Multisim and Ultiboard

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Ammeter giving the wrong reading?

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Hi all,
I'm currently at College and I've been given an assignment to do, being asked to change the resistor size on a circuit to get 1.7v on the voltmeter and collect all results in a table building up to that. Once i get over 10k ohm on the resistor (R4) my ammeter (U1) seems to show a reading i'm unsure about. Any suggestions or is it right? In lesson my lecturer changed the transistor settings but I'm unsure on what he did and i've got zero email addresses from the college for support so I'm a little stuck.

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