Hioki 3550 Manual de usuario

3550 Series Battery HiTESTERs

User's Guide

September 1999

HIOKI E. E. CORPORATION

Author: R&D OFFICE II

Editor: Technical Sales Support Section

81 Koizumi

Ueda-shi, Nagano-ken JAPAN

os-com@hioki.co.jp

http://www.hioki.co.jp

CONTENTS

1Display …………………………… 2

Q 1 - 3

2Printer Output/Memory …………………………… 2

Q1 - 8

3Comparator …………………………… 4

Q1 - 7

4Input Protection …………………………… 6

Q1 - 3

5Leads …………………………… 7

Q1 - 15

6Resistance Measurement …………………………… 9

Q1 - 14

7Voltage Measurement …………………………… 14

8Temperature Measurement …………………………… 14

Q1 - 2

9Batteries …………………………… 15

Q1 - 13

10 Miscellaneous …………………………… 19

Q1 - 19

11 References …………………………… 23

Questions & Answers

3550BatteryHiTESTERSeries

1Display………………………………………………………………...

Q1. Why does the 3550 series

comparator display a warning

when it finds the resistance of a

battery to be between the upper

and lower limits, i.e., (lower

limit resistance value)

<resistance < (upper limit

resistance value)?

A1. When a battery is new, it has a low internal

resistance, but as the battery deteriorates the

internal resistance becomes larger. This is due

to corrosion on the plates, loss of electrolytic

solution, etc. Therefore, when the comparator

is found to be in the "IN"condition during battery

maintenance work, a warning is generated.

However, when the battery is shipped from the

factory, it passes inspection as long as it falls

between the upper and lower limits for both

resistance and voltage. At HIOKI, we use

these units in combination with the 3225 and the

3236.

Q2. If a negative voltage is displayed,

the comparator makes an

incorrect evaluation if the polarity

of the test leads is reversed

when connected to the battery.

(To be more precise, rather than

incorrectly evaluating the

voltage, it judges the voltage

low.) Is it possible to ignore the

negative polarity for the

evaluation?

A2. Although it is not possible with the 3550 series,

we will consider implementing such a capability

in a future BATTERY HiTESTER/AC

mΩHiTESTER.

Q3. After inserting batteries in the

3551 (or connecting the AC

adapter), power does not come

on immediately. Is this a

defect?

A3. When batteries are first inserted or when

batteries were fully depleted and are replaced

(or when the AC adapter is connected), the unit

will not come on for about 15 seconds. This is

because the internal backup capacitor is being

charged. It is not a defect. Information about

this point is included in the manual.

3550 Battery HiTESTER Series

2Printer Output/Memory………………………………………………

Q1. How can I load data stored in

memory into a personal

computer?

A1. Refer to the reference material at the end of

this sales guide. The material describes how

to use the 3550 and 3551's printer output to

load data from memory into a personal

computer. The method that is described

uses a commercially available RS- 232C

converter to load the data into a personal

computer running under Windows 95.Hyper

Terminal, provided with Windows 95, is the

software that is used.

Note:Units (Ω, V, C, etc.) are also output.

Q2. Is conversion of output to

Centronics - RS- 232C

possible?

A2. At present, the 3550 can store 260, 3551 can

store 250 items of data in memory. Because

the memory in the unit is already being used

to the fullest extent possible, it is not possible

to increase the amount of data that can be

stored in memory.

Q3. Is it possible to increase the

amount of data that can be

stored in memory?

A3. When batteries are first inserted or when

batteries were fully depleted and are replaced

(or when the AC adapter is connected), the

unit will not come on for about 15 seconds.

This is because the internal backup capacitor

is being charged. It is not a defect.

Information about this point is included in the

manual.

Q4. I have imported the data to a PC

and want to process them with

Microsoft Excel, but the unit

symbols prevent proper

calculation or graph display.

What should I do?

A4. Unit symbols such as "Ω", "V", or "C" can be

deleted using the global replace function of

Excel.

