Sentry Hipot Tester AC/DC/IR – 19070
- AC/DC/IR 3 in 1 hipot tester
- AC 5kV and DC 6kV output
- 1kV insulation resistance test
- Insulation resistance measurement from 1M to 50
- Ground continuity check
- Open Short Check(OSC) function
- GFI shutdown the instrument when imbalance current > 0.5mA
- Flashover (ARC) detection
- Quick discharge of DUT in IR and DC test
- Pause mode
- Large LCD display (240 x 64 dots matrix)
- UL and TUV approved (*see spec)
- CE mark
- Programmable ramp/fall and test time
- Programmable high/low limit
- Save/Recall program test function
- Remote control and interface support
- 2-Year factory warranty
Chroma’s Sentry 19070 series testers are the smallest Hipot Testers currently available in the world. Its super mini size is easy to carry and the large LCD display makes viewing measurement results easy. These sophisticated Hipot Testers are most applicable to safety testing electronic components.
The Sentry 19070 Hipot Tester series provides 2 models to choose from. The Sentry 19071 for AC Hipot testing; and the Sentry 19073, which combines both AC and DC Hipot with insulation resistance (IR) measurements into a single compact unit.
Open Short Check (OSC)
The O.S.C function is used to check whether the connection is an open connection or that a short circuit exists between an instrument and DUT (equipment under test) before the Electrical Safety Test. If there is a bad connection between the instrument and DUT, for instance a bad lead or relay oxidation, the test will also PASS. In some cases, the DUT has a short before testing. In this case, testing can lead to a broken test instrument due to the high load current. Therefore, our test devices check for open and short circuit conditions to ensure effective testing and protect instruments.
Generally, DUT have capacitive load (Cx) from tens to thousands of pF. If there is an open connection, a capacitance will appear and total capacitive load will be lower than normal conditions. If the DUT is shorting, total capacitive load is higher than that in normal conditions. Therefore, we can measure the value of capactive load to check whether the contact is good or not.
Ground Fault Interrupt (GFI)
Test environments often require that test equipment be equipped with an auto interrupt device. For this reason, Chroma provides a Ground Fault Interrupt (GFI) function. When the current meter A1 and A2 detect a difference (i2-i1=iH) between the value i1 and the actual i2 test current over high, the device can cut power transiently to protect human body safety. It is not only compliant with safety standards but also provides additional safeguards for test personnel.
In DC hipot and IR test the device under test is discharged back through the HV transformer. This technique results in a rapid and safe discharge.
Flashover (ARC) Detection
Fast transients in Voltage or Current occuring while Hi-Pot testing is called Electrical Flashover. Normally, in AC line frequency (50Hz/60Hz) or DC Hi-Pot testing, the leakage current is the same as 50Hz/60Hz or DC (charge current is excepted). As shown in Figure 1, leakage current varies smoothly.
On the other hand, electrical discharge occurring because of poor insulation material, electrode gap or surface clearance etc., fast transients in leakage current appear as shown in Figure 2. This is a phenomenon of poor withstanding. Most Electrical Safety regulations mention the necessity of a Withstand Strength Test. Nevertheless, general Hi-Pot testers only detect the RMS value of leakage current without the capability to detect Flashover. Therefore, the FLASHOVER detection function included with our Hi-Pot tester is necessary.
|Sentry 19071||Hipot Tester (AC)|
|Sentry 19073||Hipot Tester (AC/DC/IR)|
|A190701||Remote Control Box|
|A190702||40kV Test Probe|
|A190706||19′ Rack Mount Kit for Model 19070 series|
|A190708||ARC Verification Fixture|
|S15||Interconnect Cable Set [19070 to 19572]|
|G13||Corded Product Adapter Hipot (115V)|
[contact-form-7 id=”4877″ title=”Hipot 19070″]
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