MR8740、MR8741_user_manual_eng_20191016H.pdf - 第374页

17.6 Specifications of Modules 362 Accuracy figures assume installatio n in a Memory HiCorder and operation after a 30-minu te warm-up period at 23  C±5  C (73  F±9  F) and 80% RH (no condensation). 17.6.10 U8974 Hig…

17.6 Specifications of Modules

361

Chapter 17 Specifications

17.6.9 MR8990 Digital Voltmeter Unit

Temperature and humidity

range for guaranteed accuracy

23 ± 5°C (73.4 ± 9.0°F), 20 to 80% RH (when calibration is executed 30 minutes after power on)

Product warranty period 3 years

Period of guaranteed accuracy 1 year

No. of input channels 2 channels

Measurement item DC voltage

Measurement ranges

Measurement accuracy

Temperature characteristic ±(0.002% rdg. + 0.00025% f.s.)/°C

A/D conversion measurement

method

 modulation method

Integration time

NPLC: Settable from 0.1 to 0.9 (in increments of 0.1), 1 to 9 (in increments of 1), and 10 to 100 (in

increments of 10)

Response time Within 2 ms + 2 x integration time (rising –f.s. ¨ +f.s., falling +.f.s. ¨ -f.s.)

Fast response ON/OFF

Common mode rejection ratio 100 dB minimum (at 50/60 Hz and with signal source resistance of 100  maximum)

Input type Unbalanced (floating)

Input terminals Banana jacks

Maximum input voltage 500 VDC

Maximum rated voltage to

earth

300 V AC, DC (between input channels and chassis, and between input channels)

Measurement category II (anticipated transient overvoltage 2500 V)

Operating temperature and

humidity ranges

Same as the host Memory HiCorder

Operating environment Same as the host Memory HiCorder

Storage temperature and hu-

midity ranges

-10°C to 50°C (14°F to 122°F), 80% RH or less (no condensation)

Dimensions Approx. 106 mmW × 19.8 mmH × 196.5 mmD (Approx. 4.17"W × 0.78"H × 7.74"D)

Weight Approx. 260 g (Approx. 9.2 oz.)

Accessories Instruction manual (when shipped alone)

Effect of radiated radio-fre-

quency electromagnetic field

±0.1% f.s. (max) at 3 V/m (in 5 mV/div range)

Applicable standards Safety EN 61010

EMC EN61326 ClassA

Option L2200 Test Lead

* Guaranteed range of measurement accuracy

Measurement Range Effective Input Range

Maximum

Resolution

Input Resistance

5 mV/div (f.s. = 100 mV) -120 mV to 120 mV 0.1 V

100 M or more50 mV/div (f.s. = 1000 mV) -1200 mV to 1200 mV 1 V

500 mV/div (f.s. = 10 V) -12 V to 12 V 10 V

5 V/div (f.s. = 100 V) -120 V to 120 V 100 V

10 M ±5%

50 V/div (f.s. = 1000 V) -500 V to 500 V 1 mV

Measurement Range NPLC: Less Than 1 NPLC: 1 or More

5 mV/div (f.s. = 100 mV) ±0.01% rdg. ±0.015% f.s. ±0.01% rdg. ±0.01% f.s.

50 mV/div (f.s. = 1000 mV)

±0.01% rdg. ±0.0025% f.s.

500 mV/div (f.s. = 10 V)

5 V/div (f.s. = 100 V)

±0.025% rdg. ±0.0025% f.s.

50 V/div (f.s. = 1000 V)

Power Frequency Integration Time

50 Hz 20 ms x NPLC

60 Hz 16.67 ms x NPLC

17.6 Specifications of Modules

362

Accuracy figures assume installation in a Memory HiCorder and operation after a 30-minute warm-up period at 23C±5C

(73F±9F) and 80% RH (no condensation).

17.6.10 U8974 High Voltage Unit

Product warranty period 3 years

Guaranteed accuracy period 1 year

Number of input channels 2 channels

Measurement functions Instantaneous value, r.m.s. value (can be changed for each channel)

Measurement range 200 mV, 500 mV, 1 V, 2 V, 5 V, 10 V, 20 V, 50 V/div (mode DC)

500 mV, 1 V, 2 V, 5 V, 10 V, 20 V, 50 V/div (mode RMS)

Measurement accuracy ±0.25% f.s. (Filter 5 Hz On)

RMS measurement accuracy ±1.5% f.s. (DC, not lower than 30 Hz but lower than 1 kHz, sine waves, response time: slow)

±3% f.s. (not lower than 1 kHz but not higher than 10 kHz , sine waves)

Crest factor: 2 (sine waves, the peak voltage is up to 1000 V)

RMS measurement response

time

Fast: 150 ms (rising from 0% f.s. to 90% f.s.)

Normal: 500 ms (rising from 0% f.s. to 90% f.s.)

Slow: 2.5 s (rising from 0% f.s. to 90% f.s.)

