Fluke 8808A User Manual - Page 65

Cabling the Meter to a Host or Printer (RS-232), Operating the Meter Using the Computer Interface

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4 Operating the Meter Using the Computer Interface Preparing the Meter for Operations via the RS-232 Interface Table 4-2. Print Rates in RS-232 Print-Only Mode Rate (N) Seconds between Outputs Slow Medium Fast Minutes between Outputs Slow Medium Fast Hours between Outputs Slow Medium Fast 1 0.4 0.05 0.01 0.01 2 0.8 0.1 0.02 0.01 5 2.0 0.25 0.05 0.03 10 4.0 0.5 0.1 0.07 0.01 20 8.0 1.0 0.2 0.13 0.02 50 20.0 2.5 0.5 0.33 0.04 0.01 0.01 100 40.0 5.0 1.0 0.67 0.08 0.02 0.01 200 80.0 10.0 2.0 1.33 0.17 0.03 0.02 500 200.0 25.0 5.0 3.33 0.42 0.08 0.06 0.01 1000 400.0 50.0 10.0 6.67 0.83 0.17 0.11 0.01 2000 800.0 100.0 20.0 13.33 1.67 0.33 0.22 0.03 0.01 5000 2000.0 250.0 50.0 33.33 4.17 0.83 0.56 0.07 0.01 10000 4000.0 500.0 100.0 66.67 8.33 1.67 1.11 0.14 0.03 20000 8000.0 1000.0 200.0 133.33 16.67 3.33 2.22 0.28 0.06 50000 20000.0 2500.0 500.0 333.33 41.67 8.33 5.56 0.69 0.14 Cabling the Meter to a Host or Printer (RS-232) The Meter communicates with a host through a DB-9 interface connector on the rear panel of the Meter. A connector pinout for the RS-232 interface is provided on the rear of the Meter. Note When connecting the Meter to the host or terminal, use a cable appropriate to your application. It is recommended that you use a cable that is less than 50 feet long (15 meters), as this will help prevent performance degradation. Longer cables can be used if the load capacitance at the interface point (including signal terminator) is less than 2500 pf. To connect the Meter to a personal computer (with DB-9 connector), use a Fluke RS41-3 Null modem cable. Refer to Table 1-3. To connect the Meter to a specific brand of RS-232 printer, use the cable that would be used to connect that printer to an RS-232 port on a personal computer with a DB-9 connector. 4-5

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Operating the Meter Using the Computer Interface
Preparing the Meter for Operations via the RS-232 Interface
4
4-5
Table 4-2. Print Rates in RS-232 Print-Only Mode
Seconds between Outputs
Minutes between Outputs
Hours between Outputs
Rate
(N)
Slow
Medium
Fast
Slow
Medium
Fast
Slow
Medium
Fast
1
0.4
0.05
0.01
0.01
2
0.8
0.1
0.02
0.01
5
2.0
0.25
0.05
0.03
10
4.0
0.5
0.1
0.07
0.01
20
8.0
1.0
0.2
0.13
0.02
50
20.0
2.5
0.5
0.33
0.04
0.01
0.01
100
40.0
5.0
1.0
0.67
0.08
0.02
0.01
200
80.0
10.0
2.0
1.33
0.17
0.03
0.02
500
200.0
25.0
5.0
3.33
0.42
0.08
0.06
0.01
1000
400.0
50.0
10.0
6.67
0.83
0.17
0.11
0.01
2000
800.0
100.0
20.0
13.33
1.67
0.33
0.22
0.03
0.01
5000
2000.0
250.0
50.0
33.33
4.17
0.83
0.56
0.07
0.01
10000
4000.0
500.0
100.0
66.67
8.33
1.67
1.11
0.14
0.03
20000
8000.0
1000.0
200.0
133.33
16.67
3.33
2.22
0.28
0.06
50000
20000.0
2500.0
500.0
333.33
41.67
8.33
5.56
0.69
0.14
Cabling the Meter to a Host or Printer (RS-232)
The Meter communicates with a host through a DB-9 interface connector on the rear
panel of the Meter. A connector pinout for the RS-232 interface is provided on the rear of
the Meter.
Note
When connecting the Meter to the host or terminal, use a cable appropriate
to your application. It is recommended that you use a cable that is less than
50 feet long (15 meters), as this will help prevent performance degradation.
Longer cables can be used if the load capacitance at the interface point
(including signal terminator) is less than 2500 pf.
To connect the Meter to a personal computer (with DB-9 connector), use a Fluke RS41-3
Null modem cable. Refer to Table 1-3.
To connect the Meter to a specific brand of RS-232 printer, use the cable that would be
used to connect that printer to an RS-232 port on a personal computer with a DB-9
connector.