- 67 - 325.6610.17
The basic AO calibration procedure is as follows:
•
Enter minimum output current in
ANALOG OUTPUT-OUTPUT
menu parameter.
•
Adjust value of
ANALOG OUTPUT-CALIBRATION-OFFSET
menu parameter until output
current matches value selected.
•
Enter maximum output current in
ANALOG OUTPUT-OUTPUT
menu parameter.
•
Adjust value of
ANALOG OUTPUT-CALIBRATION-GAIN
menu parameter until output current
matches value selected.
5.2.1 Minimum Output Current Calibration
a. Turn the sensor channel off by selecting off from the
SETUP-CONFIGURE-
INSTRUMENT-CHANNELS-SENSOR
TYPE
menu parameter.
b.
Enter
the
CHANNELS-ANALOG OUTPUT-OUTPUT
menu parameter.
c. Enter a desired minimum output current level, for example, 1% would be a typical
minimum value. An entry of 0% is not possible due to the nature of the analog output.
d. Measure the analog output current using an accurate current monitoring device with,
preferably, a digital readout accurate to 2 decimal places.
e. If a value of 1% was entered in the
OUTPUT
menu parameter and the
ANALOG
OUTPUT
MODE
selected is 0-20 mA, the desired output current should be:
% x (l max – l min) = l out
0.01 x (20 mA – 0 mA) = 0.20 mA
f. Adjust the value of the entry in the
ANALOG OUTPUT-CALIBRATION-OFFSET
menu
parameter until the current meter reads 0.20 mA.
5.2.2 Maximum Output Current Calibration
a.
If
not
already
OFF, turn the sensor channel off by selecting off from the
SETUP-
CONFIGURE-INSTRUMENT-CHANNELS-SENSOR
TYPE
menu parameter.
b.
Enter
the
CHANNELS-ANALOG OUTPUT-OUTPUT
menu parameter.
c. Enter a desired maximum output current level, for example, 100% would be a typical
maximum
value.
d. Measure the analog output current using an accurate current monitoring device with,
preferably, a digital readout accurate to 2 decimal places.
e. If a value of 100% was entered in the output menu parameter and the
ANALOG OUT
PUTMODE
selected is 0-20 mA, the desired output current should be:
1.0 x 20 mA = 20.00 mA
f. Adjust the value of the entry in the
ANALOG OUTPUT-CALIBRATION-GAIN
menu
parameter until the current meter reads 20.00 mA.
After both minimum and maximum output currents have been checked or calibrated, activate
the sensor channel by selecting the appropriate sensor from the
SETUP-CONFIGURE-
INSTRUMENT-CHANNELS-SENSOR TYPE
menu parameter.
Exit the
SETUP
mode by pressing the
SETUP
key. The
GAIN
and
OFFSET
values are
automatically loaded into the analog output board for permanent storage when exiting the
SETUP
mode.
Summary of Contents for Capital Controls CHLORALERT 17CA3000 Series
Page 14: ...325 6610 17 14 Figure 2 1 Receiver Outline Dimensions ...
Page 15: ... 15 325 6610 17 Figure 2 2 Sensor Transmitter Outline Dimensions ...
Page 16: ...325 6610 17 16 Figure 2 3 Interconnection Diagram ...
Page 18: ...325 6610 17 18 Figure 2 4 Sensor Wiring ...
Page 44: ...325 6610 17 44 ...
