Extech Instruments BT100 User Manual

User's Guide

Battery Capacity Tester

Model BT100

Version 2.1 7/09

2

Introduction

The Battery Tester is designed for measuring the internal resistance and output voltage of
batteries including lead storage cell, nickel-cadmium battery, lithium-ion battery and nickel­metal hydride battery.

 AC four-terminal method to eliminates lead resistances and contact resistances and

yield the most accurate results.

 1kHz test current with up to 10µΩ resistance resolution.

 Dual display simultaneously indicates the internal resistance and voltage of the

battery.

 Comparator function with storage of up to 99 sets of resistance and voltage values for

battery deterioration characterization.

 Pin type and alligator type 4-terminal Kelvin leads for quick and accurate resistance

measurements.

 Memory capacity to store up to 999 manually stored data points or up to 9600 points

stored using interval datalogging.

 RS232 PC port and Windows compatible software.

Warranty

EXTECH INSTRUMENTS CORPORATION warrants the basic instrument to be free of defects in parts and
workmanship for one year from date of shipment (a six month limited warranty applies on sensors and cables). If it
should become necessary to return the instrument for service during or beyond the warranty period, contact the
Customer Service Department at [phone] EXTENSION 210 for authorization or visit www.extech.com

for
more information. A Return Authorization (RA) number must be issued before any product is returned to
Extech. The sender is responsible for shipping charges, freight, insurance and proper packaging to prevent
damage in transit. This warranty does not apply to defects resulting from action of the user such as misuse,
improper wiring, operation outside of specification, improper maintenance or repair, or unauthorized modification.
Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not
be liable for any direct, indirect, incidental or consequential damages. Extech's total liability is limited to repair or
replacement of the product. The warranty set forth above is inclusive and no other warranty, whether written or
oral, is expressed or implied.

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Specifications

Measuring method: Resistance (AC four-terminal method).

A/D conversion: Dual slope method.

Display: Dual display LCD and LEDs (comparator output).

Sampling rate: 1 set (resistance & voltage measurements)/second.

Open-Circuit terminal voltage: 3.5Vpp max.

Input over range: “OL” display.

Low battery detection:

display.

Test current fault detection: “- - - -” display.

Auto power off: After approximately 30 minutes.

Zero (Relative) function: Circuit offset voltage is displayed as 0V.

Hold function: Display is held.

Beeper function: Audible output for warning and fail results (can be

turned on and off).

Comparator settings: Resistance High and Low limits and voltage

threshhold point.

Number of comparator settings: 99 sets.

Comparator output: LEDs for pass (green), warning (yellow) and fail

(red) results, audible tone for warning and fail.

Resistance

Voltage

Lo IN Hi

Lo Warning Warning Fail

Hi PASS Warning Fail

Manual Data logging: 999 sets.

Continuous Data logging: 9600 sets.

Operating environment: 32 to 104°F (0

°

to 40

°C)

80%RH (non-condensing)

Storage environment: 14 to 122°F (-10

°

to 50

°C)

80%RH (non-condensing)

Power source: Six AA size 1.5V batteries. (AC adaptor (output

9VDC) is optional)

Maximum power consumption: 1.0VA

Continuous operating time: 7 hours approx.

Maximum altitude value usable: 2000m or less.

Size: 9.8x3.9x1.7” (250×100×45mm)

Weight: 1.1 lbs (500g) approx. (including batteries)

Accessories: Test Leads, Instruction Manual, Batteries.

Option: AC adaptor (9V DC output).

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Electrical Specifications

Conditions to guarantee accuracy:

Temperature: 23

°C ± 5°
Humidity: 80%RH or less (non-condensing).
Zero adjustment: After zero adjustment for each range.

Resistance measurement

Temperature coefficient: (

±

0.1% rdg ± 0.5digits)/°C

Measuring current frequency: 1KHz

±

10%

Measuring burden voltage:

1.5mVAC

Range Resolution Measurement current Accuracy

40mΩ 10µΩ 37.5mA approx.

400mΩ 100µΩ 3.75mA approx.

4Ω 1mΩ 375µA approx.

40Ω 10mΩ 37.5µA approx.

±

(1% reading ± 10digits)

Voltage Measurement

Temperature coefficient (

±

0.1%rdg±0.5digits)/

°C

Range Resolution Accuracy

4V 1mV

40V 10mV

±

(0.1% reading ± 6digits)

Maximum Input Voltage: 50VDC maximum, No AC voltage input, , 60VDC and AC
maximum between input terminals and ground.

DANGER

Do not exceed the maximum permissible input voltage to the measurement terminal. This
could result in injury or damage to the unit.

Version 2.1 7/09

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Meter Description

1.

Power button: Power on /off

2. R READ button:

 Press R button to show the manual
logged readings.
 Press R READ button again to stop
reading.

3. M MEMORY button:

 Under the manual logging mode, the
tester stores each single set of logged
reading to the memory by pressing
M MEMORY button.

 Press and hold M MEMORY button
for 2 seconds to enter continuous
logging mode. Press again to stop
logging.

4. V-RANGE button: Select the voltage

range. (4V, 40V)

5. HOLD button:

 Press HOLD button to freeze or unfreeze
the displayed reading.
 Press and hold HOLD button for 2
seconds to enter the interval time setting
mode for continuous data logging.

6. Ω - RANGE button: Select the resistance range. (40mΩ, 400mΩ, 4Ω, 40Ω)

7. REL button:

 Press  button to move the cursor to the right.

 Press REL (Relative) button to zero the reading.

8.  button : Press  button to increase the displayed value.

9. SET button:

 Press SET button to switch the comparator mode on or off.

 Press and hold the SET button for 2 seconds to enter the comparator-setting mode.

Press again to store the setting in memory.

10.  button: Press  button to decrease the displayed value.

11. 

Button:

 Press  button to move the cursor to the left.

 Press

button to turn the beeper on or off.

12. RS-232 connector: PC interface connector.

13. – Input jack: For connecting with the black test lead plug.

14. + Input jack: For connecting with the red test lead plug.

15. LCD display

16. AC adaptor input