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5-40
Delta, Pulse Delta, and Differential Conductance
6.
7.
8.
9.
Operation – PC control
The system configuration for PC control of the Model 622x is shown in
Figure
1.
2.
3.
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 Differential Conductance is
running.
On the Model 622x, press the COND key to arm Differential Conductance.
The Model 6221 is armed when the message "DIFF COND ARMED Press
TRIG to start" is displayed briefly and the ARM annunciator turns on.
On the Model 622x, press the TRIG key to start taking Differential Conduc-
tance readings and send them to the buffer.
Differential Conductance measurements will stop after the last A/D
measurement is performed. However, Differential Conductance remains
armed and can be run again by pressing the TRIG key. The new Differential
Conductance readings will overwrite the old readings in the buffer.
When finished, press EXIT to disarm Differential Conductance.
On the Model 622x, press RECALL to access the Differential Conductance
readings stored in the buffer.
5-2B.
Connections are shown in the following illustrations. All power must be
removed from all components in the system before making connections:
•
Figure 5-4, page 5-7
•
Figure 5-5, page 5-8
Configure communications for the Models 2182/2182A and 622x as
explained in
"Configuring communications," page
On the Model 2182/2182A, select the desired measurement range and
integration rate. These Model 2182/2182A settings can be made from the
front panel or remote programming can be used. 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 Model 622x during the arming pro-
cess.
For front panel operation, use the RANGE keys to select the measurement
range. To set the integration rate, use the RATE key.
Commands from the PC to control the Model 2182/2182A are addressed to
the Model 622x. Each command is then routed through the Model 622x out
the serial port (RS-232) to the Model 2182/2182A. The following command
word is used for this communication process:
SYSTem:COMMunicate:SERial:SEND <data>
Where: <data> is a valid Model 2182/2182A command.
Return to
Model 6220/6221 User's Manual
– System connections
– Test connections
Section 5 topics
5-9.
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