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BATTERY RESISTANCE TESTER

UT677A

P/N:

110401111108X

2022/04/13 REV.0

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Summary of Contents for UT677A

Page 1: ...BATTERY RESISTANCE TESTER UT677A P N 110401111108X 2022 04 13 REV 0 ...

Page 2: ... 6 7 3 Principle of temperature measurement 6 VIII Operation Method 7 8 1 Power on off and automatic shutdown 7 8 2 Test interface operation 7 8 3 Setting menu interface operation 7 8 4 Measurement procedure 9 8 5 Data storage 9 8 6 Data access and deletion 9 8 7 Communication with PC 10 8 8 Communicate with smartphone or tablet 10 IX Maintenance and service 10 9 1 Battery 11 9 2 Repair inspection...

Page 3: ...case special attention should be paid to safety when using this instrument II Introduction General rechargeable battery internal resistance tester abbreviated as battery internal resistance tester is a measuring instrument used to measure the internal resistance voltage and temperature of rechargeable batteries such as lead storage batteries and lithium batteries to determine the health of the bat...

Page 4: ... 3 1 Resistance measurement accuracy Range Maximum display Resolution Test accuracy Measuring current 3 mΩ 3 100 mΩ 1 uΩ 1 fs 20 dgt 200 mA 30 mΩ 31 00 mΩ 10 uΩ 0 5 fs 15 dgt 200 mA 300 mΩ 310 0 mΩ 100 uΩ 20 mA 3 Ω 3 100 Ω 1 mΩ 2 mA 3 2 Voltage measurement accuracy Range Maximum display Resolution Test accuracy 7 V 7 100 V 1 mV 0 2 fs 10 dgt 70 V 71 00 V 10 mV 3 3 Temperature measurement accuracy ...

Page 5: ...ent NTC temperature sensor 10KΩ at 26 C A D conversion method successive approximation type Display update frequency 5 times second Response time 200ms Measure time About 2 seconds LCD Size 70 1mm 52 6mm 3 5 inches 320 240 resolution 16 bit true color screen Instrument size 190mm 121mm 51mm USB interface With a USB interface the stored data can be uploaded to the computer saved and printed Bluetoo...

Page 6: ...ng indicator VI Interface display Interface icon and symbol description Indicates the remaining power and charging status of the meter battery Indicates that the current instrument has turned on the automatic shutdown function which is turned on by default Indicates that the current instrument has turned on Bluetooth data and it is turned off by default Indicates that the instrument has automatica...

Page 7: ...tention to safety VII Measuring principle 7 1 Principle of AC 4 terminal test method An AC current I with a frequency of 1KHz flows between the positive and negative electrodes of the battery and the AC voltage difference V between the positive and negative electrodes of the battery is measured and the internal resistance of the battery is calculated according to the formula R V I In order to ensu...

Page 8: ...ument time measured value and instrument status information The functions of the operation buttons are as follows Keep data Enter the settings menu Resistance measurement shift Voltage measurement shift Zero or cancel zero Turn automatic gear shift on or off Enter data reading mode Turn Bluetooth on or off Turn software filtering on or off 8 3 Setting menu interface operation Press SET on the test...

Page 9: ... interface indicates that the machine has turned on the automatic gear shift function Select function Save and return Return 5 Clock setting The clock setting interface can set the time of the instrument The time display format of this instrument is XX year XX month XX day XX hour XX minute XX second or through our company The supporting software is connected to the computer or mobile phone to syn...

Page 10: ...be displayed if it is not connected 8 5 Data storage The data storage function needs to turn on the Keep Storage function in the settings please refer to section 8 3 3 and it is turned on by default at the factory It will automatically number and store a set of data each time manual HOLD or automatic HOLD This meter has 10 data memories Numbers A J can be selected in the settings When all memories...

Page 11: ... to ten seconds After the connection is successful it can read real time measurement values read historical measurement records synchronize the computer time to the meter and other functions 8 8 Communicate with smartphone or tablet Please confirm before use 1 The phone or tablet system version is Android 5 0 or higher 2 The Battery Internal Resistance Tester APP is installed in the smart device I...

Page 12: ... the calibration cycle according to the customer s use condition or environment and entrust our company to perform calibration on a regular basis 2 Clean When cleaning the instrument please use a soft cloth dipped in a small amount of water or neutral detergent and then wipe it gently Please gently wipe the display area with a dry soft cloth Please do not use gasoline alcohol acetone ether methyl ...

Page 13: ...Appendix Appendix 1 Influence of Eddy Current The AC current generated by this instrument induces eddy currents on nearby metal plates Affected by this eddy current an induced voltage will be induced on the test line Since the induced voltage and the AC current reference signal differ by 180 degrees in phase angle it cannot be eliminated by synchronous detection which leads to measurement errors T...

Page 14: ... synchronous detection circuit but when the level is large it will cause signal distortion and fail to perform correct synchronous detection The extension of the test line will increase the induced voltage Therefore to reduce the level of the induced voltage the length of the test line must be shortened as much as possible Especially shortening the bifurcation into two parts the effect is better E...

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