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  1.  Home
  2. MIDRANGE-L
  3. January 2018

RE: What is the risk of low humidity?

Paul:

For future reference I get shocks all the time at datacenters south of the
Mason/Dixon line. It seems many system managers down south think that's a
"northerner" problem. Had an HMC go completely off line simply by touching
the chassis last month, in Florida. Humidity was so low in the data center
tape, printers, and other things were failing all over. A call to the HVAC
guy fixed it. As Larry said, most CRACs have humidifiers in them.


--
Jim Oberholtzer
Agile Technology Architects


-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Jack
Woehr
Sent: Tuesday, January 02, 2018 10:01 AM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Subject: Re: What is the risk of low humidity?

When we had a week in the winter of 1988-1989 when it didn't get above -22
F. in the daytime here in Colorado, the humidity went to single digits.

We had an embedded control project with four SBCs and a bunch of relays
bolted to a steel plate.

When we would enter the room and get within 7 feet of this assemblage in
that weather, the clicking of the relays would usually alerte us to a system
reset..

We were each walking around in a cloud of charge..

On Tue, Jan 2, 2018 at 7:57 AM, Paul Nelson <nelsonp@xxxxxxxxxxxxx> wrote:

Spoken like a true Northerner.

Paul Nelson
Cell 708-670-6978
Office 409-267-4027
nelsonp@xxxxxxxxxxxxx


-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of
Rob Berendt
Sent: Tuesday, January 02, 2018 8:22 AM
To: Midrange Systems Technical Discussion
Subject: RE: What is the risk of low humidity?

No carpeting in our raised floor room. Back in the consulting days I
did have some sites I recommended antistatic mats. And one place I
wouldn't touch a keyboard without first touching the terminal with a
metal edged ruler, the shock was that bad.
However not applicable to our situation.


Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1 Group Dekko Dept 1600
Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com





From: "Paul Nelson" <nelsonp@xxxxxxxxxxxxx>
To: "'Midrange Systems Technical Discussion'"
<midrange-l@xxxxxxxxxxxx>
Date: 01/02/2018 09:11 AM
Subject: RE: What is the risk of low humidity?
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>



Do they still make those anti-static grounding mats?

One of my early employers let his wife design the room in which the
S/3 Model 15D was housed. Not only did she have the sheet metal of the
machine sent to the paint booth to have the panels painted in the
company colors, she had light gray wool carpet laid before the machine was
moved in.

She didn't have to live with having to walk around the room while
grounding oneself full time, she also didn't anticipate the damage to
the carpet from the ink dust generated by the ribbons of a 1403 N1
printer.

Paul Nelson
Cell 708-670-6978
Office 409-267-4027
nelsonp@xxxxxxxxxxxxx


-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of
Steve Pitcher
Sent: Tuesday, January 02, 2018 7:56 AM
To: Midrange Systems Technical Discussion
Subject: RE: What is the risk of low humidity?

Lower humidity = higher risk of generating static electricity.



Steve Pitcher
iTech Solutions
Office: (203) 744-7854 Ext. 176
Mobile: (902) 301-0810
http://www.itechsol.com
http://www.iInTheCloud.com

-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of
Rob Berendt
Sent: Tuesday, January 2, 2018 9:29 AM
To: midrange-l@xxxxxxxxxxxx
Subject: What is the risk of low humidity?

https://www.ibm.com/support/knowledgecenter/en/8286-42A/
p8ebe/p8ebe_tempandh

umiditydesign.htm

What is the risk of low humidity in a machine room with little
personnel interaction (IOW prolonged exposure resulting in nose bleeds
is not really my concern)?
How does one remediate it in an internal data center?
Are the guidelines above "recommended" levels, or damage will occur
when exceeding these levels?
I believe Power 8 equipment has overheat shutdown. Is there such a
thing for humidity threshold violations? If so, at what levels?

We have the monitoring equipment. Our current action plan on getting
notifications that environmental thresholds are being violated is to
change the thresholds until the notifications cease.
I did get a phone call to ensure that the general temperature within
the building was comfortable for human occupancy. Outside it is
currently -12 Fahrenheit.


Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1 Group Dekko Dept 1600
Mail
to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com

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Absolute Performance, Inc.
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