Huazhihui CEMAutomobile multimeter AT-9955

1Can be measured with an induction clamp2-10The engine speed of a car with a cylinder
2、4000Digital LCD display with backlight function
3、14The functions include: DC voltage, AC voltage, DC current, AC current, resistance, speed, cylinder, duty cycle, frequency, temperature, capacitance, short circuit, and diode testing
4Read the pulse duty cycle and electronic fuel injection feedback carburetor closing angle, ignition
5Data retention and relative value function
6Overload warning
7Automatic shutdown
8Fuse current input and all range overload protection
9Test the millisecond pulse width to measure real-time fuel injectors, ineffective air controllers, and electronic transmission controllers

AT-9955It is a professional car digital multimeter with infrared temperature measurement function.

1. Can be measured with an induction clamp2-10The engine speed of a car with a cylinder

2. 6000Digital LCD display with backlight function

3. 14The functions include:DC voltage,AC voltage,direct current,alternating current,resistance,speed,cylinder,duty cycle,frequency,temperature,,capacitance,Short circuit and diode.

4. Data retention and relative value function.

5. Overload warning

6. Auto Shutdown

7. Fuse current input and overload protection across all ranges

DC voltage measurement
Range: 5One,400mV, 4V，40V, 400V，1000V
Basic accuracy: ±(0.5% + 2d)
AC voltage measurement
Range: 5One,400mV, 4V，40V, 400V，700V
Basic accuracy: ±(0.8% + 4d)
DC current measurement
Range: 5One,400uA, 4000uA，40mA, 400mA，4A, 20A
Basic accuracy: ±(1.2% + 2d)
AC current measurement
Range: 5One,400uA, 4000uA，40mA, 400mA，4A, 20A
Basic accuracy: ±(1.5% + 4d)
resistance measurement
Maximum measured resistance:5a,400W,4kW, 40kW, 400kW, 4MW, 40MW
Basic accuracy: ±(0.8% + 3d)
Rotational speed measurement
Maximum measurement: 600～4000RPM; 600～12000RPM(×10RPM)
Basic accuracy: ±(2.0% + 2d)
Cylinder measurement:
Maximum measurement:4CYL, 5CYL, 6CYL,8CYL, 10CYL, 12CYL
Basic accuracy: ±(2.5% + 2d)
Duty cycle measurement
Maximum measurement frequency:0.1～99.9%
Basic accuracy: ±(1.5% + 2d)
frequency measurement:
The maximum measurement frequency is:0.001Hz～9.99MHz
Basic accuracy: ±(2.0% + 2d)
temperature measurement:
Maximum measurement:-20℃~760℃/-4℉~536℉
Basic accuracy: ±(3.0% + 2d)
Infrared temperature measurement:
Maximum measurement:-20℃~280℃/-4℉~1400℉
Basic accuracy: ±(3.0% + 2d)
capacitance measurement:
Maximum measurement: 40nF, 400uF, 4uF, 40uF, 100uF
Basic accuracy: ±(3.0% + 2d)
pulse width:
Maximum measurement:0.1～10mS
Basic accuracy: ±(3.0% + 5d)
Diode and short-circuit testing
When testing diodes, test the current0.3mATypical values; open-circuit voltage1.5V DCTypical values.

Value retention function
Press the value hold function key to lock the value. The numerical retention function key is located on the left side of the table. When the numerical retention function is active, the screen will displayHOLDPress the numerical hold function key again to cancel this function.

Attention:The data retention function is in operation when the backlight is turned on. Press the numerical hold function key again to exit this function
The backlight function is used to illuminate the display screen in low light conditions. Press the backlight button2The backlight function can be turned on in seconds, press this button again1The backlight function can be turned off in seconds.
Range button
This instrument has an automatic range. pressRANGEPress the key to switch to manual range. Press the range key to gradually adjust to the range you need, press and holdRANGEkey2Return to automatic mode in seconds.