Pite 3970 User manual

PITE3970 Battery Charger
User Manual
P-130731-V1.1
4/F, Bldg A, Chiwan Industrial Park, Shaodi Rd.,
Chiwan, Shekou Area, Shenzhen, China
TEL: [phone]
FAX: [phone]
www.pitetech.com

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Catalog
1. INTRODUCTION .....................................................................................................................................3
1.1 ACCESSORIES ...................................................................................................................................... 3
1.2 SAFETY INFORMATION........................................................................................................................... 4
1.3 OPERATING PRECAUTIONS.................................................................................................................... 5
2. OVERVIEW ............................................................................................................................................. 6
2.1 ABOUT PITE 3970................................................................................................................................ 6
2. 2DISPLAY AND KEYPAD .......................................................................................................................... 6
2.3 FEATURES............................................................................................................................................ 7
2.4 SPECIFICATION..................................................................................................................................... 7
2.5 MEASUREMENT FLOWCHART................................................................................................................. 8
3. MEASUREMENT PREPARATION.......................................................................................................... 8
3.1 CONNECTION ....................................................................................................................................... 9
3.1.1 Check Conditions ................................................................................................................. 9
3.1.2 Connection of Cables ........................................................................................................... 9
3.1.3 Connect with DAC .............................................................................................................. 11
3.2 POWER ON........................................................................................................................................ 11
4 BATTERY CHARGE............................................................................................................................... 11
5 SYSTEM MANAGEMENT & SETTING..................................................................................................12
5.1 TIME SETTING .................................................................................................................................... 12
5.2 SET STRING SERIAL NUMBER.............................................................................................................. 12
5.3 FUNCTION SETTING ............................................................................................................................ 13
5.4 DATA MANAGEMENT............................................................................................................................ 13
5.5 FIRMWARE VERSION AND UPDATE ....................................................................................................... 14
6 Data Management in PC Software.......................................................................................................14
6.1 SOFTWARE INSTALLATION ................................................................................................................... 14
6.2 VIEW DATA ......................................................................................................................................... 15
6.3 DATA IMPORT AND EXPORT.................................................................................................................. 16
7 SERVICE AND MAINTENANCE............................................................................................................16
7.1 CLEANING .......................................................................................................................................... 16
7.2 STORAGE........................................................................................................................................... 16
7.3 FAQ .................................................................................................................................................. 17
8 CONTACT PITE .....................................................................................................................................17

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1. INTRODUCTION
This Users Manual gives full information on how to use PITE 3970 Battery Charger safely and effectively. It
applies to all PITE 3970 models. Please read the manual carefully so as to obtain maximum performance
of the PITE 3970 and its accessories.
Warning: Read this manual completely before connecting and powering on the unit to avoid possible
damage caused by improper use of this instrument.
1.1 Accessories
After receiving the PITE 3970 unit, please ensure that no damage occurred during transportation. Upon
any damage or failure of operation based on this user manual, please contact your supplier immediately.
And kindly check if you have each items below:
PITE 3970 main unit (1)
AC Power Cord (1)
Load Cables (black and red, two-in-one)
USB (1)
Users Manual (1)
Ground wire (1)
PITE certificate (1)
Data Acquisition Case (DAC) *
Data Acquisition Leads *
Antenna (2) *
Data Communication Terminal (1) *
USB-RS232 converter (1) *
NOTE:
Parts marked with “*” above are all optional for wireless monitor of voltage for each cell. Amount of DAC
and DAC leads will vary depending on different charger models. They are NOT included in standard
models.
Pictures for the parts below are for your reference only. It may be slightly different to your unit. Please take
your real product as standard.
Standard parts:
PITE 3970 main body 3 phase power cord
Load cable (black and red)*

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Ground wire
User Manual
USB drive
Optional Parts:
DAC serial cable, 3-lead
DAC serial cable, 7-lead
USB-RS232 converter
Antenna
DAC Data Communication
Terminal
*NOTE: Based on different PITE 3970 models, main body may have different designing.
1.2 Safety Information
When you read this user manual, please carefully observe all warnings, precautions and instructions for
effective operation of PITE 3970.
WARNING: Servicing described in this manual is to be done only by qualified personnel. To avoid electrical
shock, do not service the instrument unless you are qualified enough under PITE’s instruction.
DANGER
Safety testing has been done on this instrument thoroughly
before shipment. However, mishandling during use could result
in injury or other bad consequences, as well as damage to the
instrument. Make sure that you understand the instructions and
precautions in the manual before use. We disclaim any
responsibility for accidents or injuries not resulted directly from
instrument defects.
Safety Symbols
Description of symbols used in this manual.
WARNING Indicates correct operation to prevent a significant hazard that
could result in serious injury or other bad consequences to
users or the product.

