Metrohm 746 VA Trace Analyzer - Manual (Page 563)

8 Technical data
746 VA Trace Analyzer / 747 VA Stand
8-2
Measured value processing
Spike elimination Automatic spike elimination with floating spike test, can
be supplemented by manual spike elimination if need be
Curve smoothing Automatic digital filtering
U.step Smoothing Number of
window points
2 48 mV 25
4 56 mV 15
6 60 mV 11
8 64 mV 9
10 60 mV 7
12 72 mV 7
Recognition Automatic peak/wave recognition for specific sub-
stances with the aid of preset criteria for characteristic
voltage, peak/wave width and peak/wave height
Baseline calculation Automatic calculation of the baseline with selectable
parameters (dependent on measurement mode)
Type linear (tangent), polynomial,
exponential, AC2 abs., AC2 rel.
Range entire peak, peak half, double peak
Evaluation Automatic calculation of the analysis results (peak
current, peak area or wave current) with the aid of the
determined baseline
Content calculation Automatic content calculation from the analysis results
by 3 different procedures:
standard addition (constant or prop.)
calibration curve
internal standard
Formula calculation Further calculation of analysis results and mass
concentrations using predefined formulae
Keypad
Type Piezoelectric, splashwater-proof
Keys Alphanumeric keypad with upper- and lowercase letters,
punctuation and special characters; numeric block;
dialog keys, main function keys, softkeys
Screen
Type LCD, backlit
Screen diagonal 257 mm (10”)
Resolution 640 × 400 points, 16 gray levels
28 lines, each of 80 characters
Refresh rate 72 Hz
Contrast adjustable