HIOKI BYPASS DIODE TESTER FT4310

Inspect Solar Panel Bypass Diodes for Opens and Shorts in Broad Daylight Without Covering Panels

Traditionally, bypass diodes can only be inspected for good working condition at night or when power is not being generated by the solar panels in order to verify that any applied current is guided past the solar cells. With the FT4310 Bypass Diode Tester, you can detect for open faults even when the sun is out without covering the panels. Also test for short-circuit faults and cell string losses.

Key Features
• Test for open or short-circuit bypass diodes even during the day*1
• Easily test using the strings in the junction boxes*2
• Save time - simultaneously measure all electrical parameters*3
• Automatically transfer data wirelessly (Available for Android and iOS devices*4)
*1 Testing can also be performed at night. Testing for short-circuit faults can only be performed during the day.
*2 There is no need to climb onto the roof and dramatically improving work efficiency.
*3 Measure open-circuit voltage, short-circuit current, and bypass route resistance and display all three values at once.
*4 Automatically transfer data with Bluetooth® wireless technology

Model No. (Order Code)

FT4310	Built in Bluetooth(R) wireless technology

Note: The FT4310 cannot measure strings installed in parallel. Please contact Hioki for more information.

Basic specifications (Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year)

Measurement items	Open-circuit voltage, Short-circuit current, Bypass route resistor

[BPD TEST mode]

Measurement items	Bypass diode comparator judgment, Bypass route resistor, Open-circuit voltage, Short-circuit current, Measurement (applied) current
Measurement object	Crystal system string Open-circuit voltage: 1000 V DC or less, Rated current: 2 A to 12 A DC
Measurement method	Short-circuit and pulse voltage application
Measurement accuracy	Open-circuit voltage: ±0.2% rdg. ±3 dgt. (at 0 to ±1000 V) Short-circuit current: ±3% rdg. ±3 dgt. (at 0.0 to 15.0 A) Bypass route resistance: ±5% rdg. ±5 dgt. (at 0.0 to 15.0 Ω, During pure resistance measurement)
Measurement time	2 s or less (3 seconds or less when measurement voltage is 10 V or less)
Possible number of measurements	3000 times (Comparator, backlight, Bluetooth® OFF) LR6 Alkaline battery × 6

[Voc mode]

Measurement items	Open-circuit voltage
Measurement range	0 V to 1000 V DC (Displayed up to 1200 V DC), Accuracy: ±0.2% rdg. ±3 dgt.
Response time	Within 1 sec.

[General]

Dustproof and waterproof	IP40 (EN60529)
Functions	Displays the number of bypass diode measurements, Automatic polarity judgment function, Comparison display, Auto hold, Live circuit indicator, Buzzer sounds, Backlight, Comparator, Battery indicator, Auto power off, Bluetooth® Smart
Interface	Bluetooth® 4.0LE, Supports devices: iOS, Android TM smartphone/ tablet
Power supply	LR6 (AA) alkaline battery×6, Maximum rated power 18 VA Continuous operating time: 45 hours (Comparator, backlight, Bluetooth® OFF)
Dimensions and mass	152W×92H×69D mm (5.98 W × 3.62 H × 2.72 D in) 650 g (22.9 oz) (including batteries, excluding test leads)

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