diff --git a/frappy_psi/SR830.py b/frappy_psi/SR830.py
index 4933382..e6d3845 100644
--- a/frappy_psi/SR830.py
+++ b/frappy_psi/SR830.py
@@ -32,15 +32,47 @@ def string_to_value(value):
 
 
 class SR830_IO(StringIO):
-    end_of_line = b'\r'  # should be <if> or <cr>
+    end_of_line = b'\r'  # should be <lf> or <cr>
     identification = [('*IDN?', r'Stanford_Research_Systems,.*')]
 
 
-class XY(HasIO):
-    xy = Parameter('X, Y', datatype=TupleOf(FloatRange(unit='V'), FloatRange(unit='V')))
+class StanfRes(HasIO):
+    def set_par(self, cmd, *args):
+        head = ','.join([cmd] + [a if isinstance(a, str) else f'{a:g}' for a in args])
+        tail = cmd.replace(' ', '? ')
+        new_tail = re.sub(r'[0-9.]+', '', tail)
+
+        reply = self.communicate(f'{head};{new_tail}')
+        result = []
+        for num in reply.split(','):
+            try:
+                result.append(float(num))
+            except ValueError:
+                result.append(num)
+        if len(result) == 1:
+            return result[0]
+        return result
+
+    def get_par(self, cmd):
+        reply = self.communicate(cmd)
+        result = []
+        for num in reply.split(','):
+            try:
+                result.append(float(num))
+            except ValueError:
+                result.append(num)
+        if len(result) == 1:
+            return result[0]
+        return result
+
+
+class XY(StanfRes):
+    value = Parameter('X, Y', datatype=TupleOf(FloatRange(unit='V'), FloatRange(unit='V')))
     amp = Parameter('oscill. amplit. control', FloatRange(4e-3, 5), unit='V', readonly=False)
     freq = Parameter('oscill. frequen. control', FloatRange(1e-3, 102000), unit='Hz', readonly=False)
     phase = Parameter('reference phase control', FloatRange(-360, 729), unit='deg', readonly=False)
+    autorange = Parameter('autorange_on', EnumType('autorange', off=0, soft=1, hard=2),
+                          readonly=False, default=0)
 
     SEN_RANGE = ['2nV', '5nV', '10nV', '20nV', '50nV', '100nV', '200nV', '500nV',
                  '1uV', '2uV', '5uV', '10uV', '20uV', '50uV', '100uV', '200uV', '500uV',
@@ -101,51 +133,57 @@ class XY(HasIO):
                     # conv_status = HasConvergence.read_status(self)
                     return status_type, status_msg
 
-    def read_xy(self):
-        reply = self.communicate('SNAP? 1, 2')
-        xy = tuple(float(x) for x in reply.split(','))
-        return xy
+    def read_value(self):
+        reply = self.get_par('SNAP? 1, 2')
+        value = tuple(float(x) for x in reply)
+        x, y = value
+        if self.autorange == 1:
+            if max(abs(x), abs(y)) >= 0.9 * self.range and self.irange < 26:
+                self.write_irange(self.irange + 1)
+            elif max(abs(x), abs(y)) <= 0.3 * self.range and self.irange > 0:
+                self.write_irange(self.irange - 1)
+        return value
 
     def read_irange(self):
-        return int(self.communicate('SENS?'))
+        return int(self.get_par('SENS?'))
 
     def read_range(self):
         idx = self.read_irange()
         name = self.SEN_RANGE[idx]
-        value = string_to_value(name)
-        return value
+        return string_to_value(name)
 
     def write_irange(self, irange):
         value = int(irange)
-        self.communicate(f'SENS {value}')
+        self.set_par(f'SENS {value}')
         return value
 
     def write_range(self, target):
         target = float(target)
         cl_idx = None
-        cl_value = float('-inf')
+        cl_value = float('inf')
 
         for idx, sen_value in enumerate(self.SEN_RANGE_values):
-            if target >= sen_value > cl_value:
-                cl_value = sen_value
-                cl_idx = idx
+            if sen_value >= target:
+                diff = sen_value - target
 
-        self.communicate(f'SENS {cl_idx}')
+                if diff < cl_value:
+                    cl_value = sen_value
+                    cl_idx = idx
+
+        self.set_par(f'SENS {cl_idx}')
         return cl_value
 
     def read_itc(self):
-        return int(self.communicate(f'OFLT?'))
+        return int(self.get_par(f'OFLT?'))
 
     def write_itc(self, itc):
         value = int(itc)
-        self.communicate(f'OFLT {value}')
-        return value
+        return self.set_par(f'OFLT {value}')
 
     def read_tc(self):
         idx = self.read_itc()
         name = self.TIME_CONST[idx]
-        value = string_to_value(name)
-        return value
+        return string_to_value(name)
 
     def write_tc(self, target):
         target = float(target)
@@ -160,31 +198,27 @@ class XY(HasIO):
                     cl_value = time_value
                     cl_idx = idx
 
-        self.communicate(f'OFLT {cl_idx}')
+        self.set_par(f'OFLT {cl_idx}')
         return cl_value
 
     def read_phase(self):
-        return float(self.communicate('PHAS?'))
+        return float(self.get_par('PHAS?'))
 
     def write_phase(self, value):
-        self.communicate(f'PHAS {value}')
-        return value
+        return self.set_par(f'PHAS {value}')
 
     def read_freq(self):
-        return float(self.communicate('FREQ?'))
+        return float(self.get_par('FREQ?'))
 
     def write_freq(self, value):
-        self.communicate(f'FREQ {value}')
-        return value
+        return self.set_par(f'FREQ {value}')
 
     def read_amp(self):
-        return float(self.communicate('SLVL?'))
+        return float(self.get_par('SLVL?'))
 
     def write_amp(self, value):
-        self.communicate(f'SLVL {value}')
-        return value
+        return self.set_par(f'SLVL {value}')
 
     def auto_phase(self):
-        return self.communicate('APHS')
-
+        return self.set_par('APHS')