def initWorkFormat(self):
        """ Initialize :class:`~ekmmeters.SerialBlock` for V3 read. """
        self.m_blk_a["reserved_10"] = [1, FieldType.Hex, ScaleType.No, "", 0, False, False]
        self.m_blk_a[Field.Model] = [2, FieldType.Hex, ScaleType.No, "", 0, False, True]
        self.m_blk_a[Field.Firmware] = [1, FieldType.Hex, ScaleType.No, "", 0, False, True]
        self.m_blk_a[Field.Meter_Address] = [12, FieldType.String, ScaleType.No, "", 0, False, True]
        self.m_blk_a[Field.kWh_Tot] = [8, FieldType.Float, ScaleType.KWH, "", 0, False, False]
        self.m_blk_a[Field.kWh_Tariff_1] = [8, FieldType.Float, ScaleType.KWH, "", 0, False, False]
        self.m_blk_a[Field.kWh_Tariff_2] = [8, FieldType.Float, ScaleType.KWH, "", 0, False, False]
        self.m_blk_a[Field.kWh_Tariff_3] = [8, FieldType.Float, ScaleType.KWH, "", 0, False, False]
        self.m_blk_a[Field.kWh_Tariff_4] = [8, FieldType.Float, ScaleType.KWH, "", 0, False, False]
        self.m_blk_a[Field.Rev_kWh_Tot] = [8, FieldType.Float, ScaleType.KWH, "", 0, False, False]
        self.m_blk_a[Field.Rev_kWh_Tariff_1] = [8, FieldType.Float, ScaleType.KWH, "", 0, False, False]
        self.m_blk_a[Field.Rev_kWh_Tariff_2] = [8, FieldType.Float, ScaleType.KWH, "", 0, False, False]
        self.m_blk_a[Field.Rev_kWh_Tariff_3] = [8, FieldType.Float, ScaleType.KWH, "", 0, False, False]
        self.m_blk_a[Field.Rev_kWh_Tariff_4] = [8, FieldType.Float, ScaleType.KWH, "", 0, False, False]
        self.m_blk_a[Field.RMS_Volts_Ln_1] = [4, FieldType.Float, ScaleType.Div10, "", 0, False, False]
        self.m_blk_a[Field.RMS_Volts_Ln_2] = [4, FieldType.Float, ScaleType.Div10, "", 0, False, False]
        self.m_blk_a[Field.RMS_Volts_Ln_3] = [4, FieldType.Float, ScaleType.Div10, "", 0, False, False]
        self.m_blk_a[Field.Amps_Ln_1] = [5, FieldType.Float, ScaleType.Div10, "", 0, False, False]
        self.m_blk_a[Field.Amps_Ln_2] = [5, FieldType.Float, ScaleType.Div10, "", 0, False, False]
        self.m_blk_a[Field.Amps_Ln_3] = [5, FieldType.Float, ScaleType.Div10, "", 0, False, False]
        self.m_blk_a[Field.RMS_Watts_Ln_1] = [7, FieldType.Int, ScaleType.No, "", 0, False, False]
        self.m_blk_a[Field.RMS_Watts_Ln_2] = [7, FieldType.Int, ScaleType.No, "", 0, False, False]
        self.m_blk_a[Field.RMS_Watts_Ln_3] = [7, FieldType.Int, ScaleType.No, "", 0, False, False]
        self.m_blk_a[Field.RMS_Watts_Tot] = [7, FieldType.Int, ScaleType.No, "", 0, False, False]
        self.m_blk_a[Field.Cos_Theta_Ln_1] = [4, FieldType.PowerFactor, ScaleType.No, "", 0, False, False]
        self.m_blk_a[Field.Cos_Theta_Ln_2] = [4, FieldType.PowerFactor, ScaleType.No, "", 0, False, False]
        self.m_blk_a[Field.Cos_Theta_Ln_3] = [4, FieldType.PowerFactor, ScaleType.No, "", 0, False, False]
        self.m_blk_a[Field.Max_Demand] = [8, FieldType.Float, ScaleType.KWH, "", 0, False, True]
        self.m_blk_a[Field.Max_Demand_Period] = [1, FieldType.Int, ScaleType.No, "", 0, False, True]
        self.m_blk_a[Field.Meter_Time] = [14, FieldType.String, ScaleType.No, "", 0, False, False]
        self.m_blk_a[Field.CT_Ratio] = [4, FieldType.Int, ScaleType.No, "", 0, False, True]
        self.m_blk_a[Field.Pulse_Cnt_1] = [8, FieldType.Int, ScaleType.No, "", 0, False, False]
        self.m_blk_a[Field.Pulse_Cnt_2] = [8, FieldType.Int, ScaleType.No, "", 0, False, False]
        self.m_blk_a[Field.Pulse_Cnt_3] = [8, FieldType.Int, ScaleType.No, "", 0, False, False]
        self.m_blk_a[Field.Pulse_Ratio_1] = [4, FieldType.Int, ScaleType.No, "", 0, False, True]
        self.m_blk_a[Field.Pulse_Ratio_2] = [4, FieldType.Int, ScaleType.No, "", 0, False, True]
        self.m_blk_a[Field.Pulse_Ratio_3] = [4, FieldType.Int, ScaleType.No, "", 0, False, True]
        self.m_blk_a[Field.State_Inputs] = [3, FieldType.Int, ScaleType.No, "", 0, False, True]
        self.m_blk_a["reserved_11"] = [19, FieldType.Hex, ScaleType.No, "", 0, False, False]
        self.m_blk_a[Field.Status_A] = [1, FieldType.Hex, ScaleType.No, "", 0, False, False]
        self.m_blk_a["reserved_12"] = [4, FieldType.Hex, ScaleType.No, "", 0, False, False]
        self.m_blk_a["crc16"] = [2, FieldType.Hex, ScaleType.No, "", 0, False, False]
        self.m_blk_a[Field.Power_Factor_Ln_1] = [4, FieldType.Int, ScaleType.No, "0", 0, True, False]
        self.m_blk_a[Field.Power_Factor_Ln_2] = [4, FieldType.Int, ScaleType.No, "0", 0, True, False]
        self.m_blk_a[Field.Power_Factor_Ln_3] = [4, FieldType.Int, ScaleType.No, "0", 0, True, False]