Should I wear a grounded ESD strap when probing/debugging my raw boards?
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Manufacturing and handling the unpowered boards, the assembly workers often use strict ESD control: dissipative mats, smocks, and grounded wrist bands.
As an embedded engineer, I am always powering and probing up my raw boards (without the plastics enclosures) at my cubicle... JTAG debugging them without any sort of ESD safety.
What is the recommended guidance on this? Should I be worried about ESD? Do I need to be wearing any ESD gloves/strap?
note: the humidity in my office is around 40-50%
esd
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up vote
3
down vote
favorite
Manufacturing and handling the unpowered boards, the assembly workers often use strict ESD control: dissipative mats, smocks, and grounded wrist bands.
As an embedded engineer, I am always powering and probing up my raw boards (without the plastics enclosures) at my cubicle... JTAG debugging them without any sort of ESD safety.
What is the recommended guidance on this? Should I be worried about ESD? Do I need to be wearing any ESD gloves/strap?
note: the humidity in my office is around 40-50%
esd
add a comment |Â
up vote
3
down vote
favorite
up vote
3
down vote
favorite
Manufacturing and handling the unpowered boards, the assembly workers often use strict ESD control: dissipative mats, smocks, and grounded wrist bands.
As an embedded engineer, I am always powering and probing up my raw boards (without the plastics enclosures) at my cubicle... JTAG debugging them without any sort of ESD safety.
What is the recommended guidance on this? Should I be worried about ESD? Do I need to be wearing any ESD gloves/strap?
note: the humidity in my office is around 40-50%
esd
Manufacturing and handling the unpowered boards, the assembly workers often use strict ESD control: dissipative mats, smocks, and grounded wrist bands.
As an embedded engineer, I am always powering and probing up my raw boards (without the plastics enclosures) at my cubicle... JTAG debugging them without any sort of ESD safety.
What is the recommended guidance on this? Should I be worried about ESD? Do I need to be wearing any ESD gloves/strap?
note: the humidity in my office is around 40-50%
esd
esd
asked Aug 23 at 16:13
hassan789
1,37111427
1,37111427
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3 Answers
3
active
oldest
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up vote
3
down vote
accepted
My entire office is carpeted, and we constantly debug/test raw PCBAs at our desks. I take care to ground myself on metal objects around me, and I have an ESD mat on my desk. When I have to transport boards, I put them in ESD bags. I also take care to ground myself after getting up from my chair, or upon sitting down. When passing off boards to others, we always do the "EE's handshake", where we touch hands before exchanging the PCBAs.
This has worked well for us, and I have yet to see a PCBA damaged due to unintentional ESD.
1
This is how I do it, too. In addition, I try to be in contact with the ESD mat whenever I'm handling or probing the boards. Nothing difficult: If I'm picking something up with one hand I rest my other hand on the mat first. When I'm soldering/probing/etc, I would be resting my elbows or forearms on the table/mat anyway :)
â bitsmack
Aug 23 at 17:34
1
That being said, the "correct" way is to wear a strap, etc...
â bitsmack
Aug 23 at 17:37
1
Agreed. I also would take into consideration how expensive the hardware being worked on is. If I'm testing a motherboard, I'm a lot more careful than with a $3.00 prototype PCBA...
â Daniel
Aug 23 at 17:55
add a comment |Â
up vote
2
down vote
Technically, yes. However, in my experience most boards seem to be much less ESD sensitive after they are assembled. Some logic families can still be very sensitive; we used to work with FCT (Fast CMOS Technology) logic from IDT and that definitely needed wrist straps all the time.
good point about assembled PWAs, they are indeed less sensative
â hassan789
Aug 23 at 19:05
add a comment |Â
up vote
2
down vote
It is generally a good idea to wear a wrist strap, keep in mind there should be 1Mé of resistance between the strap and whatever ground your connecting it to, which reduces the chance of you becoming part of a circuit in the event of a short and possible injury.
I have seen ESD discharges ruin flash on micros before and the board needed to be reflashed. Most ports are protected these days with ESD diodesdiodes, but intermittency caused by ESD can cost you hours of debugging to find the problem is the hardware and not the software. Any form of ESD mitigation is recommended, in other words, wear the wrist strap.
add a comment |Â
3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
3
down vote
accepted
My entire office is carpeted, and we constantly debug/test raw PCBAs at our desks. I take care to ground myself on metal objects around me, and I have an ESD mat on my desk. When I have to transport boards, I put them in ESD bags. I also take care to ground myself after getting up from my chair, or upon sitting down. When passing off boards to others, we always do the "EE's handshake", where we touch hands before exchanging the PCBAs.
This has worked well for us, and I have yet to see a PCBA damaged due to unintentional ESD.
