SISCO SISCO-ETCR7350 (01) PDF Document

The SISCO SISCO-ETCR7350 Flexible Coil Large Current Clamp Meter is designed and manufactured for field testing of AC large current. It can also be used as a common multimeter to measure AC voltage, DC voltage, resistor, and continuity testing. It is widely used in electric power, communications, meteorology, railway, oil fields, construction, and scientific research. It is especially suitable for dense flat cable areas, transformer grounding core current tests, and industrial environments with serious signal distortion.

The technical specifications for the SISCO SISCO-ETCR7350 are as follows:

Current Range: 0.0A to 6000A

Voltage Range: 0.0V to 600V AC

Power Measurement: Supports power, power factor, energy, frequency, and phase measurements

Coil Diameter: 200mm

Power Supply: 6V DC (LR03 x 4pcs Alkaline dry cells)

Test Method: Flexible CT (Rogowski Coil)

Data Store: 600 groups

Communication Interface: USB interface

Sampling Rate: 2 times per second

Safety precautions for the SISCO SISCO-ETCR7350 include:

Under any circumstance, pay special attention to safety when using this meter.

The communication interface and internal circuit are non-isolated. It is strictly forbidden to connect to a computer when testing voltage, as it will burn the meter or cause an electric shock. The voltage test line must be pulled out before connecting the data line to a computer.

Keep the clamp jaw clean and maintain it regularly.

Do not store the meter in high temperature, high humidity, or dewy places, or under direct sunlight for long periods.

If not using the tester for a long time, please take out the battery to prevent leakage.

Press the POWER key to start up; the LCD will display and enter measurement mode. Press the POWER key again to shut down. If the meter is left without operation for 10 minutes after startup, it will shut down automatically to reduce battery consumption.

Press the MODE key to switch between three different measurement modes: Current/AC voltage, Current/DC voltage, and Current/resistor.

Step 1. Start up the meter and enter measurement mode.

Step 2. Rotate the lock catch according to the OPEN direction as indicated in the structure diagram and unscrew the flexible coil lock catch.

Step 3. Clamp the measured wire with the flexible coil clamp.

Step 4. Rotate the lock catch to the CLOSE direction to lock the flexible coil again.

Step 5. Observe the reading value. Ensure the tested wire is in the central position of the flexible coil as much as possible for accuracy.

If the meter displays the “OL” symbol, it indicates that the measured value exceeds the upper limit range of the SISCO SISCO-ETCR7350.

When the measured current is small, the test resolution can be improved by repeatedly wrapping the flexible coil around the measured wire many times before closing it. For example, if the measured current is 10A and the coil is wrapped 3 times, the meter will show 30A. The actual current is equal to the display value divided by the number of windings.

Step 1. Start up the meter.

Step 2. Press the MODE key to switch to either AC V (AC voltage mode) or DC V (DC voltage mode).

Step 3. Connect the test lines to the meter and the source. The meter will then display the measured voltage value.

Step 1. Start up the meter.

Step 2. Press the MODE key to switch to the RES resistance gear.

Step 3. Connect the test line to the measured resistor and the meter. The SISCO SISCO-ETCR7350 will display the resistance value.

Step 1. Start up the meter and press the MODE key to switch to the RES resistance gear.

Step 2. Press the SET key to turn on the continuity testing function. A specific audio symbol will indicate it is on.

Step 3. Connect to the test line. If the tested resistance value is smaller than 20 ohms, the buzzer will ring to alert you.

Press the HOLD key to hold the current display data; a “HOLD” symbol will appear on the LCD screen. Pressing HOLD again cancels the data hold. The SISCO SISCO-ETCR7350 will automatically number and save the held data. It can store up to 600 groups of data.

In measurement mode, press the MEM key to enter data query mode. The “READ” symbol will be displayed. Data starts from “READ:001”. Use the HOLD key to increase the query number and the MEM key to decrease it. Press the MODE key to return to measurement mode.

In data query mode, press the SET key to enter the delete option. Press the MODE key to switch the cursor between “YES” or “NO”. Select “YES” to delete or “NO” to return to query mode, then press the SET key to confirm your choice.

Step 1. Install the USB driver and upload software on your computer.

Step 2. Connect the SISCO SISCO-ETCR7350 to the computer using the standard communication line.

Step 3. Start up the meter and run the software. Select history query to read, save, report, or print the data. Files can be saved in Txt or Excel format.

When the battery voltage drops to 4.8V, the SISCO SISCO-ETCR7350 will display a low battery symbol to remind you to replace the battery. Using the meter with a low battery may result in a dark LCD display.

Step 1. Press the POWER key to shut down the meter and ensure it is in the off state.

Step 2. Open the battery cover and replace the old batteries with four qualified new 6V DC LR03 Alkaline dry cells, paying close attention to polarity.

