diff --git a/khly6517Sup/khly6517.db b/khly6517Sup/khly6517.db
index 16151f7..d3bb467 100644
--- a/khly6517Sup/khly6517.db
+++ b/khly6517Sup/khly6517.db
@@ -17,6 +17,40 @@ record(bo, "$(P)DISABLE")
     field(ONAM, "COMMS DISABLED")
 }
 
+record(bi, "$(P)ZEROCHECK") {
+    field(DESC, "Zero-check status")
+    field(DTYP, "stream")
+    field(INP, "@khly6517.proto getZeroCheck $(PORT)")
+	field(SCAN, "2 second")
+    field(ZNAM, "OFF")
+	field(ONAM, "ON")
+}
+
+record(bo, "$(P)ZEROCHECK:SP") {
+    field(DESC, "Zero-check set")
+    field(DTYP, "stream")
+    field(OUT, "@khly6517.proto setZeroCheck $(PORT)")
+    field(ZNAM, "OFF")
+	field(ONAM, "ON")
+}
+
+record(bi, "$(P)CURR:AUTORANGE") {
+    field(DESC, "Current autorange")
+    field(DTYP, "stream")
+    field(INP, "@khly6517.proto getCurrAutorange $(PORT)")
+	field(SCAN, "2 second")
+    field(ZNAM, "OFF")
+	field(ONAM, "ON")
+}
+
+record(bo, "$(P)CURR:AUTORANGE:SP") {
+    field(DESC, "Current autorange set")
+    field(DTYP, "stream")
+    field(OUT, "@khly6517.proto setCurrAutorange $(PORT)")
+    field(ZNAM, "OFF")
+	field(ONAM, "ON")
+}
+
 record(stringin, "$(P)FUNC")
 {
     field(SCAN, "Passive")
diff --git a/khly6517Sup/khly6517.proto b/khly6517Sup/khly6517.proto
index de02eed..9bedbfa 100644
--- a/khly6517Sup/khly6517.proto
+++ b/khly6517Sup/khly6517.proto
@@ -59,3 +59,21 @@ setVoltage {
 setCurrent {
     out "FUNC CURR"
 }
+
+getZeroCheck {
+    out ":SYST:ZCH?";
+	in "%#{OFF=0|0=0|ON=1|1=1}";
+}
+
+setZeroCheck {
+    out ":SYST:ZCH %{OFF|ON}";
+}
+
+getCurrAutorange {
+    out ":SENS:CURR:RANG:AUTO?";
+	in "%#{OFF=0|0=0|ON=1|1=1}";
+}
+
+setCurrAutorange {
+    out ":SENS:CURR:RANG:AUTO %{OFF|ON}";
+}
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..496988f
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1 @@
+lewis
diff --git a/system_tests/lewis_emulators/Khly6517/device.py b/system_tests/lewis_emulators/Khly6517/device.py
index 89be23b..5df0734 100644
--- a/system_tests/lewis_emulators/Khly6517/device.py
+++ b/system_tests/lewis_emulators/Khly6517/device.py
@@ -1,21 +1,23 @@
 import queue
 import random
 from collections import OrderedDict
+from typing import Callable
 
+from lewis.core.statemachine import State
 from lewis.devices import StateMachineDevice
 
 from .states import DefaultState
 
 
 class Measurement:
-    def __init__(self, name):
+    def __init__(self, name: str) -> None:
         self.name = name
         self.range = 0
         self.values = queue.Queue()
 
 
 class SimulatedKhly6517(StateMachineDevice):
-    def _initialize_data(self):
+    def _initialize_data(self) -> None:
         self.latest_reading = 0
         self.idle = True
 
@@ -26,43 +28,46 @@ def _initialize_data(self):
 
         self.error_queue = []
 
+        self.curr_autorange = False
+        self.zero_check = False
+
         # Mock data
         self.random_mode = True
 
