5.8 Phase Sequence Verification
1. Connect the red test lead to the “c” terminal, black
test lead to “b” terminal and yellow test lead to “a”
terminal
2. Set the multifunction selector to “600V~/abc”
range.
3. Connect yellow/black/red test lead to three-phase
contact point, If the phase sequence indicator
lights on, indicating the connection is in correct
phase sequence.
4. If the phase sequence indicator lights off, please
swap black (b) and red (c) test leads, if the
indicator remains off which means that there is a
missing phase or wrong connection, please use
Live Wire Verification function to verify each phase
again.
5.9 Live Wire Verification
(BS1901/1W)
1. Connect the red test lead to the “ ” terminal, black test lead to “COM” terminal and hold
the black test lead (please note:
do not touch the test pin and keep your hands away
from the finger guard of the test lead!
)
2. Set the multifunction selector to “600V~/abc” range.
3. Use the red test lead to contact the live wire to be tested. When there is a live wire, the
Live Wire Verification lights will turn on.
5.10 Continuity test
1. Connect the black test lead to the “COM” terminal and red test lead to the “ ” terminal.
2. Set the multifunction selector to (same as
) position.
3. Connect the test leads across the circuit to be tested, if the resistance less than 30
Ω,
buzzer will be activated.
!
CAUTION: Max. input overload: 250V rms < 20sec.
5.11 Battery test
(BS1901/01W)
1. Connect the black test lead to the “COM”
terminal and red test lead to the “batt.”
terminal.
2. Set the multifunction selector to battery
“1.5V or 12V” range
3. To measure the battery voltage without
loading (V
1
), connect the test leads to
the battery, red test lead to the battery
cathode (+), back test lead to the battery
anode (-). If the display shows ‘
−
’ which
means the red test lead is connected to
the anode (-).
4. To measure the battery voltage with
loading (V
2
), press the “HOLD/batt.” key.
The meter presets the internal loading R
0
=900
Ω
for 12V and R
0
=150
Ω
for 1.5V.
5. To find the internal impedance (R
i
) of the battery, the following formula can be used.
R
i
=
Voltage without loading - Voltage with loading
Internal loading
=
(V
1
- V
2
)×R
0
V
2
For example: V
1
=1.550V; V
2
=1.450V; R
0
=150
Ω
for 1.5V battery measurement
5.12 Square waveform output
(BS1901W)
1) Connect the black test lead to the “COM” socket and red test lead to the “
mA
” socket.
2) Set the function selector to “
OUT
“position.
3) connect test leads across device under test.
5.13 Measuring AC current with an add-on clamp
(optional)
1. Connect an add-on clamp anode (-) to “COM”
terminal and cathode (+) to
terminal
2. Clamp the tested wire with the clamp head and the
AC current value will be shown on the display.
6. MAINTENANCE
CAUTION
BEFORE ATTEMPTING BATTERY REMOVAL OR REPLACEMENT, DISCONNECT
TEST LEADS OR PROBES FROM ANY ENERGISED CIRCUITS TO AVOID SHOCK
HAZARD.
6.1 Fitting and replacing the battery
1. Ensure that the instrument is not connected to any external circuit, set the Multifunction
selector to OFF position and remove the test leads from the terminals.
2. Remove the screw of the battery compartment on the bottom of the back case.
3. Replace the spent battery with the same type and rating.
4. Reinstate the battery compartment, tighten and securing screw.
6.2 Cleaning
Periodically wipe the case with a soft damp cloth and mild household cleanser. Do not use
abrasives or solvents. Ensure that no water gets inside the equipment to prevent possible
shorts and damage.
7. ACCESSORIES
The accessories contained inside the packaging are the following:
Pair of test leads
English instruction manual
3 Phases 3rd test lead with clip
K-Type Thermocouple (for BS1903 only)
10A Current Adaptor (for BS1903 only)
1.5V AAA battery x 3
Certificate of test
Optional: 10A DC current Adaptor 3700- 10A
AC current add-on clamp BS- 06
8. SERVICE
8.1 Warranty Conditions
This meter is guaranteed against any material fault or manufacturer’s defect, in accordance
with the general conditions of sale. During the warranty period (one year), faulty parts may be
replaced, with the manufacturer reserving the right to decide either to repair or replace the
product.
In the event of returning the meter to the after-sales service or to a regional branch, the
outward transport is payable by the customer. The delivery must be agreed in advance with
consignee.
For delivery indicate, by means of an enclosed note, as clear as possible, the reasons for
returning it. Use only the original packing.
Any damage caused by shipment using NOT the original packaging will be charged in any
case to the consignor.
The manufacturer will not be responsible for any damage to persons or things.
The warranty does not apply to the following cases:
Accessories and battery are not included in warranty.
Repairs following unsuitable use of the meter or by combining the latter with incompatible
meter or accessories.
Repairs resulting from incorrect shipping.
Repairs resulting from servicing carried out by a person not approved by the company.
Modifications to the meter without explicit authorisation from our technical department.
Adaptation to a particular application not provided for by the definition of the meter or by
the instruction manual.
The contents of this manual may not be reproduced in any form whatsoever without the
manufacturer’s authorization.
Our products are patented. The logotypes are registered. We reserve the right to
modify specifications and prices as part of technological developments which might
be necessary.
8.2 Service
If the meter should not work properly, before contacting the DEALER OR THE SERVICE
CENTRE, check the battery condition, the test leads, etc., Change them if necessary.
If the meter still does not work, check if your operating procedure agrees with the description
in this manual.
In the event of returning the meter, it must be re-sent to the after-sales service (at address or
to a regional branch), the outward transport is payable by the customer. The delivery must be
agreed in advance with consignee.
For delivery indicate the reasons for returning it. (By means of an enclosed note, as clear as
possible). Use only the original packing.
Any damage caused by delivery with NO original packaging will be charged in any case to the
consignor.
FOR TECHNICAL ASSISTANCE,
PLEASE CONTACT:
R
i
=
(1.550 – 1.450)×150
≈
10.34
Ω
1.450
1901/1901W/1902/1903
REV1/DEC 06
!
Remarks: Due to our policy of continual product development, we reserve the
right to amend the specifications of the mentioned products without notice.
