Model 6220/6221 Reference Manual Delta, Pulse Delta, and Differential Conductance 5-27
Return to Section 5 topics
Operation
Delta operation – front panel
The system configuration for front panel stand-alone operation is shown in
Figure 5-2A on page 5-5.
1. Connections are shown in the following figures. All power must be removed
from all components in the system before making connections:
• Figure 5-3, page 5-7 – System connections.
• Figure 5-5, page 5-10 – DUT test connections.
2. Configure communications for the Models 2182/2182A and 622x as
explained in “Configuring communications,” on page 5-10.
3. On the Model 2182/2182A, select the desired measurement range (using
the RANGE keys) and the integration rate (using the RATE key). Rate must
be set to an integer value (1, 2, 3, ... up to 50 or 60). If some other rate is
selected, it will automatically be changed to 1PLC by the Model 622x during
the arming process.
4. On the Model 622x, press CONFIG and then DELTA to access the
CONFIGURE DELTA menu. For details on these settings, see “Configura-
tion settings,” on page 5-24.
a. Set I-HIGH, I-LOW, DELAY, COUNT, and COMPLIANCE ABORT.
b. When finished, use the EXIT key to back out of the menu structure.
5. Set the measurement units.
The basic Delta reading is in volts (which is the default setting). However, it
can instead be expressed (and displayed) as an Ohms, Watts, or Siemens
reading. See “Measurement units,” on page 5-16 for details.
To set the measurement units, press the UNITS key to display the
READING UNITS menu. Select VOLTS, OHMS, WATTS, or SIEMENS.
Measurement units can be changed while Delta is running.
6. On the Model 622x, press the DELTA key to arm Delta.
Details on the “Arming process” are provided on page 5-24. The Model
6221 is armed when the message “DELTA ARMED Press TRIG to start” is
displayed briefly and the ARM annunciator turns on.
7. On the Model 622x, press the TRIG key to start taking Delta readings and
send them to the buffer.
NOTE Delta readings from the Model 2182/2182A will
be unfiltered. Noisy Delta readings can be fil-
tered by the Model 622x before sending them
into the buffer. See Section 6 for details.
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