Greenlee CMT-80 User manual

52020572 © 2005 Greenlee Textron Inc. 3/05
CMT-80
Clamp-on Meter
INSTRUCTION MANUAL
INSTRUCTION MANUAL
Read and understand all of the instructions and
safety information in this manual before
operating or servicing this tool.
English .......... 1–14
Français ....... 15–28
Italiano......... 29–42
Deutsch ........ 43–56
Español ........ 57–70
Português...... 71–84
Nederlands .... 85–97

2
Description
The Greenlee CMT-80 Digital Clamp-on Meter is a hand-held testing device
with the following measurement capabilities: AC and DC voltage, AC current,
and resistance. It also verifies continuity.
This unit has data hold capability. It automatically determines measurement
function based on input.
Safety
Safety is essential in the use and maintenance of Greenlee tools and
equipment. This instruction manual and any markings on the tool provide
information for avoiding hazards and unsafe practices related to the use of
this tool. Observe all of the safety information provided.
Purpose of This Manual
This instruction manual is intended to familiarize all personnel with the safe
operation and maintenance procedures for the Greenlee CMT-80 Digital
Clamp-on Meter.
Keep this manual available to all personnel.
Replacement manuals are available upon request at no charge.
KEEP THIS MANUAL
All specifications are nominal and may change as design improvements occur.
Greenlee Textron Inc. shall not be liable for damages resulting from misapplication or
misuse of its products.

3
CMT-80
Important Safety Information
This symbol is used to call your attention to hazards or unsafe
practices which could result in an injury or property damage. The
signal word, defined below, indicates the severity of the hazard. The
message after the signal word provides information for preventing or
avoiding the hazard.
SAFETY ALERT SYMBOL
Immediate hazards which, if not avoided, WILL result in severe injury
or death.
Hazards which, if not avoided, COULD result in severe injury or death.
Hazards or unsafe practices which, if not avoided, MAY result in injury
or property damage.
Read and understand this material before
operating or servicing this equipment. Failure to
understand how to safely operate this tool can
result in an accident causing serious injury or
death.

4
Important Safety Information
Electric shock hazard:
Contact with live circuits can result in severe
injury or death.
Electric shock hazard:
•Do not apply more than the rated voltage between any two input
terminals, or between any input terminal and earth ground.
•Do not contact the test lead tips or any uninsulated portion of the
accessory.
Failure to observe these warnings can result in severe injury or death.
Electric shock and fire hazard:
•Do not expose this unit to rain or moisture.
•Do not use the unit if it is wet or damaged.
•Use test leads or accessories that are appropriate for the applica-
tion. Refer to the category and voltage rating of the test lead or
accessory.
•Inspect the test leads or accessory before use. They must be clean
and dry, and the insulation must be in good condition.
•Use this unit for the manufacturer’s intended purpose only, as
described in this manual. Any other use can impair the protection
provided by the unit.
Failure to observe these warnings can result in severe injury or death.

5
CMT-80
Important Safety Information
•Do not attempt to repair this unit. It contains no user-serviceable
parts.
•Do not expose the unit to extremes in temperature or high humidity.
Refer to “Specifications.”
•Do not connect to voltage for longer than 30 seconds.
Failure to observe these precautions can result in injury and can
damage the unit.
•Do not operate with the case or battery cover open.
•Before removing the case or battery cover, remove the test leads
(or jaw) from the circuit and shut off the unit.
Failure to observe these warnings can result in severe injury or death.
•Unless measuring voltage or current, shut off and lock out power.
Make sure that all capacitors are discharged. Voltage must not be
present.
•Using this unit near equipment that generates electromagnetic
interference can result in unstable or inaccurate readings.
Do not use the meter to measure voltages in circuits that could be
damaged by the meter’s low input impedance (approximately 4 kΩ).

6
Identification
1. Jaw
2. Lever
3. Display
4. Common (COM) input terminal
5. Volts or resistance (V-Ω) input terminal
6. ON/OFF/HOLD button
Display Icons
7. Low battery indicator
8. DC measurement is selected
9. –Polarity indicator
10. AC measurement is selected
11. Automatic selection is active
12. OL Overload indicator
13. Continuity
14. Hold function is enabled
15. VVoltage
16. AAmperes
17. Ohms
18. Lo Zi Low input impedance is active
1
2
3
4 5
6
2
7
8
9
1
0
11
14
1
5
–
1
6
17
1
8
12
1
3
Symbols on the Unit
Warning—Read the instruction manual
Double insulation
Battery

7
CMT-80
Operation
2. Refer to “Typical Measurements” for specific measurement instructions.
3. Test the unit on a known functioning circuit or component of the type you
intend to measure.
•If the unit does not function as expected on a known functioning
circuit, replace the battery.
•If the unit still does not function as expected, send the unit to Greenlee
for repair. Refer to the instructions under the Warranty.
4. Take the reading from the circuit or component to be tested.
Note: Momentarily press the ON/OFF/HOLD button to hold the present
measurement on the display; momentarily press again to return to the normal
display mode. Press and hold to turn the unit off.
Priority Display Conditions
AC volts or Input at terminals is
1DC volts, 1.3 to 600 VAC
whichever 1.8 to 600 VDC
is greater –0.6 to –600 VDC
Input at terminals is
Resistance 0 to ∞Ω
2and 0 to 0.9 VAC
continuity 0.2 to 1.4 VDC
–0.02 to –0.2 VDC
3AC amps AC current through jaw is
0.6 to 400 A
Electric shock hazard:
Contact with live circuits can result in severe
injury or death.
1. The meter automatically selects the proper measurement according to
the following table.

