Emos EM420B, Owner'S Manual, Page: 3 / 44

3
Overload protection: 250V DC/AC rms
Max. Input Voltage: 200mV
Frequency range: 40Hz – 400Hz
Response: Average, calibrated in rms of sine wave
Resistance
Range Resolution Accuracy
200Ω 0.1Ω ±(1,2%+5)
2kΩ 0.001kΩ
±(1%+5) 20kΩ 0.01kΩ
200kΩ 0.1kΩ
2MΩ 0.001MΩ ±(1,2%+5)
20MΩ 0.01MΩ ±(1,5%+5)
Open circuit Voltage: about 0,25V
Overload Protection: 250V DC/AC rms
Temperature
Range Resolution Accuracy
-20 °C ~1000 °C 1 °C
-20 °C ~0 °C: ±(5%+4)
0 °C ~400 °C: ±(1%+3)
400 °C ~1000 °C: ±(2%+3)
0°F ~1800°F 1°F
0°F ~50°F: ±(5%+4)
50°F ~750°F: ±(1%+3)
750°F ~1800°F: ±(2%+3)
Overload Protection: 250V DC/AC rms
Battery (only EM420A)
Range Resolution Function
1.5V 0.01V
The approx. Voltage of the
battery is shown on the LCD
3V 0.01V
9V 0.01V
Overload Protection: 1,5V and 3V ranges: F 250 mA L 250V fuse
9V range: 250V DC/AC rms
Test current: 1,5V range: about 50mA
3V range: about 30mA
9V range: about 12mA
Capacitance
Range Resolution Accuracy
20nF 0.01 nF ±(8%+10)
200nF 0.1 nF
±(5%+5)
2µF 0.001 µF
20µF 0.01µF
200µF 0.1µF
1000µF 1µF ±(8%+10)
Overload Protection: 200µF and 1000µF ranges: no overload protection
the other ranges: F 250mA L 250V fuse
Open Circuit Voltage: about 0,5V
Overload Protection: 250V DC/AC rms
Transistor h
FE
Test
Range h
FE
Test Current Test Voltage
PNP & NPN 0–1000 Ib ~ 2 µA Vce ~ 1V
Diode and Continuity
Symbol Introduction Remark
The approximate forward vol-
tage drop will be displayed
Open circuit Voltage:
about 1,5V
The built-in buzzer will sound
if the resistance is less than
about 30Ω
Open circuit Voltage:
about 0,5V
Overload Protection: 250V DC/AC rms
For Continuity Test: When the resistance is between 30Ω and 100Ω,
the buzzer may sound or may not sound. When the
resistance is more than 100Ω, the buzzer won´t sound.
OPERATION INTRODUCTION
Measuring Voltage
1. Connect the black test lead to the “COM“ jack and the red test lead to the “INPUT“
jack.
2. Set the range switch to or position. Select auto range or manual range with
the “RANGE“ button.
Operating Temperature: 0 °C to 40 °C, <75%RH
Storage Temperature: -10 °C to 50 °C, <85%RH
Dimensions: 158 × 75 × 35mm
Weight: about 200g (including battery)
Specifications
Accuracy is specified for a period of 1 year after calibration and at 18 °C – 28 °C (64°F-
82°F) with relative humidity <75%. Accuracy specifications take the form of:
+/- (%of R(Number of Lest Significant Digits)
DC Voltage
Range Resolution Accuracy
200mV 0.1mV ±(0,8%+5)
2V 0.001V
±(0,8%+5) 20V 0.01V
200V 0.1V
600V 1V ±(1%+5)
Input Impedance: 10MΩ
Overload protection: 600 V DC/AC rms (200 mV range: 250V DC/AC rms)
Max. Input Voltage: 600 V DC
AC Voltage
Range Resolution Accuracy
2V 0.001V
±(1%+5) 20V 0.01V
200V 0.1V
600V 1V ±(1,2%+5)
Input Impedance: 10MΩ
Frequency range: 40Hz – 400Hz
Overload protection: 600 V DC/AC rms
Response: Average, calibrated in rms of sine wave
Max. Input Voltage: 600 V AC rms
DC Current
Range Resolution Accuracy
200µA 0.1µA
±(1,2%+5)
2000µA 1µA
20mA 0.01mA
200mA 0.1mA
2A 0.001A
±(2%+10)
10A 0.01A
Overload protection: µA and mA ranges: F 250 mA L 250V fuse
2A and 10A ranges: unfused
Max. Input Current: INPUT jack: 200mA; 10A jack: 10A
(for measurements> 5A: duration <15 seconds,
interval >15 minutes)
Voltage drop: 200µA, 20mA and 2A ranges: 20mV
2000µA, 200mA and 10A ranges: 200mV
Maximum voltage in open circuit must be ≤ 250 V
AC Current
Range Resolution Accuracy
200µA 0.1µA
±(1,5%+5)
2000µA 1µA
20mA 0.01mA
200mA 0.1mA
2A 0.001A
±(3%+10)
10A 0.01A
Overload protection: µA and mA ranges: F 250 mA L 250V fuse
2A and 10A ranges: unfused
Max. Input Current: INPUT jack: 200mA; 10A jack: 10A
(for measurements> 5A: duration <15 seconds,
interval >15 minutes)
Voltage drop: 200µA, 20mA and 2A ranges: 20mV
2000µA, 200mA and 10A ranges: 200mV
Frequency range: 40Hz – 400Hz
Response: Average, calibrated in rms of sine wave
Maximum voltage in open circuit must be ≤ 250V
DC current (with clamp, optional – EM420A, B)
Range Resolution Accuracy
meter 200A 0.1mV/0,1A ±(1,2%+5)
meter 1000A 1mV/1A ±(1,2%+5)