Dual Canopy Mechanic Electrical Engineering Co., Ltd. is one of the leading manufacturers and suppliers of open flash point tester in China. Please feel free to wholesale discount products for sale here and get quotation from our factory. Customized orders are welcome.
What does an Open Flash Point Tester entail?
Open Flash Point Tester - Precision Ignition-Temperature Analysis for Petroleum, Power & Industrial Laboratories
Accurately determining the open-cup flash point of petroleum products, lubricating oils, transformer insulating fluids, and other combustible liquids is not optional - it is a safety-critical, regulation-mandated measurement. Our Open Flash Point Tester (Cleveland Open Cup method) delivers ±1 °C repeatability in full compliance with:
| Standard | Description |
|---|---|
| ASTM D92 | Standard Test Method for Flash and Fire Points by Cleveland Open Cup Tester |
| ISO 2592 | Petroleum and related products - Determination of flash and fire points (Cleveland open cup method) |
| GB/T 3536 | Chinese national standard for open flash point testing of petroleum products |
From what aspects should the standard requirements for routine maintenance be addressed?
Routine Maintenance (User-Level)
| Task | Frequency | Procedure |
|---|---|---|
| Clean test cup | After every test | Allow cup to cool; wipe residue with lint-free cloth and petroleum ether (60–90 °C fraction). Never use water. |
| Inspect thermocouple | Weekly | Check for discoloration, oxidation, or bent sheath. Replace if tip shows visible corrosion. |
| Check igniter spark | Weekly | Initiate a manual spark in a darkened room. Spark gap should be 2–3 mm; spark should be blue-white and consistent. |
| Wipe touchscreen | As needed | Use microfiber cloth. No solvents. |
| Verify ambient pressure reading | Monthly | Compare instrument reading to a certified barometer or local meteorological data. |
Feature Deep-Dive - What Sets This Tester Apart?
The instrument pairs an infrared flame sensor with a Type K thermocouple for flash confirmation. When the test flame sweeps the cup, the IR channel locks onto the 4.3 μm CO₂ emission band-where combustion radiates most strongly-while the thermocouple independently verifies the thermal spike. Both signals must agree before the instrument registers a valid flash.
This dual-check design solves a persistent problem with single-sensor units. Ambient light shifts-overhead fluorescents flickering, afternoon sun through a window, even a technician checking their phone-can fool an optical-only detector into a false positive. Static discharge from dry air or synthetic clothing produces the same ghost reading. The thermocouple acts as a second witness: if the IR channel triggers but temperature does not jump, the event is discarded. The result is fewer invalid readings, less retesting, and less wasted sample.
Flash point is pressure-dependent. ASTM D92 Section 11.2 requires correcting the observed flash point using the formula:
Corrected Flash Point = Observed FP + 0.033 × (101.3 − P) °C
where P = ambient pressure in kPa.
Our tester includes a built-in barometric pressure sensor (accuracy ± 0.1 kPa) and applies this correction automatically. Competitors at similar price points typically require manual entry, introducing operator error..
Over-temperature protection: If cup temperature exceeds 400 °C, the heater auto-shuts off within 0.5 seconds.
Fume extraction port(Ø 75 mm)for connection to lab ventilation.
Fire-resistant ceramic fiber insulation around the heating mantle - surface temperature remains < 60 °C during a 370 °C test.
Compliant with CE (Low Voltage Directive 2014/35/EU) and IEC 61010-1 (Safety requirements for electrical equipment for measurement).
What data is used to calibrate the Open Flash Point Tester?
Temperature Performance
Range: -59.9 °C to 399.9 °C
Control: ambient to 399.9 °C
Repeatability: ±3 °C at or below 150 °C; ±5 °C above 150 °C
Resolution: 0.1 °C
Accuracy: ±0.5 % of reading
Temperature sensing uses a Pt100 platinum resistance element. Flash detection is handled by the IR-thermocouple pair described above-not by ionization, which would respond to any electrical discharge rather than to actual combustion.
Operating Conditions
Ambient: 10 °C to 40 °C
Relative humidity: <85 %
Power: 220 V AC ±10 %
Consumption: <500 W
What advantages and benefits does this device offer users?
The hardware is laid out as a modular system. The color LCD touchscreen serves as the operator interface, while a PID controller handles the heating profile and a separate atmospheric pressure module corrects for local conditions. The main chassis accepts multiple furnace units, each connecting independently so you are not locked into a fixed test capacity.
