HZSF-7020 SF6 Dew Point Trace Moisture Test Instrument
1. Tech features
Portable design: the instrument is lighter, easy to carry and use.
Self-calibration: The sensor probe can automatically calibrate the zero point, automatically eliminate the system error caused by zero point and drift, ensure the accuracy of each measurement, and avoid the tedious annual calibration.
Fast measurement: no preheating is required after starting up, and the dew point saturation state can be reached quickly.
Fast and gas-saving: the gas consumption is only about 2L (101.2kPa) during measurement.
Self-locking joints: self-locking joints imported from Germany, safe and reliable, no air leakage.
Data storage: It adopts large-capacity design and can store up to 50 sets of test data.
Clear display: LCD screen directly displays dew point, micro water (ppm), ambient temperature, ambient humidity, time and date, battery power and other content.
RS232 interface: It can be connected with a serial printer for data printing.
Built-in power supply: Built-in 4Ah rechargeable lithium battery, it can work continuously for 5 hours once fully charged.
2. Tech Data
|
Dew point | Measuring range | －60 ℃～+20 ℃ |
| measurement accuracy | ±2℃ | |
| Response time （＋20℃） | 63% in 45 seconds, 90% in 90 seconds | |
| ambient temperature | －40℃～＋60℃ | |
| ambient humidity | 0～100％ RH | |
|
power supply | AC 220V | |
| built-in rechargeable battery | ||
| battery performance | Over 10 hours of charging time, 5 hours of use | |
Measurement Method
Connect SF6 equipment
Connect the threaded end of the measuring pipe to the switch joint, tighten it with a wrench, and close the needle valve at the other end of the measuring pipe;
Then insert one end of the quick connector on the test pipe into the sampling port on the micro-water meter; connect the exhaust pipe to the air outlet.
Finally, connect the switch connector with the SF6 electrical equipment measurement interface and tighten it with a wrench;
Initialization
Turn on the power switch of the instrument, and the instrument enters the initial self-calibration process, which takes about 10 seconds.
Check the power
This instrument recommends to use alternating current first.
When using DC power, please check the battery power displayed on the upper right corner, if the power is less than a quarter, please turn off the power and continue to use it after charging.
Start measuring
First open all the flow valves on the panel, and then use the instrument to measure the needle valve on the pipeline to adjust the flow, adjust the flow to 0.5L/M~0.75L/M, and start measuring the SF6 humidity.
Store data
After the equipment measurement is completed, the data can be saved in the instrument, press the "OK" key to call out the operation menu, the specific operation method is shown in the next section.
Measure other equipment
After a piece of equipment is measured, close the needle valve on the measurement pipeline and the regulating valve on the micro-water meter. Remove the adapter from the SF6 electrical equipment. If you need to continue to measure other devices, please do not turn off the power of the instrument, and continue to measure the next device according to the above steps.
End of measurement
After the measurement of all equipment is completed, turn off the power of the micro water meter.
Precautions
The instrument should be placed in a safe place to prevent it from being broken. Avoid violent vibrations.
Do not measure corrosive gases.
The instrument should be charged in time before use. When charging, you only need to connect the power cord to the 220V socket, without turning on the power switch, the instrument will automatically charge, and the charging time generally takes more than 10 hours.
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Test content | Standard （μ l/l, 20℃） |
| The moisture content of the breaking unit and the pillar unit should be measured separately when the sulfur hexafluoride circuit breaker is out of the factory and during overhaul (before the overall installation). |
≤150 |
| When handing over, measure the moisture value of the circuit breaker from the air charging interface at the lower part of the pillar. |
≤150 |
| During operation, the moisture value of the circuit breaker is measured by the gas charging interface at the lower part of the pillar. The test period shall be stipulated in the "pre-test procedure". |
≤200 |
| During operation, when necessary (air leakage of the breaking unit, disassembly of the breaking unit), the water content of the breaking air chamber of the sulfur hexafluoride circuit breaker should be measured separately from the self-sealing joint in the header. |
≤300 |
Our Services:
From the date of purchase within one year instrument, is a product quality problem free repair replacement, lifetime supply of maintenance and technical services. The instrument has found anomalies or malfunctions please contact us to arrange the most convenient treatment options.
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