Download-Megger Biddle BITE 2P Battery

Download-Megger Biddle BITE 2P Battery
AVO INTERNATIONAL
BIDDLE BITE 2P
BRINGING RELIABILITY TO AMPS • VOLTS • OHMS

BIDDLE
BITE 2P

• Determines state-ofcondition of lead-acid and
NiCd cells up to 7000 Ah
• On-board Pass/Warning/
Fail indications
• A robust, all-in-one unit
• On-line Testing
Battery Impedance Test Equipment
DESCRIPTION
The Biddle® BITE 2P Battery Impedance Test Equipment determines the
condition of lead-acid and nickel-cadmium cells up to 7000 Ah. An advanced
feature set has been developed that
includes Pass/Warning/Fail calculations based on a user-entered baseline
value, advanced printing functions and
more. The case of the BITE 2P consists
of both the transmitter and a carrying
case for all of the standard accessories and some of the optional accessories, in a “grab-and-go” unit.
The instrument works by applying a
test current across the battery string
while on-line, then measuring the total
ac current (ac ripple + test current)
and the ac voltage drop of each cell/
jar. It then calculates the impedance.
The BITE 2P also measures dc voltage
and interconnection (strap) resistance
to help determine the overall condition of the entire battery string’s electrical path from terminal plate to
terminal plate.
The BITE 2P receiver stores the readings in its internal memory. These
measurements, along with other maintenance data such as ambient and pilot cell temperatures and ac ripple
current, assist in determining the overall condition of battery systems.
AVO International recommends that
impedance measurements with the
BITE 2P be made part of a battery
maintenance program with readings
taken and recorded semiannually for
flooded batteries and quarterly for
VRLA.
BULLETIN-1 AVTBBITE2P 11/00
Unlike load cycle testing that involves
substantial downtime and repeated
discharges, using the BITE 2P requires
no battery discharge, nor does it
stress the battery in any way compared to other techniques. With a test
time of less than 30 seconds for each
cell and intercell connector, one person can easily, quickly and precisely
measure internal cell impedance, dc
terminal voltage and intercell connection resistance without taking the battery system off line.
At any time while performing a test,
the operator can review the current
test results by using arrow keys and
scrolling back through the active test
screen. The operator can also print
the active test using the BITE 2P transmitter printer. If needed, the operator
can retest any of the cells and straps
in the current test. Stored data can
also be downloaded via the RS-232
connector directly to a personal computer or the BITE 2P transmitter
printer.
Naturally, everything you need to perform these tests is included with the
basic instrument. There is a full line of
optional accessories to enhance the
capabilities of the BITE 2P. It has the
ability to download to a PC for database use and further data analysis.
Additionally, the BITE 2P has a built-in
printer to review the active test, and
leave a hard copy record at the site.
One additional feature of the receiver
is that if the operator is called away
while in the middle of the test, simply
shut down the instrument and it will
remember where the operator left off
in the test. This is especially useful
when measuring large UPS strings.
Receiver
The battery-operated receiver incorporates the potential leads, clamp-on
current sensor, and data storage capabilities. It stores more than 2000 sets
of data (cell impedance, cell voltage
and interconnecting strap resistance,
date and time stamps) in up to 300
tests. It also allows for printing the
active test for easy review and retest.
Selective printing of any test and deleting oldest tests are now included
features to maintain in memory the
most critical tests.
The clamp-on current sensor is connected to the receiver during testing
and clamped around a convenient
intertier or intercell connection within
the loop created by the transmitter’s
current source leads and the battery
string. If the intercell or intertier connection used consists of more cables
than the diameter of the clamp-on current sensor can encompass, the receiver has a split-strap function. There
is an optional RopeCTTM available for
large busswork. With the optional barcode wand, additional information can
be recorded and stored such as location ID, user ID, ambient and pilot cell
temperatures. There is space for specific gravities to be written on the
printout.
AVO INTERNATIONAL IS REGISTERED TO ISO 9001 STANDARD
BIDDLE BITE 2P
Transmitter
The transmitter provides the capacitively coupled ac test current to avoid
transients on the dc buss and applies
the test current to the cells under test
via the current source leads. The BITE
2P transmitter has an LCD, built-in
printer and receiver charger.
Data collected and stored in the receiver can be printed to the BITE 2P
transmitter printer where it can be reviewed. Figure 1 shows a sample printout of a full battery analysis report.
APPLICATIONS
A battery’s internal impedance increases with decreasing capacity due
to various conditions such as age, ambient temperature, discharge history,
etc. See Figure 2. The BITE 2P measures impedance values and dc voltage for lead-acid and nickel-cadmium
cells up to 7000 Ah capacity.
Impedance finds electrical path problems due to plate sulphation, post-seal
corrosion, dry-out, poor intracell and
intercell connections. This information lets the operator determine maintenance needs such as:
• Cell replacement criteria based on
impedance trends.
