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NOTE
The previous calculation shows Filter enabled. If Filter is not used, remove the "Filt"
component from the calculation.
When Ratio is enabled, the state (on or off) of the REL annunciator depends on which
measurement function was last selected. If on DCV1 when Ratio is enabled, the state of the REL
annunciator (on or off) will indicate the state (enabled or disabled) of Rel for DCV1. If on DCV2
when Ratio is enabled, the state if the REL annunciator will indicate the state of Rel for DCV2.
The REL key is operational while in Ratio. Pressing REL will either disable Rel for both
channels or enable Rel for both channels (REL annunciator turns on). When Rel is enabled, the
instrument acquires the input signal from each of the two channels as Rel values. Each Rel value
is then applied to the respective channel. Keep in mind that the Rel operations are performed on
the input channels, not on the result of Ratio.
Ranging considerations
As explained in
Section
voltage channel. When Ratio is enabled, the range setting for each channel is retained. For
example, Channel 1 could be set for autoranging, and Channel 2 could be fixed on the 10V
range.
Range control — The manual range keys can only control one of the two channels. If the
instrument is on DCV1, TEMP1, or TEMP2 when Ratio is enabled, the manual range keys will
control Channel 1 (DCV1). The manual range keys will have no effect on Channel 2 (DCV2). If
on DCV2 (Channel 2) when Ratio is enabled, range control will apply to Channel 2 (DCV2).
The manual range keys will have no effect on Channel 1 (DCV1).
NOTES
• When Ratio is selected, the range control channel will be displayed while the
"CH1 / CH2" message is being displayed.
• When a range key is pressed, the channel number annunciator for the range
controlled channel remains on. The other channel annunciator turns off for a
brief moment.
• The state (on or off) of the AUTO range annunciator indicates the state
(enabled or disabled) of autorange for the voltage channel that is under range
control.
• With Ratio already enabled, pressing the AUTO range key will either disable
autorange for both channels or enable autorange for both channels (AUTO
annunciator turns on).
3, a separate range setting (fixed or AUTO) can be used for each
Ratio and Delta
5-5
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