Vertical Combustibility Tester GT-C35B Operating Guide

The Vertical Combustibility Tester GT-C35B is used to evaluate the flammability behavior of vertically oriented materials. It is relevant to testing workflows for fabrics and may support quality-control activities involving textiles, soft fabric toys, and protective clothing. Reliable results depend not only on the instrument itself, but also on consistent sample preparation, burner setup, airflow control, and use of the applicable test procedure.

This guide presents a structured operating sequence based on the available product information. Operators should receive suitable training and follow the requirements of the selected test method and their laboratory procedures before conducting a test.

What the Vertical Combustibility Tester GT-C35B evaluates

The GT-C35B is designed for flame-resistance evaluation of materials mounted in a vertical orientation. The supplied information identifies standards including BS EN ISO 6940, BS EN ISO 6941, BS EN ISO 15025, and BS EN ISO 14116. The required setup, exposure conditions, and assessment criteria should be determined by the specific standard being applied.

A controlled test sequence is important because sample alignment, flame direction, flame length, and ignition time can affect test consistency. Establishing a repeatable routine also makes it easier for operators to document each stage and review test data after completion.

Prepare the sample and mounting arrangement

Mark and secure the specimen

Begin by using the supplied sample splint to mark the positioning hole on the material. This step helps establish the intended placement before the specimen is attached to the sample clip. Secure the specimen carefully so that it remains aligned throughout the test.

Next, hang the sample on the tester frame. The sample should be suspended in the required vertical position. Check that the material is not twisted or loosely fitted, as an uneven position can reduce repeatability between tests.

Set the marking line mechanism

Adjust the scale line by pulling the nylon line. According to the available operating information, the micro switch is extended to approximately 5 mm for this adjustment. The nylon line should be suitably tensioned for the test procedure.

Configure the burner and flame controls

Before testing with material flammability tester, set the burner angle required for the material and method. The burner may then be fine-tuned in both vertical and horizontal directions using the machine controls, allowing the flame to be directed at the intended location on the sample.

Flame Gauge 1 (Copper) is inserted during the burner positioning and calibration stage. After this work is complete, use the return control to bring the burner back to its default position, then remove Flame Gauge 1 (Copper) before proceeding.

Open the air source and adjust the airflow to the relevant test parameters. Activate the solenoid valve so that the burner receives a consistent air supply. Ignite the burner and use the flow meter to adjust flame length. Flame Gauge 2 (Stainless Steel) is used to verify the flame length before the test starts.

Run the test and review completion

Set the ignition time for the material and selected procedure. Because materials can have different fire-resistance characteristics, this setting should match the applicable test requirements rather than being assumed from a previous sample.

Once the specimen, burner, air supply, flame length, and ignition time have been confirmed, press the start button to initiate the test. The Vertical Combustibility Tester GT-C35B then monitors the flame’s effect on the mounted material.

In the described operating sequence, the test ends when all three marking lines on the sample have burned through. Record the outcome and assess the data according to the chosen test method. If the relevant standard uses other completion or evaluation criteria, those requirements should govern the final assessment.

Maintain consistency in routine testing

A repeatable workflow helps laboratories compare results across materials and test sessions. Inspect the sample clip, nylon line, burner position, gauges, airflow setting, and programmed ignition time before each run. Operators should also ensure that the selected test method is identified before setup, since method requirements may differ.

Training and ongoing technical support can help users apply the Vertical Combustibility Tester GT-C35B consistently. By treating sample mounting, flame calibration, and test documentation as connected steps, quality-control teams can create a more disciplined approach to vertical combustibility tester.