Hach lange APA 6000 Handbuch Seite 8

1. Push MENU and select SENSOR MENU>APA6000 #1 APA
6000>MEASUREMENT OPTIONS.
2. Select an option.
Option Description
CHEMICAL FORM Select the chemical form shown on the display.
SAMPLE Set the sample sequence. This option is only available
SEQUENCE when the number of sample streams is set to 2. Refer
to Sensor diagnostics in the maintenance manual.
DISPLAY Not used
UNITS Select HOLD OUTPUTS. Select the units shown for
the parameter—mg/l, ug/l, ppm, ppb, etc.
Schedule automatic cleanings
The manufacturer recommends that a cleaning cycle is done:
• High range hardness, low range hardness and alkalinity analyzers—
once a day
• Low range ammonia and ammonia/monochloramine analyzers—every
12 hours
A cleaning cycle dispenses cleaning solution through all the wetted parts
of the analyzer. Cleanings keep the analyzer free of contamination
buildup.
Note: The auto refresh function is not used.
1. Push MENU and select SENSOR MENU>APA6000 #1 APA
6000>SOLUTIONS AND CLEANING>INSTRUMENT CLEAN.
2. Set the schedule for automatic cleanings—4, 6 or 12 HOURS or
EVERY DAY (default). The first cleaning cycle of the day is done at
12:00 am (00:00 on a 24-hour clock).
Configure the alarms (optional)
Configure Alarm A and Alarm B as set point alarms or to occur when a
sensor warning or sensor alarm occurs. When an Alarm A or Alarm B
occurs, it is recorded in an alarm log. If the flash on alarm setting is
enabled, the screen also flashes.
8 English
Alarm A and Alarm B each have an associated alarm relay that
energizes when the alarm occurs. Refer to
on page 9 to enable the alarm relays.
Note: The other alarms (AL 1–AL 12) can also be configured and will occur even if
the alarm relay associated with the alarm is not used or present.
1. Push MENU and select SENSOR MENU>APA6000 #1 APA
6000>ALARM SETUP.
2. Select the alarm. For example, select AL A (Alarm A) or AL B (Alarm
B).
3. Select TYPE, then select the alarm type.
Option Description
Unconfigured Disable the alarm.
(default)
High Set the alarm to occur when a measurement higher
than the set point value (mg/L) occurs.
Low Set the alarm to occur when a measurement lower
than the set point value (mg/L) occurs.
Rate Set the alarm to occur when the measurement rate
change (mg/L per hour) is higher than the set point
value.
Sensor Warning Set the alarm to occur when a sensor warning is
active.
Sensor Alarm Set the alarm to occur when a sensor alarm is active.
4. If High, Low or Rate is selected, select the measured parameter to
monitor and the set point value.
Option Description
MEASUREMENT Select the measurement parameter (e.g., 1 HR HAR for
high range hardness) to monitor.
SET POINT Enter the set point value.
Alarm relay setup