MR8740T_user_manual_eng_20191016H.pdf - 第227页

222 Information for Reference Purposes For saving data on Model Z4006 USB Drive d: days, h: hours, min: minutes, s: seconds Sampling rate Number of channels used 4 (16 channels) 8 (32 channels) 16 (64 channels) 27 (108 c…

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221
Information for Reference Purposes
Maximum recordable time when the real-time save is enabled (values
for reference purposes)
The maximum recordable time is expressed in the following equation.
(Maximum recordable time) = [(Recording capacity) × (Sampling time)] ÷ [(Number of
channels used) × 2]
(Number of channels used) = [(Number of analog channels other than Model MR8990) + (Number of logic
modules) + (Number of Model MR8990 channels)] × 2 + (Number of real-time
calculation channels) × 2
The maximum recordable times for saving data to each storage device are shown in the following
table (assume that each storage device is empty). Since no capacity of the header of a waveform
le is included, use about 90% of the recordable time provided in the table as a reference.
Some conditions allow a long-term recordable time (one year or more, shaded areas in the tables)
to be set; however, the operation cannot be guaranteed because the warranty period or product life
may disturb it.
For saving data on the built-in SSD
d: days, h: hours, min: minutes, s: seconds
Sampling rate
Number of channels used
4 (16 channels) 8 (32 channels) 16 (64 channels) 27 (108 channels)
5 MS/s*
50 min 00 s – – –
2 MS/s
2 h 5 min 00 s 1 h 2 min 00 s – –
1 MS/s
4 h 10 min 00 s 2 h 5 min 00 s 1 h 2 min 30 s –
500 kS/s
8 h 20 min 00 s 4 h 10 min 00 s 2 h 5 min 00 s 1 h 2 min 30 s
200 kS/s
20 h 50 min 00 s 10 h 25 min 00 s 5 h 12 min 30 s 2 h 36 min 15 s
100 kS/s
1 d 17 h 40 min 00 s 20 h 50 min 00 s 10 h 25 min 00 s 5 h 12 min 30 s
50 kS/s
3 d 10 h 20 min 00 s 1 d 17 h 40 min 00 s 20 h 50 min 00 s 10 h 25 min 00 s
20 kS/s
8 d 16 h 20 min 00 s 4 d 8 h 10 min 00 s 2 d 4 h 5 min 00 s 1 d 2 h 2 min 30 s
10 kS/s
17 d 8 h 40 min 00 s 8 d 16 h 20 min 00 s 4 d 8 h 10 min 00 s 2 d 4 h 5 min 00 s
5 kS/s
34 d 17 h 20 min 00 s 17 d 8 h 40 min 00 s 8 d16 h 20 min 00 s 4 d 8 h 10 min 00 s
2 kS/s
86 d 19 h 20 min 00 s 43 d 9 h 40 min 00 s 21 d16 h 50 min 00 s 10 d20 h 25 min 00 s
1 kS/s
173 d 14 h 40 min 00 s 86 d 19 h 20 min 00 s 43 d 9 h 40 min 00 s 21 d16 h 50 min 00 s
500 S/s
347 d 5 h 20 min 00 s 173 d 14 h 40 min 00 s 86 d19 h 20 min 00 s 43 d 9 h 40 min 00 s
200 S/s
868 d 1 h 20 min 00 s 434 d 0 h 40 min 00 s 217 d 0 h 20 min 00 s 108 d12 h 10 min 00 s
100 S/s
1736 d 2 h 40 min 00 s 868 d 1 h 20 min 00 s 434 d 0 h 40 min 00 s 217 d 0 h 20 min 00 s
50 S/s
3472 d 5 h 20 min 00 s 1736 d 2 h 40 min 00 s 868 d 1 h 20 min 00 s 434 d 0 h 40 min 00 s
20 S/s
8680 d 13 h 20 min 00 s 4340 d 6 h 40 min 00 s 2170 d 3 h 20 min 00 s 1085 d 1 h 40 min 00 s
10 S/s
10000 d 8680 d 13 h 20 min 00 s 4340 d 6 h 40 min 00 s 2170 d 3 h 20 min 00 s
5 S/s
10000 d 10000 d 8680 d13 h 20 min 00 s 4340 d 6 h 40 min 00 s
2 S/s
10000 d 10000 d 10000 d 10000 d
1 S/s
10000 d 10000 d 10000 d 10000 d
*: You can set the sampling rate at 5 MS/s only if the number of channels to be saved is 12 or less.