Q5. Can measurement data be

selectively deleted or added? A5. With the 3550 and 3551, it is only possible to

delete the latest data or all data. The 3551

has a new function which allows over writing

data selectively.

Q6. Can I print out measurement

data selectively? A.6 This is not possible. The 3550 and 3551

send all data to the 9203 in one operation,

and the 9203 prints all of these data.

Refer to the reference

material at the end of

guide.

3550BatteryHiTESTERSeries

Q7. I want to externally control

EXT.HOLD and EXT.MEMO.

Where is the circuit common

point? Is it possible to perform

control with 0/5 V (CMOS

level)?

A7. Refer to the circuit configuration of EXT.HOLD

and EXT.MEMO shown below.The internal

circuit operates at 5 V. Control at the CMOS

level is therefore possible.

Q8. Does the printout differ,

depending on the software

version of the 9203?

A8. The software version and compatible models

are listed below.

Ver.1.00:3227

Ver.1.01:3550, 3227

Ver.1.10:3550, 3551, 3227

When version 1.10 is used and the 3550 is

connected, "NG" is displayed as "- - ".

When the 3551 is connected, printout is as

explained in the manual. When version 1.01

is used and the 3551 is connected, the 3 m

Ωrange cannot be printed. For details,

please contact the HIOKI Head Office.

3Comparator…………...………………………………………………

Q1. Is it possible for HIOKI to

research the battery data and

write the comparator values to

memory?

A1. Although HIOKI is engaged in battery

charging and discharging tests, the data

generated by these tests is intended only for

reference purposes. Users must provide the

data on individual batteries.

Q2. Is it possible to increase the

number of comparator? A2. Yes. It is possible to increase the number of

comparator numbers up to 30(3550 and 3555

but 3551 is not possible). Such cases are

handled as special orders.

Q3. Is it possible to input upper and

lower limit values for a voltage

comparator?

A3. This is not possible with the 3550 series.

Inspections conducted by the battery

manufacturer when the batteries are shipped

from the factor are performed with upper and

lower limit values. However, if the voltage

is higher than normal during maintenance

3550 Battery HiTESTER Series

work, a failure in one of the other batteries

that is connected in series in a UPS could be

causing a relative increase in the battery

voltage, or the charger could be

malfunctioning. Increases in a battery's

voltage that are discovered during

maintenance appear never to be the result of

a problem with the battery itself.

Q4. Is it possible to use the

comparator for voltage only? A4. Set the upper and lower limit values of the

comparator to 3000 (3550 and 3555), 3100

(3551) in the resistance range that is being

used. It is then possible to set the voltage

range and voltage comparison value to the

desired value. If the voltage exceeds the

comparison value, the PASS indicator lights; if

the voltage is equal to or less than the

comparison value, the WARNING indicator

flashes. However, if the resistance value is

too large and a constant current error occurs,

[- - - - ] is displayed and no LED lights.

Q5. Can the battery type number be

displayed instead of the

comparator number?

A5. This is not possible, because it would require

not only a software upgrade but also a new

LCD.

Q6. I want to measure a 48 V battery

assembly. Since voltage

evaluation is not needed, can

evaluation be based on

impedance only?

A.6 The maximum input voltage is 50 V DC for the

3550 and 3555 and 60 V DC for the 3551.

Therefore the impedance of a 48 V battery

assembly can be measured if voltage

evaluation is not required. Use the

comparator setting screen and set the voltage

comparator value to - 3000dgt (3551: -

3100dgt).

Q7. Is it possible to obtain separate

comparator outputs for

resistance and voltage?

A7. Because resistance and voltage comparator

output is obtained by software, it is not

possible to obtain separate comparator

outputs for resistance and voltage.

4Input Protection….…...………………………………………………

Q1. Is input overvoltage protection

implemented, and how? A1. Basically, in the case of both the 3550, 3555

and the 3551, it is not possible to input voltage

in excess of 50V DC (3551:60V DC), nor is it

possible to input AC voltage or current. If

such voltage or current is input, the unit will be

damaged. Although a design change that

adds a fuse will be implemented in new lots in

the near future in order to minimize the

number of failures resulting from such mis-

operation, the fuse will not be user

replaceable. Note that any unit failures

caused by overvoltage input will only be

repaired for a fee.

