Martindale Electric BZ701 User manual

BZ701 SOCKET TESTER
InstructIon
Manual

ALWAYS READ THESE INSTRUCTIONS BEFORE
PROCEEDING
Thank you for buying one of our products. For safety and a full
understanding of its benefits please read this manual before use.
Technical support is available from [phone] and
[email protected].

CONTENTS
1 Safety Information 1
1.1 Meaning of Symbols and Markings 2
1.2 Precautions 2
2 Introduction 4
2.1 Inspection 4
2.2 Description 4
3 Operation 4
3.1 Description of Indicators 4
3.2 Buzzer 5
3.3 Using the BZ701 5
3.3.1 Wiring and Voltage Check 6
3.3.2 Polarity Check 8
4 Maintenance 9
4.1 Cleaning 9
4.2 Repair & Service 9
4.3 Storage Conditions 9
5 Warranty 10
6 Specification 12

1. SAFETY INFORMATION
REMEMBER: SAFETY IS NO ACCIDENT
These instructions contain both information and cautions that are
necessary for the correct operation and maintenance of this product.
It is recommended that you read the instructions carefully and ensure
that the contents are fully understood. Failure to understand and to
comply with the warnings and instructions can result in serious injury,
damage or even death.
Particular attention should be paid to the Precautions and Technical
Specification.
If the equipment is used in a manner not specified by Martindale
Electric, the protection provided by the equipment may be impaired.
Please keep these instructions for future reference. Updated
instructions and product information are available at:
www.martindale-electric.co.uk
1

2
1.1 Meaning of Symbols and Markings
Caution - risk of danger and refer to instructions
Caution - risk of electric shock
Equipment protected by double or reinforced insulation
(Class II)
CAT II (Measurement Category II) is applicable to test and
measuring equipment connected directly to utilization points
(socket outlets and similar points) of the
low-voltage MAINS installation. For further information on
measurement categories visit:
www.martindale-electric.co.uk
Equipment complies with relevant EU Directives
Equipment complies with relevant UK Conformity
Assessed marking
End of life disposal of this equipment should be in
accordance with relevant Directives.
1.2 Precautions
This product has been designed with your safety in mind, but
please pay attention to the following warnings and cautions before
use.

3
Warnings
In order to avoid the danger of electrical shock, it is important that
proper safety measures are taken when working with voltages
exceeding the extra low voltage (ELV) limit of 50V AC RMS or
120V DC.
Where applicable other safety measures such as use of protective
gloves, goggles etc. should be employed.
This socket tester must only be used by a skilled and competent
person who is familiar with the relevant regulations, the safety risks
involved and the consequent normal safe working practices, and
under the conditions and for the purposes for which it has been
constructed and specified.
Before each use the socket tester should be examined for damage,
cracks, cuts or scratches. Do not use if damaged in any way.
Make sure the socket tester is dry, clean and free from dust, grease
and moisture while in use to avoid the danger from electric shock
due to surface leakage.
The BZ701 must only be used on CAT II installations up to 300V
to earth.
Always verify the unit is functioning correctly on a known correctly-
wired live socket before and after use.
If none of the indicators illuminate, this does not necessarily mean
the circuit under test is dead. For example the earth and neutral
lines could both be open circuit, or the supply voltage may be
<125V.
Does not detect E-N reversal.

4
Cautions
Avoid severe mechanical shock or vibration and extreme
temperature.
2. INTRODUCTION
2.1 Inspection
Examine the shipping carton for any sign of damage. Inspect the
unit and any accessories for damage. If there is any damage,
consult your distributor immediately.
2.2 Description
The BZ701 is a socket tester that also indicates if the mains voltage
is below 195V or above 270V or if the neutral to earth voltage is
greater than 30V using LEDs and a buzzer.
The BZ701 safely detects Line-Neutral reversal (cross polarity) at
the incoming supply. The polarity swap test detects a serious fault
condition that cannot be identified by normal socket testers on
PME/TN-C-S systems, the most common type of supply. It is easily
activated by using the touch pad.
Correct polarity is indicated by three flashing green LEDs. A fault
condition is clearly indicated by 3 red LEDs and a warning buzzer.
3. OPERATION
3.1. Description of Indicators
The BZ701 uses a row of LED’s to indicate wiring condition and
mains voltage level.
Note: The level of the mains supply is only indicated if the wiring
is correct.

