17.6 Input Modules Specifications
308
17.6.5 8970 Freq Unit
Temperature and humidity range
for guaranteed accuracy
23 ± 5°C (73 ± 9F°), 20 to 80% RH
Measurement functions Based on voltage input, measures frequency, rotation speed, power frequency, integral values,
pulse duty ratio, and pulse width.
Connection terminal Insulated BNC terminal
Input resistance 1 MΩ±1%
Input capacitance 30pF±10pF
Maximum input voltage 400 VDC
Maximum rated voltage to earth 300 VAC, DC (Measurement category II), anticipated transient overvoltage 2500 V (between each
input channel and main unit, and between input channels)
Isolation resistance
Dielectric strength
DC2.704 kVAC for 15 seconds (between input module and main unit, and between input modules),
100 MΩ and over/500 V
Input type Unbalanced (input isolated from output)
Guaranteed accuracy period 1 year
Frequency mode
Measurement ranges 1, 5, 10, 50, 100, 500, 1k, 5 kHz/div (f.s.=20div)
Measurement accuracy ±0.1%f.s. (except for 5 kHz/div range) ±0.7%f.s.(5 kHz/div range)
Measurement ranges DC to 100 kHz (min. pulse width 2 μs)
Rotation speed mode
Measurement ranges 100, 500, 1k, 5k, 10k, 50k, 100 kr/min /div (f.s.=20div)
Measurement accuracy ±0.1%f.s. (except for 100 kr/min range) ±0.7%f.s.(100 kr/min range)
Measurement ranges 0 to 2 kr/min (min. pulse width 2 μs)
Power frequency mode
Measurement ranges 50 Hz (40 to 60 Hz), 60 Hz (50 to 70 Hz), 400 Hz (390 to 410 Hz) (f.s.=20div)
Measurement accuracy ±0.03 Hz (50 Hz, 60 Hz) ±0.1 Hz (400 Hz)
Integral values mode
Measurement ranges 2k, 10k ,20k ,100k ,200k ,1M counts/div
Measurement accuracy ±range/2000
Measurement ranges DC to 100 kHz (min. pulse width 2 μs)
Pulse duty ratio mode
Measurement ranges 5%/div (f.s.=20div)
Measurement accuracy ±1% (10 to 10 kHz) ±4% (10k to 100 kHz)
Measurement ranges 10 to 100 kHz (min. pulse width 2 μs)
Pulse width mode
Measurement ranges 500μ, 1m, 5m, 10m, 50m, 100 ms/div (f.s.=20div)
Measurement accuracy ±0.1%f.s.
Measurement ranges 2 μ to 2 s
Measurement resolution Integral values mode: 2000LSB/DIV (f.s.=20 DIV)
Power frequency mode: 100LSB/DIV (f.s.=20 DIV)
Except for Integral values mode and Power frequency mode: 500LSB/DIV (f.s.=20 DIV)
Response time Less than 40 μs + sampling interval of instrument in which the device is installed.
Input voltage range ±10 V, ±20 V, ±50 V, ±100 V, ±200 V, ±400 V
Threshold value ±10 V range : -10 to +10 V variable (0.1 V steps), ±20 V range: -20 to +20 V variable (0.2 V steps),
±50 V range : -50 to +50 V variable (0.5 V steps), ±100 V range: -100 to +100 V variable (1 V steps),
±200 V range: -200 to +200 V variable (2 V steps), ±400 V range: -400 to +400 V variable (5 V
steps)
Slope Rising, falling (Frequency, Rotation speed, Power frequency, Integral values mode)
Level High, Low (Duty ratio, Pulse width mode)
Hold Frequency mode/ Rotation speed mode: ON/OFF (1 Hz, 0.5 Hz, 0.2 Hz, 0.1 Hz)
:When OFF is selected and the next measurement value is not determined within the waiting time
period, the frequency or the rotation speed will be determined using the value which is calculated
based on the time period between the timing of the last measurement and the timing of the sampling.
Put it to 0 when the measurement value is below the fixed value.
Smoothing OFF, ON* (Frequency mode,Rotation speed mode)
*:The permissible smoothing frequency is up to 10 kHz.
Low-pass filter OFF, 5, 50, 500, 5k, 50 kHz
Input Coupling DC, AC (Low frequency cut-off in AC-coupled mode : 7 Hz)
Frequency dividing function Setting range: 1 to 4096, by one step (Frequency ,Rotation speed ,Integral values mode)
Integration start timing Start, Trigger (Integral values mode)
Integration limit Hold, Loop (Integral values mode)
Operating temperature and hu-
midity ranges
Same as the Memory HiCorder in which the 8970 is installed
To Next Page
Loading...