NF FRA5097, Instruction Manual

Page: 131 / 192

5.3 Open and short correction
FRA5097 5-9
5.3.3 Open and short correction data memory
Battery backup is not used for open and short correction data memory. These data are lost when
power is cut and resupplied. Be sure to again enter the data after supplying power.
The capacity sum of the master and equalizer memories corresponds to 20,000 measurements. If
large amounts of data are stored in the master memory, the amount available for the correction
data is reduced and in some cases may be inadequate. In this event, erase the master memory
before storing the correction data.
5.3.4 Open and short correction function setting
The open and short correction function must be set to on in order to conduct measurements using
the open and short correction data. Use the menu [MEASURE] [BASIC FUNCTION] [OPEN
CORRECTION] and [SHORT CORRECTION] to select and deselect (on and off).
The
items can be selected independently. Table 5-4 shows the correction formulas for the item
on/off state combinations.
Table 5-4 Open and short correction formulas
Open correction Short correction Correction formula
OFF ON Zx=Z-Zs
ON OFF Zx=Zp × Z ÷ (Zp-Z)
ON ON Zx=Zp × (Z-Zs) ÷ (Zp-(Z-Zs))
Zx: Correction computation result
Z : Measurement value
Zs: Short correction data (CH1/CH2)
Zp: Open correction function (CH1/CH2)
These formulas apply regardless of the [ANALYSIS MODE].