| Author |
Message |
Dale Waller (Happycampersrus)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, June 28, 2006 - 11:12 pm: | |
I bought a vdo tach from e place. The sticker reads first line 1 211 004 243, second line 333 006B, third line 12 volt 0340. This is a 3000 rpm tach. The directions that were sent with it are not correct. They are for one with a pot. I have tried to contact VDO, but they are not to cooperative. (won't by no more of their stuff)
This one has 8 dip switches on the back. I can find instructions all day long for one with 3 switches, but I don't think the instructions will help me (too many switches on mine).
Does anyone know for sure what the setting is for 12 pulses??? |
motorcoach1
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, June 29, 2006 - 1:46 am: | |
the generator or simply put the pickup will generate the time sequence that the tach receives so as to say 4 pick ups send the tach 4 messages per revaluation of one revolution cycle this intern sends the message to the tach and it multiplyes the signal to Rom's hope this helps.. did you down load the VDO spec sheet on the tach.. if youe give me the part no# i will look into it and work it out if i can help and what voltage you operate your coach on and is the voltage regulated or droped from 24 volts ..make sure it's a vdo oem |
motorcoach1
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, June 29, 2006 - 1:48 am: | |
oh by the way that tach uses a shunt to the voltage ..did you get the shunt set with it |
Dale Waller (Happycampersrus)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, June 29, 2006 - 7:45 am: | |
Right, I understand how they work. I have some electronics in my back ground. The part number is in my first post. I think it's the 333 006B that is the #'s on the sticker and box. They sent me the directions for a tach with a pot or potentiometer.
The reason I bought this tach was it is only a 12 volt unit and my bus is a 12 volt bus. Shouldn't need a shunt as I should be able to connect to the "R" terminal directly.
All I need to know is how to set the 8 dip switch tach to 12 pulses per rev.
VDO has sucky customer service I already don't recommend their crap and this is my first and probably last VDO gauge. The only instructions I can find are on a tach with 3 switches for setup. Will those settings work?? Who knows?? Hate to try that setting just to watch the gauge needle make 12 revs. |
david anderson (Davidanderson)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, June 29, 2006 - 8:24 pm: | |
Dale,
I went through this baloney with VDO also on the same tach. I never could get the proper dip switch settings to run off the R terminal on my Eagle. I finally bought a tach generator impulse sending unit #340-020 (2" long) or 340-021 (3" long)and screwed it into the flywheel hole on the bottom of my DD 6v92. I can't remember the length. I still had to get the pulse count from VDO to set it to the tooth count on my flywheel which I still have if needed.
Now, for you, I remember someone on the board years ago knew the pulse count for an R terminal on a 12 volt alternator. They posted it here or on the MAK board.
Someone post in to help him out if you remember.
Do a search on this board for "Tach pulse count" or similar to see if it comes up.
I still think you will have to get a dip setting from VDO.
Here are some old numbers I have in my file from my misery with VDO
Siemens VDO 800-265-1818
cust service 800-564-5066
540-665-0100
Sales support 800-338-2144
Instrument sales 248-209-4000
And one more with no reference 540-723-8063
It was 4 years ago that I called these folks so I don't know if these numbers are good or not.
VDO was sold to Siemens when I had my problem so I had to call a lot of people to finally find the right person.
Good luck
David |
Dale Waller (Happycampersrus)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, June 29, 2006 - 8:59 pm: | |
Thanks Motorcoach & David,
I hooked up a mechanical tach at the same time as used some jumpers to hook up the VDO and played with the switches. This is connected to the "R" terminal.
I got the dip switches as follows
1 on
2 off
3 off
4 off
5 on
6 on
7 off
8 off
Maybe if someone else needs the info it will be in the archives.
Thanks again. |
motorcoach1
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, June 29, 2006 - 9:27 pm: | |
That sounds great .. i did"nt have much time today to research it so I'm happy to see it working, |
motorcoach1
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, June 29, 2006 - 9:35 pm: | |
I have found that VDO gages are sensitive to voltage fluctuations , so when this starts happening check your alternator and grounds,,, good luck,, these guages don"t have built in voltage regulators so they get wiped out easly. you may want to add one in the circut |