MR8740T_Quick guide_eng_20191016H.pdf - 第115页
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…
108
Specications of the Options
Effect of radiated
radio-frequency
electromagnetic eld
±10% f.s. (max.) at 3 V/m (with the lter set at 5 Hz)
Effect of conducted
radio-frequency
electromagnetic eld
±10% f.s. (max.) at 3 V (with the lter set at 5 Hz)
Low-pass lter Off, 5 ±30%, 10 ±30%, 100 ±30%, 1 k ±30% (Hz); −3 dB
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.)