Solartron Mobrey 3595 4C, User Manual

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3595 4C User Manual Part Two IMP Commands
35952350 (CH01/AA)
1-29
Function: Sets the integration time of all analogue measurements. It provides for optimum rejection of
50Hz, 60Hz or 400Hz supply frequencies. Also allows a shorter integration time to be
selected for increased scan rates, at the expense of reduced interference rejection. (Note: A
‘scan’ refers to the series of measurements made on all IMP channels and obtained on data
stream 0.) Typical scan rates (scans per second) obtained with shorter integration times are
show in Table 1.13.
The scan rates shown in Table 1.13 are for individual IMP devices on a fixed voltage range.
(See SP command for further information.) Mixing fast and slow IMP devices in a large
system may result in the fast IMP being slowed down.
xxxxxx shows the effect on the overall scan rate of increasing the number of fast IMP devices
(types 1A and 1B) in a five-IMP system. With a small system, such as this, the fast IMP
devices are not slowed down by the slow IMP devices. Actual throughputs are also
dependent on the PC and the application software.
xxxxxx shows the effect on the overall scan rate of increasing the number of fast IMP devices
(types 1A and 1B) in a five-IMP system. With a small system, such as this, the fast IMP
devices are not slowed down by the slow IMP devices. Actual throughputs are also
dependent on the PC and the application software.
Response: Error FF87 ‘Unknown mode, type or range’ is returned instead of a measurement value when
an unsupported integration time is requested.
See also: SP
Table 1.13: Scan rates V integration times for totally fast IMP system
Scans per second
Integration Time
3595 1A 3595 1B 3595 1C
20ms (FR0) 1.56 2.01 1.48
16.67ms (FR1) 1.88 2.38 1.78
5.00ms (FR2) 5.41 5.85 4.48
4.17ms (FR3) 6.45 6.63 5.16
1.25ms (FR4) 12.95 11.33 9.10
1.04ms (FR5) 14.83 12.50 9.38
Table 1.14: Scan rate (scan/sec) v no. of fast five-IMP system
No. of Fast
IMPs (FR2) No. of Fast
IMPs (FR4) Combined Scan
Rate of Fast IMPs
No. of Slow
IMPs (FR0)
Combined Scan
Rate of Slow IMPs
Overall Scan
Rate
1 - 5 4 4 5+4=9
2 - 10 3 3 10+3 = 13
3 - 15 2 2 15+2=17
4 - 20 1 1 20+1=21
5 - 25 0 0 25+0=25
- 1 10 4 4 10+4=14
- 2 20 3 3 20+3=23
- 3 30 2 2 30+2=32
- 4 40 1 1 40+1=41
- 5 50 0 0 50+0=50