Product Overview
The MOEORW-WEH103 automatic water-soluble acid value tester is developed in accordance with GB/T 7598-2008 Standard Test Method for Water-Soluble Acidity of In-Service Transformer Oils. Controlled by microprocessor and equipped with a large LCD screen, the unit automatically completes heating, constant temperature incubation, oscillation, liquid sampling, pH measurement, pipeline cleaning and report printing. It supports simultaneous testing of 1–3 samples to shorten analysis cycle. A built-in USB port enables data communication with external computers for data export and storage.
Technical Specifications
|
Item |
Parameter |
|
pH Measuring Range |
3.8 ~ 7.0 |
|
Minimum Display Resolution |
0.1 pH |
|
Constant Temperature Control Accuracy |
±2 ℃ |
|
Measurement Error |
≤ ±0.1 pH |
|
Ambient Operating Temperature |
5 ℃ ~ 45 ℃ |
|
Relative Humidity Limit |
≤ 85% RH |
|
Power Supply |
AC 220 V ±10%, 50 Hz ±1 Hz |
Core Functional Features
1.Hardware & Control Design: Microprocessor automatic control system with touch LCD operation; independent 3-channel sample station for parallel testing of up to three oil samples.
2.Integrated Automatic Workflow: One-click full-process automation including heating, oscillation, static standing, liquid extraction, pH detection, data storage and printing; pre-vibration activation at 5 ℃ below target temperature to stabilize heating consistency.
3.Dual Indicator Support: Compatible with Bromocresol Green and Bromocresol Purple; built-in indicator exhaust function to eliminate pipeline air bubbles and avoid measurement deviation.
4.Data Management & Communication: Onboard storage for up to 100 groups of historical test records with query, reprint and data deletion functions; USB interface for PC data transmission.
5.Self-Cleaning & Calibration Module: Independent pipeline cleaning program for single or multiple channels; professional calibration module for pH optical correction (password-locked for factory authorized operation only).
Application Fields
Power industry: Routine detection of running transformer oil in power plants, substations and power grid maintenance stations
Petroleum & petrochemical laboratories: Quality inspection of insulating mineral oils
Third-party material testing institutions: Standard water-soluble acidity testing of electrical insulating oils
Electrical equipment manufacturing: Factory inspection of new transformer insulating oil
Compliance Standard
Comply with GB/T 7598-2008 Test Method for Water-Soluble Acidity of In-Service Transformer Oils
FAQ
Q1: Air bubbles remain in indicator pipelines before testing, how to solve?
A1: Place waste cup at No.1 position, enter Indicator Exhaust interface and run exhaust procedure for corresponding indicator until liquid flows out stably, then replace with clean test cup.
Q2: Instrument reports alarm after testing, what's the operation?
A2: The selected indicator fails detection; replace empty cup at the prompted position and restart test with the alternative indicator.
Q3: How to maintain the instrument after long-term idle state?
A3: Replace sample flasks with anhydrous ethanol and run full-channel system cleaning; replace indicator working caps with sealed caps and store indicators in cool dark environment.
Q4: Test results show unstable pH values, possible causes?
A4: Check three points: conical flask not fully clamped; sampling tube not immersed at flask bottom; containers contaminated with non-neutral residual liquid.
Q5: Is calibration operation available for daily users?
A5: Calibration interface requires factory exclusive password; unauthorized parameter input will cause measurement inaccuracy, contact manufacturer for calibration service.
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