Suggestion 1: Use external trigger. If the default internal trigger is used, a lot of unqualified test data will be generated before the product is not connected or is successfully connected to the test fixture. This problem can be avoided through external triggering.

Suggestion 2: Use fixed ranges. Avoid time wastage caused by automatic range changing.

Suggestion 3: Avoid test fixture errors. The fixture should be as short as possible and have strong anti-interference ability. Zero the fixture.

Suggestion 4: If a relay is used to switch test points, the relay should be as close as possible to the DUT.

 More Porduct information: DC Milli-Ohm Meter

Step 1: Enter Compare mode and set the upper limit and lower limit of acceptance.

Step 2: The pass/fail signal will be output from the rear panel handler interface. Pin 6 is passed and pin 4 is failed.

Step 3: Connect the above signals to the PLC and control it by the PLC. If you want to directly drive a device (such as a warning light) with a signal, you must pay attention to the driving capability. When the driving capability is insufficient, an external driving circuit must be added. The external drive circuit diagram is as follows.

Figure 1 PLC

Figure 2 PLC+Relay

For suggestions on how to avoid misjudgments in production line automated measurement and improve test productivity, please search the FAQ with the following title.

Suggestions for automated measurement of milliohm meter GPM-804/GOM-805 production line to avoid misjudgments and improve test productivity

More Porduct information: DC Milli-Ohm Meter

GRA-417 for GPT-9900A/9800/9600 series and GCT-9040

GRA-422 for GDM-906X series/GDM-8261A/GDM-8255A/GDM-834X series/LCR-6000 series/GBM series/GPM-8310/8213

GRA-419 (EIA) for PCS-1000i

GRA-436 for GDM-906X series/GDM-8261A/GDM-8255A/LCR-6000 series/GBM-3000 series/GPM-8213

GRA-445 for LCR-8200 and LCR-8200A series

GRA-438 for GSB-01/02

GRA-433 for GPT-9904

GRA-419 (JIS) for PCS-1000i

GRA-440 for GPT-10000 series

GRA-454 for DAQ-9600

Setting both low and high current limits is important in order to protect electronic devices and ensure their safe and reliable operation.

Here are a few reasons why:

• Prevents damage: Electronic components can be damaged or destroyed by excessive current flow. By setting a low current limit, the circuit can prevent current from exceeding safe levels and potentially causing damage.
• Safety: High current flow can also pose a safety risk, such as overheating or causing a fire. By setting a low current limit, the circuit can help prevent such safety hazards.
• Efficiency: On the other hand, setting a high current limit can allow devices to operate at their optimal efficiency, such as in the case of a motor that requires a certain level of current to run smoothly.
• Control: Setting both low and high current limits can also provide greater control over the device or system, allowing for more precise adjustments and ensuring that it operates within safe and optimal conditions.

Overall, setting both low and high current limits is important in order to protect electronic components, ensure safety, improve efficiency, and provide greater control over the operation of electronic devices and systems.

Product Informatioon: Safety Testers 

#Safety Testers #Hipot Testers 

Arcing is an electrical phenomenon that occurs when an electric current flows through a medium, such as air, and creates a visible and audible discharge in the form of an electric arc. An arc is essentially an ionized channel of gas, created when the electrons in the current ionize the gas molecules in the medium.

Arcing can occur in a variety of electrical systems and equipment, including power transmission and distribution systems, electrical machines, and electronic devices. It can be caused by various factors, such as high voltage, current overload, insulation breakdown, or contact between conductive materials.

Arcing can have significant consequences, including damage to the equipment, power interruptions, and safety hazards to personnel in the area. In some cases, it can also result in fires and explosions.

To prevent arcing, various measures are taken, such as designing equipment with appropriate insulation, maintaining proper clearances and creepage distances, and using protective devices such as fuses, circuit breakers, and surge suppressors. Regular maintenance and testing of electrical equipment can also help detect and prevent arcing.

Product Informatioon: Safety Testers 

#Safety Testers #Hipot Testers #ARC Detection

The voltage for a withstand voltage test, also known as a high potential (Hipot) test, is typically specified by the relevant standards or the manufacturer's specifications for the equipment being tested.

The voltage level used in the test depends on the equipment's insulation class, rating, and application. For example, the voltage used for a Hipot test on low voltage equipment may be in the range of 1000 to 5000 volts AC, while the voltage for high voltage equipment may be in the range of 10,000 to 100,000 volts AC or higher.

It's important to note that the voltage level used in the Hipot test should not exceed the equipment's design specifications or insulation rating, as this can cause damage to the equipment and create safety hazards for the test operator. The Hipot test should always be performed by trained personnel using appropriate safety equipment and procedures.

Product Informatioon: Safety Testers 

#Safety Testers #Hipot Testers #Hipot #High Potential Test

A hipot test, also known as a high-potential or high-voltage test, is used to check the electrical insulation of wires, cables, and other electrical equipment.

Hipot testing is performed by applying a high voltage, typically several thousand volts, to the device being tested to check for any insulation failures or "weak spots" that could cause electrical hazards, such as electric shocks, fires, or equipment damage. The tester measures the current that flows through the insulation and compares it to a set threshold. If the current exceeds the threshold, it indicates that there is an insulation breakdown, and the device being tested has failed the hipot test.

Hipot testing is typically performed on newly manufactured electrical equipment or devices, as well as on equipment that has undergone repairs or maintenance, to ensure that the electrical insulation is still intact and functioning properly. The test is important to ensure the safety of people working with or near the equipment and to prevent electrical hazards.

In addition to the safety benefits, hipot testing is also useful for detecting manufacturing defects, such as insulation cracks or voids that may have occurred during production. By identifying these issues early on, manufacturers can address them before the equipment is shipped to customers, reducing the risk of equipment failures and warranty claims.