Battery Analysis Report
Location ID:
User ID: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Notes: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
_________________________________
Ambient Temp:
Pilot Temp:
Ripple Current:
.01A
Multiplier: 1
B/W/F:
Test AC Current: 9.8 A
11.00 mΩ/20%/40%
Sp.Gr.
Zb mΩ P/W/F % RS mΩ Volts DC
12.09
P 09
0.412
13.52
14.02
W 27
0.405
13.59
12.22
P 11
0.407
13.34
14.54
W 32
0.403
13.48
12.60
P 14
0.042
13.27
12.32
P 09
0.405
13.38
Cell Impedance Summary
Minimum
Average
Maximum
12.09
12.97
14.54
Percent Deviation from Average
-10
0
10
20
30
001
002
003
004
005
006
Figure 1. Sample battery analysis
report
Time
11:13
11:14
11:14
11:15
11:16
11:17
• Enhanced printing and memory
functions.
• Calculates impedance automatically
and stores results for on-site review.
• Does not stress or discharge the battery in any way.
• Receiver has an RS-232 connector
for downloading stored data to a
personal computer.
• Reduced test time; less than 30 seconds for each cell.
• Jumpering out a cell or two.
• Measures impedance and dc voltage values for all lead-acid and
nickel-cadmium cells up to 7000 Ah.
• Clean and/or retorque intercell connectors.
• Stores more than 2000 sets of readings in up to 300 tests.
• Change the maintenance interval,
etc.
Typical installations that can be tested
using the BITE 2P include:
• Electrical power generation plants
05-SEP-2000
Cell
001
002
003
004
005
006
FEATURES AND BENEFITS
• On-line testing requiring no downtime.
• Substations — utility, railroad,
industrial
• Telecommunications facilities —
CO, Wireline, Wireless, MTSO
• UPS systems
• Railroad — Signals and Communications, Substations
• Aircraft power supplies
• Marine, military and many other
applications.
TEST PROCEDURE
The BITE 2P instrument works by applying a capacitively coupled ac test
current across the battery string while
on-line. The receiver and potential
probe are placed at the cell terminals
to measure the ac voltage drop and
total ac current across each cell/jar.
During each measurement, impedance
is calculated following Ohm’s Law, displayed on the LCD and stored. It also
measures, displays and records interconnection (strap) resistance to help
determine the overall condition of the
entire battery string’s electrical path
from terminal plate to terminal plate.
The BITE 2P receiver stores the readings in its internal memory. These
measurements, along with other maintenance data such as ambient and pilot cell temperatures and ac ripple
current, assist in determining the overall condition of battery systems. Figure 3 shows a typical test setup.
BIDDLE BITE 2P
Interpretation of Readings
Data produced by the BITE 2P can be
interpreted in several modes: Instantaneous, short-term and long-term
time frames. An impedance distribution plot, Figure 4, assists in the analysis.
Instantaneous Interpretation
The operator can enter a baseline
value from either the impedance measurements obtained at commissioning
or from the AVO web site. The percent
changes from baseline for warning and
fail levels are entered. But 20% and
40% are the default settings. The LCD
on the receiver will display the status
of the cell for a few seconds before
proceeding to the next cell. The status
of each cell/jar will be printed on the
Battery Analysis Report.
Short-Term Interpretation
Impedance readings for individual
cells can be used in the short term to
compare with the average impedance
readings for the entire battery string.
Individual cell values with deviations
of more than ± 15 percent for flooded
lead-acid, ±35% for VRLA and 50% for
NiCd cells from the battery string average typically indicate a problem with
that cell(s). AVO International recommends additional investigation of such
cells including a verification of intercell connections and a single cell loadcycle test.
Long-Term Interpretation
Impedance readings for the entire battery can be used in the long term to
determine replacement criteria. Battery cell impedance values should be
recorded and compared to previous
readings to determine the position of
the cell on the curve of impedance
versus cell life as shown in Figure 2.
Based on experience, a variation of
±20% from baseline for flooded leadacid, ± 40% for VRLA and 50 percent
for NiCd cells indicate significant
change in the electrical path to warrant serious evaluation of the condition of the battery system. AVO
International maintains a database of
impedance values by some manufacturers and battery size/type. For comparison purposes, this information is
available upon request.
Figure 2. Impedance increases with battery age (and weakness).
Figure 3. A typical test set-up.
Figure 4. Ascending impedance compared to load test
BIDDLE BITE 2P
SPECIFICATIONS
Application
The BITE 2P tests lead-acid and nickelcadmium cells up to 7000 Ah.
