diff --git a/cfg/senis3mh6.cfg b/cfg/senis3mh6.cfg
index b841ac2..ebefc9b 100644
--- a/cfg/senis3mh6.cfg
+++ b/cfg/senis3mh6.cfg
@@ -1,12 +1,18 @@
 [b]
 description = '3D hall sensor'
 class = secop_psi.senis.Teslameter3MH6
-usb = /dev/tty.usbserial-AI02VAD9
+usb = /dev/ttyUSB0
+nsample = 100
 x = bx
 y = by
 z = bz
 probe_temp = ptemp
 box_temp = btemp
+x_direct = dbx
+y_direct = dby
+z_direct = dbz
+probe_temp_direct = dptemp
+box_temp_direct = dbtemp
 
 [bx]
 description = 'x component'
@@ -26,4 +32,24 @@ class = secop_psi.senis.Temperature
 
 [btemp]
 description = 'box temperature'
-class = secop_psi.senis.Temperature
\ No newline at end of file
+class = secop_psi.senis.Temperature
+
+[dbx]
+description = 'x component'
+class = secop_psi.senis.Raw
+
+[dby]
+description = 'y component'
+class = secop_psi.senis.Raw
+
+[dbz]
+description = 'z component'
+class = secop_psi.senis.Raw
+
+[dptemp]
+description = 'probe temperature'
+class = secop_psi.senis.Raw
+
+[dbtemp]
+description = 'box temperature'
+class = secop_psi.senis.Temperature
diff --git a/secop_psi/senis.py b/secop_psi/senis.py
index 5dc4d80..ab2b867 100644
--- a/secop_psi/senis.py
+++ b/secop_psi/senis.py
@@ -275,7 +275,7 @@ class Teslameter3MH6(TeslameterBase):
             ranges = [self.RANGES[self.read_bytes(1)[0]]] * 3
             result = ranges[0]
         else:
-            raise ValueError('bad reply to range query')
+            raise ValueError('bad reply to range query %s' % repr(reply))
         self._x.range, self._y.range, self._z.range = ranges
         return result
 
@@ -306,8 +306,9 @@ class Teslameter3MH6(TeslameterBase):
                 if value < rng * 1.1:
                     break
             self.write_bytes(b'mr%c' % code)
-            if self.read_bytes(6) != b'mrng:%c' % code:
-                status = 'bad reply to manual range command'
+            reply = self.read_bytes(6)
+            if reply != b'mrng:%c' % code:
+                status = 'bad reply to manual range command %s' % repr(reply)
                 continue
             return rng
         raise ValueError(status)