9250-05-Manual.DOC
07/19/00
High-Speed Resistance Tester – Model 9250-05
Operators Manual
10
Invalid Command Response
Any time an invalid command is sent via the serial communications link to the Model 9250-05, the
system will respond with a “What?” statement. The following example shows the Set LOW Limit
command being used with an improper sequence.
Command> *M ABCDEF
What?
Any time a “What?” response is received in the communications terminal software, check the
command sequence that was previously entered and re-enter the command sequence properly.
Averaging Setting:
The Set Average command will change the number of averages that will be used to calculate the
resistance reading using the example formula (XXXXXX = number of readings, factory default
value is 60 readings) on the next page.
The averaging value will affect the update rate as shown in Table 11 (9600 baud):
Setting
Update Rate
1
110Hz
100
83Hz
200
33Hz
500
15Hz
1000
8Hz
10000
0.8Hz
Tab le 11: Update Rates with
Averaging Settings
Higher baud rate settings will increase the update rate.
Example:
57600 baud with averages @ 1 = 250Hz update rate.
Averaging Formula:
Output reading = (SUM of readings) divided by setting value.
Example:
A total of 100 readings is required for averaging. Enter the following command
sequence for setting the averaging:
Command> *A 100
The 100 readings are totaled and divided by 100 to give the average readings. With no averaging,
the actual readings will be displayed.
Typically, the averaging setting is 60 with Line SYNC set on. This gives the best overall output for
the system.