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NOTE Indicates advisory items related to performance or correct
operation of the instrument.
1.3 Operating Precautions
WARNING:
The electrical voltage and current used in battery testing is potentially lethal.
Before attempting any cleaning or maintenance of PITE 3970, please ensure that the AC power supply
is isolated and all batteries under test are disconnected. Do not connect or disconnect any of the
cables unless the circuit breaker (power control) is turned off.
Connection and disconnection procedures are extremely important. Be sure to follow the instructions
faithfully.
Do not touch conducting parts of the load cables or the power cord when they are connected to PITE
3970.
Explosion risk when using PITE 3970 (all models)
When a lead acid battery is charged i.e. when there is a current flow through the battery, it is always a
risk that the battery can explode.
For new open (vented) batteries the risk is medium to low but in old VRLA (sealed) batteries the risk is
medium to high.
If there is a bad connection inside the battery and there is a current flow - the connection will burn off
and there will be an arc, which will ignite the oxyhydrogen gas in the battery.
To minimize the risk for personnel injuries: Always place PITE 3970 as far away from the battery as
possible - use long load cables and do not stand close to a battery during charge.
If the external current measurement is interrupted or giving false values during the test, the current will
rise to a higher level than the set value before the test is shut down. If the battery is too small for this
current or in a bad condition - it may explode.
If you see any spark from batteries, testing cables or PITE 3970 main body, please switch off the unit
and disconnect all cables for further inspection.
IMPORTANT:
To use PITE 3970 efficiently and avoid electrical shock, fire or any damage to the PITE 3970 or its
accessories, please do read these precautions carefully before using PITE 3970:
Except as explained in this manual, do not attempt to service this equipment by yourself.
If you have wireless monitor with optional DAC, to avoid frequency interference, please do not run two
PITE 3970 simultaneously in the same location within 100 meters. If you really have to, please contact
PITE for presetting.
Before use, check to see if the nominal voltage ranges on the PITE 3970 matches the batteries that
you are going to test. Do not apply PITE 3970 of high voltage in lower ranges of battery system. For
example, if PITE 3970 nominal voltage is 220V, do not connect the charger with battery string of 48V.
Otherwise, batteries may explode.
Please make sure the output AC power supply is high-current withstanding. It is strongly suggested
that the AC power output is connected after protecting relay.
Do not operate the PITE 3970 around explosive gas or vapor.
Use only insulated load cables and test leads supplied with PITE 3970.
Before use, please inspect the PITE 3970, load cables, power cord and accessories for mechanical
damage and replace them immediately if they are damaged. Pay special attention to the insulation

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surrounding the connectors.
If you have more than one PITE 3970, please use them separately, do not mix them up. Their
accessories may not compromise with each other.
Remove all clamps, test leads and accessories that are not in use.
Make sure that the mains voltage and frequency fit the local AC power supply. Do not apply the unit to
voltages that are above the rated mains of the instrument.
Ensure that the equipment is provided with adequate ventilation. Do not block equipment ventilation
openings.
Proper installation is essential to the correct functioning of your analyzing software. If you have any
questions about installation, please contact your supplier for assistance.
If you need to charge the next battery string right after the first string, you are suggested to wait for at
least 5 minutes to let the unit cool down. This will extend the service life of the charger.
2. OVERVIEW
2.1 About PITE 3970
PITE 3970 adapts the third generation high-power switch model and state-of-art technique of soft-off.
Thanks to its high efficiency and reliability, it is now widely applied in different areas like telecom and power
utility for all standby battery strings.
2. 2 Display and Keypad
Operation panel of PITE 3970 main body is as below:
Fig.2.2.1
USB socket is for connection with USB drive for testing data exportation and firmware update.
The 6-button keypad enables you for quick navigation through the screen display or menu.
Fig.2.2.2 Keys Operation
Keys Functions

