MR8740T_Quick guide_eng_20191016H.pdf - 第116页
11 0 Specications of the Options Threshold value ±10 V range: V ariable in the range of −10 V to +10 V (in 0.1 V increments) ±20 V range: V ariable in the range of −20 V to +20 V (in 0.2 V increments) ±50 V range: V ari…
109
Specications of the Options
Model 8970 Freq Unit
Conditions of guaranteed accuracy
Specied under the following conditions: installed in a Memory HiCorder and operated at 23°C±5°C (73°F±9°F) in the
humidity range of 20% to 80% RH after a half-hour (at least) warm-up.
Product warranty
period
3 years
Guaranteed accuracy
period
1 year
Measurement
functions
The following types of measurement based on voltage input: frequency, rotation speed,
power frequency, count, pulse duty ratio, and pulse width
Input terminals Insulated BNC terminal
Input resistance 1 M
Ω
±1%
Input capacitance 30 pF ±10 pF
Maximum input
voltage
400 V DC
Maximum rated
voltage to earth
300 V AC, DC (Measurement category II)
Anticipated transient overvoltage: 2500 V
(between each input channel and the enclosure, between any two of input channels)
Input type Unbalanced input (oating)
Frequency mode
Measurement range: 20, 100, 200 Hz, 1, 2, 10, 20, 100 kHz f.s.
Measurement accuracy: ±0.1% f.s. (except for the 100 kHz range)
±0.7% f.s. (the 100 kHz range)
Measurable range: DC to 100 kHz (minimum pulse width: 2 µs)
Rotation speed mode
Measurement range: 2 k, 10 k, 20 k, 100 k, 200 k, 1 M, 2 Mr/min f.s.
Measurement accuracy: ±0.1% f.s. (except for the 2 Mr/min range)
±0.7% f.s. (the 2 Mr/min range)
Measurable range: 0 Mr/min to 2 Mr/min (minimum pulse width: 2 μs)
Power frequency
mode
Measurement range: 50 Hz (40 Hz to 60 Hz), 60 Hz (50 Hz to 70 Hz), 400 Hz (390 Hz
to 410 Hz)
Measurement accuracy: ±0.03 Hz (50 Hz, 60 Hz), ±0.1 Hz (400 Hz)
Accumulation mode
Measurement range: 40 k, 200 k, 400 k, 2 M, 4 M, 20 M counts f.s.
Measurement accuracy: 0.0025% f.s.
Measurable range: DC to 100 kHz (minimum pulse width: 2 µs)
Duty ratio mode
Measurement range: 100% f.s.
Measurement accuracy: ±1% (10 Hz to 10 kHz)
±4% (10 kHz to 100 kHz)
Measurable range: 10 Hz to 100 kHz (minimum pulse width: 2 µs)
Pulse width mode
Measurement range: 10 ms, 20 ms, 100 ms, 200 ms, 1 s, 2 s f.s.
Measurement accuracy: ±0.1% f.s.
Measurable range: 2 µs to 2 s
Measurement
resolution
0.0025% f.s. (accumulation mode)
0.01% f.s. (except for accumulation mode or power frequency mode)
0.01 Hz (power frequency mode)
Response time Within the sum of 40 µs and the sampling interval of the instrument in which the module is
installed
Input voltage range ±10 V, ±20 V, ±50 V, ±100 V, ±200 V, ±400 V
5
Specications
110
Specications of the Options
Threshold value
±10 V range: Variable in the range of −10 V to +10 V (in 0.1 V increments)
±20 V range: Variable in the range of −20 V to +20 V (in 0.2 V increments)
±50 V range: Variable in the range of −50 V to +50 V (in 0.5 V increments)
±100 V range: Variable in the range of −100 V to +100 V (in 1 V increments)
±200 V range: Variable in the range of −200 V to +200 V (in 2 V increments)
±400 V range: Variable in the range of −400 V to +400 V (in 5 V increments)
Slope Rising, falling (frequency mode, rotation speed mode, power frequency mode,
accumulation mode)
Level High, low (duty ratio mode, pulse width mode)
Hold Frequency mode, rotation speed mode: On, Off (1 Hz, 0.5 Hz, 0.2 Hz, 0.1 Hz)
Operation with Off:
When the instrument cannot determine a subsequent measured value while the waiting
time (period) elapses, the instrument calculates a frequency and rotation speed based on
the time interval between the time it previously determines measured value and the time it
sampled the data, and records these calculated values.
