YSI 5200A - Manual (Page 66)

YSI 5200A
130 YSI 5200A
131
It is important to keep the 5200A at the Run Screen during normal -
operation. Alarm functionality (alarm emails, activation of enabled
alarm relays, alarm icons, and buzzer) is suspended when 5200A is
not at Run Screen.
Alarm icon(s) display at the Run Screen when alarm condition(s) exists -
for longer than the general alarm hold off time. See Icons - page 67.
Press - at Run Screen to display active sensor system relays.
Press - to display events created by control and alarm relays - see
Event Log - page 104.
Alarm relays are not energized if the 5200A sensor value reads “Over” -
or “Under.”
See Wire Relays - - page 46 for information on wiring alarm output de-
vices.
Figure 4.7 shows how the 5200A operates based on a sensor setup configuration.
In this example, the DO range low 1 and range low 2 relays energize at ≤ 5.0 mg/l
and ≤4.0 mg/l respectively. DO range high 1 and range high 2 relays energize at ≥
8.5 mg/l and ≥ 8.7 mg/l respectively. The alarm system becomes active at ≤3.5 mg/l
(low alarm) or ≥ 8.9 mg/l (high alarm).
Range #1
Low
Alarm
ON
High
Alarm
ON
High
Range #1
ON
Optimal
S etpoint
Value
Lower
Parameter
Values
High
Alarm
Setpoint
Low
Alarm
Setpoint
Higher
Parameter
Values
DO Range #2
High
Range #2
ON
Low
Range #1
ON
Low
Range #2
ON
Acceptable
Operating
Range
Conductivity/ORP/pH & Temperature have 1 Control Range
DO has 2 Control Ranges
3.5 mg/l 4.0 5.0 8.1 8.5 8.7 8.9
Figure 4.7
Validation Error and Autofix
When an invalid value is entered at the numeric keypad, a Validation Error window
displays. An invalid value is either a value outside the range of the sensor system
or a value that breaches other settings within the sensor system. Autofix occurs
when a high or low control value is entered that breaches the set point value. See
examples below.
Configuring the 5200A
Low range control value must be < set point value. High range control value must
be > set point value. Low alarm value must be < low control value. High alarm value
must be > high control value.
Example 1 - entering “63” for a DO set point results in a validation error because the
valid range for the DO sensor system is 0.00 to 60.0 mg/L. The user must configure
the value within the operating range. In addition, the value cannot breach respective
control and alarm system values.
Example 2 - configuring set point value of 8.00 mg/L with range low value of 8.00
mg/L results in validation error. The valid set point range is displayed in validation er-
ror message. Press
to return to numeric keypad and to enter a valid value.
Autofix occurs when a high or low control value is entered that breaches the set point
value. Autofix changes the high or low control value by one least significant digit
away from the set point value. The set point value is never adjusted.
Example 3 - Entering 8.00 mg/L as the range low value when the set point value is
8.00 mg/L results in an auto fix of the control value. The invalid control value is
displayed at the sensor setup menu. Pressing
is not an option after saving
a value at numeric keypad. Press from the sensor setup menu to continue
with the autofix. A validation error window is displayed to show that the autofix has
occurred. Press
to return to sensor setup menu. Verify that the autofixed
values are configured for user’s specific application and reconfigure as necessary.
Press
to save configuration and return to Run Screen.
Configuring the 5200A