1
This is how I do it, too. In addition, I try to be in contact with the ESD mat whenever I'm handling or probing the boards. Nothing difficult: If I'm picking something up with one hand I rest my other hand on the mat first. When I'm soldering/probing/etc, I would be resting my elbows or forearms on the table/mat anyway :)
â bitsmack
Aug 23 at 17:34
1
That being said, the "correct" way is to wear a strap, etc...
â bitsmack
Aug 23 at 17:37
1
Agreed. I also would take into consideration how expensive the hardware being worked on is. If I'm testing a motherboard, I'm a lot more careful than with a $3.00 prototype PCBA...
â Daniel
Aug 23 at 17:55
add a comment |Â
up vote
3
down vote
accepted
My entire office is carpeted, and we constantly debug/test raw PCBAs at our desks. I take care to ground myself on metal objects around me, and I have an ESD mat on my desk. When I have to transport boards, I put them in ESD bags. I also take care to ground myself after getting up from my chair, or upon sitting down. When passing off boards to others, we always do the "EE's handshake", where we touch hands before exchanging the PCBAs.
This has worked well for us, and I have yet to see a PCBA damaged due to unintentional ESD.
1
This is how I do it, too. In addition, I try to be in contact with the ESD mat whenever I'm handling or probing the boards. Nothing difficult: If I'm picking something up with one hand I rest my other hand on the mat first. When I'm soldering/probing/etc, I would be resting my elbows or forearms on the table/mat anyway :)
â bitsmack
Aug 23 at 17:34
1
That being said, the "correct" way is to wear a strap, etc...
â bitsmack
Aug 23 at 17:37
1
Agreed. I also would take into consideration how expensive the hardware being worked on is. If I'm testing a motherboard, I'm a lot more careful than with a $3.00 prototype PCBA...
â Daniel
Aug 23 at 17:55
add a comment |Â
up vote
3
down vote
accepted
up vote
3
down vote
accepted
My entire office is carpeted, and we constantly debug/test raw PCBAs at our desks. I take care to ground myself on metal objects around me, and I have an ESD mat on my desk. When I have to transport boards, I put them in ESD bags. I also take care to ground myself after getting up from my chair, or upon sitting down. When passing off boards to others, we always do the "EE's handshake", where we touch hands before exchanging the PCBAs.
This has worked well for us, and I have yet to see a PCBA damaged due to unintentional ESD.
My entire office is carpeted, and we constantly debug/test raw PCBAs at our desks. I take care to ground myself on metal objects around me, and I have an ESD mat on my desk. When I have to transport boards, I put them in ESD bags. I also take care to ground myself after getting up from my chair, or upon sitting down. When passing off boards to others, we always do the "EE's handshake", where we touch hands before exchanging the PCBAs.
This has worked well for us, and I have yet to see a PCBA damaged due to unintentional ESD.
answered Aug 23 at 16:23
Daniel
1,3302920
1,3302920
1
This is how I do it, too. In addition, I try to be in contact with the ESD mat whenever I'm handling or probing the boards. Nothing difficult: If I'm picking something up with one hand I rest my other hand on the mat first. When I'm soldering/probing/etc, I would be resting my elbows or forearms on the table/mat anyway :)
â bitsmack
Aug 23 at 17:34
1
That being said, the "correct" way is to wear a strap, etc...
â bitsmack
Aug 23 at 17:37
1
Agreed. I also would take into consideration how expensive the hardware being worked on is. If I'm testing a motherboard, I'm a lot more careful than with a $3.00 prototype PCBA...
â Daniel
Aug 23 at 17:55
add a comment |Â
1
This is how I do it, too. In addition, I try to be in contact with the ESD mat whenever I'm handling or probing the boards. Nothing difficult: If I'm picking something up with one hand I rest my other hand on the mat first. When I'm soldering/probing/etc, I would be resting my elbows or forearms on the table/mat anyway :)
â bitsmack
Aug 23 at 17:34
1
That being said, the "correct" way is to wear a strap, etc...
â bitsmack
Aug 23 at 17:37
1
Agreed. I also would take into consideration how expensive the hardware being worked on is. If I'm testing a motherboard, I'm a lot more careful than with a $3.00 prototype PCBA...
â Daniel
Aug 23 at 17:55
1
1
This is how I do it, too. In addition, I try to be in contact with the ESD mat whenever I'm handling or probing the boards. Nothing difficult: If I'm picking something up with one hand I rest my other hand on the mat first. When I'm soldering/probing/etc, I would be resting my elbows or forearms on the table/mat anyway :)
â bitsmack
Aug 23 at 17:34
This is how I do it, too. In addition, I try to be in contact with the ESD mat whenever I'm handling or probing the boards. Nothing difficult: If I'm picking something up with one hand I rest my other hand on the mat first. When I'm soldering/probing/etc, I would be resting my elbows or forearms on the table/mat anyway :)
â bitsmack
Aug 23 at 17:34
1
1
That being said, the "correct" way is to wear a strap, etc...
