewers note: These page numbers refer to the printed version of this document. Use the Adobe Acrobat® bookmarks tab for links to specific sections. 1. Connections .................................................................1 2. Programming ...............................................................3 2.1 2.2 2.3 2.4 Using Short Cut ........................................................................................3 Using Edlog or the Keyboard/Display..............
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Interfacing the OBS-3 Turbidity Monitor with Campbell Scientific Dataloggers The OBS-3 Turbidity Monitor is a submersible probe manufactured and sold by D & A Instrument Company. This application note provides a diagram of connecting the OBS-3 to a CR1000, CR10(X), CR23X, and CR510 datalogger and describes programming a datalogger to read this probe. The standard output for the OBS-3 is 0 to 5 V, which may be used with the CR23X and CR1000.
Interfacing the OBS-3 Turbidity Monitor with Campbell Scientific Dataloggers Red White Green Jumper Black 12V 1H 1L G CR510, CR500 CR510 & & 21X 21X G FIGURE 2. Wiring Diagram of OBS-3 without Using Switched 12 V Red - Load + #7321 RELAY - Control + 12v C1 G Black G White Datalogger 1H Green 1L Jumper G FIGURE 3. Wiring Diagram for Connecting an OBS-3 to an External Relay and a Datalogger NOTE 1. The assignment of channel number (e.g.
Interfacing the OBS-3 Turbidity Monitor with Campbell Scientific Dataloggers 2. Programming Use Short Cut, Edlog, or the keyboard/display to program the datalogger to read the OBS-3 probe. 2.1 Using Short Cut Short Cut is the easiest and typically the preferred method for programming the datalogger. With Short Cut, you choose the OBS-3 probe and your output preferences from a series of menus, then Short Cut creates a custom program and wiring diagram for you. 2.
Interfacing the OBS-3 Turbidity Monitor with Campbell Scientific Dataloggers ;Read millivolt signal 3: Volts (DIFF) (P2) 1: 1 Reps 2: 25 2500 mV 60 Hz Rejection Range ;CR23X is 25 ± 5000 mV 60 Hz Rejection Range 3: 1 DIFF Channel 4: 1 Loc [ Turbidity ] 5: 0.8 Mult ;(2000 FTU)/(2500 mV) CR23X would be 2000/5000 = 0.4 6: 0.
Interfacing the OBS-3 Turbidity Monitor with Campbell Scientific Dataloggers 2.
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