Scan Operations - Fluke 8508A User Manual

8508A
Users Manual

SCAN OPERATIONS

In each of three Scan modes, measurements are taken alternately from the Front and Rear
Terminals and are combined mathematically to produce a single result as shown below.



Scan of the Current functions - Scan is not available in the ACI and DCI
functions.
Scan of the Ohms functions - In the Ohms and HiV Ohms functions the
Scan Operation switches both current stimulus and potential difference
measurement between the Front and Rear terminals. The Tru Ohms Ratio
feature described below scans only the potential difference measurement
between Front and Rear terminals, maintaining stimulus current through
both Front and Rear terminals.
To avoid LETHAL electrical shock DO NOT CONNECT EXTERNAL
CAPACITANCE greater than 50 nF to the Multimeter terminals.
The maximum voltage across the measured resistor or open Multimeter
terminals while using the HiVΩ function is 240 V. The maximum current
that the Multimeter will source while using HiVΩ is 10
2.0 mA (Guard to Hi if Ext Guard is selected). These characteristics are
not considered "Hazardous Live" within the Safety standards applied
to this instrument. However, capacitors (>50 nF) external to the
Multimeter could accumulate LETHAL charge while making a HiVΩ
measurement. DO NOT TOUCH the Multimeter terminals or circuitry
under test unless you are sure it is safe to do so.
3-30
Scan Menu
Readings are taken alternately from the front terminals and then the rear to
produce the displayed result; Front reading – Rear reading.
Readings are taken alternately from the front terminals and then the rear to
produce the displayed result; Front reading / Rear reading.
Readings are taken alternately from the front terminals and then the rear to
produce the displayed result; This is the normalized 'deviation' value.
Note
Note
 Warning
DANGER OF LETHAL ELECTRIC SHOCK
adj128f.eps
µ
A (Lo to Hi), or