//Current offset for NX Internal Current Amp
var Current_Gain = 6	//Select Gain 10^6 or 10^9

var CurrentInitial = {
    "id": "park.nx.linear.dc",
    "nx": {
        "linear": {
            "preGainPower": Current_Gain,
            "postGainPower": 0,
            "currentOffset": 0
        }
    }
} 
spm.currentamp.config = CurrentInitial;
spm.sleep(200)
var Currentvalue = spm.readChannelAveraged('current', 20, 2)
var CurrentParams = {
    "id": "park.nx.linear.dc",
    "nx": {
       "linear": {
            "preGainPower": Current_Gain,
            "postGainPower": 0,
            "currentOffset": Currentvalue
        }
    }
} 
spm.currentamp.config = CurrentParams;