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Hangzhou Zhongchuang Electron Co.,Ltd.
Phone: 0086-571-56770221
Fax: 0086-571-56861355
skype:18767193418
E-mail: sales@east-tester.com
Zip Code: 310015
Address: No.3, Kangle Road, Gongshu District, Hangzhou,Zhejiang,China
ET1255 5½ and ET1240 4½Benchtop Digital Multimeter
Browse through: Date of issue:2019-04-28







ET124X / ET125X is a full-featured, its 3.5-inch large-screen has clear displays of reading, rich content, and a good result of display. It is mains-powered driving which makes it highly reliable. Its comprehensive features, full-range overload protection and unique design make it the first choice for electricians and university laboratories.
In addition, ET124X / ET125X are equipped with the calibration function which allows the user to calibrate according to actual needs and is simple and convenient.
 
Basic features
  • 3.5-inch large-screen display with rich content, clear display of reading, and a good result of display.
  • Dual parameter display: it can display two parameters of the same input signal (for example, with the AC voltage measurements, it can display simultaneously AC voltage and AC frequency value).
  • Measurement speed points: FAST (6 times / second) → MID (4 times / sec) → SLOW (1 times / sec).
  • Duty cycle measurement function
  • Square wave output function
  • Manual / automatic range setting function
  • Communication interfaces: USB Device, RS232
  • Support SCPI protocol and provide programming file
  • AC and DC voltage, DC current, two-wire / four-wire resistance measurement.
  • Cycle and frequency measurement, frequency of up to 20MHz.
  • Capacitance measurement.
  • Provide automatic trigger, external trigger, and single trigger measurements. (External trigger optional for the ET1240 and ET1241 models).
  • Measurement capabilities for current up to 10A and voltage up to 1000V DC.
  • Keypad lock function and system setup; languages, buzzer, screen brightness and so on can be configured according to various needs.
  • Simple external calibration function
  • Variety of mathematical functions: statistics (maximum, minimum), relative measurement, dB, dBm.
  • On-off, diodes, reading hold, data hold / reading, key tone, trigger measurement and so on.
 
 

1. General technical specifications

Power supply voltage: 220V AC±10%, 110V AC ±10%, 45-65Hz.
Working environment: 0~40℃, relative humidity < 80%.
Storage environment: -10~50℃, relative humidity < 80%.
Dsiplay: 3.5-inch, 320 * 480 resolution, 16 M colour TFT LCD.
Dimensions: 265 mm * 105 mm * 305 mm.(width * height * depth).
Weight: 2.3kg.
 
 
Model ET1240 ET1241A ET1255
 
Display screen 3.5” TFT LCD (resolution of 320*480)
Number of display digits 4 1/2 4 1/2 5 1/2
Signal terminal Front end
Fastest measuring speed 7 readings/s 6 readings/s
Function No. Uncertainty, ±(% of reading + least significant digit )
 
DCV
 
Uncertainty 0.05+ 3 0.03+6 0.015+ 3
Measurement range 10 uV~1000 V 1 uV~1000 V 1 uV~1000 V
Maximum resolution 10uV 10uV 1uV
 
 
ACV
Uncertainty 0.8+ 80 0.5+40 0.2+ 100
Measurement range 10 uV~750 V 10 uV~750 V 1 uV~750 V
Maximum resolution 10uV 10uV 1uV
Frequency range 40Hz ~ 1kHz 40Hz ~ 20kHz 40Hz ~ 100kHz
 
DCI
Uncertainty 0.35 +10 0.15+15 0.05 +10
Measurement range 0.01 uA ~ 10 A 0.01 uA ~ 10 A 0.001 uA ~ 10 A
Maximum resolution 0.01uA 0.01uA 0.001uA
 
 
ACI
Uncertainty 0.8+80 0.75+20 0.3+400
Measurement range 0.01 uA ~ 10 A 0.01 uA ~ 10 A 0.001 uA ~ 10 A
Maximum resolution 0.01uA 0.01uA 0.001uA
Frequency range 40Hz ~ 1kHz 40Hz ~20kHz 40 Hz ~ 5kHz
 
Resistance
Uncertainty 0.1+ 20 0.1+5 0.02+ 6
Measurement range 0.01Ω ~20MΩ 0.01Ω ~20MΩ 0.001 Ω ~20MΩ
Maximum resolution 0.01Ω 0.01Ω 0.001Ω
Frequency/cycle Uncertainty 0.2+10 0.2+10 0.1+3
Measurement range 0.01 Hz ~20 MHz 0.01 Hz ~20 MHz 0.001 Hz ~20 MHz
Maximum resolution 0.01Hz 0.01Hz 0.001Hz
 
Capacitance
Uncertainty 7+ 30 6+15 5+5
Measurement range 1 pF ~ 10 mF 1 pF ~ 10 mF 1 pF ~ 10 mF
Maximum resolution 1 11pF 0 1pF 1
1 pF
Mathematical functions: Relative measurement, max/min, dB, dBm, reading hold
Data storage/reading Yes
Interfaces USB device standard, RS232 optional USB Device, RS232
Trigger measurement Yes
Square-wave output Yes
Fast measurement Optional configuration Yes
Resistance 4-line measurement Yes  
External trigger measurement None Yes
AC+DC measurement   Yes
Calibration Yes
On-off/diode Yes
Limit test function Yes
 
 
 
 
Standard accessories:
A set of meter probes, one double-end three-core power cord, one optical disc (standard configuration for ET3255 only), 2 spare power fuses, user’s manual
Optional accessories:
RS232 serial port line, USB cable
 
 
 
 General technical specifications
Display: 3.5” LCD display
Maximum display: 22000 (4 1/2 digit) or 220000 (5 1/2 digit) automatic polarity display and unit display
Range selection: Automatic/manual
Prompt of over-range: “OL” displayed on the display screen
Measurement test: ET-3255: 6 time/s (fast), 4times/s (medium), 1 time/s (slow)
ET-3240 and ET3241: 7 time/s (fast), 4times/s (medium), 2 times/s (slow)
Power voltage: AC 220V±10%, 50HZ
Operating environment: (0-40°C), relative humidity <80%
Storage environment: -10-50℃, relative humidity <80%
Dimensions: 265Mm×105mm×305mm (W×H×D)
Weight: 2.3Kg
 
 

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