CEM DT-9130 User manual

OPERATING INSTRUCTION
VOLTAGE TESTER
L2L1
TEST
AUTO

1
Safety
International Safety Symbols
Warning of a potential danger, comply with
instruction manual.
Caution! Dangerous voltage. Danger of
electrical shock.
Double insulation.
SAFETY NOTES
Reference. Please use utmost attention.
Do not exceed the maximum allowable input
range of any function
Insulated personnel body protective equipment
up to 690V.
WARNINGS
In order to avoid electrical shock, the valid safety
and VDE regulations regarding excessive contact
voltages must receive utmost attention, when
working with voltages exceeding 120V (60V) DC or

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50V (25V) rms AC. The values in brackets are valid
forlimited ranges (as for example medicine and
agriculture).
Prior to measurement ensure that the test leads
and the test instrument are in perfect condition.
When using this instrument only the handles of
the probes may be touched – do not touch the
probe tips.
This instrument may only be used within the
ranges specified and within low voltage systems up
to 690V.
Prior to usage ensure perfect instrument function
(e.g. on known voltage source).
The voltage testers may no longer be used if one or
several functions fail or if no functionality is
indicated.
Do not use this instrument under damp conditions.
Perfect display I sonly guaranteed within a
temperature range of -10℃up to +55℃, at relative
humidity question <85%.
If the operator’s safety cannot be guaranteed, the
instrument must be removed from service and

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protected against use.
The safety can no longer be insured if the
instrument:
Shows obvious damage
does not carry out the desired measurements
has been stored for too long under unfavorable
conditions
has been subjected to mechanical stress
during transport.
All relevant statutory regulations must be adhered to
when using this instrument.
Appropriate Usage
The instrument may only be used under those
conditions and for those purposes for which it was
conceived. For this reason, in particular the safety
references, the technical data including
environmental conditions and the usage in dry
environments must be followed.
When modifying or changing the instrument, the
operational safety is no longer ensured.
The instrument may only be opened by an

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authorized service technician, e.g. for repair.
Specifications
LCD display 1999 counts (3 1/2 digit ) LCD
display with bargraph & backlight
Voltage range 6,12, 24, 50, 120, 230, 400,
690V AC/DC
Resolution
1V AC/DC
Tolerances
DCV: +1.0% of reading
+3 digit
ACV: +1.5% of reading
+5 digit
69
0VAC Max.
measuring
current
approx. ≤3.0mA
690VDC Max.
measuring
current
approx. ≤2.5mA
Voltage detection: automatic
Polarity detection: full range
Range detection: automatic
Response time: Updates 2~3 / sec.

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ACV Frequency
range:
50/60Hz
Internal impedance: approx. ≤1MΩ
Operation time Long
LCD on: >4. 5V AC/DC
Single-pole Phase
Test:
Voltage range: 100…690V AC
ACV Frequency
range:
50/60Hz
Continuity Test
Resistance range: <300kΩ
Test current: <5μA
Overvoltage
protection:
690V AC/DC
Rotary Field
Indication
Voltage range
(LEDs):
100…400V
Frequency range: 50/60Hz
Measurement
principle:
double-
pole and contact
electrode

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Self-check test Auto
Operation time 5s<250V
AC/DC, Is< =
0.2A(690V)/30s max.
Overvoltage
protection:
3s<400V AC/690V DC
Power supply 2x1.5V “AAA” Batteries
Temperature range: -10℃up to +55℃
Humidity: max.85% relative humidity
Overvoltage class: CATIII -1000V
age Tester Description:
1. Handle test probe – (L1)
2. Instrument test probe + (L2)
3. measurement point illumination
4. 2000 Counts LCD display
5. LED for “ ! ” warning voltage
mode display
6. LED for single-pole phase test
7. LED for continuity
8. AUTOTEST(self-check test)
9. Measurement point lighting Button
10. Battery case

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Explanations of Symbols
The voltage tester shows the following symbols:
Inserting/Changing the Batteries
The voltage tester is operated with two
micro-batteries (type AAA, in the scope of delivery).
Proceed as follows to insert or change the batteries:
• Loosen the screw on the battery compartment
DC DC voltage
AC AC voltage
DC voltage negative potential (DC)
Phase display from 100 to 690V ~ 50/60Hz
when used as a „single-pole“ phase tester.
Continuity test symbol
Rotating field display clockwise
Rotating field display anticlockwise
Device for work to be performed with voltage
present
Battery replacement symbol

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lid (9) with a suitable screwdriver
and remove it.
• Insert two micro-batteries (AAA)
into the
battery compartment. Observe
the polarity
information in the battery compartment.
If possible, use alkaline batteries.They guarantee a
longer service life.
• Then, carefully close and screw down the battery
compartment lid again. The batteries need to be
changed if the „Low Bat “symbol lights up on
the LCD display or when the LCD display stays dark
after contacting both test tips.
The voltage tester will show no reading if
the batteries are flat. The device must not be
operated with flat batteries or without batteries.
To prevent damage to the device from leaking
batteries, remove the batteries from the device if
you will not be using it for a longer period. For the

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same reason, we recommend that you remove flat
batteries immediately.
Function test / Self test:
Test the voltage tester on a known source.
Warning: To avoid electric shock, disconnect
the test leads from any source of voltage
before turn on the self-check test function.
The “!” LED will light on when there is a
voltage over 50V, even if the battery is low or
if the battery has been removed.
When press “Autotest” button, all the
bargraph will must be light on, and LCD
display “000” ,and The continuity test’s LED
(6) will light on, buzzer sound. This shows
the tester self-test was done.
Measuring Point Lighting
The voltage tester has a battery-operated
measuring point lamp. Press button (8) to switch
this lamp on. The lamp stays on
as long as this button is kept pressed. When the
button is released, the lamp goes off.

