CBA-2SFH
CBA-2SFH SF6 Gas Comprehensive Tester
Purity · dew point · decomposition products · one gas sample
Testing SF6 quality has traditionally meant three instruments and three gas draws, each one venting insulating gas that has to be replaced. This takes purity, moisture and decomposition products from a single sample, cutting both the time on site and the gas lost to testing.
CBA-2SFH · 250 × 230 × 300 mm, 6.8 kg
One sample, three answers
Testing SF6 quality has traditionally meant three instruments and three gas draws, each one venting insulating gas that has to be replaced. Every draw costs gas. Taking all three measurements from the same sample is what makes routine testing affordable.
Purity by thermal conductivity
0 to 100% at ±0.5% in under two minutes, temperature compensated so the reading holds across the working range rather than drifting with the day.
Dew point to −80 °C
A high-precision sensor reads dew point and micro water in ppm, settled about three minutes after power-on.
Decomposition products
SO₂ and H₂S to 200 ppm and CO to 1000 ppm on electrochemical cells, with HF to 10 ppm as a factory option.
Sealed self-locking couplings
The connectors close as they part, so no gas escapes at the joint when connecting or disconnecting.
Twelve hours on a charge
A built-in lithium pack runs for more than twelve hours, and the instrument works equally from 100 to 240 V mains.
Self-calibrating zero
The probe zeroes itself before each measurement, so zero-point error and drift are removed rather than accumulating between services.
HF detection and the automatic pipeline cleaning device are both specified with the order rather than fitted later.
Measurement ranges and accuracy
Repeatability is 2% or better on all four decomposition channels, each stable across its full measuring range.
| Measurement | Range | Minimum detection | Accuracy |
|---|---|---|---|
| Purity and moisture | |||
| SF6 purity | 0 to 100% | — | ±0.5% |
| Dew point | −80 to +20 °C | — | ±0.5 °C (−80 to −60 °C) |
| Decomposition products · repeatability 2% or better on all four | |||
| Hydrogen sulphide, H₂S | 0 to 200 ppm | ≤0.1 ppm | ±0.5% |
| Sulphur dioxide, SO₂ | 0 to 200 ppm | ≤0.1 ppm | ±0.5% |
| Carbon monoxide, CO | 0 to 1000 ppm | ≤1 ppm | ±0.5% |
| Hydrogen fluoride, HF (optional) | 0 to 10 ppm | ≤1 ppm | ±0.5% |
| Measurement and response times | |||
| SF6 purity | Under 2 minutes | — | — |
| Dew point, from power-on | About 3 minutes to a settled reading | — | — |
| Response, drying (−60 to +20 °C) | 63% in 5 s | 90% in 45 s | At +20 °C |
| Response, wetting (+20 to −60 °C) | 63% in 10 s | 90% in 240 s | At +20 °C |
Wetting is far slower than drying, which is normal for this sensor type: a sensor that has been reading dry gas takes about four minutes to reach 90% when moved to a wetter sample, so allow for it when moving between compartments. HF is factory-fitted and must be specified with the order.
A printed record without a laptop
Everything you need after the measurement is on the back: a thermal printer for a ticket at the equipment, USB for the full record, the exhaust and the charging inlet.
Thermal printer
Prints the reading at the equipment, so a result is signed off on site rather than transcribed later from a screen.
USB port
Type B socket to a PC. The supplied software pulls all stored records off for analysis and export.
Air outlet
The exhaust from the measuring path, so sampled gas can be routed to recovery rather than vented into the switchroom.
Battery charging
Dedicated charge inlet for the internal lithium pack, ten hours for a full charge.
The air outlet matters as much as the couplings: sampled gas leaves by a known route, so it can go to recovery rather than into the switchroom.
Technical specifications
| Measures | SF6 purity, dew point and micro water in ppm, and the decomposition products SO₂, H₂S and CO, with HF as an option |
|---|---|
| Also shown | Ambient temperature and humidity, time and date, alongside the readings |
| Purity sensor | Thermal conductivity with temperature compensation |
| Moisture sensor | High-precision dew point sensor |
| Decomposition sensors | Electrochemical cells |
| Self-calibration | The probe zeroes itself before each measurement, removing zero-point error and drift |
| Gas connection | Self-locking couplings, sealed while connecting and disconnecting |
| Pipeline cleaning | Optional automatic device purges the internal path after a test |
| Display | 7 inch colour touchscreen, full touch control |
| Storage | 1000 sets of test data held internally |
| Printer | Built-in thermal printer on the rear panel |
| Interface | USB type B to a PC, with the supplied software |
| Power | AC 100 to 240 V, 50/60 Hz, or the internal lithium battery · AC and DC dual use |
| Battery | 10 hours to charge, more than 12 hours of operation · dedicated charge inlet |
| Environment | Ambient −40 to +60 °C · relative humidity 0 to 100% |
| Dimensions · weight | 250 × 230 × 300 mm · 6.8 kg net |
What’s in the case
- CBA-2SFH analyser
- Sample hose with self-locking couplings
- Mains lead and battery charger
- USB lead and PC software
- Printer paper
- Carry case, manual and warranty certificate
HF detection and the pipeline cleaning device are ordered with the instrument, so neither can be added later. Results print at the equipment, and 1000 sets are held for the report.