Questions tagged [test-equipment]

Anything related to test equipments such as multimeter and so on...

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33 views

Non-contact dc voltage (not current) detection

I want to make a non-contact device to help me find the place of a broken wire. Say for repairing the wire of a headphone, so it should detect dc voltage (where the current is zero).
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39 views

Testing 16K SRAM in TL866 II Plus?

I have a GoldStar GM76C28A-10 16K (2048 x 8) SRAM DIP chip that I want to test in my TL866 II Plus. I don't see this chip in the list of known chips in the Xgpro v11.60 software and none of the "...
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90 views

What pitch is 14-pin header adapter

the device PCB have serial console port header and 14-pins test points right next it. It marked as J303, J304. The device processor is MIPs based, so I assume that could be a 14-pins MIPS JTAG header. ...
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67 views

Measuring extremely small inductance (pH) with transient pulse response

I've made an inductor device. It has 2 terminals. It has inductance, resistance, and some parallel interwinding capacitance. I am using a Keysight B1500a semiconductor probe station, which has ...
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3answers
2k views

Analog scales: Why do they have a metallic strip?

I have a couple of meters with analog scales and want to know why they have a shiny metallic area following the scale.
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150 views

Can anybody tell me what this device is and/or what it is used for?

I found this while going through some things at my grandfather's house. I believe it is used for residential wiring, but I'm not entirely sure. It resembles a pen. The tip is spring loaded with a very ...
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2answers
89 views

Efficient discharge of capacitor voltage to 2-10 ohm DUT

I need to apply the voltage in a capacitor to a load (between 2 and 10 Ω) and need to have the most efficient and simple method to do so. The goal is to apply power to a DUT (device under test), ...
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3answers
94 views

What does "Vpp" mean in terms of generated and measured waveforms?

I'm using a Keysight "EDUX1052G" oscilloscope (with built-in wave generator) to drive a red LED through a 470 ohm resistor. (I'm taking great care to keep the current draw on the wavegen to ...
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2answers
87 views

Viewing 100-200ns pulse on oscillocope

I've recently bought a Gould OS300 twin-beam 20MHz oscilloscope. I'm trying to view a 100ns to 200ns pulse, but I'm not sure I'm using the correct settings. The pulse voltage goes from 3.80V to 0V so ...
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1answer
51 views

Is there any SOIC test clip with 54 pin? [closed]

I need to test this IC, which has 54 pins, without unplug it from the PCB. So far I could not find SOIC test clip with 54 or more pins, so I was wondering if even such that test clip exists? If not, ...
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54 views

Reason for using short leads with capacitor tester?

When I was a high school freshman many moons ago, I took an electronics course. When the instructor introduced capacitors and how to test them, we used meters that had very short (3 inches or so long) ...
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1answer
76 views

What test equipment can simulate the inductive load of a DC motor?

I am working on a power supply circuit designed to drive DC motor. Currently, I am testing using the actual DC motor, but I would like to start using test equipment instead. There are several options ...
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1answer
84 views

how can I figure out if 1-3V is flowing from something using household items?

Basically what the (unconventional) question says! I don't have a voltmeter at home. How can I fashion one, or use some kind of test to determine if current is flowing? I know it's a relatively low ...
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47 views

200 Input Smart Multimeter Project

First off, thanks for taking the time to read this and help out. Here's a quick overview of what I am trying to design. I have a break out box that has 200 female probe inputs. Each input is numbered, ...
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35 views

What are the IEC standards/certifications to look for in a DSO while making measurements pertaining analog parameters like CMRR, SNR, THD etc

I am in the process of measuring CMRR for our mixed signal system that deals with bio-signal acquisition. I am using DSOX2014A keysight entry-level oscilloscope to make measurement to derive CMRR, SNR ...
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62 views

Help identify component HP5300A

The red framed element is on a PCB of a 1973 Hewlett Packard 5300A Measuring System, Digital Multimeter Board. The double wire seems to have normal resistance. What is the screw for?
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1answer
59 views

Generate Square Wave with Fast Rise Time for Testing

I'm looking to economically generate a 1-2 GHz (configurable) Square Wave with a rise time of 200ps (or faster) to test the performance of various active scope probe designs. I don't need to be able ...
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2answers
47 views

What does this multimeter tempco spec mean?

