13

Accuracy

Noise measurement (FFT processing)

Number of channels

1 channel (Selects one channel from CH1 to CH4)

Measurement item

Voltage/current

Calculation type

RMS spectrum

Measurement

method

500 kHz/s sampling (Decimation after digital anti-aliasing filtering)

FFT processing

word length

32-bit

Number of FFT

points

1,000 points / 5,000 points / 10,000 points / 50,000 points (Linked to the

waveform display record length)

Anti-aliasing filter

Digital filter auto (Variable by the maximum analysis frequency)

Window function

Rectangular / Hanning / flat top

Data update rate

Within about 400 ms to 15 s depending on the number of FFT points, with gap

Maximum analysis

frequency

100kHz / 50kHz / 20kHz / 10kHz / 5kHz / 2kHz

Frequency

resolution

0.2 Hz to 500 Hz (Determined by the number of FFT points and the

maximum analysis frequency)

Noise value

measurement

Calculates the levels and frequencies of voltage and current peaks

(maximum values) for the top 10 points

MOTOR TESTING OPTION (Applicable to the 9791 and 9793)

Number of input

channels

3 channels

CH A: Analog DC input / frequency input (torque signal input)

CH B: Analog DC input / pulse input (rotation signal input)

CH Z: Pulse input (Z-phase signal input)

Input terminal form

Isolation type BNC connector

Input resistance (DC)

1 M Ω ±100 kΩ

Input method

Isolated input and differential input (No isolation between CH B and CH Z)

Measurement item

Voltage, torque, rotation, frequency, slip, motor output

Maximum input

voltage

±20 V (When analog / frequency / pulse)

Maximum rated

voltage to ground

50 V (50/60 Hz), measurement category I 50 V (Expected transient

overvoltage of 500 V)

Accuracy

guarantee period 6 months (One-year accuracy is the accuracy below x 1.5)

1. Analog DC input (CH A / CH B)

Measurement range

±1 V / ±5 V / ±10 V (When analog DC input )

Effective input range

1% to 110%f.s.

Sampling

10 kHz / 16-bit

Measurement

method

Simultaneous digital sampling and zero cross synchronization calculation

method (zero cross averaging)

Synchronization

source

Same as the 3390 power measurement input specification (Common for CH A

and CH B)

Accuracy

±0.1%rdg. ±0.1%f.s.

Temperature

coefficient

±0.03%f.s./°C

Effect of common

mode voltage

±0.01%f.s. or less when applying 50 V (DC 50/60 Hz) between the input

terminal and the 3390 case

Display range

Range’s zero suppress range setting to ±120%

Zero adjustment

Voltage ±10%f.s.

2. Frequency input (only for CH A)

Effective

amplitude range ±5Vpeak

Measurement range

100kHz

Band width

1kHz to 100kHz

Accuracy

±0.05%rdg.±3dgt.

Display range

1.000kHz to 99.999kHz

3. Pulse input (only for CH B)

Detection level

Low: 0.5 V or less, High: 2.0 V or more

Measurement band

1 Hz to 200 kHz (When duty ratio is 50%)

Frequency divider

setting range

1 to 60000

Measurement

frequency range

0.5 Hz to 5.0 kHz (Specified by the frequency at which the measurement

pulse is divided by the set frequency dividing number)

Minimum

detection width

2.5 μs or more

Accuracy

±0.05%rdg. ±3dgt.

4. Pulse input (only for CH Z)

Detection level

Low: 0.5 V or less, High: 2.0 V or more

Measurement band

0.1 Hz to 1 kHz

Minimum

detection width

2.5 μs or more

Setting

OFF / ON (When ON, a frequency divider circuit of CH B is cleared by a rising edge)

D/A OUTPUT OPTION (Applicable to the 9792 and 9793)

Number of output

channels

16 channels

Output content

Switchable between Waveform output / Analog output (selects from the

measurement items) * Waveform output is only for CH 1 to CH 8

Output terminal form

D-sub 25-pin connector × 1

D/A conversion

resolution

16-bit (Polarity + 15-bit)

