Hach 900 MAX manual Analog Inputs Programming, Section

Section 6

There are a total of three analog input channels available on the sampler. These inputs accept 4–20 mA dc or -4.0 to +4.0 V dc analog signals. They can be logged and graphed and can also be used to trigger alarms, cause setpoint samples, and control 4–20 mA outputs.

6.5.2 Analog Inputs Programming

Note: If logging is enabled on any channel, then that channel will have an arrow in front of the channel name to signify the channel

is logged.

Analog input channels can accept a signal from an external device. This signal may range from -4.0 V dc (min) to +4.0 V dc (max) or from 4 to 20 mA dc depending on the input selected. In some cases, input signals from certain devices may also fall somewhere within those ranges. For that reason, each analog input channel must be mapped to the minimum and maximum signal limits of the external device.

To map an external device to an analog input channel:

1.From the Main Menu, select OPTIONS>ADVANCED OPTIONS>DATALOG.

2.Highlight Select Inputs using the UP and DOWN keys and press SELECT.

3.Highlight the analog channel to log using the UP and DOWN keys, then press SELECT.

4.Press CHANGE CHOICE to cycle between Logged and Not Logged, then press ACCEPT.

5.Enter a Logging Interval using the numeric keypad. Press ACCEPT to continue.

6.Select Unit of measurement (ppm, ppb, afd, cfs, cfm, cfd, cms, cmm, cmh, cmd, gps, gpm, gph, lps, lpm, lph, or mgd).

7.Enter Low Point.

8.Enter High Point.

9.Select another channel to configure, or press RETURN to back up one step. Press MAIN MENU to return to the Main Menu display.

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Analog Inputs	8990cm.fm