Campbell OBS501, Operator'S Manual

Page: 24 / 66

OBS501 Smart Turbidity Meter with ClearSensor
®
Technology
14
7.3.3 Analog 0 to 5 Volt Wiring
TABLE 7-5. Analog 0-5 Volt Wiring
Color Description
CR6, CR800, CR850,
CR1000, CR3000, CR5000
Blue Shutter Open - Control High
Control Port or
Universal Channel
White
Backscatter (Low) or
Sidescatter (High) Control
Control Port or
Universal Channel
Green Signal
Differential High or
Single-Ended Input
Brown Analog Ground
Differential Low or
Analog Ground
Black Power Ground G
Red Power SW12V
Clear Shield G
The measurement sequence is to raise the blue wire from ground to 5 volts to
open the shutter, delay 6 seconds, and then measure the backscatter analog
output on the green wire. If sidescatter is desired, then raise the white wire
from ground to 5 volts, delay 3 seconds, and then measure the sidescatter
analog output on the green wire. In either case, lower the blue wire to ground
to close the shutter. Note that measurements can be differential or single-
ended. Differential measurements are recommended.
The output is scaled as 1 mV per TU. For example, 100 mV = 100 TU, 4000 mV =
4000 TU.
7.4 Programming
Short Cut is the best source for up-to-date datalogger programming code.
Programming code is needed when:
•
Creating a program for a new datalogger installation
•
Adding sensors to an existing datalogger program
If your data acquisition requirements are simple, you can probably create and
maintain a datalogger program exclusively with
Short Cut . If your data
acquisition needs are more complex, the files that Short Cut creates are a great
source for programming code to start a new program or add to an existing
custom program.
Short Cut cannot edit programs after they are imported and edited
in CRBasic Editor .
A Short Cut tutorial is available in Section 4 , QuickStart
(p. 3)
. If you wish to
import Short Cut code into CRBasic Editor to create or add to a customized
program, follow the procedure in Appendix A , Importing Short Cut Code Into
CRBasic Editor
(p. A-1)
.
NOTE