Temperature characteristic ±0.05% f.s./C

Frequency characteristic DC to 100 kHz -3 dB

Noise 30 mV p-p (typ.), 50 mV p-p (max.) (highest sensitivity range, with input shorted)

Common mode rejection ratio 80 dB or more (50 Hz/60 Hz input short-circuited)

Low-pass filter OFF, 5±50%, 50±50%, 500±50%, 5 k±50%, 50 k±50% (Hz) -3 dB

Input type Unbalanced input (floating)

Input coupling DC/GND

Input resistance 4 M±1%

Input capacitance 5 pF or less (at 100 kHz)

A/D resolution 16 bits

Maximum sampling rate 1 MS/s

Input terminals Banana jacks

Maximum input voltage 1000 V DC, 700 V AC

Maximum rated voltage to

earth

1000 V AC, DC measurement category III, 600 V AC, DC measurement category IV

(between individual input channels and enclosure as well as between individual input channels)

Anticipated transient overvoltage: 8000 V

Operating temperature and

humidity

As per Memory HiCorder in which Model U8974 is installed

Operating environment As per Memory HiCorder in which Model U8974 is installed

Storage temperature and

humidity

Temperature -20C to 50C (-4F to 122F)

Humidity not lower than -20C but lower than 40C 80% RH or less

(not lower than -4F but lower than 104F) (no condensation)

not lower than 40C but lower than 45C 60% RH or less

(not lower than 104F but lower than 113F) (no condensation)

not lower than 45C but not higer than 50C 50% RH or less

(not lower than 113F but not higer than 122F) (no condensation)

Dimensions Approx. 106W × 19.8H × 196.5D mm (4.17”W × 0.78”H × 7.74”D)

Mass Approx. 230 g (8.1 oz.)

Effect of radiated

radio-frequency electromag-

netic field

±5% f.s. (max.) at 3 V/m

Effect of conducted

radio-frequency electromag-

netic field

±5% f.s. (max.) at 3 V (500 mV/div range, with 1 V DC input)

Standards Safety EN61010

EMC EN61326 Class A

Options Model L4940 Connection Cable Set (1.5 m)

Model L4935 Alligator Clip Set (mounted on the tips of L4940, CAT IV 600 V, CAT III 1000 V)

Model 9243 Grabber Clip (mounted on the tips of L4940, CAT III 1000 V)

Model L4936 Bus Bar Clip Set (mounted on the tips of L4940, CAT III 600 V)

Model L4937 Magnetic Adapter Set (mounted on the tips of L4940, CAT III 1000 V)

Model L4931 Extension CableSet (to extend the length of L4940, 1.5 m)

Model L4932 Test Pin Set (mounted on the tips of L4940, CAT IV 600 V, CAT III 1000 V)

Model L4934

Small Alligator Clip Set (CAT III 300 V, CAT II 600 V)

* Model L4932 is necessary when using Model L4934.

17.6 Specifications of Modules

363

Chapter 17 Specifications

General Specifications

Specifications of input, output, and measurement

Common specifications

Voltage input

Charge input

17.6.11 U8979 Charge Unit

Operating environment Indoors, Pollution Degree 2, Operating altitude: up to 2000 m (6562 ft.)

Operating temperature and

humidity

0°C to 40°C (32F to 104F), 80% RH or less (no condensation)

Storage temperature and

humidity

-10°C to 50°C (14F to 122F)

For -10°C or higher but lower than 40°C (14F or higher but lower than 104F), 80% RH

or less (no condensation)

For 40°C or higher but lower than 45°C (104F or higher but lower than 113F), 60% RH or

less (no condensation)

For 45°C to 50°C (113F to 122F), 50% RH or less (no condensation)

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.)

Product warranty period 3 years

Guaranteed accuracy period 1 year

Number of output channels 2 channels

Measurement mode Charge, pre-amplifier, voltage (selectable for each channel)

Input type Unbalanced input (floating)

In each channel, the voltage input terminal has the same-potential ground as the charge input ter-

minal.

Common-mode rejection ratio 80 dB or more (at 50 Hz / 60 Hz, a signal source resistance of 100 )

Anti-aliasing filters Cutoff frequency (fc): 20, 40, 80, 200, 400, 800, 2 k, 4 k, 8 k, 20 k, 40 k (Hz)

Switchable between on and off; the instrument automatically chooses a cutoff frequency along with

the sampling rate.

Attenuation property: -66 dB or higher at a cutoff frequency of 1.5 fc

Maximum sampling rate 200 kS/s

A/D resolution 16 bits (± f.s. = ±25,000 data points)

Maximum rated voltage to

earth

30 V AC, 60 V DC

(between each input channel and the enclosure, between any two of input channels)

Anticipated transient overvoltage: 330 V

Measurement range 10, 20, 40, 100, 200, 400 mV f.s., 1, 2, 4, 10, 20, 40 V f.s.

Maximum input voltage 40 V DC

Frequency characteristics DC to 50 kHz -3 dB (DC-coupled)

1 Hz to 50 kHz -3 dB (AC-coupled, lower cutoff frequency: 1 Hz ±50%)

Noise 80 V p-p (typ.), 120 V p-p (max.), with the highest sensitivity range and the terminals of each

input connector connected with each other

Input resistance 1 M±1%

Input capacitance 200 pF or less (at 100 kHz)

Input coupling AC/DC/GND

Input terminals Metallic BNC terminal

Supported detector Charge-output acceleration detector

Measurement sensitivity 0.1 pC/(m/s

) to 10 pC/(m/s

)