-    def _get_state_handlers(self):
+    def _get_state_handlers(self) -> dict[str, State]:
         return {
             "default": DefaultState(),
         }
 
-    def _get_initial_state(self):
+    def _get_initial_state(self) -> str:
         return "default"
 
-    def _get_transition_handlers(self):
+    def _get_transition_handlers(self) -> dict[tuple[str, str], Callable[[], bool]]:
         return OrderedDict([])
 
     # This command does not trigger a new reading, only return last reading
-    def fetch(self):
+    def fetch(self) -> float:
         return self.latest_reading
 
-    def abort(self):
+    def abort(self) -> None:
         self.idle = True
         self.latest_reading = 0
 
-    def initiate(self):
+    def initiate(self) -> None:
         self.idle = False
         self.measurement()
 
-    def get_selected_ranged_value(self):
+    def get_selected_ranged_value(self) -> float:
         value = self.selected_data.values.get()
         if value > self.selected_data.range:
             # Parameter data out of range
             self.add_error(-222)
         return max(min(value, self.selected_data.range), 0)
 
-    def add_random_reading(self):
+    def add_random_reading(self) -> None:
         self.selected_data.values.put(random.random() * self.selected_data.range)
 
-    def measurement(self):
+    def measurement(self) -> None:
         if self.random_mode:
             self.add_random_reading()
         if not self.selected_data.values.empty():
@@ -70,14 +75,14 @@ def measurement(self):
         else:
             self.latest_reading = 0
 
-    def add_error(self, error):
+    def add_error(self, error: int) -> None:
         if len(self.error_queue) < 9:
             self.error_queue.append(error)
         elif len(self.error_queue) == 9:
             # Queue overflow
             self.error_queue.append(-350)
 
-    def get_error(self):
+    def get_error(self) -> int:
         if len(self.error_queue) > 0:
             error = self.error_queue[0]
             self.error_queue = self.error_queue[1:]
@@ -85,13 +90,13 @@ def get_error(self):
         else:
             return 0
 
-    def clear_error_queue(self):
+    def clear_error_queue(self) -> None:
         self.error_queue = []
 
-    def add_mock_errors(self):
+    def add_mock_errors(self) -> None:
         self.add_error(2)
         self.add_error(5)
         self.add_error(10)
 
-    def insert_mock_readings(self, readings, mode):
+    def insert_mock_readings(self, readings: list[float], mode: str) -> None:
         [self.mode_dict[mode.lower()].values.put(reading) for reading in readings]
diff --git a/system_tests/lewis_emulators/Khly6517/interfaces/stream_interface.py b/system_tests/lewis_emulators/Khly6517/interfaces/stream_interface.py
index d2bb72b..1df5237 100644
--- a/system_tests/lewis_emulators/Khly6517/interfaces/stream_interface.py
+++ b/system_tests/lewis_emulators/Khly6517/interfaces/stream_interface.py
@@ -1,7 +1,13 @@
+import logging
+import typing
+
 from lewis.adapters.stream import StreamInterface
 from lewis.core.logging import has_log
 from lewis.utils.command_builder import CmdBuilder
 
