EIT 5150 CHLORINE MONITOR POST ADDITION DISSOLVED CL2 (mg/l Powers on. $199
 The screen displays 0.38.  

I cannot get the numbers to change.. I have no idea how this works.
Please buy as is.. 

FYI........ From the internet...

The monochromator 24 or 26 error message indicates that not enough light is getting to the detector. 24: monochromator indicates a lower light condition than 26: monochromator. Replace the lamp if it has not been replaced recently; lamps can loose intensity over time without burning out. If the lamp was just replaced, check to see if the wires from the lamp are in the light path or touching the mirror. If so, tuck the wires out of the way of the light beam and away from the lamp. If the visible lamp was replaced, check to be sure the base of the lamp bracket is fully in the recessed area; if not completely in the recessed area the lamp will be mounted at a slight angle. If the lamp has been replaced and is installed correctly but you still get the error message, the instrument will need to be serviced.


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