| General Specification |
| Model |
IT9121E |
| AC input voltage |
100 VAC - 240 VAC 50 / 60 Hz |
| Warm-up time |
Apporx 30 minutes |
| Operating Environment |
Temperature : 5℃— 40℃
Humidity : 20% RH— 80% RH（No condensation）
Altitude : 2000 m or less 2000 m |
| Storage Environment |
Temperature : -20℃— 50℃
Humidity : 20% RH— 80% RH（No condensation）
Altitude : 2000 m or less 2000 m |
| Installation |
Indoors |
| Safety |
IEC 61010-1, EN 61010-1, Measurement CAT Ⅱ |
| Maximum power consumption |
50 VA |
| Screen Display |
| Detailed Information |
| Display type |
Dimension：4.3-inch color LCD (TFT)
Full screen pixel：480（horizontal）*272（vertical） points
Full screen pixel 480 horizontal *272 vertical
points
Waveform display pixel： 384（horizontal）*194（vertical）points
points
Operating temperature: -20 ~ 70
Storage temperature: -30 ~ 80
Value display matrix display |
| Input |
| Item |
Specifications |
| Input terminal type |
voltage plug-in terminal (safety terminal) |
| Input type |
Current Direct input: large binding post
External current sensor input DB9 connector |
| Input type |
Voltage: Floating input through resistive voltage divider |
| Measure range |
Voltage: 15 V, 30 V, 60 V,150 V, 300 V, 600 V
Current:
Direct input: 5 mA, 10 mA, 20 mA, 50 mA, 100 mA,
200 mA, 0.5 A, 1 A, 2 A, 5 A, 10 A, 20 A
Sensor input: EX1: 50 mV, 100 mV, 200 mV, 500 mV, 1 V, 2 V;
EX2: 2.5 V, 5 V, 10 V |
| Input impedance |
Voltage: Input resistance: Approx. 2 MΩ, input capacitace:
Approx.13 pF (in parallel with the resistance)
current:
Direct input range 5 mA ~ 200 mA:
Input resistance: Appro x 505 mΩ
Input inductance: Appro x 0.1 μH
Direct input range 0.5A ~ 20 A:
Input resistance: Appro x 5 mΩ
Input inductance: Appro x 0.1 μH
Sensor input:
Input resistance:Appro x 100 kΩ 2.5 V ~ 10 V)
Input resistance:Appro x 20 kΩ 50 mV ~ 2 V) |
| Continuous maximum allowable input |
Voltage: peak value of 1.5 kV or RMS value of 1 kV,
whichever is less
Direct input range 5 mA ~ 200 mA:
peak value of 30 A or RMS value of 20 A, whichever is less
Direct input range 0.5 A ~ 20 A:
peak value of 100 A or RMS value of 30 A, whichever is less
Sensor input : Peak value less than or equal to 5 times
of the rated range |
| Instantaneous maximum allowable input (1S) |
Current:
Direct input range 5 mA ~ 200 mA:
peak value of 30 A or RMS value of 20 A, whichever is less
Direct input range 0.5 A ~ 20 A:
peak value of 150A or RMS value of 40 A, whichever is less
Sensor input :
Peak value less than or equal to 10 times of the rated range |
| Input bandwidth |
DC, 0.5 Hz ~ 1 MHz |
| Continuous maximum Common-mode voltage |
600 Vrms, CAT |
| Line filter |
select OFF, cut off frequency of 500 Hz |
| Frequency filter |
select OFF, cut off frequency of 500 Hz |
| Range |
range of each unit can be set separately |
| A/D converter |
Simultaneous conversion voltage an current inputs
Resolution: 18-bit
Maximum conversion rate: 10 μs |
| Voltage And Current Accuracy |
| Requirements |
temperature 23 ± 5 humidity 30~75% RH
Input waveform:
Sine wave crest factor: 3, common-mode voltage: 0 V
Number of displayed digits: 5
digits (6 digits when
including the decimal point)
Frequency filter : Turn on to measure voltage or current
of 200 Hz or 30 minutes after warm-up time has passed
After zero-level compensation or measurement range
is changed |
| Accuracy |
DC: ± (0.1% of reading + 0.2% of range)
0.5 Hz ≤ f 45 Hz ± (0.1 % of reading + 0.2 % of range)
45 Hz ≤ f ≤ 66 Hz ± (0.1 % of reading + 0.2 % of range)
66 Hz f ≤ 1kHz ± (0.1 % of reading + 0.2 % of range)
1 kHz f ≤ 10 kHz ± (0.1 % of reading + 0.2 % of range)
± (0.07 *f) % of reading + 0.3% of range)
10 kHz f ≤ 100 kHz
± (0.5 % of reading + 0.5 % of range) ± [{0.04x(f-10)}%
of reading |
| Active Power Accuracy |
| Requirements |
same as the conditions for voltage and current. Power factor:1 |
| Accuracy |
DC: (0.1 % of reading + 0.2 % of range)
0.5 Hz ≤ f 45 Hz ± (0.3 % of reading + 0.2 % of range)
45 Hz ≤ f ＜ 66 Hz ± (0.1 % of reading + 0.1 % of range)
66 Hz ＜ f ≤ 1kHz ± (0.2 % of reading + 0.2 % of range)
1 kHz ＜ f ≤ 10 kHz
± (0.1 % of reading + 0.3 % of range) ± [{0.067x(f-1)}% of reading]
10 kHz ＜ f ≤ 100 kHz
± (0.5 % of reading + 0.5 % of range) ± [{0.09x(f-10)}% of reading] |
| Influence of power factor |
when power factor (λ)=0 (S:apparent power
± 0.2 % of S for 45 Hz ≤ f ≤ 66 Hz
± {(0.2 + 0.2 × f) % of S } for up to 100 kHz as reference data
f is frequency of input signal in kHz
when 0 < λ < 1 (Φ:phase angle of the Voltage and current)
(power reading )×[(power reading error%)+(power range %)×
(power range/indicated apparent power value)+{tanΦ× (influence when λ=o)%}] |
When the line filter is
turned ON |
45 ~ 66 Hz: Add 0.3 % of reading
< 45 Hz: Add 1 % of reading |
| Temperature coefficient |
Temperature coefficient same as the temperature coefficient for voltage and current |
Accuracy when the
crest factor is set to 6 |
accuracy obtained by doubling the measurement range
error for the accuracy when the crest factor is set to 3 |
Accuracy of apparent
power S |
voltage accuracy +current accuracy |
Accuracy of reactive
power Q |
accuracy of apparent power + (√1.0004 - λ2) - (√1 - λ2)
×100 % |
| Accuracy of power factor λ |
± [(λ-λ/1.0002)+丨cosø-cos{ø+sin-1 (influence
from the power factor when λ = 0%/100)}丨]
±1digit when voltage and current are at the
measurement range rated input |
| Accuracy of phase difference Φ |
± [丨 ø-cos-1(λ/1.0002)丨+sin-1(influence from
the power factor when λ = 0 %/100)]
± 1digit when voltage and current are at the
measurement range rated input |
| Voltage, Current And Power Measurements |
| Item |
Specifications |
| Measurement method |
Digital sampling method |
| Crest factor |
3 or 6 |
| Wiring system |
(one element model): single-phase , two-wire(1 P2 W) |
| Range select |
select manual or auto ranging |
| Item |
Auto range
auto-range decline |