3550BatteryHiTESTERSeries

Q2. Can maximum allowable input

voltage be increased? A2. This is a frequently expressed request for the

3550 and 3551. However, for reasons of

safety and because extensive parts

modifications would be required, it is not

possible to increase the rated maximum input

voltage of the 3550 series models. The 3551

has passed overload tests up to 400 V DC.

When a voltage of about 330 V or more is

applied, an intermittent warning tone will be

heard. However, when high voltage is

applied, sparks are produced when the input

coupling capacitor is charged, which can be

dangerous. The rated maximum input

voltage therefore is 60 V DC.

Q3. What type of damage will occur

for various types of mis-

operation?

A3. If AC voltage is input, depending on the

amount of voltage, the surge absorber will be

damaged, and the fuse will be damaged (once

the design change for adding the fuse is

implemented).In some cases, the A/D

converter will also be damaged. If

overvoltage is input, the capacitor and surge

absorber will be damaged. If a battery is

inserted with reversed polarity, the battery will

leak and the power supply circuitry will be

damaged.

5Leads……...…………...……………………………………………

Q1. Will the spring pressure of the

9460 be increased?A1. Compared to when the product was initially

released, the diameter of the spring has been

increased, resulting in greater strength.

Q2. Will the tip of the 9461 pin be

made rounder? A nd will the

spring pressure of the pin tip be

reduced?

A2. The pin tip has been made rounder, and the

spring pressure has been reduced. As a

result, the tip will be less likely to damage ba

ttery terminals.

Q3. Will the tip of the 9461 pin be

made thinner? A3. The 9174- 02 semi- standard product can be

used with the 3550 and 3555. However,

because the probes are not red and black, the

user must mark them by wrapping them with

red or black tape, as appropriate. In addition,

the 9461 can be modified for special orders.

However, because pin tip 1172 is a four-

terminal probe that was developed for in-

circuit testing, it offers extremely high

accuracy, but is susceptible to damage when

used manually.

3550 Battery HiTESTER Series

9465 PIN-TYPE

LEADS

Q4. Is it possible to special order the

9460 CLIP- TYPE LEADS WITH

TEMPERATURE SENSO R with

a wider opening between the

jaws?

A4. We provided 9467 LARGE CLIP TYPE

LEADS. But it can not measure temperature.

Q5. Is it possible to extend the

leads? A5. We have confirmed that it is possible to

extend the leads up to 5m.However, only the

thick, bundled portion between the points

where the leads branch out at each end can

be extended. Note also that extending the

leads results in increased susceptibility to

external noise, so in some environments the

measured values may fluctuate.

Q6. Describe the pin arrangements,

including shielding, so that we

can produce our own leads.

A.6 The pin arrangements are indicated on the

3550 and the 3555 themselves. In addition,

the shielding wires in the 9460 and 9461 are

connected to SENSE- LO.

Q7. Can the 9287 CLIP- TYPE

LEADS be used With the 3550

series?

A7. Yes, with some restrictions. Because the

9287 leads are test leads for low- resistance

meters, they are not designed to be used to

test objects to which voltage is being input.

Therefore, they cannot be used in the

maintenance of batteries used in a UPS, for

example. When checking a battery by itself

(less than absolute maximum input voltage),

the 9287 leads can be used without any

problems.

Q8. Can the 9461PIN- TYPE

LEADS be used with

the 3550 and 3551?

A8. Yes, with some restrictions. Because the

9461 leads are test leads for the 3555, they

are designed to be used at less than 50V DC.

Therefore, they cannot be used in the

maintenance of batteries used in a UPS, for

example. When checking a battery by itself

(less than absolute maximum input voltage),

the 9461 leads can be used without any

problems.

Q9. Can the 9465 PIN- TYPE

LEADS be extended? A9. When the 3551 is used, no extension is

possible because measurement values would

become unstable. With the 3550 and 3555,

extension for up to five meters is possible.

