8 best drok generators

Product description

DROK Variable PWM & Pulse Function Signal Generator



Parameter:

Working Voltage: DC 3.3-30V, with anti-reverse protection.

Frequency range: 1Hz~150KHz, accuracy about 1%.

Duty cycle range: 0-100%, 1% stepping.

Number of pulses: 1-9999, or infinite (display '----'stands for infinity).

Delay output time: 0.000s-9999s, the minimum can be set 1ms.

positive and negative pulse width length: 0.000s-9999s, the minimum can be set 1ms.

signal loading capacity:less than 30mA.

Output signal amplitude: amplitude is equal to the supply voltage.

Size:79mm*43mm*30mm



Dual Modes:

PWM mode - frequency (continuous), duty cycle. Note that the number of pulses cannot be set in this mode, and the pulse is always sent;

PULSE mode - positive pulse width time, negative pulse width time, delay start time, and number of pulses are adjustable.



Package Includes:

1x PWM Pulse Generator

• PARAMETER --- working voltage DC 3.3-30V; frequency range 1Hz-150kHz; duty ratio range 0-100%; number of pulse 1-9999 or infinite; delay output time 0.000s-9999s.
• DUAL MODE --- the signal generator has 2 modes, PWM mode (default) & pulse mode.
• APPLICATION --- the signal generator module can be used to generate square wave rectangular wave signals for controlling DC motors or stepper motor driver; for servo motors, stepper motors, electric jaws, PLC pulses replacement, etc.
• PROTECTION --- with anti-reverse protection, 5.08mm terminal wiring.
• EASY TO OPERATE --- the signal generator can control start or stop, it can also connect the external switch to control the output signal ON/OFF.

• AMP & VOLT DUAL SIGNAL GENERATOR: Multifunctional DROK signal generator kit is able to generate ampere & voltage by one module, which generate 0/4 - 20mA current signal and 0-10V voltage signal just by rotating a multi-cycle precise potentiometer, simple and handy.
• CLEAR LED DISPLAY: Our 4-20ma signal generator has bright and clear 3-digit LED digital display screen, which can be used to monitor the output current and voltage. You just need to push the switch below the monitor easy to switch the display.
• AMP & VOLT DISPLAY CALIBRATION: There are current and voltage display calibrating potentiometer on the back of the module. If the display is accurate, you can calibrate the display value of current voltage by yourself.
• WIDE APPLICATION: Our signal adapter can be used as signal generator, valve adjustment, inverter control, PLC debugging, panel debugging, LED testing, simulating the output of transmitter.

User questions & answers

Question:	I can see there are connections available for 0 V. What are those for
Answer:	The one next to the 24vdc power input is for the negative - DC power connection. The other is the negative terminal for the 4-20ma and 0-10vdc output.
Question:	how long will it run on 2 9 volt batteries
Answer:	That will depend very much on the use you make of it; we have used the same batteries for several weeks now, but the use is intermittent and for testing or commissioning only.
Question:	Will this work connected to a 9v battery, or do you have to buy a dc supply
Answer:	I had to use 2 9v batteries in series to get it to output 10 volts. With one battery the maximum output only reached 8 volts.
Question:	When providing power to this product, what is the input voltage? does it accept a vdc voltage range
Answer:	The input voltage to this device is 24VDC, and have an analog output 0-10Vdc or 0-20mA. Works really good.

Product features

PRODUCT SPECIFICATIONS

Product Parameters:

Working voltage: DC24V

Input signal: Potentiometer

Output signal: 0/4-20mA or 0-10V

Display accuracy: Current: 0.1mA; Voltage: 0.01V

Dimension: 100*68*38mm

Package Includes:

1* Signal Generator

WIRING INSTRUCTION

"24V" --- Power Supply +

"0V" --- Power Supply -

"0V" --- Signal Output -

"0-20mA" --- Current Output +

"0-10V" --- Voltage Output +

DEBUGGING PROCEDURES

A. Current display calibration

Clockwise rotating the multi-cycle potentiometer to the maximum, switching the display switch to the right and then using a multimeter to test the actual value of the output current. At this time, you can adjust the current display adjusting potentiometer to make the display value equal to the actual output value.

B. Voltage display calibration

Clockwise rotating the multi-cycle potentiometer to the maximum, switching the display switch to the left and then using a multimeter to test the actual value of the output voltage. At this time, you can adjust the voltage display adjusting potentiometer to make the display value equal to the actual output value.

