diff --git a/src/calculation.rs b/src/calculation.rs
index 93b8d07..45bcce5 100644
--- a/src/calculation.rs
+++ b/src/calculation.rs
@@ -4,6 +4,44 @@ use core::time::Duration;
 /// Calculates values needed or returned by the BME80 Sensor.
 pub struct Calculation {}
 
+static GAS_LOOKUP_TABLE_1: [u32; 16] = [
+    2147483647u32,
+    2147483647u32,
+    2147483647u32,
+    2147483647u32,
+    2147483647u32,
+    2126008810u32,
+    2147483647u32,
+    2130303777u32,
+    2147483647u32,
+    2147483647u32,
+    2143188679u32,
+    2136746228u32,
+    2147483647u32,
+    2126008810u32,
+    2147483647u32,
+    2147483647u32,
+];
+
+static GAS_LOOKUP_TABLE_2: [u32; 16] = [
+    4096000000u32,
+    2048000000u32,
+    1024000000u32,
+    512000000u32,
+    255744255u32,
+    127110228u32,
+    64000000u32,
+    32258064u32,
+    16016016u32,
+    8000000u32,
+    4000000u32,
+    2000000u32,
+    1,
+    500000u32,
+    250000u32,
+    125000u32,
+];
+
 impl Calculation {
     /// Calculates and returns the sensor's heater resistance.
     /// * `calibration_data` - The calibration data of the sensor.
@@ -154,47 +192,11 @@ impl Calculation {
         gas_resistance_adc: u16,
         gas_range: u8,
     ) -> u32 {
-        let lookup_table1: [u32; 16] = [
-            2147483647u32,
-            2147483647u32,
-            2147483647u32,
-            2147483647u32,
-            2147483647u32,
-            2126008810u32,
-            2147483647u32,
-            2130303777u32,
-            2147483647u32,
-            2147483647u32,
-            2143188679u32,
-            2136746228u32,
-            2147483647u32,
-            2126008810u32,
-            2147483647u32,
-            2147483647u32,
-        ];
-        let lookup_table2: [u32; 16] = [
-            4096000000u32,
-            2048000000u32,
-            1024000000u32,
-            512000000u32,
-            255744255u32,
-            127110228u32,
-            64000000u32,
-            32258064u32,
-            16016016u32,
-            8000000u32,
-            4000000u32,
-            2000000u32,
-            1,
-            500000u32,
-            250000u32,
-            125000u32,
-        ];
         let var1: i64 = ((1340 + 5 * calibration_data.range_sw_err as i64)
-            * lookup_table1[gas_range as usize] as i64)
+            * GAS_LOOKUP_TABLE_1[gas_range as usize] as i64)
             >> 16;
         let var2: u64 = (((gas_resistance_adc as i64) << 15) - 16777216 + var1) as u64;
-        let var3: i64 = (lookup_table2[gas_range as usize] as i64 * var1) >> 9;
+        let var3: i64 = (GAS_LOOKUP_TABLE_2[gas_range as usize] as i64 * var1) >> 9;
         let calc_gas_res: u32 = ((var3 + ((var2 as i64) >> 1i64)) / var2 as i64) as u32;
         calc_gas_res
     }