The Atlas ZEN is ideal for testing Zener diodes (including avalanche diodes), transient suppressors, LEDs and LED strings.
generates constant current pulses (selectable from 2mA, 5mA, 10mA and
15mA) at voltages from 0V to 50V. So even high voltage Zeners or high
voltage LED strings can be tested.
Test currents are supplied in narrow pulses to ensure that the component under test remains at a constant temperature.
voltage of the part is displayed on the screen together with the test
current and also a measure of the component's slope resistance (also
known as dynamic impedance).
- ZEN50 Instrument.
- Fitted flexible test leads with gold plated crocs.
- Comprehensive illustrated user guide.
- AAA Alkaline battery.
0.00V to 50.00V
2mA, 5mA, 10mA and 15mA
Slope resistance range:
0 Ohms to 8000 Ohms
Zener voltage accuracy:
Test current duty cycle:
Display sample rate:
Operating temperature range:
10°C to 40°C (50°F to 104°F)
Alkaline AAA (suppliled)
Can the ZEN50 be used in-circuit?
Not really. Nothing nasty should happen to your Atlas ZEN as it can
cope with abuse voltages of ±50V. But your circuit may be exposed to
voltages that it is not designed for. Additionally, other circuit
effects can influence the ZEN's readings.
Can I test the VF of diodes and LEDs?
Yes. You can even test LED strings with a string voltage of up to 50V.
Take great care not to connect your LED(s) in reverse though, the test
voltages generated by the Atlas ZEN will exceed the maximum reverse
voltage for most LEDs.
What about precision voltage references, will it test those?
The Atlas ZEN will apply its test currents in short pulses to your
component, it then measures the resulting voltage across it. The test
current pulses are kept deliberately short (to prevent temperature rise)
so some voltage reference ICs may not respond fast enough. We have
tested many however with no problem.
How is the slope resistance measured?
The Atlas ZEN automatically tests your device over a span of test
currents and internally generates a fitted curve. The curve is
mathematically differentiated to calculate the slope at your selected
test current. This is more accurate than simply averaging the slope
between a pair of test currents.
How much voltage is generated by the ZEN?
The Atlas ZEN generates voltages of up to 60V in order to be able to
test components that require up to around 50V to operate. Both the
voltage and current are electronically limited. The voltages are below
levels described in the Low Voltage Directive 2006/95/EC.
User Guide (EN)
User Guide (DE)
User Guide (IT)
Data Sheet (EN)
certificate of calibration includes results of manual verification
tests. Instrument is calibrated the same way regardless of whether you
require the certificate.