HIOKI BYPASS DIODE TESTER FT4310
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The Hioki FT4310 bypass diode tester enables inspection of solar panel bypass diodes for opens and shorts during both day and night without covering panels, improving work efficiency and safety. It features wireless data transfer to smartphones, simultaneous parameter measurement, and provides audible and visual alerts for possible faults. The device can identify component degradation and is designed to withstand tough conditions, offering functionalities such as a comparator function for easy anomaly detection.
![HEADQUARTERS
81 Koizumi, Ueda, Nagano, 386-1192, Japan
TEL +81-268-28-0562 FAX +81-268-28-0568
http://www.hioki.com / E-mail: os-com@hioki.co.jp
HIOKI USA CORPORATION
TEL +1-609-409-9109 FAX +1-609-409-9108
http://www.hiokiusa.com / E-mail: hioki@hiokiusa.com
All information correct as of June 30, 2017. All specifications are subject to change without notice. FT4310E2-76E Printed in Japan
DISTRIBUTED BY
HIOKI (Shanghai) SALES & TRADING CO., LTD.
TEL +86-21-63910090 FAX +86-21-63910360
http://www.hioki.cn / E-mail: info@hioki.com.cn
HIOKI SINGAPORE PTE. LTD.
TEL +65-6634-7677 FAX +65-6634-7477
E-mail: info-sg@hioki.com.sg
HIOKI KOREA CO., LTD.
TEL +82-2-2183-8847 FAX +82-2-2183-3360
E-mail: info-kr@hioki.co.jp
Note: Company names and Product names appearing in this catalog are trademarks or registered trademarks of various companies.
Order code/ Options
TEST LEAD WITH REMOTE
SWITCH (RED)
L9788-10
TIP PIN
L9788-90
Sleeve
35mm
φ3.2mm
For checking breaker terminal, Detachable
for tip of the L9788-10
BREAKER
PIN
L9788-92
65mm/ φ2.6mm
8.0mm/
φ4.0mm
TEST LEAD SET WITH
REMOTE SWITCH
L9788-11
Accessories
Accessories Connection app
Model: BYPASS DIODE TESTER FT4310
Model No.
(Order Code) (Note)
FT4310 Built-in Bluetooth®
wireless technology
GENNECT Cross
(Freeware)
[Accessories]
TEST LEAD SET WITH RE-
MOTE SWITCH L9788-11×1
CARRYING CASE C0206×1
Instruction manual×1
LR6 alkaline battery×6
Caution: The FT4310 cannot measure strings installed in parallel. Please contact Hioki for more information.
Specifications
Measurement items Open-circuit voltage, Short-circuit current, Bypass route resistor
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®
wireless technology
Operating temperature
and humidity
-10 to 65°C, 80% RH or less *(no condensation)
*Less than 40°C
Storage tempera-
ture and humidity
-20 to 65°C, 80% RH or less (no condensation)
Maximum input voltage 1000 V DC
Dustproof and waterproof IP40 (EN60529)
Standards Safety: EN61010, EMC: EN61326
Drop proof On concrete: 1 m
Power supply LR6 (AA) alkaline battery×6, Maximum rated power 18 VA
Continuous oper-
ating time
Approx. 45 hours (Comparator, backlight, Bluetooth®
OFF)
Approx. 18 hours (Comparator, backlight, Bluetooth®
ON)
Dimensions 152W×92H×69D mm (5.98 W × 3.62 H × 2.72 D in)
Mass 650 g (22.9 oz) (including batteries, excluding test leads)
Displays the num-
ber of bypass diode
measurements
Automatic polarity
judgment function
Live circuit indicator
Comparator
: Indicates the number of bypass diode measurements that
have been made from the time the instrument was turned
on until it is turned off (COUNT mode).
: Warns the user with an audio tone and red backlight that
the measured voltage has exceeded the threshold.
: Warns the user that no voltage exists across the
measurement terminals.
: Compares measured values to a set reference value to
generate a PASS or FAIL judgment.
Resistance (set in BPD TEST mode)
Voltage (set in Voc mode)
Description of functionality
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
Duration of shorting
between terminals
10 ms or less
Output pulse
Voltage: 100 V DC or less, Pulse width: 5 ms or less
Limiting current: Measured short-circuit current + 1 A or less
Maximum: 13 A
Measurement time 2 s or less (3 s or less when measurement voltage is 10 V or less)
Possible number
of measurements
3000 times (Comparator, backlight, Bluetooth®
OFF)
LR6 Alkaline battery × 6
■ Measurement Specifications
BPD TEST mode
Measurement items Open-circuit voltage
Measurement range 0 V to 1000 V DC (Displayed up to 1200 V DC)
Response time Within 1 sec.