This is the accuracy spec for an Agilent 34401A 6-1/2 digit multimeter. What exactly does the "temperature coefficient" mean here? Does it mean that the reading will not change by more than ...
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3answers
134 views

Can I use an adjustable DC power supply to discharge a battery?

With a typical adjustable DC power supply, I can set the current (typically a mode called I-Set) to provide a fixed current by controlling the voltage. (within the limits of the supply) When testing a ...
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1answer
43 views

Test device for capacitive touch screens?

Are there any (more or less) simple test devices for capacitive touch screens, e.g. something which I can attach to a touch screen and which is able to do capacitive inputs at fixed locations (ideally,...
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56 views

How can I make a test circuit and application for CA3020A power amplifier?

I found these components recently and am eager to work on them. I first need to check if they are working and then need to make an application with them. I referred to the data sheet but still not ...
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1answer
235 views

100Mhz damped Sine Wave

I have simulated an damped sine wave generator in ltspice. Since I couldn't find a model for single pole double throw relay, I used two switch. It is very basic circuit first charges capacitor and ...
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0answers
138 views

Automotive 20:1 Oscilloscope Passive Attenuator Design

I'm currently working on designing a switched, passive 20:1 attenuator for use in an automotive educational environment on PicoScope PC based oscilloscopes. In automotive electrical diagnostics, it's ...
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2answers
356 views

Constant resistance mode in electronic load

I have this DC electronic load. I am setting this electronic load to a constant resistance mode option - say 100 ohms - and turning the output ON. When I measure the resistance across the electronic ...
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1answer
74 views

Problems enabling remote voltage-sense Rigol load DL3021 via SCPI

I am automating some tests with Rigol hardware. There is only one bottleneck in the SCPI implementation that I can't figure out: How to enable the remote voltage-sense terminals on the Rigol DP3021 ...
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0answers
34 views

Equipment for analyzing large DC distribution system

I'd like obtain the transfer function of a large DC power distribution system. My question is whether there's equipment (like vector network analyzers) designed to assist with modeling these type of ...
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0answers
34 views

Steps for connecting femal-to-female sacrificial adaptor into a male connector in the RF measurement equipment

First of all, I am a newbie to the RF-mm-wave test equipments. I am trying to use this Agilent equipment shown in the image below where I want to connect a 1.85mm (F-to-F) sacrificial connector to the ...
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1answer
40 views

What's the minimum equipment rating required to perform testing in production environment? [closed]

I would like to purchase a Power supply to test my unit in production environment. The power supply is expected to support a production yield of 1 Million units per year. As per one of the test ...
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60 views

Generate spikes on RS485 bus

I was thinking to build some test equipment for a RS485 bus, but Would like to get some suggestions on how I can introduce bursts of spikes in a "safe" way without damaging the connected ...
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0answers
77 views

How to measure broadband noise

I need to measure the noise performance of an DAC + Amplifier combination. The system has a bandwidth of ~100MHz and the expected noise level is approx. 1-2 mV rms. What is the preferred instrument to ...
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1answer
52 views

Using Inductor and Electronic Load Instead of a Permanent Magnet Synchronous Motor (PMSM)

I would like to test whether my power board can handle to currents required to drive a 1.5 kW motor. My issue is that the motor testbench is still not here and I have to test it now. I do not have ...
8
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2answers
2k views

Is there such a thing as a programmable power sink?

Is there such a thing as a power sink equivalent to a benchtop power supply, where I can set the wattage (voltage, amperage) to be consumed? What is this device called?
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1answer
70 views

Open-source DIY audio spectrum analyser and/or graphic equaliser

does anyone know of any OpenSource/DIY audio spectrum analyser projects can they direct me to an article, video, pics hackaday and instructionals style also I.C's old or new that i could/should try ...
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69 views

How to read different IV charts in the "component tester"?

