Index: firmware/App/Controllers/DialOutFlow.c
===================================================================
diff -u -r15919f0c12c0047d3b6331c1f97cdad1dafb3f1b -rb66c3225a5845574b9a4214b391fff4b213e7298
--- firmware/App/Controllers/DialOutFlow.c	(.../DialOutFlow.c)	(revision 15919f0c12c0047d3b6331c1f97cdad1dafb3f1b)
+++ firmware/App/Controllers/DialOutFlow.c	(.../DialOutFlow.c)	(revision b66c3225a5845574b9a4214b391fff4b213e7298)
@@ -7,8 +7,8 @@
 *
 * @file    DialOutFlow.c
 *
-* @author  (last)      Dara Navaei
-* @date    (last)      01-Sep-2022
+* @author  (last)      Michael Garthwaite
+* @date    (last)      12-Oct-2022
 *
 * @author  (original)  Sean
 * @date    (original)  24-Jan-2020
@@ -103,9 +103,11 @@
 #define DOP_PWM_ZERO_OFFSET                     0.1F            ///< 10% PWM duty cycle = zero speed.
 
 /// Macro converts a flow rate to an estimated PWM duty cycle %.
-#define DOP_PWM_FROM_ML_PER_MIN(rate)           ( ( (rate) * 0.0009 ) + 0.0972 + DOP_PWM_ZERO_OFFSET )
+#define DOP_PWM_FROM_ML_PER_MIN(rate)           ( ( ( rate ) * 0.0009F ) + 0.0972F + DOP_PWM_ZERO_OFFSET )
 /// Conversion from PWM duty cycle % to commanded pump motor speed.
-#define DOP_PWM_TO_MOTOR_SPEED_RPM(pwm)         ( ((pwm) - DOP_PWM_ZERO_OFFSET) * 4000.0F )
+#define DOP_PWM_TO_MOTOR_SPEED_RPM(pwm)         ( ( ( pwm ) - DOP_PWM_ZERO_OFFSET) * 4000.0F )
+/// Macro converts a PWM to an estimated flow rate.
+#define DOP_ML_PER_MIN_FROM_PWM(pwm)            ( ( ( pwm - DOP_PWM_ZERO_OFFSET ) - 0.0972F ) / 0.0009F  )
 
 #define PUMP_DIR_ERROR_COUNT_MASK                0x3F           ///< Bit mask for pump direction error counter.
 #define DOP_MIN_DIR_CHECK_SPEED_RPM              10.0F          ///< Minimum motor speed before we check pump direction.
@@ -1641,4 +1643,32 @@
     return result;
 }
 
+/*********************************************************************//**
+ * @brief
+ * The testSetBloodPumpTargetDutyCycle function sets the duty cycle of the
+ * blood pump by calling setDialOutPumpTargetRate.
+ * @details Inputs: none
+ * @details Outputs: none
+ * @param value duty cycle of the dialysate outlet pump (as a percentage).
+ * @return TRUE if reset successful, FALSE if not
+ *************************************************************************/
+BOOL testSetDialOutPumpTargetDutyCycle( F32 value )
+{
+    BOOL result = FALSE;
+    F32 targetPWM = DOP_ML_PER_MIN_FROM_PWM(value) ;
+
+    if ( TRUE == isTestingActivated() )
+    {
+        // currently conversion can create negative values with values <= 10%.
+        if ( targetPWM < 0 )
+        {
+            targetPWM = 0;
+        }
+        setDialOutPumpTargetRate( (U32)targetPWM, MOTOR_DIR_FORWARD, PUMP_CONTROL_MODE_OPEN_LOOP );
+        result = TRUE;
+    }
+
+    return result;
+}
+
 /**@}*/