â bitsmack
Aug 23 at 17:37
That being said, the "correct" way is to wear a strap, etc...
â bitsmack
Aug 23 at 17:37
1
1
Agreed. I also would take into consideration how expensive the hardware being worked on is. If I'm testing a motherboard, I'm a lot more careful than with a $3.00 prototype PCBA...
â Daniel
Aug 23 at 17:55
Agreed. I also would take into consideration how expensive the hardware being worked on is. If I'm testing a motherboard, I'm a lot more careful than with a $3.00 prototype PCBA...
â Daniel
Aug 23 at 17:55
add a comment |Â
up vote
2
down vote
Technically, yes. However, in my experience most boards seem to be much less ESD sensitive after they are assembled. Some logic families can still be very sensitive; we used to work with FCT (Fast CMOS Technology) logic from IDT and that definitely needed wrist straps all the time.
good point about assembled PWAs, they are indeed less sensative
â hassan789
Aug 23 at 19:05
add a comment |Â
up vote
2
down vote
Technically, yes. However, in my experience most boards seem to be much less ESD sensitive after they are assembled. Some logic families can still be very sensitive; we used to work with FCT (Fast CMOS Technology) logic from IDT and that definitely needed wrist straps all the time.
good point about assembled PWAs, they are indeed less sensative
â hassan789
Aug 23 at 19:05
add a comment |Â
up vote
2
down vote
up vote
2
down vote
Technically, yes. However, in my experience most boards seem to be much less ESD sensitive after they are assembled. Some logic families can still be very sensitive; we used to work with FCT (Fast CMOS Technology) logic from IDT and that definitely needed wrist straps all the time.
Technically, yes. However, in my experience most boards seem to be much less ESD sensitive after they are assembled. Some logic families can still be very sensitive; we used to work with FCT (Fast CMOS Technology) logic from IDT and that definitely needed wrist straps all the time.
answered Aug 23 at 16:16
CrossRoads
6174
6174
good point about assembled PWAs, they are indeed less sensative
â hassan789
Aug 23 at 19:05
add a comment |Â
good point about assembled PWAs, they are indeed less sensative
â hassan789
Aug 23 at 19:05
good point about assembled PWAs, they are indeed less sensative
â hassan789
Aug 23 at 19:05
good point about assembled PWAs, they are indeed less sensative
â hassan789
Aug 23 at 19:05
add a comment |Â
up vote
2
down vote
It is generally a good idea to wear a wrist strap, keep in mind there should be 1Mé of resistance between the strap and whatever ground your connecting it to, which reduces the chance of you becoming part of a circuit in the event of a short and possible injury.
I have seen ESD discharges ruin flash on micros before and the board needed to be reflashed. Most ports are protected these days with ESD diodesdiodes, but intermittency caused by ESD can cost you hours of debugging to find the problem is the hardware and not the software. Any form of ESD mitigation is recommended, in other words, wear the wrist strap.
add a comment |Â
up vote
2
down vote
It is generally a good idea to wear a wrist strap, keep in mind there should be 1Mé of resistance between the strap and whatever ground your connecting it to, which reduces the chance of you becoming part of a circuit in the event of a short and possible injury.
I have seen ESD discharges ruin flash on micros before and the board needed to be reflashed. Most ports are protected these days with ESD diodesdiodes, but intermittency caused by ESD can cost you hours of debugging to find the problem is the hardware and not the software. Any form of ESD mitigation is recommended, in other words, wear the wrist strap.
add a comment |Â
up vote
2
down vote
up vote
2
down vote
It is generally a good idea to wear a wrist strap, keep in mind there should be 1Mé of resistance between the strap and whatever ground your connecting it to, which reduces the chance of you becoming part of a circuit in the event of a short and possible injury.
I have seen ESD discharges ruin flash on micros before and the board needed to be reflashed. Most ports are protected these days with ESD diodesdiodes, but intermittency caused by ESD can cost you hours of debugging to find the problem is the hardware and not the software. Any form of ESD mitigation is recommended, in other words, wear the wrist strap.
It is generally a good idea to wear a wrist strap, keep in mind there should be 1Mé of resistance between the strap and whatever ground your connecting it to, which reduces the chance of you becoming part of a circuit in the event of a short and possible injury.
I have seen ESD discharges ruin flash on micros before and the board needed to be reflashed. Most ports are protected these days with ESD diodesdiodes, but intermittency caused by ESD can cost you hours of debugging to find the problem is the hardware and not the software. Any form of ESD mitigation is recommended, in other words, wear the wrist strap.
answered Aug 23 at 16:45
laptop2d
21.7k123072
21.7k123072
add a comment |Â
add a comment |Â
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