+if typing.TYPE_CHECKING:
+    from ..device import SimulatedKhly6517
+
 
 @has_log
 class Khly6517StreamInterface(StreamInterface):
@@ -13,7 +19,8 @@ class Khly6517StreamInterface(StreamInterface):
         CmdBuilder("set_func").escape("FUNC '").arg("CURR|VOLT").escape(":DC'").eos().build(),
         CmdBuilder("set_rang").arg("CURR|VOLT").escape(":DC:RANG ").float().eos().build(),
         CmdBuilder("set_rang").arg("curr|volt").escape(":dc:rang ").float().eos().build(),
-        # According to the manual, SYST:ERR? and STAT:QUE? perform the same function (14-124 in manual)
+        # According to the manual, SYST:ERR? and STAT:QUE?
+        # perform the same function (14-124 in manual)
         CmdBuilder("get_err")
         .escape(":SYST")
         .optional("em")
@@ -30,26 +37,33 @@ class Khly6517StreamInterface(StreamInterface):
         .escape("?")
         .eos()
         .build(),
+        CmdBuilder("get_zero_check").escape(":SYST:ZCH?").eos().build(),
+        CmdBuilder("set_zero_check").escape(":SYST:ZCH ").any().eos().build(),
+        CmdBuilder("get_curr_autorange").escape(":SENS:CURR:RANG:AUTO?").eos().build(),
+        CmdBuilder("set_curr_autorange").escape(":SENS:CURR:RANG:AUTO ").any().eos().build(),
     }
 
     in_terminator = "\r\n"
     out_terminator = "\r\n"
 
-    def handle_error(self, request, error):
+    _device: "SimulatedKhly6517"
+    log: logging.Logger
+
+    def handle_error(self, request: str, error: Exception) -> None:
         self.log.error("An error occurred at request " + repr(request) + ": " + repr(error))
 
-    def catch_all(self, command):
+    def catch_all(self, command: str) -> None:
         pass
 
-    def get_func(self):
+    def get_func(self) -> str:
         return "{}".format(self._device.selected_data.name.upper())
 
-    def get_read(self):
+    def get_read(self) -> str:
         self._device.abort()
         self._device.initiate()
         return "{}".format(self._device.fetch())
 
-    def get_rang(self, mode):
+    def get_rang(self, mode: str) -> float:
         try:
             return self._device.mode_dict[mode.lower()].range
         except KeyError:
@@ -57,22 +71,34 @@ def get_rang(self, mode):
             self._device.add_error(-285)
             return 0
 
-    def set_rang(self, mode, rang):
+    def set_rang(self, mode: str, rang: float) -> None:
         try:
             self._device.mode_dict[mode.lower()].range = rang
         except KeyError:
             # Program syntax error
             self._device.add_error(-285)
 
-    def clear_error_queue(self):
+    def clear_error_queue(self) -> None:
         self._device.clear_error_queue()
 
-    def set_func(self, mode):
+    def set_func(self, mode: str) -> None:
         try:
             self._device.selected_data = self._device.mode_dict[mode.lower()]
         except KeyError:
             # Program syntax error
             self._device.add_error(-285)
 
-    def get_err(self):
+    def get_err(self) -> int:
         return self._device.get_error()
+
+    def get_curr_autorange(self) -> str:
+        return "ON" if self._device.curr_autorange else "OFF"
+
+    def set_curr_autorange(self, curr_autorange: str) -> None:
+        self._device.curr_autorange = curr_autorange in ("ON", 1)
+
+    def get_zero_check(self) -> str:
+        return "ON" if self._device.zero_check else "OFF"
+
+    def set_zero_check(self, zero_check: str) -> None:
+        self._device.zero_check = zero_check in ("ON", 1)
diff --git a/system_tests/tests/khly6517.py b/system_tests/tests/khly6517.py
index 8a7dfb2..8974d52 100644
--- a/system_tests/tests/khly6517.py
+++ b/system_tests/tests/khly6517.py
@@ -177,3 +177,11 @@ def test_WHEN_continuous_polling_set_THEN_read_at_intervals(self):
 
         self.button_and_check_reading("BTN:CURR", False)
         self.button_and_check_reading("BTN:VOLT", False)
+
+    def test_curr_autorange(self):
+        self.ca.assert_setting_setpoint_sets_readback("ON", "CURR:AUTORANGE")
+        self.ca.assert_setting_setpoint_sets_readback("OFF", "CURR:AUTORANGE")
+
+    def test_zero_check(self):
+        self.ca.assert_setting_setpoint_sets_readback("ON", "ZEROCHECK")
+        self.ca.assert_setting_setpoint_sets_readback("OFF", "ZEROCHECK")