The KAIWEETS ST100 is a multifunction voltage tester designed for various electrical measurements and diagnostics. It is a handheld device with an LCD display and several function keys, making it suitable for both professional and DIY use.

Function Description

The ST100 is capable of performing a wide range of measurements, including:

DC Voltage Test: Measures direct current voltage.
AC Voltage Test: Measures alternating current voltage.
Resistance Test: Measures electrical resistance.
Continuity Test: Checks for the presence of a complete electrical path.
Capacitance Measurement: Measures capacitance.
Frequency Test: Measures the frequency of an AC signal.
Diode Measurement: Tests diodes.
Live Wire Detecting: Identifies live electrical wires.
Non-contact Phase Sequence Detection: Determines the phase sequence of a three-phase system without direct contact.
NCV (Non-Contact Voltage) Measurement: Detects AC voltage without physical contact.
Smart (AUTO) Measurement: Automatically identifies and measures DC voltage, AC voltage, resistance, and continuity.

Important Technical Specifications

General Specifications:

Environment Condition: CAT. III 600V, Pollution level 2, Altitude < 2000m.
Working Temperature and Humidity: 0~40°C (<80% RH, <10°C non-condensing).
Storage Temperature and Humidity: -10~60°C (<70% RH, remove the battery).
Temperature Coefficient: 0.1x accuracy /°C (<18°C or >28°C).
MAX. Voltage between terminals and earth ground: 600V.
Sampling: Approximately 3 times/second.
Display: 4000 counts.
Over Range Indication: "OL".
Low Battery Indication: A battery symbol.
Input Polarity Indication: Display "-".
Power Requirement: 2 x 1.5V AAA batteries.

Accuracy Specifications (within one year after calibration, reference condition: 18°C to 28°C, relative humidity no more than 80%):

DC Voltage Test:

Impedance: Approx. 10MΩ
Measurable Voltage: 0.8V~600V
Ranges & Resolution:
- 4V: 0.001V
- 40V: 0.01V
- 400V: 0.1V
- 600V: 1V
Accuracy: ±(0.5% +3)

AC Voltage Test:

Impedance: Approx. 10MΩ
Frequency Response: 40Hz~1kHz; TRMS
Measurable Voltage: 0.8V~600V
Ranges & Resolution:
- 4V: 0.001V
- 40V: 0.01V
- 400V: 0.1V
- 600V: 1V
Accuracy: ±(0.8%+3)

Resistance Test:

Ranges & Resolution:
- 400Ω: 1Ω
- 40KΩ: 0.01KΩ
- 400KΩ: 0.1KΩ
- 4MΩ: 0.001MΩ
- 40MΩ: 0.01MΩ
Accuracy:
- ±(1.0%+5) for 400Ω, 40KΩ, 400KΩ, 4MΩ
- ±(1.5%+10) for 40MΩ

Capacitance Test:

Ranges & Resolution:
- 40nF: 0.01nF
- 400nF: 0.1nF
- 4µF: 0.001µF
- 40µF: 0.01µF
- 400µF: 0.1µF
- 4mF: 0.001mF
Accuracy: ±(3.0%+5)

Frequency Test:

Ranges & Resolution:
- 40Hz: 0.01Hz
- 400Hz: 0.1Hz
- 4KHz: 0.001KHz
- 40KHz: 0.01KHz
- 400KHz: 0.1KHz
- 4MHz: 0.001MHz
Accuracy: ±(1.0%+3)

Usage Features

Power On/Off:

Press and hold the "U" key for about 2 seconds to turn the device on or off.

Function Selection:

Press the "FUNC" key to cycle through different functions.
Press and hold the "FUNC" key for about 2 seconds to return to NCV measurement mode.
The device defaults to NCV function mode upon power-on.

Data Hold / Flashlight:

Press the "H/*" key to toggle data holding on or off.
Press and hold the "H/*" key for about 2 seconds to turn the flashlight on or off.

Auto Power Off:

The meter automatically shuts down after about 15 minutes of inactivity to save battery energy. A "U" symbol on the display indicates auto power off is enabled.

NCV Measurement:

Press the "U" key to enter NCV measurement mode.
Gradually bring the NCV sensing area close to the conductor.
A weak electric field signal ("---L") will cause a slow buzzer sound and a green light.
A strong electric field signal ("---H") will cause a quick buzzer sound and a red light.

Smart (AUTO) Measurement:

Press the "U" key to power on, then press "FUNC" to select "AUTO" gear. "Auto" will display.
Insert the red probe into the "INPUT" jack and the black probe into the "COM" jack.
Contact the probes with the measured subject or resistance. The meter automatically recognizes and measures DC voltage, AC voltage, resistance, or continuity.
For resistance measurement, if the value is less than about 50Ω, the buzzer will sound.

Diode Measurement:

Press the "U" key to power on, then press "FUNC" to select the diode gear.
Insert the red probe into "INPUT" and the black probe into "COM".
Connect the red probe to the anode and the black probe to the cathode of the diode.
Read the forward bias value. If the probes are inversely connected, "OL" will be displayed, which helps distinguish anode and cathode.

Live Wire Detecting:

Press the "U" key to power on, then press "FUNC" to select "LIVE" gear.
Insert the red probe into "INPUT" and remove the black probe.
Use the red probe to contact the conductor.
Weak signal ("---L") results in a slow buzzer and green light.
Strong signal ("---H") results in a quick buzzer and red light.

Non-contact Phase Sequence Detection:

Press the "U" key to power on, then press "FUNC" to select "PA" symbol.
The letter "A" will flash. Stick the sensing probe to the first phase line and wait for a beep.
"PAB" with "B" flashing will display. Stick the sensing probe to the second phase line and wait for a beep.
"PABC" with "C" flashing will display. Stick the sensing probe to the third phase line and wait for a long beep.
The display will show the detection results: "P---L" for a left-handed phase sequence, "P---R" for a right-handed phase sequence.
Note: Detect all three wires within 1 minute to avoid a detection timeout error.

Maintenance Features

Cleaning:

Turn off the meter and remove the probes.
Wipe the case with a damp cloth or mild detergent.
Do not use abrasives or solvents.
Wipe the contacts in each input socket with a clean swab soaked in alcohol.

Battery Replacement:

Turn off the meter and remove the probes.
Remove the screw fixing the battery cover and then remove the battery cover.
Remove the old battery and replace it with a new one of the same specification (2 x 1.5V AAA batteries), paying attention to the battery polarity.
Install the battery cover back to its original position and secure it with screws.

Kaiweets ST100 - Page 10

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