• USB 3-in-1 Converter Meter PWM Generator --- PER Mode: Used as a USB buck boost converter with constant voltage and current function, input voltage range DC 3.5-15V, output voltage range DC 0.60-30.00V, output current range 0.000A-2.000A, max output power 15W.
• USB 3-in-1 Converter Meter PWM Generator --- VAH Mode: Used as a multimeter to measure and display voltage, current, power, capacity, energy, time and temp, detect fast charge protocol. Input voltage range DC 3.0-15V, volt measurement range DC 0.00-50.00V, amp measurement range 0.00-3.000A.
• USB 3-in-1 Converter Meter PWM Generator --- PWM Mode: Output PWM signal, adjustable frequency, duty ratio, amplitude.
• USB Buck Boost Converter --- Parameters: Input voltage range DC 3.5-15V, output voltage range DC 0.6-30V, output current range 0-2A, output power 15W. Temperature: Can measure the ambient temperature and the surface temperature of external objects. ℃ and ℉ can be switched easily.
• Fast Charge Activate Function --- Both items support fast charging protocol QC2.0/QC3.0, HUAWEI FCP/SCP, Samsung AFC.

Product description

DROK Function Generator



Parameter:

Working voltage: DC 3.3V-30V

Frequency range: normal mode 1Hz-150kHz; accurate mode 1Hz-15kHz

Frequency accuracy: 2% in each range

Signal load capacity: output current about 5-30mA

Output amplitude: PWM amplitude equals to input voltage value

Working temperature: -20℃~+70℃

Duty cycle range: 0-100%



Features:

With 2 modes.

Operated by code potentiometer.

With lock function to avoid misoperation.

Duty cycle upper and lower bounds is adjustable.



2 Modes:

Normal mode:

Frequency range 1Hz-150kHz, duty cycle 000-100%, duty cycle step 1%

Accurate mode:

Frequency range 1Hz-15kHz, duty cycle 00.0-100%, duty cycle step 0.1%



Application:

As square wave signal generator for experimental development;

As square wave signal generator for motor driver;

As adjustable pulse generator for MCU;

As pulse generator, control related circuits (PWM dimming, speed regulating).



Frequency Display Instruction:

The frequency is divided into 4 ranges and switched automatically.

1. XXX: minimum unit 1Hz, value range 1Hz~999Hz.

2. X.XX: minimum unit 0.01kHz, value range 1.00kHz~9.99kHz.

3. XX.X: minimum unit 0.1kHz; value range 10.0kHz~99.9kHz.

4. X.X.X: minimum unit 1kHz; value range 1kHz~150kHz.

e.g. Frequency displays 100 represents 100Hz; displays 1.01 represents 1.01kHz;

                      displays 54.1 represents 54.1kHz; displays 1.2.4 represents 124kHz



Package Included:

1x Function Signal Generator

• PARAMETER --- working voltage range 3.3V-30V; frequency range 1Hz-150kHz/1Hz-15kHz; output current 5-30mA; frequency accuracy 2% in each range.
• APPLICATION --- as square wave signal generator for experimental development; as square wave signal generator for motor driver; as adjustable pulse generator for MCU; as adjustable pulse generator for PWM dimming, speed regulating, etc.
• DISPLAY--- clear LCD displays frequency & duty ratio value.
• MODE --- 2 modes, normal mode & accurate mode.
• FEATURE --- with lock function; PWM output, can set frequency & duty cycle separately; duty cycle upper and lower bounds adjustable; support serial communication; all data auto saved after setting.

User questions & answers

Question:	Serial communication was specified in the specs. But no additional information is provided on how to connect Serial to the module
Answer:	The model I bought (XY-PWM1) does not support serial communications; but there was a model available that did have that feature in the specification. I did not buy that model.
Question:	Will it still work at 3.0V input/output? If not, do you have another similar product that will
Answer:	Not sure what you are trying to do; but, the unit does work as advertised. The controls are "multi-function" meaning that they have multiple purposes. I found the unit difficult to use and frustrating, so I don't use it anymore. I bough a commercial unit that cost about $150.
Question:	how do you keep the control on frequency instead of keeping defaulting to duty cycle setting? It is very difficult to control frequency due to this
Answer:	This is not the pulse generator you are looking for. This is a fixed frequency, varible width PEM generator. I think what you are looking for is something like this:"Radio Control Servo ESC Consistency Digital Tester 1-4S for Speed Controller" or "Electronic Speed Controller Servo Tester ESC for RC Airplane Helicopters" Both on EBAA
Question:	Will this work as a 7.83 hz (schumann resonance) generator to infuence ambient room frequency....or does this have totally unrelated applications
Answer:	First off I know nothing about the application that you are interested in using this for. That being said this unit doesn't have the ability to dial down to .83 hz only whole numbers. The output is DC square wave. Hope this helps.

