Troubleshooting
For calibration is it required to send back the tester back to the factory or can we run a calibration using our shop standard?
The tester provides a built-in test mode that aims at validating the accuracy of the device by comparing it to a high-accuracy, NIST-traceable polyphase test board or standard. This test is meant to be done in a lab environment and at a rate of one ...
How does the Admittance test work?
Admittance test What is the Admittance test? This test is conducted by injecting a small, 1,525 Hz audio frequency into the CT Secondary, then measuring the audio frequency's induced current to determine the admittance value. Analog filtering and ...
What is the Secondary Burden test?
Secondary Burden test What is the Secondary Burden test? The Secondary Burden test is used to analyze the effect of a resistive burden on the behaviour of the CT. Within the ST-3/XT3 is an array of high accuracy resistors that can be, with the use of ...
What is the Primary Secondary Analysis test?
Primary Secondary Analysis test What is the Primary Secondary Analysis test? This test is to ensure that the ratio between the primary current or voltage and the secondary current or voltage are the same as indicated on the transformers being tested. ...
How about yearly accuracy validation of the tester? Do the accessories need to be calibrated?
The units are calibrated at the factory before delivery to your facilities. We suggest verifying accuracy of the testers using the build in accuracy test in the application at least once a year or as per local PUC or company regulations to ensure ...
How does the Admittance test work?
By injecting a small audio signal of 1525 Hz into the CT secondary, then measuring the induced current of the audio frequency to determine the admittance value. Analog filtering and programmable gain are used to get the best dynamic range for the DSP ...
How does the ST-3/XT3 get the results? How about with a variable load?
The ST3/XT3 can display instantaneous RMS reading for voltage and current. The hardware within can get an averaged RMS over 12 cycles at 60 Hz and we could also run a moving average over a bigger set of RMS readings to reduce the effect of load ...
What happens when the primaries are overhead?
Although we provide various options to properly test primaries, some installations may be hard to reach. The overhead primaries can be tested with the SensorLink® Amp LiteWire and Volt LiteWire along with the interface accessories for the ST-3/XT3. ...
Can it generate graphs from the readings? Which ones?
The results are expressed in table format and graphical format, those will be integrated into the PDF. All the information from the Power quality and burden test have graphics that are displayed in real time to enable an live assessment on the ...
Can I use the ST-3/XT3 on a 5S installation?
Yes. In order to use the ST-3/XT3 on a 5S, 35S or 45S installation, you must use the 5S, 35S and 45S adapter which is included when you purchase a ST-3/XT3. Useful links: ST-3/XT3 Product Page ST-3/XT3 User Guide ST-3/XT3 Connection Guidelines ...
Can the app run from a computer or only from a phone or tablet?
Yes, there is a Windows App version of Probewell Connect that can be used with a computers or a laptop. Using an Iphone phone or tablet, the iOS App can be downladed at the Apple Store. App Store Minimal requirement: iOS 11 and up The Android App can ...
What is the length of the current loop cables from the junction box that they branch out from?
The original length of the accessories it’s 15 feet. But if you require an additional 50' and 100' length, extension cables can be purchased. 50' (ST-3/EXT50) 100' (ST-3/EXT100) Useful links: ST-3/XT3 Product Page ST-3/XT3 User Guide ST-3/XT3 ...
What is the procedure when installing the tester?
The ST-3/XT3 is compatible with CT rated installations forms 3S, 4S, 6S, 8S and 9S, it is also compatible with installation forms 5S, 35S and 45S using the included adapter. Before testing a CT rated installation in the field, always make sure that ...
How many test reports does the unit store internally?
The XT Series tester’s embedded non-volatile memory can hold up to 8 MB of test report data. As a rule of thumb, the memory should hold around 1000 test reports. A test record is created when the operator opts to save the data of a completed test. ...
When the memory is full, does it start overwriting the old tests automatically or does it notify the user when the memory is full before starting to overwrite?
Probewell Connect 2.0: The test are now stored in the mobile device memory used to perform the test with the ST-3/XT3 an can be shared by email at any time as a traceable PDF or CSV report Probewell Connect Version 1.: When there is no more space in ...
How can I export my data?
The Probewell Connect app, offers two data exports formats for XT Series test reports: PDF and CSV. In both cases, test data is extracted from the XT tester’s non-volatile memory and saved on a local drive on a Windows computer. The PDF report format ...
How do I update the XT Series tester firmware?
To benefit from all the latest features and bug fixes, Probewell Lab suggests that firmware updates on XT Series testers be performed periodically. The XT Series 2.0.5 & WT Series 2.1.1 Firmware is always available. Watch Firmware Update Tutorial ...
Can I use it without accessories? How many accessories can I use it with?
Yes, it can work without any accessories, depending on the test you wish to perform on the site. The only test that it is not available without accessories would be the primary/secondary analysis (Ratio Test). The accessories available are 3 phases ...
How does the ST-3/XT3 work?
ST-3/XT3 : Transformer Rated Wireless Site Tester This unit is a socket type tester, that obtains the reading directly from the secondary of the current and potential transformers. It does not require any external load to perform tests and it is ...