[TRNSYS-users] what is the upper dead band in controller ?

[Jeff Thornton via TRNSYS-users]

There's a great description and picture in the documentation.  The pump will turn on when Th-Tl rises above the upper deadband and stay on until Th-Tl falls below the lower deadband.  

Jeff / TESS

Sent from my iPhone

> On Feb 5, 2017, at 11:02 PM, ahmad abbasian via TRNSYS-users <trnsys-users at lists.onebuilding.org> wrote:
> 
> Dear Ieen
> 
> I know than when the difference of Th and Tl is lower than "Lower dead band" controller sends a control signal. For example, in the following picture which is a differential controller, if the difference of Th and Tl is lower than 2 , the controller will send the control signal to turn off pump. But when the difference is higher than 5 (Upper dead band dT) and also when the difference is lower than 5 , in both cases , the pump is on. So what is the Upper dead band dT ? 
> 
> <pastedImage.png> 
> 
> 
> ..............................................................................................
> Ahmad abbasianzadeh
> Solar energy Researcher
> Harrisburg, Pensylvania
> 
> 
>  
> From: leen peeters <l.f.r.peeters at gmail.com>
> Sent: Sunday, February 5, 2017 9:18:21 AM
> To: ahmad abbasian; TRNSYS users mailing list at OneBuilding.org
> Subject: Re: [TRNSYS-users] what is the upper dead band in controller ?
>  
> Hi,
> 
> can you rephrase your question. The answer is probably easier than getting the point of your higher lower than-part 
> 
> leen
> 
>> On 5 February 2017 at 20:33, ahmad abbasian via TRNSYS-users <trnsys-users at lists.onebuilding.org> wrote:
>> Dear All
>> 
>> in a differential controller what is the upper dead band? I know that when the difference of  Th and Tl is lower than "lower dead band temperature" the controller will actand , for example , the pump will be turned off. but for the difference higher lower than "upper dead band" and also higher than it, the pump is turned on !
>> 
>> 
>> Thank you
>> 
>> 
>> ..............................................................................................
>> Ahmad abbasianzadeh
>> Solar energy Researcher
>> Pensylvania
>> <OutlookEmoji-x0yyutg5hv1.png.png>
>>  
>> 
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>> 
> 
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