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Description

Digital Multimeter VOAC7500H

Digital Multimeters VOAC7523H / 7522H / 7520H / 7521HSpecifications

  *  Accuracy (±X% of reading +Y digits) indicated by X+Y
  The measuring accuracy indicated below can be obtained for a year following the calibration of the instrument.

1. Typical Sample Rate and Resolution
Sample Rate Resolution Reading Rate Hum Rejection
SLOW 5.5-digit approx. 4 times/sec Yes
MID 5.5-digit approx. 20 times/sec Yes
FAST 4.5-digit approx. 100 times/sec N/A

2. DC Volt (DCV)   50mV range is for the VOAC7523H / 7522H only.
Range Resolution Input Resistance Accuracy*
5.5-digit 4.5-digit SLOW/MID FAST
50mV 0.1µV 1µV 100MW or more 0.025+10 0.025+15
500mV 1µV 10µV 1000MW or more 0.012+5 0.012+10
5V 10µV 100µV 0.012+2 0.012+7
50V 100µV 1mV approx. 10MW 0.016+5 0.016+10
500V 1mV 10mV 0.016+2 0.016+7
1000V 10mV 100mV
The accuracy in the 50mV and 500mV ranges is specified after zero compensation through the REL operation.
Sample rate in the 50mV range
SLOW/MID: Approx. 0.5 times/sec, FAST: Approx. 50 times/sec
Max. input voltage: 50mV to 5V range ± 800V (continuous)
50V to 1000V range ± 1100V (continuous)
Resolution and noise rejection
Resolution Sample Rate NMRR CMRR
5.5-digit SLOW 55dB or more 120dB or more
5.5-digit MID 55dB or more 120dB or more
4.5-digit FAST 0dB 55dB or more

3. CH-B DC Volt (DCV)   VOAC7523H / 7520H only
Range Resolution Input Resistance Accuracy*
4.5-digit SLOW/MID FAST
5V 100µV CH-B:H to CH-B:L 10MW ± 3%
CH-B:H to CH-A:L 5MW ± 3%
CH-B:L to CH-A:L 5MW ± 3%		 0.025+2 0.025+30
50V 1mV 0.025+8
300V 10mV 0.025+5
Max. input voltage: ± 300V, between CH-A L and CH-B ± 300V
Resolution and noise rejection
Resolution Sample Rate NMRR CMRR Isolation between CH-A and CH-B
4.5-digit SLOW/MID 55dB or more 120dB or more 56dB or more
4.5-digit FAST 0dB 55dB or more

4. AC Volt (ACV, DC+ACV) detection of True RMS
     Up to 100kHz for VOAC7521H / 7520H
Range Resolution Measurement Range Input Resistance
5.5-digit SLOW MID/FAST
500mV 1µV 15Hz to 300kHz 200Hz to 300kHz less than approx.
1MW // 100pF
5V 10µV
50V 100µV
500V 1mV 45Hz to 100kHz 200Hz to 100kHz
750V 10mV 45Hz to 20kHz 200Hz to 20kHz
Accuracy: SLOW Sample (Sine wave Amplitude at 5% to 100% of fullscale of range)
Frequency Accuracy*
15Hz to 45Hz 0.5+150
45Hz to 100Hz 0.25+150
100Hz to 30kHz 0.2+150
30kHz to 100kHz 0.5+300
100kHz to 300kHz 2.5+1000
Coefficient to input other than sine wave
Crest Factor Crest Factor
1 to 1.5 1.5 to 2 2 to 3
15Hz to 30kHz 0.05% 0.15% 0.30%
30kHz to 300kHz 0.20% - -
Resnponse time
Sample Rate Resolution Reading Rate Response Time
SLOW 5.5-digit 4 times/sec less than 3 sec
MID/FAST 5.5-digit 20 times/sec less than 2 sec
Max. input voltage: 780Vrms, ± 1100V DC (continuous)
In the case of DC+ACV, 500 (less than 45Hz) or 300 (45Hz or higher) must be added to the value of Accuracy digit in above.
Sample rate of FAST becomes the same values as MID (approx. 20 times/sec).

5. DC Current (DCA)
Range Resolution Accuracy* Input Resistance
5.5-digit 4.5-digit SLOW/MID FAST
5mA 10nA 100nA 0.05+7 0.05+17 150W or less
50mA 100nA 1µA 15W or less
500mA 1µA 10µA 2W or less
10A 100µA 1mA 0.2+7 0.2+17 0.1W or less
Auto range is not available between 5mA to 500mA range and 10A range because of using different input terminals.
Max. input current: 500mA at 5mA to 500mA ranges (FUSE 0.5A/250V)
10A at 10A range (FUSE 15A/250V)

