Novatech MC9200 Series, Technical Reference Manual

Page: 16 / 53

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I) Set ANALOG OUTPUT
Analog outputs are designed for interfacing with recorders, pumps and computers.
!!WARNING!!
controller could
be
damaged and
void
warranty!
Analog outputs are
self powered. Do
not try to
externally loop
power.
Externally powered
outputs will
damage
your controller!
The programmable option is an Isolated Proportional 4-20 mA output,
designed to interface with an analog recorder, metering pump or computer.
The output is 4-20
mA
over a programmable range. For example,
if
the
analog input was pH, the output could be programmed to be 4
mA
at 6.7
pH, the "LO RANGE" set point, and 20 mA at 8.2 pH, the "HI RANGE"
set point".
Analog outputs require calibration upon initial start up. Calibration is re-
commended after changing scales or after factory reinitialization. For
accurate calibration of the analog output, a milliamp meter is required.
Calibration
Note:
LO = 4
mA
HI =20
mA
TIP:
For help with
menu locations,
please refer
to
the
"Menu Map"
supplied with your
controller.
1 . Remo v e signal wires if installed and connect a milliamp meter
to output connections on daughter board . Observe proper polarity (+/-) .
Refer to Diagram 8 , pg . 35 , for connections .
Note:
The Diagram
refle c ts a dual or 2 channel board. Depending on y our controller model ,
there ma y be connections fo r onl y one output.
2 . SCROLL to
CONFIGURE-D/A OUT SELECT
under the
MAIN MENU-CONFIGURE
menu . Pr e ss ENTER.
3 . D/A
OUT
#1
PARAM
will be displayed on the first line . The sec-
ond line w ill display s y stem conductivity , pH , or ORP (depending
on model of y our controller) to be monitored or controlled. If more
than one analog output is present , use the ARROW keys to display
the analog input to be tagged to analog output. Present analog
input is designated by an asterisk (*) . Press ENTER.
4 . Press ENTER and SCROLL DOWN to
LO ADJUST
.
As indi-
cated on the display , us e the ARROW ke y s to calibrate the
" lo "
mA
reading (4
mA
) on th e external milliamp meter . Pr e ss ENTER
to enter the adjustment .
5 . SCROLL DOWN to
HI ADJUST
. A s indicated on the displa y ,
use th e ARROW keys to calibrate th e " hi "
mA
reading (20
mA
) on
the external milliamp meter . Press ENTER to enter the adjustment.
6 . If c ontroller i s equipped with the programmable option ,
SCROLL DOWN to
LO RANGE
. As ind i cated on the displa y, use
the ARROW ke y s to set the
" lo
range " set point . Press ENTER to
e nter the adjustment . SCROLL DOWN to
HI RANGE
.
As indicat-
e d on th e display , use the ARROW keys to set the
" hi
range " set
point. Press ENTER to enter the adjustment .
7 . Pr e ss SCROLL DOWN for add i tional analog outputs to be set ,
or p r ess HOME repeat e dl y t o return to
MAIN MENU-CONFIGURE
.
8 . R e move milliamp meter and connect analog r e corder , metering
pump or computer . Be sur e to maintain proper polarity when con-
necting external devices !
Configure
D / A Out Select
D / A out
#1
param
• sys cond
D / A
#1
lo adjust
ARROWS to change
D / A
#1
h i
adjust
ARROWS to change
D / A
#1
lo range
0 us / cm
D / A
#1
h i range
5000
us / cm
16
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