Contec 300G - User Manual

Questions and Answers

H
Heather JohnsonJul 28, 2025
What to do if Contec 300G Medical Equipment waveform is not regular?
- A
  Andrew ReeseJul 28, 2025
  If the waveform on your Contec Medical Equipment is irregular, with waves that are too large or appear as a straight line, consider these steps: * Ensure the electrode's conductivity is optimal by using high-quality alcohol to clean both the electrode and the patient's skin where the electrode makes contact. * Check if the battery is low and charge it if necessary. * Also, verify that the electrode reed is properly clamped and that all connections are tight, including the plug between the lead and the main unit, as well as the contact between the lead and the electrode.
S
stevenbookerAug 4, 2025
How to fix baseline drift on Contec 300G Medical Equipment?
- E
  ellen14Aug 4, 2025
  If you're experiencing baseline drift with your Contec Medical Equipment, it could be due to a low battery or patient movement. Try charging the battery first. If that doesn't solve the issue, ensure the patient remains still during the measurement.
M
Mr. Patrick BrightAug 11, 2025
What to do if Contec 300G shows big disturbance and waveform disorder?
- T
  Tammy DanielsAug 11, 2025
  If your Contec Medical Equipment is showing a large disturbance and the waveform is disordered, check the lead, ground cable, and power supply to ensure they are properly connected. Also, ensure the patient is in a relaxed state, as nervousness can cause interference.
L
Leah BarryAug 18, 2025
Why is the baseline rough on my Contec 300G?
- S
  stephen71Aug 18, 2025
  A rough baseline on your Contec Medical Equipment could be due to strong alternating current interference or the patient being nervous, leading to strong EMG disturbance. To resolve this, try creating a more comfortable environment for the patient. If the sickbed is metal, consider changing it. Also, make sure the power line and lead are not parallel or too close to each other.

Summary

Chapter 1 Main Technical Specification

1.1 Work Environment & Power Supply

Specifies operating, storage, and power supply requirements.

1.2 Input & Signal Specifications

1.3 Recording & Measurement Features

1.4 Safety & Performance Specs

Outlines safety class, protection, noise limits, fuse, dimensions, and weight.

Chapter 2 Security Notice

2.1 Power and Grounding Precautions

Ensures proper power connection and grounding for safe operation.

2.2 Operational and Environmental Safety

Covers operator responsibilities, safe usage environments, and device interaction precautions.

2.3 ECG Interpretation Considerations

Chapter 4 Instrument Characteristics

4.1 Recording, Display, and Auto-Functions

4.2 Power, Safety, and Storage

Details safety class, power supply, battery capacity, data storage, and gas compatibility.

Chapter 5 ECG300 G Panel Sketch Map

5.1 Sketch Map and Component Names

5.2 Key Definition

Explains the function of each button and key on the control panel.

Chapter 6 Attention before Operating

6.1 Manual Reading Emphasis

6.2 Installation and Environment Precautions

Covers proper installation, suitable operating environments, and placement precautions.

Chapter 7 Preparation Work before Instrumentation

7.1 Connection and Grounding Checks

7.2 Patient and Electrode Setup

Chapter 8 Precaution during Operation

8.1 Constant Monitoring and Connections

Emphasizes constant monitoring of patient and instrument, and correct connections.

8.2 Post-Operation Procedures

Chapter 10 Electrode Placement

10.1 Chest Electrode Placement

Details the specific anatomical locations for placing chest electrodes (V1-V6).

10.2 Limb Electrode Placement

10.3 Electrode Connection Checklist

Chapter 11 Grounding and Power Connection

11.1 Proper Grounding Procedure

Details the importance and method of grounding the instrument for safety and interference prevention.

Chapter 12 Precaution for Battery Operation

12.1 Battery Features and Charging

12.2 Battery Status and Usage

Explains battery life, status indicators, low power behavior, and replacement criteria.

12.3 Battery Safety Warnings

Lists critical safety warnings related to battery handling and potential hazards.

Chapter 13 Control Panel and Key Instruction

13.1 Main Interface and Keypad Functions

13.2 Sampling Interface Operations

Guides users on entering and operating the ECG sampling interface, including lead and recording modes.

13.2 Key Operations in Sampling

Details how to control sampling, change leads, styles, and recording modes.

13.2 Parameter Adjustments and Printing

13.2 Sampling and Input Settings

13.4 History Archive Management

13.5 Archive Querying

13.6 Archive Review

13.6 Print and Review Settings

13.9 Sampling Settings

13.10 Analysing Parameter Settings

13.11 Print Settings

13.11 Print Settings Details

13.12 Checking Electrodes Placement

Chapter 14 Troubleshooting

14.1 Turn off Automatically

Lists potential causes and solutions for the device shutting off automatically.

14.2 AC Interference

Identifies common causes of AC interference and how to resolve them.

14.3 EMG Interference

Explains sources of EMG interference and potential remedies.

14.4 Baseline Drift

Addresses causes and solutions for baseline drift in ECG waveforms.

14.5 Troubleshooting List

Provides a table correlating phenomena, reasons, and resolve methods for common issues.

Contec 300G Specifications

General

Category	Medical Equipment
Sweep Speed	25mm/s, 50mm/s
Battery	Rechargeable lithium battery
Interface	USB
ECG Channels	3
Display	LCD
Power Supply	AC 100-240V, 50/60Hz
Lead Selection	12 leads