Product description

Parameters: Working Voltage: 80 260VAC Measuring Range: 80 260VAC Rated Power: 100A/22000W Operating Frequency: 45-65Hz Measuring Accuracy: 1. 0 grade Test range and display format: Power Range: 0 22kW within 1kW, display 0. 0 999. 9W; within 1kW 10kW, display 1000 9999W; 10kW and above, display 10. 0 22. 0kW. Energy Range: 0 9999kWh within 10KWh, display 0 9999Wh; 10kWh and above, display 10 9999kWh. Voltage Range: 80 260V(display 80 260V) Current Range: 0 100A(display 0. 00 99. 99A) Note: This module is suitable for indoor, please do not use outdoor. Applied load should not exceed the rated power. Wiring order can't be wrong. Packing Includes: 1x AC Power Multimeter

User questions & answers

Question:	I want to measure the power of a pool heat pump using 240 ac in us measurements. do i take both legs (using 2 meters) and combine the readings
Answer:	I have a dozen of these in various electrical loads in my plant, they run 24x7 and are over 1 year old, no problems.
Question:	Does this include wiring requirments. the q and a make it seem as this is just the lcd for an remote unit
Answer:	You say you want to read the wattage on a 240 vac circuit. If you literally mean one circuit, like an air conditioner or electric range, then this is easily done. Connect the meter voltage input to the 240 volt supply and run one of the wires feeding your 240 vac load through the current transformer (CT). If the appliance also contains 120 vac loads, like a fan for instance, then you will see different readings depending on which of the 240 vac lines you pass through the CT, i.e., on one side you will only see the 240 vac load (such as a compressor) and on the other you'll see both the 120 vac and 240 vac load (compressor and fan).If you're talking about measuring the total current drawn by all household circuits (USA Service with 120 vac and 240 vac) then no, this will not give a true reading. Let's call the 120 vac circuits phase A (Black) and phase B (Red). If you mount the CT on the BLACK side, you'll read all the currents being drawn by the 120 vac loads on phase A PLUS the current being drawn by the 240 vac loads. If you mount the CT on the RED side, you'll read all the currents being drawn by the 120 vac loads on phase B PLUS the current being drawn by the 240 vac loads. If your desire is to measure only current drawn by the 240 vac loads, then this won't work because you'll also see current being drawn by the 120 vac loads. A possible work around would be to pass all of your 240 vac load lines (either all phase A or all phase B) through the CT. For example, suppose you want the total load for an electric oven, an air conditioner and a well pump. Find the wire leaving the breaker for phase A (or B, but don't mix) for each of those and pass them through the current transformer. This should give you an approximation of what those loads draw, but there may be some errors due to the power factors of the appliances.
Question:	Can this meter run for long periods of time when connected to a 7000 watt generator
Answer:	Dear customer, The cut-out size is 76*39mm. Here is pdf manual, https://images-na.ssl-images-amazon.com/images/I/71dzU96Kp9L.pdf Best regards, DROK
Question:	I would like to read wattage on a 240vac circuit, which in usa is two 120vac legs that are 180 degrees out of phase. Is there any easy way with 1 CT
Answer:	Dear customer, For now, there is no 200 amps model. Best regards.

• 6-IN-1 MULTIMETER --- detect and display voltage, current, active power, battery electric energy, power frequency and power factor on one interface.
• MEASUREMENT RANGE --- voltage AC 80.0-300.0V; current 0-100A; power 0-30000W; Electric energy 0-99999kwh; frequency 45.0Hz-65.0Hz; power factor 0.00-1.00PF.
• DISPLAY --- digital LCD color display.
• DATA AUTO STORAGE --- when power off, the electric energy data will be stored and memorized automatically, can be reset.
• NOTE --- this meter can only be used for measuring 50-60Hz pure AC city electricity, it will be damaged if used to measure square wave, inverter output or modified sine wave circuit.

User questions & answers

Question:	What are the panel cutout dimensions? seller only provides the bezel dimension for the width as 79mm. i need to know the cutout dimensions
Answer:	Up to 100 amps
Question:	Are 200amp models available
Answer:	This meter does not have any kind of data output. There are only four "input" terminals. Two are for 120 volts AC and two are for a toroidal current transformer that is supplied with the unit. One wire of the 120 volt AC load (preferably the hot lead) goes through the center of the toroid current transformer. Hope this helps.
Question:	What are mAmps of CT sensor
Answer:	Those are the correct cables. After, you connect it all, it has to be calibrated.
Question:	Does this meter have an output that can be wired to a data logger for recording measurements over time
Answer:	No not weather proof will need an enclosure rated for your install environment.

Product features

Clear Color LCD Display

• 52*26mm color LCD screen.
• Display voltage, current, active power and electric quantity values simultaneously.
• All data will be clear at a glance.