13
Appendix
222
Information for Reference Purposes
For saving data on Model Z4006 USB Drive
d: days, h: hours, min: minutes, s: seconds
Sampling rate
Number of channels used
4 (16 channels) 8 (32 channels) 16 (64 channels) 27 (108 channels)
1 MS/s*
8 min 20 s – – –
500 kS/s*
16 min 40 s 8 min 20 s – –
200 kS/s
41 min 40 s 20 min 50 s 10 min 25 s –
100 kS/s
1 h 23 min 20 s 41 min 40 s 20 min 50 s 10 min 25 s
50 kS/s
2 h 46 min 40 s 1 h 23 min 20 s 41 min 40 s 20 min 50 s
20 kS/s
6 h 56 min 40 s 3 h 28 min 20 s 1 h 44 min 10 s 52 min 5 s
10 kS/s
13 h 53 min 20 s 6 h 56 min 40 s 3 h 28 min 20 s 1 h 44 min 10 s
5 kS/s
1 d 3 h 46 min 40 s 13 h 53 min 20 s 6 h 56 min 40 s 3 h 28 min 20 s
2 kS/s
2 d 21 h 26 min 40 s 1 d 10 h 43 min 20 s 17 h 21 min 40 s 8 h 40 min 50 s
1 kS/s
5 d 18 h 53 min 20 s 2 d 21 h 26 min 40 s 1 d 10 h 43 min 20 s 17 h 21 min 40 s
500 S/s
11 d 13 h 46 min 40 s 5 d 18 h 53 min 20 s 2 d 21 h 26 min 40 s 1 d 10 h 43 min 20 s
200 S/s
28 d 22 h 26 min 40 s 14 d 11 h 13 min 20 s 7 d 5 h 36 min 40 s 3 d 14 h 48 min 20 s
100 S/s
57 d 20 h 53 min 20 s 28 d 22 h 26 min 40 s 14 d 11 h 13 min 20 s 7 d 5 h 36 min 40 s
50 S/s
115 d 17 h 46 min 40 s 57 d 20 h 53 min 20 s 28 d 22 h 26 min 40 s 14 d 11 h 13 min 20 s
20 S/s
289 d 8 h 26 min 40 s 144 d 16 h 13 min 20 s 72 d 8 h 6 min 40 s 36 d 4 h 3 min 20 s
10 S/s
578 d 16 h 53 min 20 s 289 d 8 h 26 min 40 s 144 d 16 h 13 min 20 s 72 d 8 h 6 min 40 s
5 S/s
1157 d 9 h 46 min 40 s 578 d 16 h 53 min 20 s 289 d 8 h 26 min 40 s 144 d 16 h 13 min 20 s
2 S/s
2893 d 12 h 26 min 40 s 1446 d 18 h 13 min 20 s 723 d 9 h 6 min 40 s 361 d 16 h 33 min 20 s
1 S/s
5787 d 0 h 53 min 20 s 2893 d 12 h 26 min 40 s 1446 d 18 h 13 min 20 s 723 d 9 h 6 min 40 s
*: You can set the sampling rate at 1 MS/s only if the number of channels to be saved is 12 or less; 500 kS/s,
24 or less.
223
Information for Reference Purposes
Scaling method for strain gauges
This section describes how to determine the scaling conversion ratio when measurement is
performed with strain gauges and Model U8969 Strain Unit.
The appropriate conversion equation into stress varies depending on how the strain gauges are
used.
Three methods are available: the 1-gauge (for a gauge), 2-gauge (for two gauges), and 4-gauge
methods (for four gauges). The 2-gauge method is used for strain measurement involving
temperature compensation.
E: Young’s modulus,
ν
: Poisson’s ratio,
e
: Measured strain value
Measuring tensile and compressive stress: Stress (
σ
) = E ×
e
When 2- or 4-gauge method measurement is performed involving temperature compensation,
position the gauges perpendicularly to each other.
The stress (
σ
) is multiplied by 1 / (1 +
ν
) for the 2-gauge method, and 1 / [2 (1 +
ν
)] for the 4-gauge
method.
Measuring bending stress: Stress (
σ
) = E ×
e
When 2- or 4-gauge measurement is performed involving temperature compensation, the stress (
σ
)
is multiplied by 1/2 or 1/4, respectively.
Measuring torsional stress: Stress (
σ
) = E / [2 (1 +
ν
)] ×
e
(2-gauge method)
When the 4-gauge method is used, the stress is halved.
Refer to the instruction manual of the strain gauge for how to combine strain gauges for each
measurement.
Example: Measuring compressive stress
Using the 1-gauge method, material of measured object: aluminum, Young’s modulus: 73 (GPa)
(Refer to the table below.)
σ
= 73 × 10
9
× (Measured value) × 10
−6
(unit of measured value:
me
)
= 73 × (Measured value) (unit: kPa)
= 7.44* × (Measured value) (unit: gf/mm
2
)
*: 1 Pa = 1.01971621 × 10
−7
kgf/mm
2
= 1 N/m
2
Conversion ratio: 7.44, unit: gf/mm
2
Enter this value as the scaling conversion ratio.
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Appendix