Keithley 6220 User Manual

Model 6220/6221 Reference Manual Delta, Pulse Delta, and Differential Conductance 5-17
Return to Section 5 topics
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 Menu navigation controls (see page 1-20) 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 Table 5-1
.
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 Table 5-1) 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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Keithley 6220 Specifications

General

Brand	Keithley
Model	6220
Category	Measuring Instruments
Language	English