Voc mode
■ General Specifications
Range
(displayed range)
Accuracy range Accuracy
Input
impedance
Open-circuit
voltage
1000 V
(0 to ±1200 V)
0 to ±1000 V
±0.2% rdg.
±3 dgt.
1 MΩ or
higher
Short-circuit
current
15.0 A
(0.0 to 15.0 A)
0.0 to 15.0 A
±3% rdg.
±3 dgt.
0.5 Ω or
lower
Bypass route
resistance
15Ω
(0.0 to 15.0 Ω)
0.0 to 15.0 Ω
*±5% rdg.
±5 dgt.
-
■ Accuracy specifications
*During pure resistance measurement
CARRYING
CASE C0206
■ Software specifications
Android iPhone
GENNECT Cross (Freeware)
Interface Bluetooth®
4.0LE
Communication distance 5 m (line of sight)
Supported AndroidTM
devices
AndroidTM
4.3 or later
(Bluetooth®
low energy enabled devices)
Supported iOS devices
iOS 10 or later
(Bluetooth®
low energy enabled devices)
*The Bluetooth®
word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such
marks by HIOKI E.E. CORPORATION is under license.
*Android, Google Play and the Google Play logo are trademarks of Google Inc.
*iOS is a registered trademark of Cisco Technology, Inc. and/or its affiliates in the United States and certain other countries.
*iPhone, iPad, iPad mini, iPad Pro and iPod touch are trademarks of Apple Inc.
*Apple and the Apple logo are trademarks of Apple Inc. App Store is a service mark of Apple Inc.
*Microsoft, Windows, Windows Vista, and Excel are either registered trademarks
or trademarks of Microsoft Corporation in the United States and/or other countries.
*Other trademarks and trade names are those of their respective owners.
*The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by HIOKI E.E. CORPORATION is under license.
Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year, Product warranty period for 3 years
Search for “GENNECT Cross” in Google Play or on the App Store.](https://image.slidesharecdn.com/33799-ft4310e2-76e-210928033538/85/HIOKI-BYPASS-DIODE-TESTER-FT4310-4-320.jpg)
HIOKI BYPASS DIODE TESTER FT4310
- 1. BYPASS DIODE TESTER FT4310 Did you know? A failed bypass diode can cause a fire. Inspect solar panel bypass diodes for opens and shorts in broad daylight without covering panels World’s first Efficiently test strings without covering panels Quickly identify faulty bypass diodes during operation and maintenance Simultaneously mea- sure all parameters Automatically transfer data wirelessly Please see www.hioki.com for list of supported regions.
- 2. 2 World's first! Conduct open fault testing easily during any time of day Save time - simultaneously measure all electrical parameters Red backlight and audible warning alert the user to possible faults • 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, you can detect for open faults even when the sun is out without covering the panels. Testing can also be performed at night. *Testing for short-circuit faults can only be performed during the day. • Easily test using the strings in the junction boxes, eliminating the need to climb onto the roof and dramatically improving work efficiency. *Disconnect the string being measured from the interconnect prior to measurement. Easily inspect bypass diodes for open and short-circuit faults even in broad daylight • Simply set the rotary knob to “BPD TEST” and press the “Measure” button to measure and display all parameters necessary for fault identification (open-circuit voltage, short-circuit current, and bypass route resistance). Normal reading Place test leads in contact with terminals Press the button Open fault Using BPD TEST mode Short-circuit fault Using Voc mode V V V Voc DIFF REF COMP CONT APS FAIL V A A Voc COMP RBPR APS FAIL The diode is determined to have failed since the values differ by -10 V. The measurement current and short-circuit current are approximately equal. V A A Voc COMP RBPR APS PASS Isc + α1: Measuring current value Isc: Short-circuit current value Voc: Open-circuit voltage value RBPR: Bypass route resistance value The instrument indicates the open state (“opn”). Voc: Measured value REF:Reference value (ini- tial measured value) DIFF:Difference between mea- sured value and reference value If the bypass diode is functioning normally, the measured current value should be close to 1 A larger than the short-circuit current value. *Visit the Hioki website for a more detailed explanation of the underlying principles. Principle When a bypass diode experiences a short-circuit fault, the output voltage decreases (by about 10 V) because the corresponding solar panels are not contributing to the array’s generated power. By detecting this difference, it is possible to detect bypass diode short-circuit faults and cell string losses. Principle Measurement takes 2 sec. or less per string Bypass diodes protect solar cells from overheating when partial shading occurs. However, they only jump into action when a panel is shaded, so defective diodes can go undiscovered until it is too late. When a defective bypass diode is unable to prevent a shaded cell from receiving more and more negative voltage, the cells can overheat and cause eventual damage.
