Fluke 2638A/20 Product Manual - Page 77

Illustration of a Scan Sweep, Table 4-2. Settling Time Delay Values, Type and Range

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2638A Users Manual • The total channel sample time is the minimum sample time plus the userprogrammed channel delay. The longer the channel delay, the longer it takes to sample the channel. • The total scan sweep time is sum of the channel sample times of all the channels scanned. A scan sweep will start when the selected trigger source is asserted if a previous scan sweep is not still in progress (see "Trigger Type" on page 4-6). • The interval at which scan sweeps occur can be fixed by programming the trigger type to Timer and setting an interval time. SCAN START Channel List Channel 102 Channel 104 Key: - Sample Time* - Channel Delay *Consists of NPLC time, settling time, and ADC samples. Scan Cycle 1 Remaining Interval Scan Cycle 2 RReemmaaiinniinngg IInntteerrvvaall Channel 115 Channel Delay Set Channel 117 Channel Delay Set Channel 121 Sweep Time Scan Interval Sweep Time Scan Interval SCAN FINISH Figure 4-2. Illustration of a Scan Sweep Table 4-2. Settling Time Delay Values Type and Range 100 mV dc 1 V dc 10 V dc 100 V dc 300 V dc ACV all ranges 20 Hz filter ACV all ranges 200 Hz filter A dc (all ranges) Time Delay 0 ms 0 ms 0 ms 100 ms 100 ms 400 ms 100 ms 0 ms hcn050.eps 4-4 MyFlukeStore Shop for Fluke products online at: www. .com 1.888.610.7664

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2638A
Users Manual
4-4
•
The total channel sample time is the minimum sample time plus the user-
programmed channel delay. The longer the channel delay, the longer it takes to
sample the channel.
•
The total scan sweep time is sum of the channel sample times of all the channels
scanned. A scan sweep will start when the selected trigger source is asserted if a
previous scan sweep is not still in progress (see "Trigger Type" on page 4-6).
•
The interval at which scan sweeps occur can be fixed by programming the trigger
type to Timer and setting an interval time.
Channel List
SCAN START
Channel 102
Channel 104
Channel 115
Channel Delay Set
Channel 117
Channel Delay Set
Channel 121
- Sample Time*
Key:
*Consists of NPLC time, settling time, and ADC samples.
- Channel Delay
Sweep Time
SCAN FINISH
Sweep Time
Scan Cycle 1
Scan Cycle 2
Scan Interval
Scan Interval
Remaining
Interval
Remaining
Interval
hcn050.eps
Figure 4-2. Illustration of a Scan Sweep
Table 4-2. Settling Time Delay Values
Type and Range
Time Delay
100 mV dc
0 ms
1 V dc
0 ms
10 V dc
0 ms
100 V dc
100 ms
300 V dc
100 ms
ACV all ranges 20 Hz filter
400 ms
ACV all ranges 200 Hz filter
100 ms
A dc (all ranges)
0 ms
Shop for Fluke products online at:
1.888.610.7664
www.
MyFlukeStore
.com