[volt-nuts] How to wire a serial cable for a Solartron 7151

[David C. Partridge]

I had a syuggestion from a guy at Ametek to try Parity None even though the 7151 is set to parity "Space".

CESTART AT 15.48.24 ON 25.01.00 VERSION BB.BA CAL GOOD
+.1314170  V DC
+.1345240  V DC
+.1375090  V DC
+.1404000  V DC
+.1431960  V DC
+.1459540  V DC
+.1487910  V DC
+.1516270  V DC
+.1544780  V DC
+.1573250  V DC
+.1601460  V DC
+.1629090  V DC

Yes!

Dave
-----Original Message-----
From: volt-nuts-bounces at febo.com [mailto:volt-nuts-bounces at febo.com] On Behalf Of Fabio Eboli
Sent: 15 April 2012 07:01
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] How to wire a serial cable for a Solartron 7151

You could try RealTerm, I've used it with win XP, it permits to have much more control on signals and data.

Fabio.

"David C. Partridge" <david.partridge at perdrix.co.uk> ha scritto:

> Yeah could be the bit order in the bytes, but how to tell one or the 
> other to accommodate that?  If I need a different terminal program 
> then please point me in the right direction.
>
> I thought serial comms always sent the bits of a byte in the same 
> order (high bit first I think).
>
> Dave
> -----Original Message-----
> From: volt-nuts-bounces at febo.com [mailto:volt-nuts-bounces at febo.com]
> On Behalf Of m k
> Sent: 14 April 2012 19:06
> To: volt-nuts at febo.com
> Subject: Re: [volt-nuts] How to wire a serial cable for a Solartron 
> 7151
>
>
> Hi Dave,
>
> bigendian-littlendian problem perhaps?
>
> MK
>
>> From: david.partridge at perdrix.co.uk
>> To: volt-nuts at febo.com
>> Date: Sat, 14 Apr 2012 18:19:58 +0100
>> Subject: Re: [volt-nuts] How to wire a serial cable for a Solartron
>> 7151
>>
>> Hmmmm I may be getting somewhere. but not quite sure where.
>>
>> I swapped Tx and Rx, RTS and CTS so I had a very basic null-modem 
>> connection.
>>
>> With the DIP switches set for 9600 baud, Space Parity and 2 stop bits.
>>
>> I set Hyperterminal up for 9600,8,S,2
>>
>> When I connect I now get output from the meter, but it is garbage.
>>
>> Knpxpywpp`@6`
>> knpxtwvyp@`@
>> KNpxxtvtp``6@
>> kNpyrpqtp@`6@
>> kNpyututp@`@
>> KNpyypvup`@6`
>> KNqpruuyp`@6`
>> kNqpvpwwp``6@
>>
>> If I set hyperterminal to any other settings I get nothing at all.
>>
>> This almost sounds like the problem that people who use TTL serial 
>> have with inverted logic levels.
>>
>> The problem is identical if I try with another 7151.
>>
>> Dave
>> -----Original Message-----
>> From: volt-nuts-bounces at febo.com [mailto:volt-nuts-bounces at febo.com]
>> On Behalf Of David C. Partridge
>> Sent: 14 April 2012 14:24
>> To: 'Discussion of precise voltage measurement'
>> Subject: [volt-nuts] How to wire a serial cable for a Solartron 7151
>>
>> I'm trying to communicate with a Solartron 7151 using RS232 and failing.
>>
>> I've made up a cable DB9 to DB15 wired straight through based on the 
>> information on page 6.6 of the user manual which shows the pin 
>> assignments of the DB15 connector on the back of the DMM.
>>
>> DB9 Pin 1 DCD not connected
>> DB9 Pin 2 RxD to DB15 Pin 3
>> DB9 Pin 3 TxD to DB15 Pin 2
>> DB9 Pin 4 DTR to DB15 Pin 15
>> DB9 Pin 5 GND to DB15 Pin 7
>> DB9 Pin 6 DSR not connected
>> DB9 Pin 7 RTS to DB15 Pin 4
>> DB9 Pin 8 CTS to DB15 Pin 5
>> DB9 Pin 9 RI  not connected
>>
>> I didn't connect DB15 Pin 10 to anything, as there is nothing on a
>> DB9 that provides Receive Clock - all my serial ports are DB9.
>>
>> Unfortunately it doesn't work.
>>
>> If anyone knows how it should be wired, please could they let me know?
>>
>> Thanks
>> Dave
>>
>>
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