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Carrying out Measurements
The twin-pole voltage tester has two handles, a
connecting cable and an LCD display. Always hold
the voltage tester in such a way that you get a
vertical view of the display. Strong incidence of light
may have an adverse effect on the display. For DC
measurements, test tip is the positive pole, and the
test tip is the negative pole.
Before each voltage measurement, check
that the device is working properly by measuring a
known voltage source. If the tester’s LCD display
remains blank, take the voltage tester out of
operation. A defective voltage tester must not be
used. Do not operate the device with flat batteries or
without batteries. Observe the regulations regarding
work with electrical systems.
The device can be used for the following types
of measurement:

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Voltage measurement with high internal
impedance
Always hold the voltage tester by the handles
designed for this purpose. Never touch the device
beyond the handle ends. Hold the two test tips onto
the measuring points to be tested. The voltage
tester switches on automatically with voltages
higher than 4.5V AC/DC. The voltage measured is
shown on the LCD display. If the measured voltage
falls below 4.5 V AC/DC, the voltage tester switches
off automatically.The LCD display shows the
voltage values numerically and in the form of a
bargraph. The type of voltage (alternating current =
AC or direct voltage = DC) and the polarity are also
shown on the LCD display. In the event of negative
DC voltage, the numeric voltage value is preceded
by „ - „. Positive DC voltage is shown without a
positive sign preceding the value.
Thanks to the input impedance of approx.
1MΩ, it is possible to perform voltage tests with high

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input impedances without time restrictions.
The voltage tester also indicates a rotating direction
(L or R) with measurements on single-phase mains
(L1 against N). This is not a device malfunction.
Rotating field direction display
The voltage tester can show the direction of the
rotating field with three-phase systems. Hold the
voltage tester by the handles and provided. Never
touch the device beyond the handle ends. Hold the
two test tips onto the measuring points to be tested.
Test tip corresponds to L1, and test tip corresponds
to L2. The applied voltage and the rotating field
direction is shown on the LCD display The rotating
field symbols (D) show the corresponding rotating
field direction (L = anticlockwise / R = clockwise).
Continuity check
The voltage tester can also be used as a continuity
tester. Always hold the voltage tester by the handles
designed for this purpose. Never touch the device
beyond the handle ends. The continuity tester

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switches itself on automatically when the test starts,
and switches itself back off when the test has been
completed. Check for correct functioning before
beginning the test. If you connect the two test tips
with each other, you should heap a beep, and the
continuity LED should light up. If this is not the case,
replace the batteries as described under
„Inserting/Changing the Batteries“. The continuity
tester indicates resistances of up to<300 kOhm.
Using the Voltage tester as a ”
single-pole” phase tester
The Voltage tester can also be used as a
„single-pole“ phase tester. Always hold the voltage
tester by the handles designed for this purpose (3
and 6). Never touch the device beyond the handle
ends.
This “phase test” serves as a quick test only.
Please check again for zero potential with the
twin-pole measuring method before you do any

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work on this circuit. Observe the regulations
regarding work with electrical systems.
Before beginning the test, check the condition of the
batteries by connecting the two test tips with each
other.
Check for correct functioning at a known alternating
voltage source. Contact test tip “
”L2” with the measuring point to be tested. In the
event of the phase (alternating current between 100
and 690V), the lightening symbol LED lights up.
The „single-pole“ phase display can be
adversely affected by unfavourable ambient
conditions (electrostatic fields, good insulation etc.).
In all cases, conduct an additional,
twin-pole voltage test.
Maintenance and Disposal
Check the technical safety of the voltage tester

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regularly. It can be assumed that risk-free operation
is no longer possible if:
• there is visible evidence that the device has been
damaged
• the device has been stored under unfavorable
conditions for a longer period of time
• the device has been subjected to heavy transport
strain.
The outside of the device should be cleaned with a
soft, damp cloth or brush only. Do not use abrasive
or chemical cleaning agents which could damage
the housing or impair operation.
Never try to open the housing, apart from the
battery
compartment.
When the device has become unusable,
dispose of it in accordance with the current statutory
regulations.
Disposal of batteries and rechargeable

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batteries
You, as the end user, are required by law (Battery
Ordinance) to return all used batteries/rechargeable
batteries. Disposing of them in the household waste
is prohibited!
Batteries/rechargeable batteries
containing hazardous substances are marked by
the shown symbols. These symbols also indicate
that it is prohibited to dispose of them in the
household waste. The heavy metals concerned are:
Cd = cadmium, Hg = mercury, Pb = lead. You can
return flat batteries/rechargeable batteries free of
charge to the collection points in your community,
our branches or anywhere else where batteries are
sold.
You thus fulfil your statutory obligations and help to
protect the environment!