Only the heavy- gauge part between junctions

can be extended.

3550BatteryHiTESTERSeries

Q10. Can the 9173 FOUR-

TERMINAL LEADS be modified

to use banana plugs?

A10. This is possible only when used with the

3555.Precision assurance with the 3550 and

3551 is not given. The 9173 is available as a

special- order option with banana plugs.

Q11. The pin tip of the 9465 PIN-

TYPE LEADS has become

damaged. Is it possible to

replace the pin tip only?

A11 The measurement leads cannot be repaired.

A new lead must be purchased. 3550 series

BATTERY HiTESTER

Q12. What are the usage limitations

of the 9287 CLIP- TYPE LEADS

and 9467 LARGE CLIP TYPE

LEADS?

A12. The 9287 can only be used with the

3555.Because the 9287 has no barrier at the

clip section, measuring a UPS battery involves

a risk of electric shock and is therefore not

allowed with the 3550 and 3551.The 9467 can

be used with all models, but with the 3551,

measurement results will differ by about

15dgt.in the 3 m Ωrange, due to measurement

lead length.

Q13. Can the lead of the 9466

REMOTE CONTROL SWITCH

incorporated in the 9465 PIN-

TYPE LEADS?

A13. This is not possible. Internally, the

EXT.MEMO/EXT.HOLD and measurement

terminal wiring circuits are insulated, but if the

9466 lead is run together with the 9465 lead,

the 2.3 kV rms rating will no longer apply and

a risk of electric shock exists.

Q14. Can the zero adjustment board

also be used with the 9461 PIN-

TYPE LEADS? Can zero

adjustment be performed by

using a thick metal plate in place

of the zero adjustment board?

A14. The zero adjustment board can also be used

with the 9461.A thick metal plate cannot be

used in place of the zero adjustment board,

because the resistance of that plate would be

measured.

Q15. Can the 9465 PIN- TYPE

LEADS be used with the 3550? A15. Yes, but not for temperature measurements.

Zero adjustment must be performed with the

zero adjustment board.

3550 Battery HiTESTER Series

6Resistance Measurement…...………………………………………

Q1. Can the impedance of a battery

not be measured with a DC type

ohmmeter?

A1. A DC type ohmmeter applies a constant DC

current and measures the voltage reduction

caused by the load to determine the

resistance. In the case of a battery, its

electromotive force prevents correct

measurement of impedance using such a

setup. In order to eliminate the influence of the

battery's electromotive force, an AC type

ohmmeter must be used.

Q2. Why is testing conducted with a

1kHz AC current? A2. There is no standard or rule that requires

battery testing to be conducted with a 1kHz

current. The reason why testing is

conducted at 1kHz is due to the current flow of

existing AC- type resistance meters. AC-

type resistance meters were developed for

measuring contact resistance. Contact

resistance meters conform to IEC512- 2,JIS C

5402,and JIS C 5441,and one item in these

standards calls for testing to be conducted at

1kHz. Accordingly, the majority of AC

resistance meters are designed for 1kHz

testing. Because commercially available

resistance meters are frequently used for

measuring the internal resistance of a battery,

a considerable amount of data on

measurements taken at 1kHz has been

accumulated. Therefore, in order to maintain

compatibility with this previously accumulated

data, we decided to design the 3550 series to

take measurements at the 1kHz frequency.

While we realize the internal resistance of a

battery is frequency- dependent, there are

indications that this characteristic is relatively

flat between 100Hz and 1kHz.

Q3. Can the range used by the 3550

series be changed? A3. It is not possible at present to change the

testing range.

Q4. Can the testing current be

changed? A4. If the testing current is changed, the voltmeter

gain must also be changed at the same time.

Changing the gain is an extremely delicate

proposition, since it is accompanied by

changes in the temperature characteristics,

noise characteristics, etc. Therefore, it is not

possible to change the testing current. We

will study this issue when we develop future

AC m ΩHiTESTERs.

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