SPECIFICATIONS
45
Input impedance: About 10MΩ
Display: True RMS
Frequency response: 40Hz~1kHz (
GDM-533
), 40Hz~10kHz
(
GDM-541
)
Accuracy guarantee (
GDM-533
): 2%~100% of 60mV range, 1%~100%
of
other ranges; short circuit allows least significant digit ≤3
Accuracy guarantee (
GDM-541
): 1%~100% of range at
40Hz~1kHz, 10%~100% of range at 1kHz~10kHz; short circuit
allows least significant digit ≤10
The AC crest factor can be ≤3.0 at 3000 counts, an
d can only be
≤1.5 at 6000 counts. The additional error should be added
according to the crest factor of a non-sinusoidal wave as
follows (
GDM-533
):
a) Add 4% when crest factor is 1~2
b) Add 5% when crest factor is 2~2.5
c) Add 7% when crest factor is 2.5~3
The AC crest factor can be ≤2.0 at 10000 counts, and can only be
≤1 at 22000 counts. The additional error should be added
according to the crest factor of a non-sinusoidal wave as
follows (
GDM-541
):
a) Add 4% when crest factor is 1~2
b) Add 5% when crest factor is 2~2.5
c) Add 7% when crest factor is 2.5~3
Frequency measurement range: 40Hz~1kHz (
GDM-533
),
40Hz~10kHz (
GDM-541
); input amplitude: ≥10% of voltage
range Duty ratio is for reference only.
Frequency accuracy: ± (0.1%+4), resolution: 0.1Hz (GDM-533)
Frequency accuracy: ± (0.01%+5), resolution: 0.01Hz (GDM-541)
Max input voltage: 1000V (if the voltage is >1000V, the red
indicator light will be on and the buzzer will sound an alarm; if
the voltage is >1010V, the LCD will display “OL”)
Overload protection: 1000V
