Harry Flatters Posted April 24, 2003 Share Posted April 24, 2003 I need a favour from someone who has one of the later fuel tank senders (96' on) designed for the Caterham guages, NOT the VDO ones. What I need to know is the resistence reading (between the terminal on top of the sender and the mounting plate) when the float is in the lowest position i.e. empty, and at it's highest position i.e. when it's full. Can anyone help me out here. Here's hoping. *arrowright*Harry Flatters *arrowright* AKA Steve Mell of Su77on Se7ens and Joint AO - Surrey Link to comment Share on other sites More sharing options...
Harry Flatters Posted April 25, 2003 Author Share Posted April 25, 2003 So that's a no then ☹️ *arrowright*Harry Flatters *arrowright* AKA Steve Mell of Su77on Se7ens and Joint AO - Surrey Link to comment Share on other sites More sharing options...
Peter T Posted April 25, 2003 Share Posted April 25, 2003 You could allways use a stick steve, and when you see your friend in the park with his dog the stick could be very usefull On The Starting Blocks! Link to comment Share on other sites More sharing options...
Harry Flatters Posted April 25, 2003 Author Share Posted April 25, 2003 Not quite the hight tech solution I had in mind Pete 😬 *arrowright*Harry Flatters *arrowright* AKA Steve Mell of Su77on Se7ens and Joint AO - Surrey Link to comment Share on other sites More sharing options...
Peter T Posted April 25, 2003 Share Posted April 25, 2003 Allways keen to voice my opinion 😬 On The Starting Blocks! Link to comment Share on other sites More sharing options...
Mark Durrant Posted April 25, 2003 Share Posted April 25, 2003 Harry I need to remove my sender unit to make some crude changes so that the guage reads a little more accurately. If you have a an ammeter your more then welcome to pop in and take some readings. Enjoy tonight Mark D Su77on Se7ens Avoiding the Kerbs Link to comment Share on other sites More sharing options...
Harry Flatters Posted April 25, 2003 Author Share Posted April 25, 2003 Cheers Mark. Are you in at the weekend and I guess more importantly will you have whipped it out by then Oooer missus ❗ *arrowright*Harry Flatters *arrowright* AKA Steve Mell of Su77on Se7ens and Joint AO - Surrey Link to comment Share on other sites More sharing options...
Mark Durrant Posted April 25, 2003 Share Posted April 25, 2003 Harry Lumberjacking on Saturday and trailering James to a sprint on Sunday but its only in Chertsey so should not be back too late, so is late Sunday afternoon any good to you 🤔 I will not have whipped out by then but it shouldn't take too long unless you know otherwise ❗ Mark D Su77on Se7ens Avoiding the Kerbs Link to comment Share on other sites More sharing options...
Miraz Posted April 25, 2003 Share Posted April 25, 2003 Full 16.8 Ohms Empty 198 Ohms Or something close to that.. Link to comment Share on other sites More sharing options...
Harry Flatters Posted April 25, 2003 Author Share Posted April 25, 2003 Miraz, What a cracking fellow you are. Many thanks for that *thumbup* *arrowright*Harry Flatters *arrowright* AKA Steve Mell of Su77on Se7ens and Joint AO - Surrey Link to comment Share on other sites More sharing options...
Miraz Posted April 27, 2003 Share Posted April 27, 2003 That was the official answer from Caterham, I'm becoming increasingly sceptical about its accuracy though....I've been using these numbers for calibration and seem to get a zero reading with about 8 liters left in the tank. I'm going to try draining my tank and taking a few measurements with known quantities of fuel. Link to comment Share on other sites More sharing options...
neilsjuke Posted April 27, 2003 Share Posted April 27, 2003 tank senders are just restance wire so when the arm is fully over there will be no restance Link to comment Share on other sites More sharing options...
Miraz Posted May 14, 2003 Share Posted May 14, 2003 After getting some very strange result I decided to calibrate it properly by adding known amounts of fuel to an empty tank and measuring the resistance across the sender. Empty - 275 Ohms 5 Liters - 270 Ohms (approx) 10 Liters - 249 Ohms 15 Liters - 150 Ohms (approx) 20 Liters - 59 Ohms 30 Liters - 31 Ohms 40 Liters - 14 Ohms I can't claim these numbers are gospel, but they are a lot more accurate than the numbers received from Caterham. Link to comment Share on other sites More sharing options...
Chelspeed Posted May 14, 2003 Share Posted May 14, 2003 Is that for an SV tank? I presume the tank is wider? If it is then each ohm (well fall in ohms) will be less litres in a normal tank. Link to comment Share on other sites More sharing options...
Miraz Posted May 14, 2003 Share Posted May 14, 2003 Sorry - should have mentioned that the numbers are for an SV tank Link to comment Share on other sites More sharing options...
Chris W Posted May 14, 2003 Share Posted May 14, 2003 It's interesting to graph those results. The only linear portion is from around 10 litres to 20 litres. So the gauge will appear to drop gently from 40 litres to 20 litres and then plummet and then ease off again at 10 litres. Chris 1.8K SV 140hp see it here Edited by - Chris W on 14 May 2003 20:16:25 Link to comment Share on other sites More sharing options...
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