Calibration; N O T I C E - Hach lange APA 6000 Handbuch

Note: During a cleaning cycle, the recorder outputs are held at their current
settings until the first sample cycle that follows the cleaning is completed.
1. Push MENU and select SENSOR MENU>APA6000 #1 APA
6000>RECORDER/CONTROL SETUP.
2. Select the recorder output. For example, select RC A (Recorder A) or
RC B (Recorder B).
3. Select TYPE>RECORDER.
Note: To disable the recorder output, select TYPE>UNCONFIGURED.
4. Select an option.
Option Description
MEASUREMENT Select the measurement parameter (e.g., 1 HR HAR for
high range hardness) to monitor.
MIN Select the measurement value (mg/L) that will result in
the minimum (0 or 4 mA) recorder output.
MAX Select the measurement value (mg/L) that will result in
the maximum (20 mA) recorder output.
ENABLED Enable (On) or disabled (Off) the recorder output. When
disabled, the recorder output stays at the minimum value
(0 or 4 mA).
MEAS FAILURE Set the recorder output to Go Max (20 mA), Go Min (0 or
4 mA) or Hold (keep the current value) when a
measurement failure occurs.
OUTPUT SETUP Adjust the minimum and maximum recorder outputs.
ZERO SCALE TRIM—0.0 to 11 mA. FULL SCALE TRIM
—13.2 to 22.5 mA.
Set the recorder output range—0–20 mA or 4–20 mA.
Network connection setup
If the network connection is used, configure the external Aquatrend
network device or the attached analyzer using the Other Device Menu
and Network Menu. The Other Device Menu and Network Menu are only
used when the network connection is used. Refer to the instructions in
the AquaTrend Interface Manual.
10 English
Measure a grab sample or standard

N O T I C E

Make sure that the analyzer is in shutdown mode before the sample line is
disconnected. Dry operation may damage the analyzer.
Use the supplied grab sample kit to measure grab samples taken from
other areas in the system or to measure a standard for a calibration
verification.
Refer to the instructions supplied in the grab sample kit for installation
and operation instructions. Put the analyzer in shutdown (standby) mode
before the sample inlet line is disconnected. Refer to Put the analyzer in
shutdown mode in the maintenance manual.

Calibration

A calibration uses the installed known standards to calibrate the
analyzer. Calibration can be started manually or scheduled to occur
automatically. The manufacturer recommends that automatic calibrations
be scheduled.
Schedule automatic calibrations
The manufacturer recommends that a calibration is done once a day.
1. Push MENU and select SENSOR MENU>APA6000 #1 APA
6000>CALIBRATION>AUTO-CAL SETUP.
2. Set the schedule for automatic calibrations—Off (disabled), 12 hours,
once a day or once a week on a specific day (default = Monday).
Note: If 12 hours is selected, a calibrate is done every 12 hours. For example,
if the Auto-Cal Time is set to 14, a calibration is done at 2:00 pm and 2:00 am
each day.
3. Select AUTO-CAL TIME and select the hour of the day (24-hour
clock) a calibration is done—0–23 (default = 4 = 4:00 am).
Note: Do not schedule a calibration to occur at 12:00 am because a cleaning
cycle starts automatically at 12:00 am. Cleaning solution in the tubing can
result in a calibration with an accuracy error.