User manual

5-16 Delta, Pulse Delta, and Differential Conductance Model 6220/6221 User’s Manual
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 illustrations. All power must be
removed from all components in the system before making connections:
• Figure 5-3, page 5-6 – System connections
• Figure 5-5, page 5-8 – DUT test connections
2. Configure communications for the Models 2182/2182A and 622x as
explained in “Configuring communications,” page 5-9.
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 5-15.
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 “Delta” on page 5-13 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.
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.
If a finite Delta count is being used, the Delta measurements will stop after
the last Delta measurement is performed. However, Delta remains armed
and can be run again by pressing the TRIG key. The new Delta readings
will overwrite the old readings in the buffer.
If the infinite Delta count is being used, Delta will run continuously. If the
buffer fills, Delta readings will stop being stored, even though Delta
continues to run.