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Model 6220/6221 Reference Manual
Delta, Pulse Delta, and Differential Conductance
5-17
Return to
Setting measurement units
From the front panel, units can be set as follows:
1.
Press the
UNITS
key to display the READING UNITS menu.
2.
Use the
controls (see
) to select the desired
measurement units (
VOLTS
,
OHMS
,
WATTS,
or
SIEMENS
).
3.
Model 6221 only – After selecting
WATTS
, you will be prompted to select
the POWER TYPE.
4.
Select the desired power type (
AVERAGE
or
PEAK
).
Remote programming
– Commands for setting units for the Model 622x are
listed in
.
Example
– Selects power (W) measurement units for the Model 622x:
UNIT W
Display readings
Display reading examples:
+1.23456 nV Delta
Delta voltage reading
+1.23456
Ω
Delta
Delta ohms reading
+1.23456 S D Cond
Differential Conductance Siemens reading
+1.23456 mWp Pulse
Pulse Delta peak power (Watts) reading
1, 2, 3
+1.23456 mW Pulse
Pulse Delta average power (Watts) reading
1, 2, 3
1.
Pulse Delta power can be a peak power reading or an average power read-
ing (see
“Peak power and average power,” on page 5-34
for details).
2.
For remote operation, the returned reading string for a Delta Pulse power
reading does indicate if it is a peak or average reading. Use the
UNIT:POWer? command (see
) to determine if the power reading
is peak or average.
Table 5-1
Measurement unit commands
Command
Description
Default
UNIT[:VOLT][:DC] <name>
Specify reading units*.
<name> = V, OHMS, W, or SIEMens
V
UNIT:POWer[:TYPE] <name>
Set power units reading type for 6221
Pulse Delta.
<name> = AVERage or PEAK
PEAK
UNIT:POWer[:TYPE]?
Query power units reading type.
* The <name> parameter for Siemens can be sent as S, SIEM, or SIEMENS.
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