Receiver
Accuracy
ac impedance ±(5% of rdg +1 LSD)
Maximum Total Voltage at Current
Source Leads
275 V dc (larger battery systems can
be sectioned to accommodate this
specification)
Reproducibility
ac impedance: < 0.3% one sigma
Transmitter
Supply Voltage
100 to 130 V, 50/60 Hz, 200 VA max
210 to 250 V, 50/60 Hz, 200 VA max
dc voltage ±(1% of rdg +1 LSD)
dc voltage: < 0.1% one sigma
Voltage Range and Resolution
1 to 2.500 V dc, 1 mV resolution
2.5 to 25.00 V dc, 10 mV resolution
Impedance Range and Resolution
0 to 1.000 mΩ, 1 µ Ω resolution
1 to 10.00 mΩ, 10 µ Ω resolution
Source Output Current
10 A nominal, 50/60 Hz operation
10 to 100.0 mΩ, 0.1 mΩ resolution
Maximum Battery String Test Voltage
275 V dc at source lead terminals
(section the battery if >275 Vdc)
BITE 2P Display
Digital LCD meter, 0 to 15 A
Supply
4.8 V dc, 800 mAh, quick charge
nickel-cadmium battery pack
Battery Pack Life, Full Charge
5 hours continuous
BITE 2P Printer
Built-in thermal, with 4.25 in. (110
mm) printing width
Charger (built-in)
Output
6.50 V dc @ 1.10 A dc charging (max)
Maximum Cell/Jar Test Voltage
25 V dc between receiver and potential probe
Display
LCD, 2 x 16 characters
Temperature
Operating: 32 to 105o F (0 to 40o C)
Storage: -5 to 130o F (-20 to 55o C)
Humidity: 20 to 90% RH,
noncondensing
Clamp Range
Standard CT
2.0 in. (50 mm) maximum opening
Optional Miniature CT
0.5 in. (12 mm) maximum opening
Optional RopeCTTM
12 in. opening, approx.
Safety
Designed to meet IEC 1010-1
Dimensions
Transmitter
12 H x 19.6 W x 11.1 D in.
(30 H x 50 W x 28 D cm)
Receiver (irregular shape)
7.25 H x 11.25 W x 2 D in.
(18 H x 29 W x 5 D cm)
Weight
Transmitter
18 lb (8.2 kg) alone
32 lbs. (14.5 kg) packed
Receiver
1.6 lb (0.7 kg)
9.60 V dc open circuit
ORDERING INFORMATION
Item (Qty)
Cat. No.
Item (Qty)
Cat. No.
BITE 2P, 110/230 V ac, 50/60 Hz, CE-Marked ............... .246004
Optional Accessories
Included Accessories
Current sensor 0.5 in. (12 mm)
opening with 2.5 ft (0.8 m) lead .............................. 246034
Current sensor, RopeCTTM 24 in. (60 cm) length ......... 246050
Current sensor, RopeCTTM 36 in. (90 cm) length ......... 246051
CT extension cable, 20 ft (6 m) ...................................... 246033
Current source leads, 10 ft (3 m), fused ....................... 246147
Current source leads, 30 ft (9.1 m), fused .................... 246347
Current source leads, 40 ft (12.2 m), fused .................. 246447
Bar-code wand Kit ........................................................... 246201
Bar-code labeling software, Windows® ......................... 246039
Quick Guide, English ...................................... AVTM246004G-E
Guide de Référence, Français ........................ AVTM246006G-F
Kurzüberblick, Deutsch ................................. AVTM246004G-D
Guía Rápida, Español ..................................... AVTM246004G-S
Quick Guide, Português ................................. AVTM246004G-P
Transmitter ................................................................ 30044-100
Receiver . ......................................................................... 30620-3
Current Source Leads, 20 ft (6 m), fused ..................... 29386-2
Current sensor, 2 in. (50 mm)
opening with 5 ft (1.5 m) lead ................................... 33863
CT extension cable, 6 ft (1.8 m) .................................... 33864-1
Communication cable, 6 ft (1.8 m) .................................. 35340
Thermal paper ................................................................... 26999
AVOLink for Windows® .................................................. 35303-2
ac line cord, 8 ft (2.5 m) .................................................... 17032
Instruction manual ............................................... AVTM246004
UNITED STATES
4651 S. WESTMORELAND ROAD
DALLAS, TX 75237-1017 USA
PHONE: (800) 723-AVO-1 (723-2861)
FAX: (214) 333-3533
PO BOX 9007
VALLEY FORGE, PA 19485-1007
PHONE: (610) 676-8500
FAX: (610) 676-8610
CANADA
110 MILNER AVENUE, UNIT 1
SCARBOROUGH, ON M1S 3R2, CANADA
PHONE: (800) 567-0-AVO (567-2686)
FAX: (416) 298-0848
© 2000 AVO INTERNATIONAL
MIL/1500/1100 BULLETIN-1 BITE2P
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising