Hanna Phosphate Checker Help

[Jason McK]

OK so I'm guessing I'm doing something wrong. But I just can't get a reading from my new Hanna Checker.

This is what I'm am interpreting the instructions to mean
1) Push button to turn on checker
2) Wait until C1 is on display and add water sample without reagent
3) Push button
4) C2 is displayed and push button again (not changing the sample)
5) 0.00 is displayed
6) swap sample with sample that has reagent
7) push and hold button to get 3 min count down
Problem is I never get 3 min count down it just goes back to C1

Anyone see where I've gone wrong?

J