Analog Inputs Programming - Hach 900 MAX Instrument Manual

Section 6

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.
Page 94
Analog Inputs
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.
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
2. Highlight Select Inputs using the
3. Highlight the analog channel to log using the
press .
SELECT
4. Press
CHANGE CHOICE
press .
ACCEPT
5. Enter a Logging Interval using the numeric keypad. Press
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
step. Press
MAIN MENU
OPTIONS>ADVANCED OPTIONS>DATALOG.
and keys and press
UP DOWN
and
UP
to cycle between Logged and Not Logged, then
RETURN
to return to the Main Menu display.
.
SELECT
keys, then
DOWN
to
ACCEPT
to back up one
8990cm.fm