The touchscreen displays the temperature rise curve in real time and lets you adjust parameters or start the sequence. Tests can be triggered individually by time or synchronized across several furnaces running the same method. The PID loop maintains the heating rate through the ramp and detects flameout events automatically. Pressure compensation runs continuously in the background, so readings taken on a stormy afternoon and a clear morning line up after correction.
Ignition mode is selectable-electronic or gas flame-depending on the standard in play. Data ports include RS-232 and RS-485 for external logging, internal storage holds about a hundred records, and a thermal printer generates hard copies. Fault detection triggers alarms for out-of-range conditions before they escalate. The platform itself is configurable to different standards without swapping the entire instrument, which matters for labs that need to switch between GB, ASTM, or other methods depending on the customer or contract.
What kind of pre-sales services do you offer?
Free sample testing: Ship us your customer's oil sample; we run the test on camera and share results + video within 5 working days.
Technical consultation: Our application engineers assist your sales team with end-user site surveys (remote or on-site in select regions).
Marketing materials: High-resolution product photos (white background, 300 dpi), dimensioned CAD drawings (DWG/PDF), and a customizable product data sheet (AI/InDesign format).
Competitive comparison matrix: We prepare a feature-by-feature benchmark against major competitors (Anton Paar, Tanaka, Normalab) so your sales team can articulate value.
How should the on-site installation and commissioning of the Open Flash Point analyzer be carried out?
Site Requirements
Bench: Stable, level, non-combustible surface. Recommended: ceramic-top lab bench.
Clearance: Minimum 300 mm on all sides for ventilation; no flammable materials within 1 meter.
Environment: 10–35 °C ambient, < 85 % RH (non-condensing). Avoid drafts - air velocity at cup rim should be < 0.2 m/s per ASTM D92 Section 7.1.
Power: Dedicated outlet with earth ground (resistance < 4 Ω). We supply a power cord matched to destination-country plug type (Type A/B/C/G/I).
Unboxing & Setup (Typical Time: 15 minutes)
Remove instrument from crate; inspect for shipping damage. Photograph any issues immediately.
Install the test cup onto the heating mantle. Align locating pins.
Mount the thermocouple probe into the cup bracket; hand-tighten the compression fitting.
Connect the igniter arm; verify free swivel motion.
Plug in power cord → switch on → the instrument runs a self-diagnostic (checks sensor continuity, igniter spark, display calibration).
Run a blank test (empty cup, heat to 100 °C) to verify thermocouple reading against an independent reference thermometer. Acceptable deviation: ≤ 1 °C.
FAQ
Q1: What is the difference between open flash point and closed flash point testing?
A: Open flash point testing (Cleveland Open Cup, ASTM D92) exposes the sample surface to the atmosphere, allowing vapors to dissipate naturally. It is used for higher-flash-point materials such as lubricating oils, transformer oils, and heavy petroleum fractions - typically those with flash points above 79 °C. Closed flash point testing (Pensky-Martens, ASTM D93; or Abel, ASTM D3278) confines vapors above the liquid, resulting in lower reported flash points. The choice depends on the applicable product specification and safety classification standard. For transformer insulating oil, ASTM D92 (open cup) is the universally required method per IEC 60422 and IEEE C57.106.
Q2: How long does a single open flash point test take?
A: A typical test cycle - from sample loading through result display - takes 20 to 35 minutes, depending on the expected flash point of the sample. Higher flash points require longer heating time. The instrument's programmable heating ramp (up to 17 °C/min in the initial rapid-heating phase, then 5 °C/min near the anticipated flash point) optimizes throughput without sacrificing accuracy. Under ASTM D92, the prescribed slow heating rate is 5–6 °C/min for the last 28 °C before flash, and our tester manages this transition automatically.
Q3: How do I verify the accuracy of the tester after purchase?
A: We recommend a two-point verification using certified flash point reference standards (available from organizations such as Paragon Scientific or Cannon Instrument Company). Select one reference fluid with a certified flash point near 150 °C and another near 280 °C. Run each sample per ASTM D92 procedure. Your measured result should fall within the certified value ± repeatability limit stated in the reference fluid certificate (typically ± 4–8 °C). If deviation exceeds this, perform a thermocouple calibration per the user manual, or contact our technical support for remote-guided recalibration.
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