- 3. 3 Improve work efficiency by continuing to measure and record without interruptions Automatically transfer data with Bluetooth® wireless technology Available for Android and iOS devices Measured values held on the display are sent immediately to a smartphone or tablet via Bluetooth® wireless technology. Eliminate the need to take notes - particularly useful at sites with a large number of test points. (Use with the dedicated Hioki GENNECT Cross app.) Save date in CSV or PDF format Since the FT4310 can measure the resistance of the bypass route, including the wiring resistance of solar panel strings, you can detect degradation of bypass diodes (which manifests itself in the form of increased resistance) and increased contact resistance in the connections between modules (defective connections). The instrument’s comparator function can be used to compare measured values to a previously set value to generate PASS and FAIL judgments, making it easier to discover anomalies. Discover anomalies before they develop into failures Detect component degradation using the FT4310’s comparator function Ease of use and functionality in a powerful instrument that fits in the palm of your hand Short-circuit fault: Generating capacity falls Bypass diodes Bypass diodes Bypass diodes Bypass diodes Cloud or partial shadow Cloud or partial shadow When a short-circuit fault occurs, the gen- erated current flows in a loop, making it impossible to capture the generated power, resulting in lowered efficiency. Normal reading: Current is routed around panels that are covered by shadows Bypass diodes Bypass diodes Bypass diodes Cloud or partial shadow Cloud or partial shadow When a solar panel is obscured by a partial shadow (or when it fails), the current bypasses the panel in order prevent any drop-off in gen- erating efficiency. Open fault: Potential fire Bypass diodes Bypass diodes Bypass diodes Bypass diodes Cloud or partial shadow Cloud or partial shadow When an open fault occurs, current is forced to flow to the defective cell when it’s covered by a shadow, causing the panel to heat up and posing the risk of fire. Reference Issues caused by faulty bypass diodes Short-circuit fault Testers are built tough to withstand a 1-meter drop onto a concrete floor. DROP PROOF Six AA batteries provide enough power for 3000 measurements. Energy-saving design A button right at your fin- gertip on the test leads lets you hold measured values easily, eliminating the need to operate a control on the instrument itself. They also incorpo- rate a handy light. Integrated "hold" button right on test leads Leave both hands free so you can precisely posi- tion test probes without worrying about dropping the instrument. Bundled case with neck strap Simultaneously mea- sure all parameters BPD TEST mode Batch measurement of open-circuit voltage, short-circuit current, and bypass route resistance Easily discover open faults Specialized for open-cir- cuit voltage measurement Voc mode Measure open-circuit volt- age in 1 sec. or less Easily discover short-circuit faults since the FT4310 can display the difference between the measured value and the reference value Enhanced safety SELF CHECK mode Detect anomalies in the instrument’s internal circuitry before measurement Bright backlight lets you work in dark or poorly lit locations. Backlight (White LED) Open fault
- 4. HEADQUARTERS 81 Koizumi, Ueda, Nagano, 386-1192, Japan TEL +81-268-28-0562 FAX +81-268-28-0568 http://www.hioki.com / E-mail: os-com@hioki.co.jp HIOKI USA CORPORATION TEL +1-609-409-9109 FAX +1-609-409-9108 http://www.hiokiusa.com / E-mail: hioki@hiokiusa.com All information correct as of June 30, 2017. All specifications are subject to change without notice. FT4310E2-76E Printed in Japan DISTRIBUTED BY HIOKI (Shanghai) SALES & TRADING CO., LTD. TEL +86-21-63910090 FAX +86-21-63910360 http://www.hioki.cn / E-mail: info@hioki.com.cn HIOKI SINGAPORE PTE. LTD. TEL +65-6634-7677 FAX +65-6634-7477 E-mail: info-sg@hioki.com.sg HIOKI KOREA CO., LTD. TEL +82-2-2183-8847 FAX +82-2-2183-3360 E-mail: info-kr@hioki.co.jp Note: Company names and Product names appearing in this catalog are trademarks or registered trademarks of various companies. Order code/ Options TEST LEAD WITH REMOTE SWITCH (RED) L9788-10 TIP PIN L9788-90 Sleeve 