3.15 Diode Testing
If the diode to be tested is in circuit, be sure the circuit power is
switched off.
Connect the black test lead to the
COM
terminal and the red test
lead to the
terminal.
Set the rotary switch to the
:
position. The LCD will
display
SMART
.
Taking all necessary safety precautions connect the test leads to
the diode being tested.
The smart function will automatically detect if a diode is present at
the terminals.
If the diode is good a forward bias will give a display reading of
around 0.6 V (silicon diode) and a reverse bias will give a display
of
OL
. If the diode is shorted or open circuit the display will indicate
approx. 0V or
OL
respectively for both forward and reverse bias.
3.16 Use as a Non-contact Voltage Detector
Non-contact voltage detector testing is not suitable to
determine if a circuit is
not
hazardous live. A double pole
voltage test should always be used for that purpose.
Before and after each use, the non-contact voltage detector func-
tion must be proven using a suitable proving device or a known
good voltage source.
Do not use
if the unit fails to operate correct-
ly during proving.
Set the rotary switch to the
NCV
position. The LCD will display
EF
.
11
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Position the area of the clamp jaw marked
NCV
between the
marks toward the conductor to be tested for the presence of a live
voltage.
As the source of a live voltage is approached the buzzer will sound
intermittently and “-” will be displayed on the LCD.
Depending on the voltage level, the closer the proximity of the unit
to the voltage source, the more rapidly the buzzer sounds, until it
become continuous. The display will change from “-” to “- - - -” one
step at a time.
4. MAINTENANCE
4.1 Battery Replacement
To avoid shock or injury, disconnect the clamp meter from
any external circuits and remove the test leads before
proceeding.
Referring to figure 2, the battery compartment is underneath the
unit and can be accessed by removing the screw and lifting off the
cover.
12
Figure 2
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13
Fit 2 new 1.5V, AAA alkaline batteries (IEC LR03, NEDA 24A)
observing correct polarity.
Replace the battery compartment cover and screw.
Note:
Do not mix old and new batteries.
4.2 Test Lead Replacement
If the test leads become damaged they should be replaced.
The replacement test leads must have the same (or better)
overvoltage category rating as the TL16 test leads supplied.
4.3 Calibration
To maintain the integrity of measurements made using your
instrument, Martindale Electric recommends that it is returned
at least once a year to an approved Calibration Laboratory for
recalibration and certification.
Martindale Electric is pleased to offer you this service.
Please contact our Service Department for details.
Email: [email protected]
Tel: 01923 650660
4.4 Cleaning
To reduce the risk of surface leakage, this instrument must be
kept in a clean condition.
Prior to cleaning, ensure that the instrument is disconnected
from any voltage source.
If contamination is found, clean with a damp soft cloth and if
necessary a mild detergent or alcohol. Do not use abrasives,
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14
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.
4.5 Repair & Service
There are no user serviceable parts in this unit other than those that
may be described in section 4. Return to Martindale Electric if faulty.
Our service department will quote promptly to repair any fault that
occurs outside the guarantee period.
Before the unit is returned, please ensure that you have checked the
unit, batteries, leads and for poor connections.
4.6 Storage Conditions
The instrument should be kept in warm dry conditions away from
direct sources of heat or sunlight, and in such a manner as to
preserve the working life of the unit. It is strongly advised that the
unit is not kept in a tool box where other tools may damage it.
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