F.W. Bell 8000 series, Инструкция по эксплуатации

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F.W. BELL 8000 Series Gauss/Tesla Meter Instruction Manual
Section 6 – Flux Density Measurement 6-9
Zeroing
Automatic Zeroing
The meter’s automatic zero can be configured to zero in one of the three
modes listed below.
DC Only zeroing provides the shortest zeroing process delay and as the name
suggests, only measures and applies zeroing factors for DC Mode
measurements.
Basic zeroing provides both DC and AC mode zeroing, but the AC zeroing
process has a reduced process delay that provides slightly less accurate
results. For most purposes the basic AC zeroing is sufficient to provide results
within the rated accuracy for RMS averaged measurements.
Advanced zeroing provides both DC and AC mode zeroing with the best AC
zeroing accuracy. This mode requires a substantially longer zeroing period but
offers the best performance for all AC measurement modes.
The estimated zeroing times for each of these modes is shown in Table 6.4.
Table 6-4 Estimated Zeroing Times
Zeroing Mode Estimated Zeroing Time
DC Only 30 seconds
Basic (DC & Basic AC) 60 seconds
Advanced (DC & Advanced AC 90 seconds
NOTE: The process of zeroing also affects other functions such as corrected analog output
signals, the hold and relative, and the field classifiers. Uncorrected analog outputs are not
affected
Initiating an Automatic Zero
To initiate zeroing on one channel
1) Set the channel’s Auto Zero Menu to the desired zero mode.
2) Prepare the probe for zeroing.
3) Press the [Auto Zero] menu button or the zero key for the appropriate
channel.
To initiate zeroing on all channels. (8030 Only)
1) Set the All Channels Auto Zero Menu to the desired zero mode.
2) Prepare all probes for zeroing.
3) Press the All Channels, [Auto Zero] menu button.