5
Verify the BZ701 in a known correctly wired live socket before and
after use. If any indicators do not illuminate or the buzzer does not
emit a continuous tone, then do not use the BZ701 and return it
for repair.
3.2 Buzzer
Table 1 shows the buzzer response for the various wiring and RCD
test conditions.
Table 1.
Continuous tone Wiring correct
Pulsed tone Faulty wiring
Supply voltage out of tolerance
3.3 Using the BZ701
Plug the BZ701 into the socket to be tested.
Compare the status of the indicators with the front decal or with
figures 1, 2 & 3 in sections 3.3.1 and 3.3.2.
If the BZ701 does not power up and none of the LED’s illuminate
this could mean that the wiring is incorrect, or the mains voltage is
less than 125V and investigation of the wiring is required. In such
circumstances verify the BZ701 in a known correctly wired socket
to confirm the need for investigation.
The BZ701 is designed to be plugged into a socket and removed
after the test has been performed. If the BZ701 is left plugged
into a socket it will go into standby mode after approximately 10
minutes. The illuminated LED indicators will go blank and the centre
LED will flash amber and the buzzer will beep every 5 seconds.
3.3.1 Wiring and Voltage Check
The condition of the wiring at the socket under test or any out of

6
tolerance supply voltage will be indicated by the LED sequences of
figure 1 on the row of LED’s.
The LEDs are labelled N E L to aid fast identification of the source
of common faults. A look up chart on the tester provides further
fault diagnosis. More comprehensive diagnostics are included in
Fig 1 and Fig 2.
Figure 1. Wiring and Voltage Test Indicators
Wiring Correct, Voltage OK
Wiring Correct, Voltage high >270V
Wiring Correct, Voltage low <195V
Earth-Neutral voltage >30V
Open Neutral
Open Earth
Phase (Line) Fault
Phase-Neutral Reversal
Phase-Earth Reversal
Serious wiring fault or voltage <125V
In the event of a fault being indicated, investigation should only be
carried out by a suitably qualified electrician.

7
Figure 2. Possible socket wiring and BZ701 indications when line
(phase) is connected to the socket.
BZ701 Pins
N E L
Socket Under Test Wiring
N E L
E N L
E E L
N N L
OPEN E L
OPEN N L
OPEN L E
OPEN L N
NOPEN L
EOPEN L
LOPEN E
LOPEN N
L E OPEN
L N OPEN
E L OPEN
N L OPEN
L E N
L E E
L N E
L N N
E L L
N L L
N L E
E L E
E L N
N L N
L E L
L N L
OPEN OPEN OPEN
L L L
L L OPEN
LOPEN L
OPEN L L
LOPEN OPEN
OPEN LOPEN
OPEN OPEN L
Does not detect E-N reversal.

8
3.3.2 Incoming Supply Cross Polarity Check
Where the polarity of the incoming mains supply has been reversed
(i.e., Supply Line is connected to Neutral & Earth, Supply neutral
& earth are connected to Line) then, as with all standard socket
testers, BZ701 will not detect this fault, unless the additional Supply
Cross Polarity Check is carried out.
To check for supply cross polarity an additional test is required
which is easily activated by touching the blue POLARITY CHECK
touch pad with a finger.
If the incoming supply wiring polarity is correct, the three LED’s will
flash GREEN and the buzzer indicating correct socket wiring will
continue.
If the wiring polarity is reversed, the wiring LED’s will flash RED
and the buzzer will emit a pulsed tone. The BZ701 will continue to
indicate this fault condition once the finger has been removed from
the touch pad.
In the event of a fault being indicated, investigation should only be
carried out by a suitably qualified electrician.

