diff --git a/apps/em/migrations/0006_alter_equipment_number_factory.py b/apps/em/migrations/0006_alter_equipment_number_factory.py
new file mode 100644
index 00000000..afdfcaa2
--- /dev/null
+++ b/apps/em/migrations/0006_alter_equipment_number_factory.py
@@ -0,0 +1,18 @@
+# Generated by Django 3.2.12 on 2023-10-31 03:16
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('em', '0005_auto_20230906_1431'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='equipment',
+            name='number_factory',
+            field=models.CharField(blank=True, default='', max_length=50, verbose_name='出厂编号'),
+        ),
+    ]
diff --git a/apps/em/models.py b/apps/em/models.py
index 9d32185e..2921010d 100644
--- a/apps/em/models.py
+++ b/apps/em/models.py
@@ -3,6 +3,8 @@ from apps.utils.models import CommonBModel, CommonADModel, CommonAModel
 from apps.system.models import User
 
 # Create your models here.
+
+
 class Equipment(CommonBModel):
     """
     设备台账信息
@@ -14,12 +16,12 @@ class Equipment(CommonBModel):
     EQUIP_STATE_DISABLE = 40
     EQUIP_STATE_SCRAP = 50
     state_choices = (
-          (EQUIP_STATE_OK, '完好'),
-          (EQUIP_STATE_LIMIT, '限用'),
-          (EQUIP_STATE_FIX, '在修'),
-          (EQUIP_STATE_DISABLE, '禁用'),
-          (EQUIP_STATE_SCRAP, '报废')
-          
+        (EQUIP_STATE_OK, '完好'),
+        (EQUIP_STATE_LIMIT, '限用'),
+        (EQUIP_STATE_FIX, '在修'),
+        (EQUIP_STATE_DISABLE, '禁用'),
+        (EQUIP_STATE_SCRAP, '报废')
+
     )
     EQUIP_TYPE_PRO = 10
     EQUIP_TYPE_MEA = 20
@@ -35,25 +37,29 @@ class Equipment(CommonBModel):
     # way_choices = (
     #      (1, '外检'),
     #      (2, '自检'),
-        
+
     # )
     # usetype_choices = (
     #      (1, '专用'),
     #      (2, '公用'),
     # )
-    type = models.PositiveSmallIntegerField('类型', choices=type_choices, default=10)
+    type = models.PositiveSmallIntegerField(
+        '类型', choices=type_choices, default=10)
     name = models.CharField('设备名称', max_length=50)
-    number_factory = models.CharField('出厂编号', max_length=50)
+    number_factory = models.CharField(
+        '出厂编号', max_length=50, default='', blank=True)
     number = models.CharField('设备编号', max_length=50, unique=True)
     model = models.CharField('规格型号', max_length=60, default='', blank=True)
     factory = models.CharField('生产厂', max_length=50, default='', blank=True)
     production_date = models.DateField('生产日期', null=True, blank=True)
     buy_date = models.DateField('购置日期', null=True, blank=True)
-    state = models.PositiveIntegerField('设备状态', choices=state_choices, default=EQUIP_STATE_OK)
+    state = models.PositiveIntegerField(
+        '设备状态', choices=state_choices, default=EQUIP_STATE_OK)
     parameter = models.TextField('技术参数', default='', blank=True)
     place = models.CharField('安装/存放位置', max_length=50, default='', blank=True)
     count = models.PositiveIntegerField('数量', default=1)
-    keeper = models.ForeignKey(User, verbose_name='责任人', on_delete=models.CASCADE, null=True, blank=True)
+    keeper = models.ForeignKey(
+        User, verbose_name='责任人', on_delete=models.CASCADE, null=True, blank=True)
     description = models.CharField('描述', max_length=200, default='', null=True)
 
     # 以下是计量检测设备单独字段
@@ -61,13 +67,16 @@ class Equipment(CommonBModel):
     # usetype  = models.IntegerField('使用类别', choices=usetype_choices, default=1)
     # way  = models.IntegerField('校准或检定方式', choices=way_choices, default=1)
     # standard = models.CharField('溯源标准或依据', max_length=200, default='', blank=True)
-    meter_type = models.CharField('仪表类型', max_length=100, null=True, blank=True)
+    meter_type = models.CharField(
+        '仪表类型', max_length=100, null=True, blank=True)
     management_level = models.CharField('管理等级', max_length=10, default='A')
-    measurement_range = models.CharField('量程范围', max_length=100, default='', blank=True)
+    measurement_range = models.CharField(
+        '量程范围', max_length=100, default='', blank=True)
     use_date = models.DateField('启用日期', null=True, blank=True)
-    cycle = models.PositiveSmallIntegerField('校准或检定周期(月)', null=True, blank=True)
+    cycle = models.PositiveSmallIntegerField(
+        '校准或检定周期(月)', null=True, blank=True)
     check_date = models.DateField('最近校准检查日期', blank=True, null=True)
-    next_check_date = models.DateField('预计下次校准检查日期',blank=True, null=True)
+    next_check_date = models.DateField('预计下次校准检查日期', blank=True, null=True)
     power_kw = models.PositiveSmallIntegerField('功率', null=True, blank=True)
 
     class Meta:
@@ -86,8 +95,10 @@ class EcheckRecord(CommonADModel):
         (10, '正常'),
         (20, '异常')
     )
-    equipment = models.ForeignKey(Equipment, verbose_name='关联设备', on_delete=models.CASCADE)
+    equipment = models.ForeignKey(
+        Equipment, verbose_name='关联设备', on_delete=models.CASCADE)
     check_organization = models.CharField('校准/检定机构', max_length=10)
     check_date = models.DateField('校准/检定日期')
     note = models.TextField('备注', null=True, blank=True)
-    result = models.PositiveSmallIntegerField('结果', default=10, choices=CHECK_CHOICES, help_text=str(CHECK_CHOICES))
\ No newline at end of file
+    result = models.PositiveSmallIntegerField(
+        '结果', default=10, choices=CHECK_CHOICES, help_text=str(CHECK_CHOICES))