Overall, hipot testing is an important electrical testing procedure used to ensure the safety and reliability of electrical equipment and to prevent electrical hazards.

Product Informatioon: Safety Testers 

#Safety Testers #Hipot Testers

There are two ways to measure the current. The first is to use an inductive CT (AC current) or a Hall element (induce a DC current); the second is to use a current shunt.

Since the accuracy of the inductive current sensor is not high, the second method is adopted in the current calibration, and it must be a precise current shunt. Precision current shunts are actually precision resistors, because resistors have temperature effects, and components with low temperature drift coefficients are required to ensure accuracy.

GW Instek and Prodigit are currently the leading manufacturers of precision current shunts.

GW Instek PCS-1000I (current range 300A) has a built-in measurement capability of 6 1/2 digits multimeter, which can simplify wiring and reduce the load effect caused by extra wiring.

Prodigit

7550A current range: 1uA~250A

1000A current range: 1uA~1000A (1000A-R is input from the rear panel)

2000A current range: 1uA~2000A (2000A-R is input from the rear panel)

Micro-ohmmeter GOM-804, GOM-805 have two power-on settings

Setting 1: You can choose to use the settings before the last shutdown when starting up

It is suitable for the situation where the instrument user is dedicated and the measurement project has not changed.

Setting 2: You can choose to use the factory default settings when starting up

It is suitable for multiple users to share the instrument, and the measurement projects and settings of each user are greatly different in usage scenarios

How to change boot settings:

Step 1: Select System from System menu icon

Step 2: Use the up, down, left and right keys to select Power ON Status Setup

Step 3: Select Recall Previous Settings and Load Default

Micro-ohmmeter GOM-804, GOM-805 firmware is divided into Master (main firmware file) version and Slave (affiliated firmware file) version.

Precautions on Firmware Update:

1.Please burn the Slave (affiliated firmware file) version first.

2.The master firmware version (Master) version 3.06 (and later) needs to be matched with the affiliated firmware version (Slave) version 3.04 (and latest)

3.During the firmware update, the instrument cannot be powered off. Such interruption will cause the update to fail and the instrument will not be able to boot normally.

Preparations before firmware upgrade:

Preparation 1: Please download TI (Texas Instruments) LM Flash Programmer

https://www.ti.com/tool/LMFLASHPROGRAMMER

https://www.dropbox.com/s/pbnxhx3qzl25pbp/LMFlashProgrammer.rar?dl=0

Preparation 2: Download DFU driver (driver)

https://www.dropbox.com/s/36zdsi10oqe0gdq/DFU%20Driver%20Setup.7z?dl=0

Preparation 3: Join GW Instek membership, download the latest firmware of GOM-804, GOM-805, including Master and Slave.

Firmware upgrade steps:

Steps to burn Slave

Step 1: Connect the computer to the instrument via a USB cable

Step 2: Press and hold the ESC and RANGE keys of the instrument at the same time and then press the POWER key to turn on

Step 3: Release the ESC and RANGE keys after the BootLoader Mode Slave update text appears on the screen

Step 4: Open the TI LM Flash Programmer program on the computer, perform configuration, and select USB DFU for Interface.

Step 5: Click Program (burning) of TI LM Flash Programmer, Browse of Select .bin file, select the folder where the Slave BIN file is located and click the latest version after downloading

Step 6: After confirming the programming file, click the Program button to start programming

Step 7: After the programming is completed, remove the connection between the computer and the instrument, turn off the instrument and restart it to confirm the system firmware version. If it has been updated to a newer version, it means the update is successful.

Steps to Burn Master

Step 1: Connect the computer to the instrument via a USB cable

Step 2: Press and hold the ESC and DRIVE keys of the instrument at the same time, then press the POWER key to turn on

Step 3: Release the ESC and DRIVE keys after the BootLoader Mode Master update text appears on the screen

Step 4: Open the TI LM Flash Programmer program on the computer, perform configuration, and select USB DFU for Interface.

Step 5: Click Program (burning) of TI LM Flash Programmer, Browse of Select .bin file, select the folder where Master BIN file is located and click the latest version after downloading

Step 6: After confirming the programming file, click the Program button to start programming

Step 7: After the programming is completed, remove the connection between the computer and the instrument, turn off the instrument and restart it to confirm the system firmware version. If it has been updated to a newer version, it means the update is successful.

Compatibility mode setting method, the command is compatible with Keysight (HP, Agilent) 34401A, 34460A, 34461A)

Setting steps:

Step 1. Press the menu button

Step 2. Press the Next Page button twice to go to the Interface page

Step 3. Press the Next Page button or selector knob until the SCPI ID "identification"

Step 4. Press the enter (knob) key to select the SCPI ID as User

Step 5. Press the Enter key to select Finish

Instruments that measure amplitude (multimeter or oscilloscope) must be measured at full scale to achieve the best accuracy.

When learning the pointer multimeter, it is usually switched to the highest voltage level, such as 1000V to protect the input of the meter. At this time, the pointer swing range is small (the accuracy and resolution are not good), and then change obtain the reading after switching to the small level and getting the best measurement level close to full scale.

But in the era of digital multimeters, they usually have the function of Auto Range (automatic adjustment of levels), but because it is impossible to observe the current resolution in the range like an pointer multimeter, the simulated swing range of a  pointer multimeter (Analog Bar) function allows users to know the current resolution status. After the automatic adjustment of the level, if the Analog Bar is only half or lower, the level should be manually adjusted to achieve full scale measurement.

GW Instek’s multimeters with analog bar function include GDM-541 and GDM-533.