Re: help with temp display for my Unimog


doug wrote:
Hello everyone,
Thanks in advance for anyone who might offer some help. I have a
Unimog with a few heat sensitive areas that I would like to keep track
of. The biggest area of concern is the transmission followed by the 4
portal reduction boxes and the 2 drive axles. For the time being I'm
using my digital multimeter and what I believe to be a "K" type
thermocouple. The thermocouple thingy is zip-tied to the trans.
dipstick with the wires running into the cab. I'd like a cleaner,
more permanent solution the I could maybe monitor more systems at
once. I can get the thermocouples fairly cheaply and can probably
find a way to mount/install them easily enough. Does anyone have or
know of a way to build (I know very little electronics so go easy on
me) something to monitor several of these at once or even cycle
through them automatically or with the push of a button or turn of a
knob. A small lcd display would be nice, or some way to display it on
another screen/monitor as I'm trying to figure out a back-up camera
and could display the temp info on that monitor. It's a small 5.5
inch b&w crt display with a few inputs. I'm open to anything. cheap
and easy being impotant as I am both.

This way may be more appropriate for your situation.

Get a meter that reads the thermocouple directly. Connect all of the
negative thermocouple leads together at the negative meter terminal.
Connect each of the positive leads to one pole of a rotary switch.
Connect the common terminal from the switch to the meter positive.

Activate one sensor at a time by rotating the switch.

Luhan

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