I am doing a "comparison test" of 2 cards with the component tester. My component tester has 4 different test modes. LOGIC, LOW, MED and HIGH. LOGIC (10V 10mA), LOW (10V 100mA), MED (20V 5mA) and HIGH ...
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2answers
51 views

Efficiency test for motor drives

Hey I have a BLDC square wave controller. How to check the efficiency of the controller alone (not including the BLDC motor). Any suggestions ? I have checked with DC load test machine, but what I ...
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2answers
107 views

Need Help Trouble Shooting A HP 8559A Spectrum Analyzer

I recently acquired an HP 8559A spectrum analyzer however instead of the HP182T display it was supposed to have it shipped with an HP180C display. I am unable to get the display to output a signal (I ...
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1answer
63 views

Measuring 150kHz, ~30V peak waveform with good resolution

I am trying to choose test equipment for a systems test application and I am running into a road block with one of the specs I need to meet. The device features an H-bridge output similar to the ...
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2answers
2k views

How safe are voltage detector pens and how can I test one's safety?

I'm not an electrician and I have some basic understanding of how voltage testing pens work. I haven't had an incident with them before but I'm still quite concerned about their safety mechanisms. I ...
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1answer
64 views

How do I shield PLB signals?

I am trying to refurbish an electronic personal locator beacon (for rescue callouts for stranded hikers/sailors/pilots). To do so to spec most devices require a GPS signal test (activation). There is ...
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1answer
45 views

Which adapter/handling to choose on (Type N) rf test devices when SMA/K cables have to be connected frequently?

I'm no expert in high frequency. But probably it is no good idea to change the adapters sitting on type N female output on and on as a torque wrench is used to fix them. But I have to make ...
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1answer
63 views

Will using magnetic base test indicators with breadboards cause electrical interference?

The situation leading to the question In the Quick Tips #8 // Precision Helping Hands YouTube Video, a "helping hands" with various names such as "Magnetic Base Adjustable Metal Test Indicator Holder"...
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2answers
79 views

How to efficiently mux many signals to/from a climate chamber?

I am building a setup to measure various parameters across a temperature range from -55°C to +125°C. The devices under test will be placed in a climate chamber. There are around 10 signals from each ...
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2answers
589 views

How to solder these tiny pogo pins?

I bought pogo pins to use for firmware uploading. So I have to make a Jig for my PCB, but this is the first time I use pogo pins. I have no ideas where I have to solder, I mean I want to know if ...
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1answer
62 views

What are the general guidelines to conduct a stress test for an assembled PCB to test reliability after fabrication?

I got a PCB fabricated from a board-house. The PCB contains: DC-DC power circuit protection diodes Atmel ATtiny microcontroller LED's USB hub and interface to a RPi I want to conduct a stress test ...
5
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1answer
759 views

How to check if my quadrature encoder is broken or not?

I have purchased some cheap quadrature incremental encoders (YUMO E6A2-CW3C) for which I have found "a" data-sheet here. Now based on my limited knowledge the quadrature incremental encoders are ...
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1answer
212 views

What is an impedance bridge?

Today, I saw a very old historical piece of lab equipment at the university. It had a large number of dials, although not as large as you would see in an oscilloscope. The size was similar to an ...
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1answer
33 views

How to route current for ATE?

I have many test points on a board, a small DAQ, and an SMU that I can program with LabView. Depending on the test, I need to change which test point the SMU is sending/measuring voltage or current. ...
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1answer
53 views

Use a TVS device to protect meter from live capacitors, workable or not?

I've been working on a LCR/Impedence meter and want to protect my inputs from possible damage if I forget to discharge a large cap. I know I've seen various types of diodes and relays used for that ...
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1answer
55 views

Easy way to probe signals on a multi-conductor cable?

I have a device that I need to reverse-engineer. This device has a large multi-conductor cable -- over 20 wires that are jacketed into two circular bundles. I'll need to look at all these signals with ...
3
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1answer
186 views

EAGLE 9.4.1 How do I autoroute a range of signals?

I have a board with three 32 input analog multiplexers, along with more components, connected to a 96 way DIN connector. How do I manually tell the autorouter to select only the muxers signals? I ...