Power Energy Clear Key

• When power off, the electric energy data will be stored automatically.
• The accumulated electric energy can be cleared by the button above.
• Clear method: Hold press the button for 5 seconds, and the accumulated electric energy will be cleared.

Current Transformer

• Comes with a 100A CT.
• CT Inner Diameter: 15.5mm
• CT Outer Diameter: 27mm
• Note: Please use the attached CT to measure, otherwise the measured value may be inaccurate.

• USB Intelligent Electronic Load --- a electronic load, also can used to detect and test the QC2.0, QC3.0, AFC and FCP fast charge adapter, trigger output 5v / 9v / 12v / 20v.
• Application --- can be used for power aging test, charger factory batch aging test, battery discharge test.
• Parameters -- rated operational voltage range DC 4.0-25.0V, max discharging power 35W, rated operational current 0.03-5.00A.
• Safe Protection -- anti-reverse protection, overvoltage protection OVP, overcurrent protection OCP, over-power protection OPP, low-voltage protection LVP, over-temperature protection OTP.
• Connection Ports --- USB, Micro USB, Type C and external wiring port.

Product features

DROK USB Intelligent Electronic Load

• Support fast charge.
• LCD high definition display.
• Fast charge automatic detection function.
• Power-on Auto trigger fast charge function.

• Parameters: DROK ac power meter voltage measuring range is AC 80-300V, current measuring range is 0-100A, active power range is 0-30000W, electric energy range is 0-9999999kWh.
• Color LED Display: the watt meter panel adopts clear LCD displaying accurate voltage, ampere, active power and electric quantity measuring values.
• Special Design: our ac voltage display designed with a switch for clear electric energy and come with a 15.5mm CT, with fast measuring speed of 2 times/s.
• Auto Store & Memory Function: when power off, the electric energy data will be stored and memorized, can be reset.
• Note: 1). The wires of voltage input terminal (green) and CT secondary input terminal (blue) cannot be connected wrongly, or the meter will be damaged. 2). The screen cannot be squeezed during installation, or there will be garbled code or break code.

User questions & answers

Question:	I have a 220 volt 200 amp split phase service can I connect one to each side and get a accurate readings? Does it reset if you lose power
Answer:	Yes you can. One meter on each phase-to-ground should work fine. Very little current is going through the meter, that's why it uses the CT-Current Transformer that comes with this meter, which typically is 1000:1. Very convenient also that it does not reset but keeps the KWh measured. Value which can be manually reset to 0.
Question:	What advantage is there with this over the kind you plug in a wall outlet to measure different appliances
Answer:	This can go to 100A. Wall outlet type only goes to 15A. I needed to measure an appliance that peaks near 20A, so the 15A wall type was not enough.
Question:	ive seen some of these are good for 20 amps. How does that work on a 200 amp panel
Answer:	This particular unit will max out at 100 AMps.
Question:	Would this work on a 2 pole circuit? Or would you need a unit for each hot lead
Answer:	Can anyone clarify the wiring on this? I purchased for this use case. Drok says "this meter wont work for my application" this post and other reviews are saying otherwise. Maybe the review photos are a trick because it shows 240 input voltage but only measuring wattage from one pole. I tried putting the red & black L1 / L2 though the CT and then powering the meter using the same leads. It shows 240v input voltage, but the wattage doesn't move. Is this post suggesting I need to do the same thing but run red & black L1 / L2 through the CT in opposite directions? like crisscrossing? then power the meter off the black & red L1 / L2 and do not tap White (Neutral) & Bare (Ground)? I am struggling to understand the logic on how opposing flow of electricity will sum the current. Joel M states "put the ammeter coil around the common hot lead" which is confusing, because I would consider the White (Neutral) lead to be common & completing the circuit for both 120v poles. So do I power the meter off the red & black L1 / L2 then put the coil around the White (Neutral)? I know the proper solution is to buy two units and add the wattage from both 120v... but that's too much wiring and monthly effort. I would rather buy a unit that works for 2 poles or get this sum solution to work.

Product features

Clear Color LCD Display

• 52*26mm color LCD screen.
• Display voltage, current, active power and electric quantity values simultaneously.
• All data will be clear at a glance.

Power Energy Clear Key

• When power off, the electric energy data will be stored automatically.
• The accumulated electric energy can be cleared by the button above.
• Clear method: Hold press the button for 5 seconds, and the accumulated electric energy will be cleared.

Current Transformer

• Comes with a 100A CT.
• CT Inner Diameter: 15.5mm
• CT Outer Diameter: 27mm
• Note: Please use the attached CT to measure, otherwise the measured value may be inaccurate.