35mm φ3.2mm For checking breaker terminal, Detachable for tip of the L9788-10 BREAKER PIN L9788-92 65mm/ φ2.6mm 8.0mm/ φ4.0mm TEST LEAD SET WITH REMOTE SWITCH L9788-11 Accessories Accessories Connection app Model: BYPASS DIODE TESTER FT4310 Model No. (Order Code) (Note) FT4310 Built-in Bluetooth® wireless technology GENNECT Cross (Freeware) [Accessories] TEST LEAD SET WITH RE- MOTE SWITCH L9788-11×1 CARRYING CASE C0206×1 Instruction manual×1 LR6 alkaline battery×6 Caution: The FT4310 cannot measure strings installed in parallel. Please contact Hioki for more information. Specifications Measurement items Open-circuit voltage, Short-circuit current, Bypass route resistor 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® wireless technology Operating temperature and humidity -10 to 65°C, 80% RH or less *(no condensation) *Less than 40°C Storage tempera- ture and humidity -20 to 65°C, 80% RH or less (no condensation) Maximum input voltage 1000 V DC Dustproof and waterproof IP40 (EN60529) Standards Safety: EN61010, EMC: EN61326 Drop proof On concrete: 1 m Power supply LR6 (AA) alkaline battery×6, Maximum rated power 18 VA Continuous oper- ating time Approx. 45 hours (Comparator, backlight, Bluetooth® OFF) Approx. 18 hours (Comparator, backlight, Bluetooth® ON) Dimensions 152W×92H×69D mm (5.98 W × 3.62 H × 2.72 D in) Mass 650 g (22.9 oz) (including batteries, excluding test leads) Displays the num- ber of bypass diode measurements Automatic polarity judgment function Live circuit indicator Comparator : Indicates the number of bypass diode measurements that have been made from the time the instrument was turned on until it is turned off (COUNT mode). : Warns the user with an audio tone and red backlight that the measured voltage has exceeded the threshold. : Warns the user that no voltage exists across the measurement terminals. : Compares measured values to a set reference value to generate a PASS or FAIL judgment. Resistance (set in BPD TEST mode) Voltage (set in Voc mode) Description of functionality 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 Duration of shorting between terminals 10 ms or less Output pulse Voltage: 100 V DC or less, Pulse width: 5 ms or less Limiting current: Measured short-circuit current + 1 A or less Maximum: 13 A Measurement time 2 s or less (3 s or less when measurement voltage is 10 V or less) Possible number of measurements 3000 times (Comparator, backlight, Bluetooth® OFF) LR6 Alkaline battery × 6 ■ Measurement Specifications BPD TEST mode Measurement items Open-circuit voltage Measurement range 0 V to 1000 V DC (Displayed up to 1200 V DC) Response time Within 1 sec. Voc mode ■ General Specifications Range (displayed range) Accuracy range Accuracy Input impedance Open-circuit voltage 1000 V (0 to ±1200 V) 0 to ±1000 V ±0.2% rdg. ±3 dgt. 1 MΩ or higher Short-circuit current 15.0 A (0.0 to 15.0 A) 0.0 to 15.0 A ±3% rdg. ±3 dgt. 0.5 Ω or lower Bypass route resistance 15Ω (0.0 to 15.0 Ω) 0.0 to 15.0 Ω *±5% rdg. ±5 dgt. - ■ Accuracy specifications *During pure resistance measurement CARRYING CASE C0206 ■ Software specifications Android iPhone GENNECT Cross (Freeware) Interface Bluetooth® 4.0LE Communication distance 5 m (line of sight) Supported AndroidTM devices AndroidTM 4.3 or later (Bluetooth® low energy enabled devices) Supported iOS devices iOS 10 or later (Bluetooth® low energy enabled devices) *The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by HIOKI E.E. CORPORATION is under license. *Android, Google Play and the Google Play logo are trademarks of Google Inc. *iOS is a registered trademark of Cisco Technology, Inc. and/or its affiliates in the United States and certain other countries. *iPhone, iPad, iPad mini, iPad Pro and iPod touch are trademarks of Apple Inc. *Apple and the Apple logo are trademarks of Apple Inc. App Store is a service mark of Apple Inc. *Microsoft, Windows, Windows Vista, and Excel are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries. *Other trademarks and trade names are those of their respective owners. *The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by HIOKI E.E. CORPORATION is under license. Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year, Product warranty period for 3 years Search for “GENNECT Cross” in Google Play or on the App Store.