Procedure
1
Make sure that power of the instrument to connect
the L2020 to is off.
2
Connect the L2020 to
the input terminal of the
instrument.
Red
Black
Align the similarly
colored
marks.
3
Perform zero adjustment.
Be sure to use a zero
adjustment board which is
the accessory or option of
connectable instrument.
(See the instruction manual for
details of connectable devices.)
SOURCE
SENSE
Zero adjustment board
4
Connect the L2020 to a sample.
Part Names
(1)
(1)
(3)
(5)
(4)
(2)
(1)
Protective cap
Remove this cap before use.
Reattach the cap when not using the lead.
(2)
Conductive contact pin
(3)
Grip
(4)
SOURCE connector
(5)
SENSE connector
Enlarged view of pin
13.5
φ
1.27
φ
2.9
φ
2.7
Unit: mm
1
Specification
General Specification
Operating
environment
Indoors, Pollution Degree 2, altitude up
to 2000 m (6562 ft.)
Operating temperature
and humidity
0°C to 40°C (32°F to 104°F),
80% RH or less (no condensation)
Storage temperature
and humidity
-10°C to 50°C (14°F to 122°F),
80% RH or less (no condensation)
Dimensions
Approx. 1950 mm (76.77″)
Mass
Approx. 210 g (7.4 oz.)
Accessory
Instruction manual
Option
Model 9465-90 Tip Pin
Basic Specification
Rated current
2 A AC/DC continuous
Maximum rated
voltage to earth
Effective value 30 V, Peak value 42.4 V,
Direct current 60 V
Measurement
connector
SOURCE Hi, SOURCE Lo, SENSE Hi,
SENSE Lo
No GUARD connector
Replacing the Pin Tip (Option)
The conductive contact pin is replaceable. Replace the pin
with a new one if it is broken or worn. Purchase the 9465-90
Pin Tip, which includes the conductor contact pin and the pin
base (plastic portion).
1
Turn off the power of the instrument and remove
the L2020.
2
Rotate the grip to loosen
it.
Beware of injury.
The tip has a sharp point.
3
Remove the pin tip.
9465-90 Pin Tip
4
Replace the pin tip to a
new one.
9465-90 Pin Tip
5
Rotate the grip to fasten
it.
Be sure to fasten it tightly.
6
To avoid broken wires and contact failures, check
that the cable is firmly held
7
Check the performance.
Measure an object with a known resistance. Make
sure that
the measured resistance is correct before using the pin type
lead.
IMPORTANT
Measurement values when using 4-terminal measurement
(Differences in measurement values due to pin type leads
used)
Depending on the subject of measurement, such as a lead-acid
battery, measurement values may vary due to the pin type lead
used. Since these differences in measurement values are due to
the shapes and dimensions of the pin type leads used in 4-terminal
measurement, measurement values taken using any pin type lead
represent the true values for that pin type lead only.
When judging battery wear using changes in resistance values with
time, be sure to use pin type leads having the same dimensions.
Reference example: measurement of an MSE-200 valve-regulated
stationary lead-acid battery
(Resistance values vary according to the materials and structure of
the terminals of the subject of measurement.)
Pin type lead (Distance between
the current-impression pin and the
voltage-measurement pin)
Measurement values
using the BT3554
Battery Tester
L2020 Pin Type Lead (0.65 mm)
0.538 m
Ω
9772 Pin Type Lead (2.5 mm)
0.490 m
Ω
See the BT3554 Battery Tester Instruction manual for detailed
technical descriptions.
Explanation
Differences in measurement values are physical phenomena
resulting from differences in the distances (dimensions) between
current-impression pins and voltage-measurement pins. The
greater the battery terminal resistance in comparison to the
battery's internal resistance, the more marked these differences
become. The following diagram shows how differences in voltage
detected result from differences in distance when measuring a
lead-acid battery.
Model L2020
(Pin distance: 0.65 mm)
Model 9772
(Pin distance: 2.5 mm)
+
−
+
−
Lead-acid battery
Lead-acid battery
Equipotential line
Equipotential line
Potential gradient
Potential gradient
V (voltage detected): A>B
A
B