Step 3. Close the battery cover properly. The meter cannot be used if the cover plate is not secured.

Step 4. Press the POWER key to confirm the replacement was successful.

The flexible current clamp sensor (Rogowski Coil) is a loop coil uniformly wound on non-ferromagnetic materials. It has no hysteresis effect, almost zero phase error, no magnetic saturation, high linearity, and strong anti-interference ability. The output signal is the differential of current with respect to time, which is integrated to truly restore the input current.

The working environment for the SISCO SISCO-ETCR7350 should be between -10 degrees Celsius and 40 degrees Celsius, with relative humidity below 80 percent. The storage environment should be between -10 degrees Celsius and 60 degrees Celsius, with relative humidity below 70 percent.

After starting up the meter, press the button with the sun/light icon to control the backlight. It is suitable for use in dark sites. Note that the backlight is open by default upon startup.

POWER: Power On/Off control.

HOLD: Used for data hold, saving, and querying.

Sun Icon Key: Controls the On/Off backlight and serves as a delete function key.

MODE: Switches display modes and switch delete options.

MEM: Enters reading, query, and data browsing modes.

SET: Switches display channels, inquiry data pages, and confirms data deletion.

The SISCO SISCO-ETCR7350 has a sampling rate of 2 times per second and features a 2.8 inch TFT colorful screen with a display area of 58mm x 44mm.

The SISCO SISCO-ETCR7350 complies with IEC1010-1, IEC1010-2-032, Pollution 2, CAT VI (1000V), and IEC61326 (EMC standard).

The meter itself weighs 272g, and the total weight including the battery and accessories is 755g.

The SISCO SISCO-ETCR7350 has an insulation resistance of 100M ohms or more at 1000V.

The measured wire should be in the central position of the flexible coil as far as possible (near the center point A). It should not be near the opening and closing point (area C). Test error at the opening and closing point can increase by twice or more, while error near the coil edge (point B) increases by about 1%.

After powering on the meter for about 10 minutes without any operation, the SISCO SISCO-ETCR7350 will shut down automatically to reduce battery consumption.

After the test, clean the clamp head and maintain the meter. If a voltage measurement was performed, the test line should be removed from the tested wire first and then pulled out from the meter to avoid electric shock.

The SISCO SISCO-ETCR7350 features automatic gear shifting.

The working current for the SISCO SISCO-ETCR7350 is 80mA when the backlight is on and 40mA when the backlight is off.

The resistor test interface is located at the bottom of the device, specifically identified as point 6 in the meter structure diagram, adjacent to the voltage and current test interface.

Yes, the SISCO SISCO-ETCR7350 model is specifically noted to support measurements for power, power factor, energy, frequency, and phase.

The communication cable included with the SISCO SISCO-ETCR7350 has a length of 1.8 meters.

1. Flexible coil CT

2. Lock catch (for locking or opening the coil)

3. LCD screen

4. Function keys

5. Voltage and current test interface

6. Resistor test interface

7. Communication interface

8. Pen probe test line

The SISCO SISCO-ETCR7350 automatically supports frequencies of 50Hz and 60Hz.

When measuring voltage, pay close attention to connecting the measurement line to avoid short circuiting the tested circuit. The meter cannot be used to measure voltage lines exceeding 600V, otherwise there is a danger of electric shock and personal injury.

Use, disassembly, and maintenance of the SISCO SISCO-ETCR7350 leakage current meter must be handled by authorized personnel.

When the continuity testing function is activated by pressing the SET key in RES mode, a specific audio-wave symbol will be displayed on the LCD screen to indicate it is on.

The SISCO SISCO-ETCR7350 comes with 2 probe test lines: one red and one black.

If for any reason the instrument becomes dangerous to continue using, it should be stopped and sealed immediately, and then handled by an authorized institution.

The SISCO SISCO-ETCR7350 can measure AC current from 0.0A up to 6000A.

The SISCO SISCO-ETCR7350 can measure AC voltage in the range of 0.0V to 600V.

Once in the data query mode (by pressing MEM), you can use the HOLD key to move forward (increase the entry number) and the MEM key to move backward (decrease the entry number).

No, you should not measure current which exceeds the meter’s upper limit range. If the current is too high, the meter will display “OL”.

Point A represents the central position of the flexible coil. Placing the tested wire near this point ensures the highest measurement accuracy.

The meter cannot perform tests if the battery cover plate is not covered properly. Attempting to do so is dangerous.

No, the frequency detection (50Hz/60Hz) on the SISCO SISCO-ETCR7350 is automatic.

The dimensions (Length x Width x Height) of the SISCO SISCO-ETCR7350 are 200mm x 370mm x 35mm.

Yes, due to its flexible coil, small size, and light weight, it is suitable for narrow environments and flat cable dense places where traditional rigid clamp meters may not fit.