Output voltage

Analog: DC ±5 Vf.s. (Max. about DC ±12V)

Waveform output: 2 Vrms f.s., crest factor: 2.5 or more

Accuracy

Analog output: Measurement accuracy ±0.2%f.s. (DC level)

Waveform output: Measurement accuracy ±0.5%f.s. (at RMS level, in

synchronization frequency range)

Accuracy

guarantee period 6 months (one-year accuracy is the above accuracy × 1.5)

Output update rate Analog output: 50 ms (As per the data update rate of the selected item)

Waveform output: 500 kHz

Output resistance

100 Ω ±5 Ω

Temperature

coefficient

±0.05%f.s./°C

Display

Display character

English / Japanese / Chinese (simplified characters)

Display

9-inch TFT color LCD display (800 × 480 pixels)

LCD backlight

ON / Auto OFF (1min / 5min / 10min / 30mim / 60min)

Display resolution

99999 counts (Integrated value: 999999 counts)

Display refresh rate 200 ms (Independent of internal data update rate; waveform and FFT

depend on the screen)

Display screen

Measurement, Setting, File Manipulation screens

External interfaces

1. USB Interface (Function)

Connector

Series Mini-B receptacle

Electrical

specification

USB2.0 (Full Speed / High Speed)

Number of ports

1

Class

Vendor specific (USB488h)

Destination

PC (Windows 2000 / XP / Vista (32-bit version))

Function

Data transfer, remote operation, command control

2. USB memory interface

Connector

USB type A connector

Electrical

specification

USB2.0

Power supply

Up to 500 mA

Number of ports

1

Applicable USB

memory

USB Mass Storage Class

Recordable items

Setting file: Save/Load

Measured value/recorded data: Copy (from the CF card data)

Waveform data: Save, screen hard copy

3. LAN interface

Connector

RJ-45 connector × 1

Electrical

specification

IEEE802.3 compliant

Transmission

method

10BASE-T / 100BASE-TX auto recognition

Protocol

TCP/IP

Function

HTTP server (remote operation), dedicated port (port transfer, command control)

4. CF card interface

Slot

TYPE I × 1

Usable card

Compact flash memory card (32 MB or more)

Applicable

memory capacity Up to 2 GB

Data format

MS-DOS format (FAT16 / FAT32)

Recordable

items

Setting file: Save / Load

Measured value / automatically recorded data: Save (in CSV format)

Waveform data: Save, screen hard copy

5. RS-232C interface

Method

RS-232C, EIA RS-232D, CCITT V.24, JIS X5101 compliant

Connector

D-sub 9-pin connector × 1

Destination

Printer / thermometer

Recordable

items

Full duplex asynchronous method

Data length: 8, parity: none, stop bit: 1,

Flow control: Hard flow, delimiter: CR+LF

Baud rate

2400, 9600, 19200, 38400 bps (2400 bps for thermometer)

6. Synchronization control interface

Terminal form

IN-side 9-pin round connector ×1, OUT-side 8-pin round connector x 1

Signal

5 V (CMOS level)

Maximum

allowable input

±20V

Signal delay

Up to 2 μs (Specified by the rising edge)

Functions

1. Setting

Rectification

switching

rms / mean (Selectable for the voltage/current of each connection)

rms: Displays the true RMS value (True RMS)

mean: Displays the average-value rectified RMS value

Auto range

OFF / ON (Voltage and current range is selectable for each connection)

Frequency

Voltage (U) / current (I) / active power(P)

0.5Hz to 30Hz

±0.4%rdg.±0.2%f.s.

30Hz to 400Hz

±0.3%rdg.±0.1%f.s.

400Hz to 1kHz

±0.4%rdg.±0.2%f.s.

1kHz to 5kHz

±1.0%rdg.±0.5%f.s.

5kHz to 10kHz

±2.0%rdg.±1.0%f.s.

10kHz to 13kHz

±5.0%rdg.±1.0%f.s.

* Not specified when the synchronization frequency is 4.3

kHz or more