5-10
Matec Applied Sciences
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Table 5-3 Signal Voltage Ranges
Signal
Signal Connector
Module Terminals
Minimum Voltage
Maximum Voltage
AU OUT
1 (+) and 2 (–)
–100 mV
+2000 mV
PRESS OUT
3 (+) and 4 (–)
0 mV
10 mV
%B OUT
5 (+) and 6 (–)
0 mV
10 mV
To test the signals:
1.
Choose Test Volt. out. To display the voltage (in mV) being applied to the AU OUT,
PRESS OUT, and %B OUT terminals on the signal connector module.
2.
Connect a voltmeter to the AU OUT terminals on the signal connector module.
3.
Rotate the selector knob to vary the voltage being applied to the AU OUT terminals on the
signal connector module.
4.
Compare the displayed voltage to the voltage indicated on the voltmeter to gauge the
accuracy of the signal on the signal connector module. The voltages should be within
± 1.0 mV of each other.
5.
Repeat steps 2 through 4 for the PRESS OUT and %B OUT signals.
6.
Press the selector knob to return to the Run Diagnostics screen.
Test Keypad Diagnostic
Use the Test Keypad diagnostic to test the keypad control keys.
To test the keypad control keys:
1.
Choose Test Keypad. The display shows a line of characters, each of which corresponds to
one of the controls keys on the control panel keypad.
2.
Test the control keys by pressing each key and verifying that the corresponding screen
character highlights.
3.
Press the selector knob to return to the Run Diagnostics screen.
Wavelength vs AU Diagnostic
Use the Show Energy, AU,
λ
diagnostic to verify correct absorbance detector calibration.
To verify correct absorbance detector calibration:
1.
Choose Wavelength vs. AU. The absorbance detector parameters appear (Figure 5-6).
Figure 5-6 Show Energy, AU,
λ
Diagnostic Display
Each Show Energy, AU,
λ
diagnostic parameter is defined below.
•
REF – The level of lamp energy measured by the reference photodiode.
•
SMP – The level of lamp energy measured by the sample photodiode.
REF=xxxx SMP=xxxx L=xxx AU=±x.xxx
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