When these calculated values are less than user-dened values, then the values will be
assumed to be zero.
Smoothing Off, On (frequency mode, rotation speed mode)
The permissible smoothing frequency is up to 10 kHz.
Low-pass lter Off, 5, 50, 500, 5 k, 50 k (Hz)
Input coupling DC, AC (Lower cutoff frequency in AC-coupled mode: 7 Hz)
Frequency dividing
function
Setting range: 1 to 4096, in one increments (frequency mode, rotation speed mode,
accumulation mode)
Accumulation start
timing
Start, trigger (accumulation mode)
Process performed
when accumulation
overows
Hold, back (accumulation mode)
Operating
temperature and
humidity
Consistent with the specications of the Memory HiCorder in which Model 8970 is
installed.
Operating
environment
Consistent with the specications of the Memory HiCorder in which Model 8970 is
installed.
Storage temperature
and humidity
Consistent with the specications of the Memory HiCorder in which Model 8970 is
installed.
Standards Safety: EN61010
EMC: EN61326 Class A
Dimensions Approx. 106W × 19.8H × 196.5D mm (4.17″W × 0.78″H × 7.74″D)
Mass Approx. 250 g (8.8 oz.)
111
Specications of the Options
Model 8971 Current Unit
Conditions of guaranteed accuracy
Specied under the following conditions: installed in a Memory HiCorder and operated at 23°C ±5°C (73°F ±9°F) in
the humidity range of 20% to 80% RH after a half-hour (at least) warm-up and execution of zero-adjustment.
Product warranty
period
3 years
Guaranteed accuracy
period
1 year
Number of input
channels
2 channels
Supported current
sensors
Models 9272-10, 9709, CT6841, CT6843, CT6844, CT6845, CT6846, CT6862, CT6863,
CT6865*
2
Hioki current sensors with RM515EPA-10PC (Hirose) installed
(Supported conversion ratio: 2 V/20 A, 2 V/50 A, 2 V/200 A, 2 V/500 A, 2 V/1000 A*
2
,
2 V/1000 A*
2
)
(Each sensor requires Model 9318 Conversion Cable to connect with Model 8971 Current
Unit)
Measurement range
When Model 9272-10 (20 A), Model 9277, or
Model CT6841 is used
2, 4, 10, 20, 40, 100 A f.s.
When Model CT6862 is used 4, 10, 20, 40, 100, 200 A f.s.
When Model 9272-10 (200 A), Model 9278,
Model CT6843, or Model CT6863 is used 20, 40, 100, 200, 400, 1000 A f.s.
When Model 9279, Model 9709, Model
CT6844, Model CT6845, Model CT6846*
2
, or
Model CT6865*
2
is used
40, 100, 200, 400, 1000, 2000 A f.s.
Measurement
accuracy*
1
±0.65% f.s. (with the lter set at 5 Hz)
±0.85% f.s. (with the lter set at 5 Hz) when Model 9278 or Model 9279 is used.
RMS accuracy*
1
±1% f.s. (DC, 30 Hz to 1 kHz)
±3% f.s. (1 kHz to 10 kHz)
(Sine wave input, with the lter set at 5 Hz, crest factor: 2)
Response time*
1
100 ms (rising from 0% of f.s. to 90% of f.s.)
Temperature
characteristics*
1
±0.075% f.s./°C
Frequency
characteristics*
1
DC to 100 kHz ±3 dB (DC-coupled)
7 Hz to 100 kHz ±3 dB (AC-coupled, at the lower cutoff frequency of 7 Hz ±50%)
Noise*
1
10 mA p-p (max.), with the highest sensitivity range and the terminals of each input
connector connected with each other (for 20 A/2 V range)
Low-pass lter Off, 5 ±50%, 50 ±50%, 500 ±50%, 5 k ±50%, 50 k ±50% (Hz); −3 dB
Input type Unbalanced input (Not isolated)
Input coupling AC/DC/GND
Input resistance 1 M
Ω
±1%
A/D resolution 12 bits
Maximum sampling
rate
1 MS/s
Input terminals Sensor connector HR10A-10R-S (Hirose)
Operating
temperature and
humidity
Consistent with the specications of the Memory HiCorder in which Model 8971 is
installed.
Operating
environment
Consistent with the specications of the Memory HiCorder in which Model 8971 is
installed.
5
Specications