Crown CT44053 - Page 2

English
1
English
2
Table of contents
1. Product Description
2. Safety Precaution
2-1: Safety specification
2-2: Precautions
3. Symbols on Panel
4. Specification
4-1. Specification
4-2.
Other Features
5. Operating Instruction
5-1. AC Current Measurement
5-2. AC and DC Voltage Measurement
5-3. Resistance Measurement
5-4. Diode & Continuity Check
5-5. NCV Function
6. Maintenance
7. Accessories
1. Product Description

AC Current measurement range for CT44053 (1999digits) is: 0.1A — 600A

The maximum measuring distance of clamp jaws is:25mm
 Automatic range


Display screen：3 1/2 digit (1999 count) LCD display
 Non-Contact Voltage (NCV) detection
 600V input voltage protection
 Auto Power-OFF
 HOLD function
 MAX value’s hold function

Over load indication：“OL” symbol displayed when exceeding the measuring range

Low battery indication：Display “ ”symbol

Power supply： 3V AAA Type 2 pc
 Dimension & Wight： approx. 183（L）x 47（W）x 25（H） & approx. 165g（Include Battery）
2. Safety Precaution
2-1 : Safety specification
All series products are designed to meet international safety standard. IEC61010-1,
IEC61010-031:2002 & IEC61010-2-032 Measurement Category (CAT.) II 600V.
2-2: Precautions
 Do not using instrument on a circuit in which voltage over AC 600V.



Do not using instrument in the presence of flammable gasses.
 Working condition of the instr
ument is: less than 2000m high,

Operating temperature is between 0℃ and 40℃.
3. Symbols on Panel
1. Clamp
2. NCV indicator (red LED)
3. Rotary switch, used to choose the range.
4. “Hold” button, used to keep the readings.
Press the button to enter into the data hold mode
and press again to cancel it.Press this key for 2
5. “MAX” button
6. “FUNC” button, used to shift and
then choose the certain function for it
contains more than one function.
7. Trigger , used to open and close the clamp
8. LED screen
9. I
nput terminal for voltage, resistor,
diode, temperature, capacitance and frequency.
10.“COM” input terminal
11.NCV induced area
4. Specification
4-1. Specification
FUNCTION
RANGE
Max.
Resolution
ACCURACY
ACA
2A
20A
1mA
±(3%rdg+5dgt)
±(2%rdg+5dgt)
400A/600A
0.1A
±(2%rdg+5dgt)
ACV
2V/20V/200V/600V
1mV
±(1.2%rdg+5dgt)
DCV 200mV/2V/20V/200V/600V 0.1mV ±(0.8%rdg+5dgt)
Resistance
200/2K/20K/200K/2M/20M
0.1Ω
±(1.2%rdg+5dgt)
Diode
Open voltage:1.999V
Cotinuity When the resistance value less than 50Ω, the buzzer is sound.
*The accuracy of current is guaranteed when the current is more than 1A.
*The input resistance impedance of voltage is 10MΩ.
4-2. Other Features
 Operating temperature：0℃ to 40℃ & <75%RH & humidity
 Storage temperature : -10℃ to 50℃ & <80%RH & humidity

Auto power off: It will automatically turn off after 15 minutes no operation to conserve the
10
6
1
2
3
4
5
8
9
7
11

Backlight and tong head lighting
Please do not use the stylus if it has cracks or exposed metal parts.
In case of crash during use, just shut down the power supply and restart the machine.
seconds to turn on the illumination backlight, and
press it again for 2 seconds to turn off the
illumination backlight.
energy.
This meter has the function of RMS and the frequency response range is ≤2KHz