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▼▲Move up and down to highlight the selecting options
◄►
1. Change the numbers
2. Move back and forth to highlight the selecting
options
Confirm the selection or number input
Return to the previous menu
NOTE: Parallel com port is reserved for R&D purpose by PITE. It is not used by users.
2.3 Features
User friendly artwork, easy access to all components by operators.
Light weight designing enclosed with wheel and handle, convenient for transportation
State-of-art technique of soft-off which decreases switch deterioration by 40%
Strong to provide DC auxiliary supply during emergencies for protection and control equipments in
case of DC system failure.
Comply with requirements as in IEC 60146-1-1
Ventilation channel and circuit with dustproof structure
Accurate display for output voltage, current and other working status on LCD screen
Build-in CPU, automated management for battery charging
Auto calculation for changed time and changed capacity
Auto transforming from equalized charging to float charge
It could be combined with extra units for higher output power
DC power supply for relay protection equipment in experiment and adjustment
Capable to provide DC power supply for ground fault detection in DC circuit branch
Could be used as DC power supply in maintenance and examination of power project
Thermal protection, auto stop in overheating and auto start when temperature recover to be normal
Over-voltage protection and under-voltage warning function, suitable for unattended charging for
substation batteries
Protected from abnormal AC supply transient and surges
No reverse current from the battery or load feeding the charger
2.4 Specification
Output Range
Index
P1140 P2240
Output nom voltage 110V 220V
Voltage range 90V～143 V 176-288V
Output nom current 40A 40A
Current limit 0～105% nom output current
ENT
ESC

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Volt-stabilization accuracy ±0.2%
Current-stabilization accuracy ±0.2%
Ripple coefficient ±0.05（rms）, ±0.2%（peak）
Soft start time 3~8s
Charger Input Range
Input voltage 380V(-15%, +20%), 3p
Input Frequency 50Hz±10%
Input current 25A
Power factor 0.93 (Full load)
Overall efficiency 93% (Full load)
Other specification:
Temperature: －10℃~ 40℃(working)
－25℃~ 55℃(storage)
Altitude: <2000 M
Humility: <95% (daily), <90% (monthly)
Input volt: sinusoidal wave,
－15%nom~20％nom
Reliability: MTBF≥100000
Noise: ≤55dB
Cooling: Force air cooling
2.5 Measurement Flowchart
General steps of measurement for PITE 3970 as below:
1) Wear necessary protective clothing like helmet and insulating gloves.
2) Connect the 3 phase AC power cord
3) Connect load cables
4) Turn the power on
5) Select measuring mode and set parameters
6) Start measurement
7) Disconnect the test leads from battery when measurement is finished.
8) Turn off the power
9) Disconnect the power cord
3. MEASUREMENT PREPARATION
This section describes how to connect all the testing leads and cables in correct way and sequence. It is

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very important for the whole process of operation. For the safety of equipments and operators, please read
it carefully.
3.1 Connection
3.1.1 Check Conditions
Before any connection, make sure that:
1). The battery strings are not working and cut off from power supply.
2). There is enough space for testing. Do not test the unit around explosive gas or vapor.
3). The nominal voltage of the PITE 3970 matches that of the battery strings.
3.1.2 Connection of Cables
IMPORTANT: Power supply and control on-off (circuit breaker) should be turned off before all wire
connections. To ensure the safety, please turn on the control on-off ONLY when all the other connections
are finished.
All switches and cable sockets are at the back of the unit. Please see blow for the back panel of PITE 3970:
Fig 3.1.2.1
A. Connection of load cables
Connect one end (Anderson connector) of the load cable with the load cable socket of the PITE 3970 and
then clamp the other end respectively with negative pole and positive pole of battery string. Black clamp is
connected with negative pole and red clamp with positive.
Fig 3.1.2.2 Anderson Connector Fig 3.1.2.3 Load cables Connect with battery string

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WARNING: Make sure they are correctly and tightly connected to avoid electrical fire and short circuit. The
black and red load cables should be firstly connected with PITE 3970 main unit and then with battery string.
B. Connect with 3 phase AC power supply
Connect one end of power cord (with 3 colors as Fig 3.1.2.4) with 3 phase input socket with PITE 3970
main body and other ends with L1, L2 and L3 of 380V 3 phase power supply.
The same color code should be connected together as the back of main body.
Fig 3.1.2.4 Power Connector Fig 3.1.2.5 Three phase AC output
C. Connect the antenna to the top of PITE 3970 main body if the equipment is working with DAC for cell
voltage monitoring on PC. Otherwise, no need to connect it. Below is the picture of back panel after wire
connection with AC power supply, and load cable.
Fig 3.1.2.6 three phase AC input