6. AC Current (ACA, DC+ACA)
Range Resolution Measurement Range Input Resistance
5.5-digit SLOW/MID FAST
5mA 10nA 15Hz to 5kHz 200Hz to 5kHz 150W or less
50mA 100nA 15W or less
500mA 1µA 45Hz to 5kHz 2W or less
10A 100µA 0.1W or less
Accuracy: SLOW Sample (Sine wave) amplitude at 5% to 100% of fullscale (10% to 100% for10A range)
Frequency Accuracy* Crest Factor
1 to 1.5 1.5 to 2 2 to 3
15Hz to 45Hz 1+200 0.05% 0.15% 0.30%
45Hz to 1kHz 0.4+200
1kHz to 5kHz 5.0+200
Response time
Sample Rate Resolution Reading Range Response time
SLOW 5.5-digit 4 times/sec less than 3 sec
MID/FAST 5.5-digit 20 times/sec less than 2 sec
Max. input current: 500mA for 5mA to 500mA ranges (FUSE 0.5A)
10A for 10A range (FUSE 15A)
DC Component on input current must be included in the Max. input current.
In the case of 10A range at 45Hz to 1kHz, 0.3 must be added to %.
In the case of DC+ACA, 500 (less than 45Hz) or 300 (45Hz or higher) must be added to the value of Accuracy in above.
Sample rate of FAST becomes the same value as MID (approx. 20 times/sec).

7. Resistance (2 WireW/4 WireW)   4 WireW: VOAC7522H / 7521H only
Range Resolution Accuracy* Test Current
SLOW/MID FAST SLOW/MID FAST
50W 0.1mW 1mW 0.025+10 0.025+15 approx. 10mA
500W 1mW 10mW 0.014+3 0.014+8 approx. 10mA
5kW 10mW 0.1W approx. 1mA
50kW 0.1W 1W approx. 100µA
500kW 1W 10W 0.015+3 0.015+33 approx. 10µA
5MW 10W 10W 0.033+30 0.033+30 approx. 1µA
50MW 100W 100W 0.25+30 0.25+30 approx. 100nA
500MW 1kW 1kW 1.5+50 1.5+50 approx. 10nA
Max. input voltage: ± 500V peak Open circuit test voltage: 12V or less
The accuracy at 50W to 5kW range are specified after zero compensation through the REL operation.
Sample rate of FAST at 5MW to 500MW range becomes the same value as MID (approx. 20 times/sec).

8. Low-Power Resistance (2 WireW)
Range Resolution Accuracy* Test Current
SLOW/MID/FAST SLOW/MID FAST
500W 10mW 0.1+5 0.1+15 approx. 1mA
5kW 0.1W approx. 100µA
50kW 1W approx. 10µA
500kW 10W 0.2+30 0.2+40 approx. 1µA
5MW 100W 0.2+30 approx. 100nA
50MW 1kW 1.5+30 1.5+30 approx. 10nA
Max. input voltage: ± 500V peak Open circuit test voltage: 12V or less
The accuracy at 500W to 5kW range are specified after zero compensation through the REL operation.
Sample rate of FAST at 5MW to 500MW range becomes the same value as MID (approx. 20 times/sec).
Indications are in 4.5 digits for SLOW, MID, and FAST.

9. Diode
Test Current Measurement Range Accuracy* Open Circuit Test Voltave Max. Input Voltave
approx. 1mA or 10mA 0.1mV to 5.0999V 0.014+13 12V or less ± 500V peak

10. Temperature
Thermocouple Temperature Range to be Measured Accuracy* Resolution Max. Input Voltave
R -50°C to 0°C 0.2+70 0.1°C ± 500V peak
0°C to +100°C 0.2+50
+100°C to +1768°C 0.2+30
K(CA) -200°C to -100°C 0.15+50
-100°C to 0°C 0.15+35
0°C to +1372°C 0.15+20
T(CC) -200°C to -100°C 0.15+50
-100°C to 0°C 0.15+35
0°C to +400°C 0.15+20
J(IC) -200°C to -100°C 0.15+50
-100°C to 0°C 0.15+35
0°C to +1200°C 0.15+20
E(CRC) -200°C to -100°C 0.15+50
-100°C to 0°C 0.15+35
0°C to +1000°C 0.15+20

The above accuracy values do not include the thermocouple accuracy.
±0.1°C/°C is added (for all thermocouples) with the operating ambient temperature of this product at 0°C to 18°C and 28°C to 50°C.
accuracy is not specified. In the temperature range to be measured at -200°C or lower,
The reference thermo electric force is calculated by the "broken line approximation" according to JIS C 1602-1995.
If this product and the thermocouple are connected via a plug, an error for contact temperature compensation is added.

11. Frequency (AC couple, Crest Factor: less than 3)
Sample Rate Reading Rate
(Gate time)		 Display Digits and Measurement Range Accuracy*
SLOW approx. 0.5 times/sec (1s) 6-digit 15.0000Hz to 1.00000MHz 0.02+2
MID approx. 4 times/sec (100ms) 5-digit 15.000Hz to 1.0000MHz
FAST approx. 10 times/sec (10ms) 4-digit 150.00Hz to 1.000MHz

AC couple: Crest factor <=3

AUTO range of ACV must be used with input attenuator.
Max. input voltage: 780 Vrms, ± 1100V peak

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