ATI
Q46UV UV254/Turbidity Monitor
Part 5 - Configuration
32
O&M Manual
Rev-D (11/19)
Rly A Mode
Relay A can be used in three different ways: as a setpoint control, as a
fail alarm, or as a HI-LO alarm band. The three settings for Rly A Mode
are
CON
,
FAIL
and
AL
.
The
CON
setting enables normal control operation for Relay A, with
settings for setpoint, hysteresis, delay and phasing appearing in the
CONTROL menu automatically. See Figure 22 for further details.
The
AL
setting allows two setpoints to be selected for the same relay,
producing a HI-LO alarm band. In this mode, Relay A will trip inside or
outside of the band, depending upon the Phase selected. See Figure 23
for further details.
The
FAIL
setting enables the fail alarm mode for Relay A. Relay A will
then trip on any condition that causes the FAIL icon to be displayed on
the LCD. Using this mode allows the User to send alarm indications to
other remote devices.
Relay B Mode
Relay B can be used in two ways: as a setpoint control or as
Relay C Mode
a fail alarm. The settings for Relay B Mode are
CON, FAIL
and they are
the same as those modes in relay A
*Relay D Mode
OPTIONAL.
Relays D, E, and F can be used in two ways: as a setpoint
*Relay E Mode
control, or as a fail alarm. The two settings for Relay D, E, & F Mode
*Relay F Mode
are
CON
and
FAIL
. This function sets the display units for temperature
Temp Units
measurement. Press ENTER to initiate user entry mode, and the entire
value will flash. Use the UP arrow key to modify the desired display
value. The choices are
°F
and
°C
. Press ENTER to store the new value.
5.25 Control Menu [CONTROL]
The Control Menu contains all of the output control user settings. Note that PID menu items will
not appear unless output 1 is configured for PID mode in the CONFIG menu.
Set PID 0%
If the PID is enabled, this function sets the minimum and
Set PID 100%
maximum controller end points. Unlike the standard 4-20
[Iout1=PID]
mA output, the controller does not “scale” output values across the
endpoints. Rather, the endpoints determine where the controller would
normally force minimum or maximum output in an attempt to recover the
setpoint (even though the controller can achieve 0% or 100% anywhere
within the range.)
If the 0% point is lower than the 100% point, then the controller action
will be “reverse” acting. That is, the output of the controller will increase
if the measured value is less than the setpoint, and the output will
decrease if the measured value is larger than the setpoint. Flipping the
stored values in these points will reverse the action of the controller to
“direct” mode.
The entry value is limited to a value within the range specified in “Set
Range”, and the 0% and the 100% point must be separated by at least
1% of this range Use the LEFT arrow key to select the first digit to be
modified. Then
use the UP and LEFT arrow keys to select the desired
numerical value. Press ENTER to store the new value.
