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DCA Pro Support Page: DCA Pro - Model DCA75 - Support Have you seen the new LCR45?
The new LCR45 - LCR and Impedance Meter

DCA Pro PC Software and Instrument Firmware
Latest PC Software: V1.1.15.1828,  Latest firmware: 0021 DCA Pro - About Box
Full list of versions is here.
Open your DCA Pro PC Software and select HELP - ABOUT to check your version numbers.
This package includes the latest PC Software and Firmware. You need to ensure Microsoft .NET Framework 4 is already on your computer.
DCA Pro Setup File (8MB)
We suggest you download this installation guide too.
If you're having any difficulties then please contact us and we'll help you get back on track in no time.
If you wish to copy this setup file to your Peak USB Flash Drive then please rename it to "Setup.exe" first.
PC Software supports Windows® XP to Windows® 10
DCA Pro Repair Service
If your DCA Pro is out of warranty or you think you may have blown it up then don't worry.

The best thing to do is to send us your unit so we can assess what needs to be done. We will then contact you (usually on the same day) to discuss the options available. If you wish, we can return your unit, free of charge if you're in the UK. Alternatively, you can book your repair online, send us your unit and we'll get on with it as soon as it gets here.

Full Repair Consists of:
  • Hardware repair
  • Software upgrade (if applicable) to the latest version available for your unit.
  • Full function verification test.
  • 12 months repair warranty.

Send us your DCA Pro (in a padded envelope or box) and book your repair by clicking on the button below. If sending your unit from outside the UK, it is vital that it is clearly marked it with
 "Item for repair - Inward processing relief."
Send to the address shown on our Contact Us page.

DCA Pro Repair
£39.60 inc VAT
(£33.00 + VAT)

UK shipping starts at £4.00+VAT (£4.80) depending on weight. Overseas shipping is charged according to destination and weight and shown before you confirm your acceptance.
Payments are made in UK Pounds and will be converted to your local currency by your payment provider, we have no control over the exchange rate used.
Atlas DCA75 - Frequently Asked Questions (FAQs)
  Can the DCA75 be used in-circuit? No. It is not possible to take into account the influence of other unknown components around the component you're trying to test and results can be misleading. Also, it is possible that you may damage your instrument if there is any unexpected charge in your circuit. We know that it's not always easy, but we recommend that you test components that are not connected to other parts.  
Is the DCA75 ok with germanium transistors, can it measure leakage current and does it take into account the leakage current for it's gain measurement? Yes. The DCA75 will detect the germanium (or silicon) type of semiconductor. It will measure leakage current and it takes that leakage into account when measuring gain (unlike most multimeter hFE measurements).
I've noticed the leakage current of my germanium transistor gradually drop with each subsequent measurement. Is the battery failing or something else wrong? Leakage current is extremely temperature dependent and particularly noticeable for germaniums as the current is fairly high to start with. The leakage current can double for just a 5°C increase in temperature. So after some handling, the transistor temperature slowly falls and can lead to a decreasing leakage current. That's completely normal and correct. Additionally, DCA75 test currents are completely independent of battery condition.
The Collector and Emitter of my germanium transistor is showing the wrong way round, is the DCA75 wrong? If the leakage current of the germanium transistor is quite high (due to warming from your fingers for example), the DCA75 can reject the "correct" pinout. However, it will then search for all other device types and configurations. It can, in those circumstances, find a transistor with the C-E swapped (although gain can be very low). Tests in a simple circuit confirm that you can get a germanium transistor to work, with some gain, in that way. So the DCA75 is not wrong, it's just found a configuration that yields a low leakage current. Try keeping your transistor cool during testing to avoid this situation.
Can the Atlas DCA75 measure Zener diodes? Yes. The DCA75 can test Zener diodes up to around 11V. Zeners with a reverse voltage of less than around 8V will be tested at 5mA, higher voltage ones may be tested at a lower test current. The test current is confirmed on the display.
Can I use the DCA75 to match transistors? Yes. The main parameters that you may be interested in are hFE and VBE. Both of these parameters are measured by the DCA75. This enables you to group your transistors that have similar gain figures for example. Additionally, the use of the curve tracing facility allows even greater flexibility for your desired matching requirements.
Are Unijunction transistors (UJTs) supported? No. The DCA75 doesn't currently support UJTs although this is planned for a future release (to be available via online upgrade too).
My MOSFET has a separate "substrate" or "bulk" connection, what do I do with that lead? Some rare MOSFETs have 4 leads (gate, source, drain and substrate). To enable the DCA75 to test these, connect the substrate lead to the source lead. If your MOSFET does not have a body diode then you will also need to connect a diode across the drain-source leads.
What will the DCA75 show if my component is faulty? Generally, the DCA75 would show "No component found". Sometimes it may still be able to see a pn (diode) junction within the component you're testing, in which case it would display "Diode or diode junction(s)". If there is a short circuit within your component then the DCA75 will display "Short circuit on RED GREEN" for example.
Can my Atlas DCA75 be upgraded online? Yes. The PC software (available here) will check your instrument to make sure it's got the latest firmware, it will then offer to upgrade it for you.
Why can't the DCA75 analyse triacs or thyristors that need higher currents than 10mA? The test currents of the DCA75 are deliberately low to avoid damage to any potentially random component that can be connected any way round. The Peak Atlas SCR is aimed specifically at analysing a wide range of triacs and thyristors that require test currents from less than 100uA up to 100mA.
My voltage regulator won't test out correctly on the DCA75, what's wrong? There are many varieties of voltage regulator available and some can't be tested on the DCA75. Firstly, the regulator voltage needs to be around 8V or lower for it to be testable. Secondly, there are some regulators that just aren't stable unless they're in their intended circuit with decoupling caps and a suitable load.
Will you have software that can run on a Mac or under Linux available? We don't have immediate plans for releasing non-Windows software, although we are investigating the possibility.
I have a suggestion for a new supported component type or new feature, what can you do? We'd love to hear any new component or new feature suggestions. We're a flexible company and we'll do our best to implement new features when possible.
Is the battery used if I'm connected by USB? No. The instrument draws all the power it needs from the USB connection (if present).
How long is the warranty period? All our products now have a warranty of 24 months. This doesn't cover accidental damage or abuse however.
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