Hach LXV526.98.2011A Betriebsanleitung Seite 25

1. Push menu, then select STOP ANALYZER.
Note: If START ANALYZER shows, the analyzer is already in standby mode.
2. Push cal, then select FLOW RATE CAL.
3. Wait for the calibration to complete (approximately 5 minutes).
4. Push enter to go to the measurement screen.
5. Push menu, then select START ANALYZER.
5.7 Calibrate the 4-20 mA analog outputs
If an analog output in the analyzer is connected to an external devices, calibrate the analog output as
necessary. The analog outputs are factory-calibrated. The adjustment range for analog output
calibration is ± 2 mA.
Note: If an analog output is configured to be 0–20 mA, 4 mA and 20 mA are calibrated.
1. Push menu, then select SETUP SYSTEM > CONFIGURE ANALYZER > SETUP OUTPUTS >
OUTPUT CALIBRATION > [select an output].
2. Select an option.
Option Description
CAL 4mA With a calibrated digital multimeter, measure the actual value supplied at the analog output.
Adjust the value shown until the signal at the analog output is 4.00 mA.
CAL 20mA With a calibrated digital multimeter, measure the actual value supplied at the analog output.
Adjust the value shown until the signal at the analog output is 20.00 mA.
Section 6 Operation
6.1 Show the details of the current and the last measurement
Push menu and select VIEW DATA > MEASUREMENT DATA. Refer to
Item
LAST MEAS TIME
LAST MEAS CHANNEL
NEXT MEAS TIME
NEXT MEAS CHANNEL
SAMPLE TEMPERATURE
FLOW RATE
LAST CONC
CONCENTRATION
RAW POTENTIAL
AVERAGE POTENTIAL
COMPENSATED POTENTIAL The temperature compensated mV value (potential) at 25 °C.
MEAS STABLE
4
pH
4
The pH value does not show if the optional cationic pump is installed.
Table 4 Measurement data descriptions
Description
The time the last measurement was completed.
The last channel measured.
The time the next measurement will be completed.
The next channel to be measured.
The temperature of the channel in use.
The flow rate of the channel in use.
The sodium concentration of the last channel measured.
The sodium concentration of the channel in use.
The real time mV signal. The potential between the two electrodes.
The six second average (approximately) of the mV signal.
Identifies if the measurement is stable (0 to 100). The larger the value, the more
stable the measurement.
The adjusted pH of the channel in use.
Table 4.
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