BLDI Pressure Gauge Model Classification Tool

A VBA-based Excel tool for classifying pressure gauge model codes into product categories.

Features

• Automatic Classification: Classifies model codes into 9 product categories
• High Performance: Uses bulk array operations for fast processing (1000+ records in seconds)
• Priority-Based Logic: Implements a decision funnel classification system
• Comprehensive Testing: Includes full test suite with PRD validation

Categories (Priority Order)

1. 喷涂产品 (Spray-coated) - Highest priority
2. 卫生型隔膜表 (Sanitary diaphragm)
3. 隔膜表 (Diaphragm)
4. 差压表 (Differential pressure)
5. 膜盒压力表 (Capsule)
6. 精密压力表 (Precision)
7. 电接点压力表 (Electric contact)
8. 常规表 (Regular)
9. 其他 (Other) - Default

File Structure

VBA/
├── ClassModules/
│   └── GaugeClassifier.cls     # Core classification logic
└── Modules/
    ├── MainModule.bas           # Excel I/O interface
    └── TestModule.bas           # Test suite

Installation

Method 1: Import VBA Files (Recommended)

1. Open your Excel workbook
2. Press Alt + F11 to open VBA Editor
3. In the VBA Editor:
   • Go to File → Import File
   • Import VBA/ClassModules/GaugeClassifier.cls
   • Import VBA/Modules/MainModule.bas
   • Import VBA/Modules/TestModule.bas
4. Save your workbook as Excel Macro-Enabled Workbook (.xlsm)

Method 2: Copy Code Manually

1. Open VBA Editor (Alt + F11)
2. Insert Class Module: Insert → Class Module, name it GaugeClassifier
3. Copy contents of GaugeClassifier.cls to the class module
4. Insert Standard Module: Insert → Module
5. Copy contents of MainModule.bas to the module
6. Insert another Standard Module for tests
7. Copy contents of TestModule.bas to the test module

Usage

Quick Start

1. Enter model codes in column A (starting from A2)

   A              B
   ┌────────────────────────────────────┐
   1 │ 型号代码       │ 产品分类    │
   ├────────────────────────────────────┤
   2 │ PYTH-100.A0...│              │
   3 │ Y-040.Z0.200..│              │
   └────────────────────────────────────┘
   

2. Run classification:

   • Press Alt + F8
   • Select RunClassification
   • Click Run

3. View results in column B

Alternative Methods

Selection-based Classification

1. Select cells containing model codes
2. Run RunClassificationOnSelection
3. Results appear in adjacent column

Clear Results

• Run ClearClassifications to remove classifications

Testing

Run All Tests

1. Press Alt + F11 to open VBA Editor
2. Press Ctrl + G to open Immediate Window
3. Run TestClassifierLogic
4. View results in Immediate Window

Individual Test Functions

Function	Description
TestClassifierLogic()	Run all PRD test cases (12 tests)
TestParsingMethods()	Test string parsing methods
TestPerformance()	Performance benchmark (1000 records)
TestSingleInput()	Interactive single input test

Test Cases

All test cases from the PRD are validated:

#	Input	Expected
1	PYTH-100.A0.531.M201.M02|BP-088.2312.M02.0A3|FBP-251040...	喷涂产品
2	PYTH-063.A0.513.M05.U38.F6A.K15.1.1|BP-058.1509.M05.BB2.F6	卫生型隔膜表
3	PYTH-063.A0.513.M05.U38.F6BP.K15.1.1|BP-058.1509.M05.BB2.F6	喷涂产品
4	PYTH-063.A0.513.M201.M09|BP-058.1509.M09.0A2|FC-1520...	隔膜表
5	PYXHN-100.A0.531.M201.M09.H4|BP-088.2518.M09.0A3.YXH|F5...	隔膜表
6	YCSH-100.A0.531.M201.M07|BP-088.2312.M07.0A3.YCS	差压表
7	YE-070.A0.204.G144.K21|BP-058.1509.K21.0A2	膜盒压力表
8	YB-120.A0.407.Z144.M23|BP-110.5250.P60.0A5	精密压力表
9	YX-100.A0.200.M204.M16.H4|BP-098.0088.M16.0A3.YX	电接点压力表
10	Y-040.Z0.200.M104.M07|BP-037.1007.M07.0A2	常规表
11	Y-100.BT.200.M204.M12|BP-098.0088.B17.PA3	常规表
12	`` (empty)	其他

Classification Logic

String Structure

Model code format: [表头]|[表盘]|[附件]|[法兰隔膜]

Parsing Rules

Component	Description	Example
Head	Everything before first |	PYTH-100.A0.531.M201.M06
Main Model	First word before - in head	PYTH
Flange	Last section if starts with F	FBP-251040.RF1.049.13...

Classification Rules

1. Spray-coated (喷涂产品)

   • Flange ends with P OR head contains F6AP/F6BP

2. Sanitary Diaphragm (卫生型隔膜表)

   • Head contains F6A or F6B (excluding spray variants)

3. Diaphragm (隔膜表)

   • Main model starts with P

4. Differential Pressure (差压表)

   • Main model starts with YC

5. Capsule (膜盒压力表)

   • Main model starts with YE

6. Precision (精密压力表)

   • Main model starts with YB

7. Electric Contact (电接点压力表)

   • Main model starts with YX

8. Regular (常规表)

   • Main model starts with Y

9. Other (其他)

   • Everything else (including empty strings)

Performance

Typical performance on standard hardware:

• 100 records: ~0.01 seconds
• 1,000 records: ~0.05 seconds
• 10,000 records: ~0.5 seconds

Uses bulk array operations (Value2) for optimal performance.

Troubleshooting

"No data found" error

• Ensure data starts from cell A2
• Check that column A contains model codes

Runtime error 1004

• Make sure workbook is saved as .xlsm (macro-enabled)
• Check macro security settings: File → Options → Trust Center → Trust Center Settings → Macro Settings

Incorrect classifications

• Verify model code format matches expected structure
• Check for extra spaces or special characters
• Run TestClassifierLogic() to validate classifier logic

API Reference

GaugeClassifier Class

Method	Description
Classify(modelString) As String	Main classification entry point
GetHead(fullString) As String	Extract head section
GetFlange(fullString) As String	Extract flange section
GetMainModel(headString) As String	Extract main model prefix

MainModule Functions

Sub	Description
RunClassification()	Process all data in column A
RunClassificationOnSelection()	Process selected cells
ClearClassifications()	Clear results in column B

License

Internal tool for BLDI pressure gauge classification.

Support

For issues or questions, refer to the PRD or contact development team.