1. test Zener diodes, Avalanche diodes, VDRs, TVSs, LED strings and much more (up to 50 V)
2. measures breakdown voltage (0.00 V to 50.00 V) with a resolution as fine as 20 mV
3. measures slope resistance (up to 1 kO at 15 mA with a 1O resolution)
4. supports most Zeners, Avalanche diodes and reference diodes from 0 V up to 50 V
5. great for testing VDRs, TVSs and other types of voltage protection devices
6. selectable test currents: 2 mA, 5 mA, 10 mA, 15 mA
7. tiny duty cycle of test current to minimise heating of your component, even when testing at 50 V and 15 mA
8. single alkaline AAA battery (incl.)
9. long battery life and regulated test conditions even when the battery voltage is as low as 1.0 V
10. continuous measurement display (updated 3 times per second)
11. hold-function to hold displayed values even if component is removed
12. fitted gold plated crocodile (alligator) clips
13. comprehensive printed user guide available (English - German - Italian)

1. specification summary at 20-25 °C (68-77 °F) unless otherwise specified
2. Zener voltage range (Vz): 0.0 V - 50.0 V
3. nominal test currents (Iz) : 2mA, 5mA, 10mA, 15mA
4. set test current accuracy: ± 1 % ± 0.2 mA
5. Zener voltage measurement accuracy: ± 1% ± 40 mV
6. Zener voltage measurement resolution : 20 mV - 40 mV
7. test frequency accuracy: -1.5% ~ +1.5%
   1. 60 V pulsed DC satisfies lower limit of 75 V(DC) for Low Voltage Directive 2006/95/EC
8. test current into a short circuit (pulsed) : 35 mA
9. test current duty cycle :
   1. min: 0.1%
   2. max: 5%
   3. typical: 1%
   4. duty cycle of test current designed to keep power dissipation of Zener under test to very low levels
10. external abuse voltage : ± 50 V
11. slope resistance measurement range:
    1. Iz = 2 mA: 0-8000 Ohm
    2. Iz = 5 mA: 0-3200 Ohm
    3. Iz = 10 mA: 0-1600 Ohm
    4. Iz = 15 mA: 0-1000 Ohm
12. displayed slope resistance resolution:
    1. Iz = 2 mA: 5 Ohm
    2. Iz = 5 mA: 2 Ohm
    3. Iz = 10 mA: 1 Ohm
    4. Iz = 15 mA: 1 Ohm
13. slope resistance measurement accuracy:
    1. Iz = 2 mA: ±1% ±10 Ohm
    2. Iz = 5 mA: ±1% ±4 Ohm
    3. Iz = 10 mA: ±1% ±2 Ohm
    4. Iz = 15 mA: ±1% ±2 Ohm
14. slope resistance current span: (Iz-50%) to (Iz+50%)
15. slope resistance measurement method :
    1. differentiation of curve that fits:: (Iz-50%, Vz1), (Iz, Vz2), (Iz+50%, Vz3)
    2. measurement rate: 3 Hz
    3. auto-off period: 60 sec.
16. battery:
    1. type: 1 x AAA alkaline
    2. voltage range: 0.9 V - 1.6 V
    3. low battery warning: 1.0 V ± 0.05 V
17. operating temperature: 10-40°C
18. dimensions (excl. leads): 103 x 70 x 20 mm
19. weight: 98 g
20. fundamental materials: plastic, glass and metal

zen50_userguide_en.pdf