Uses bias in test

dev/test_2_mux_2024.py

@@ -48,7 +48,11 @@ if within_ohmpi:
     k._hw.switch_mux([1, 4, 2, 3], state='on')
     k._hw.vab_square_wave(12,1)
     k._hw.switch_mux([1, 4, 2, 3], state='off')
-    print(f'Resistance: {k._hw.last_rho :.2f}, dev. {k._hw.last_dev:.2f} %')
+    k._hw.calibrate_rx_bias()  # electrodes 1 4 2 3 should be connected to a reference circuit
+    k._hw.switch_mux([1, 4, 2, 3], state='on')
+    k._hw.vab_square_wave(12,1)
+    k._hw.switch_mux([1, 4, 2, 3], state='off')
+    print(f'Resistance: {k._hw.last_rho :.2f} ohm, dev. {k._hw.last_dev:.2f} %, rx bias: {k._hw.rx._bias:.2f} ohm')
     k._hw._plot_readings()
     plot_exec_log('ohmpi/logs/exec.log')
 change_config('../configs/config_default.py', verbose=False)
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