9
4. MAINTENANCE
4.1 Cleaning
Prior to cleaning, ensure the BZ701 is disconnected from any
live circuits.
If contamination is found, clean with a damp soft cloth and if
necessary a mild detergent or alcohol. Do not use abrasives,
abrasive solvents, or detergents which can cause damage to the
unit. If a mild detergent is used, the unit should subsequently
be thoroughly cleaned with a water dampened soft cloth. After
cleaning, dry and allow to remain in a dry environment for 2 hours
before use.
4.2 Repair & Service
There are no user serviceable parts. Return to Martindale Electric if
faulty. Our service department will quote promptly to repair any fault
that occurs outside the guarantee period.
4.3 Storage Conditions
The BZ701 should be kept in warm dry conditions away from direct
sources of heat or sunlight, and in such a manner as to preserve
their working life. It is strongly advised that they are not kept in a
tool box where other tools may damage them.

10
5. WARRANTY AND LIMITATION OF LIABILITY
This Martindale product is warranted to be free from defects in
material and workmanship under normal use and service. The
warranty period is 2 years and begins on the date of receipt by
the end user. This warranty extends only to the original buyer
or end-user customer, and does not apply to fuses, disposable
batteries, test leads or to any product which, in Martindale’s
opinion, has been misused, altered, neglected, contaminated,
or damaged by accident or abnormal conditions of operation,
handling or storage.
Martindale authorised resellers shall extend this warranty on
new and unused products to end-user customers only but have
no authority to extend a greater or different warranty on behalf
of Martindale.
Martindale’s warranty obligation is limited, at Martindale’s
option, to refund of the purchase price, free of charge repair,
or replacement of a defective product which is returned to
Martindale within the warranty period.
This warranty is the buyer’s sole and exclusive remedy and is
in lieu of all other warranties, expressed or implied, including
but not limited to any implied warranty of merchantability or
fitness for a particular purpose. Martindale shall not be liable
for any special, indirect, incidental or consequential damages or
losses, including loss of data, arising from any cause or theory.
Since some jurisdictions do not allow limitation of the term
of an implied warranty, or exclusion or limitation of incidental
or consequential damages, the limitations and exclusions of
this warranty may not apply to every buyer. If any part of any
provision of this warranty is held invalid or unenforceable by

11
a court or other decision-maker of competent jurisdiction, such
holding will not affect the validity or enforceability of any other
provision or other part of that provision.
Nothing in this statement reduces your statutory rights.

Specification
BZ701
Electrical
Nominal operating voltage: 230V~ ±10%.
Operating frequency: 50Hz
Power consumption: <2.5W
Power: from mains socket under test
Standby: after approx. 10 minutes
Voltage low indication: <195V >125V ± 5%
Voltage high indication: >270V ± 5%
Earth neutral voltage high indication: > 30V nominal
Open earth indication: >35kΩ ± 15%
Supply Polarity: detection of incoming supply cross polarity
General
Dimensions: 65 x 80 x 59mm
Weight: approx. 93g
Environmental
Location: Indoor use only
Altitude: up to 2000m
Operating environment: -10°C to 40°C, at max. 60%RH
Mains supply voltage fluctuations: ± 10%
Overvoltage category: CAT II 300V
Pollution degree: 2
Safety
Conforms to BS EN 61010-1
Class II, Reinforced insulation
EMC: Conforms to BS EN 61326-1
12

•18th Edition Testers
•Accessories
•Calibration Equipment
•Continuity Testers
•Electricians’ Kits
•Environmental Products
•Full Calibration & Repair
Service
•Fuse Finders
•Digital Clamp Meters
•Digital Multimeters
•Labels
•Microwave Leakage
Detectors
•Safe Isolation Kits
•Multifunction Testers
•Non-trip Loop Testers
•Pat Testers & Accessories
•Phase Rotation Testers
•Proving Units
Check out what else you can get from Martindale:
Martindale Electric Co. Ltd. Metrohm House,
12 Imperial Park, Imperial Way, Watford WD24 4PP, UK.
T: [phone] F: [phone]
www.martindale-electric.co.uk [email protected]
Due to policy of continuous development, Martindale Electric reserves
the right to alter equipment specification and description outlined in this
document without prior notice. No part of this document shall be deemed
to be part of any contract for the equipment unless specifically referred to
as an inclusion within such contract. © 2022 Martindale Electric Co. Ltd.
Registered in England No. 3387451. LITBZ701
Ver. C1.6