8
Typical Measurements
Current Measurement—
Clamp Around Wire
Notes:
•Clamp the jaw around one conductor only.
•Close the jaw completely to ensure
accurate measurement.
•Center the wire in the jaw for highest
accuracy.
Current Measurement—
Clamp Around Line Splitter
Notes:
•The Greenlee 93-30 Line Splitter is divided.
One section renders amps; the other
renders amps multiplied by 10.
•Close the jaw completely to ensure
accurate measurement.
•Center the line splitter in the jaw for highest
accuracy.

9
CMT-80
Typical Measurements
Voltage Measurement
Resistance
Measurement
Continuity Check

10
Accuracy
Refer to “Specifications” for operating conditions and temperature coefficient.
Accuracy is specified as follows: ±(a percentage of the reading + a fixed
amount) at 23 °C ±5 °C (73.4 °F ±9 °F), 0% to 80% relative humidity.
Accuracy Table
Characteristic Range Accuracy Frequency
Range
AC Current 0.6 to 50.0 A ±(1.8% + 0.6 A) 50 to 60 Hz
50.0 to 400.0 A ±(1.8% + 0.3 A)
AC Voltage* 1.3 to 600.0 V ±(1.5% + 0.3 V) 50 to 500 Hz
DC Voltage* 1.8 to 600.0 V ±(1.0% + 0.2 V) N/A
–0.6 to –600.0 V ±(1.0% + 0.4 V)
Resistance** 0.1 to 99.9 Ω±(2% + 1.0 Ω)N/A
100 to 2000 Ω±(2% + 2 Ω)†
*Input impedance: 4 kΩnominal at voltages up to 30 V;
increases with voltage to approximately 600 kΩat 600 V
**Open circuit voltage: 1.5 V maximum
†Multiply temperature coefficient times 1.5 when operating temperature
is above 40 °C.
Continuity
Tone on: Circuit resistance is ≤25 Ω(approximately).
Tone off: Circuit resistance is ≥400 Ω(approximately).

11
CMT-80
Specifications
Display: 6000-count LCD
Maximum Conductor Size: 27 mm (1.06")
Display update rate is 4 per second for voltage, 2 per second for resistance,
and 1 per second for current
Duty Cycle (voltage above 30 V):
30 seconds ON (maximum)
2 minutes OFF (minimum)
Automatic Power Off: After approximately 30 minutes
Temperature Coefficient: 0.2 x (Accuracy) per °C below 18 °C or above 28 °C
Measurement Categories:
V-ΩTerminal: Category III, 600 VAC and 600 VDC
COM Terminal: Category III, 600 VAC and 600 VDC
Jaws: Category III, 600 VAC and 600 VDC
Operating Conditions:
Temperature:
0 °C to 30 °C (32 °F to 86 °F), 0% to 80% relative humidity
30 °C to 40 °C (86 °F to 104 °F), 0% to 75% relative humidity
40 °C to 50 °C (104 °F to 122 °F), 0% to 45% relative humidity
Altitude: 2000 m (6500') maximum
Indoor use only
Storage Conditions: –20 °C to 60 °C (–4 °F to 140 °F),
0% to 80% relative humidity
Remove battery
Pollution Degree: 2
Battery: 9 V battery (NEDA 1604, JIS 006P or IEC 6F22)
Battery Life: Approximately 250 hours with alkaline battery

12
Measurement Categories
These definitions were derived from the international safety standard for
insulation coordination as it applies to measurement, control, and laboratory
equipment. These measurement categories are explained in more detail by the
International Electrotechnical Commission; refer to either of their
publications: IEC 61010-1 or IEC 60664.
Measurement Category I
Signal level. Electronic and telecommunication equipment, or parts thereof.
Some examples include transient-protected electronic circuits inside
photocopiers and modems.
Measurement Category II
Local level. Appliances, portable equipment, and the circuits they are plugged
into. Some examples include light fixtures, televisions, and long branch
circuits.
Measurement Category III
Distribution level. Permanently installed machines and the circuits they are
hard-wired to. Some examples include conveyor systems and the main circuit
breaker panels of a building’s electrical system.
Measurement Category IV
Primary supply level. Overhead lines and other cable systems. Some
examples include cables, meters, transformers, and other exterior equipment
owned by the power utility.

13
CMT-80
Maintenance
1. Disconnect the unit from the circuit.
2. Remove the screws from the battery cover.
3. Remove the battery cover.
4. Replace the battery. Observe polarity.
5. Replace the cover and screws.
Cleaning
Periodically wipe the case with a damp cloth and mild detergent; do not use
abrasives or solvents.
•Do not attempt to repair this unit. It contains no user-serviceable
parts.
•Do not expose the unit to extremes in temperature or high humidity.
Refer to “Specifications.”
Failure to observe these precautions can result in injury and can
damage the unit.
Battery Replacement
Before removing the battery cover, remove the test leads (or jaw) from
the circuit and shut off the unit.
Failure to observe this warning can result in severe injury or death.

14
Lifetime Limited Warranty
Greenlee Textron Inc. warrants to the original purchaser of these goods
for use that these products will be free from defects in workmanship and
material for their useful life, excepting normal wear and abuse. This
warranty is subject to the same terms and conditions contained in
Greenlee Textron Inc.’s standard one-year limited warranty.

52020572 © 2005 Greenlee Textron Inc. 3/05
CMT-80
Compteur à pinces
INSTRUCTION MANUAL
MANUEL D’INSTRUCTIONS
Lire attentivement et bien comprendre toutes les
instructions et les informations sur la sécurité de
ce manuel avant d‘utiliser ou de procéder à
l‘entretien de cet outil.

16
Description
Le compteur à pinces CMT-80 de Greenlee est un appareil portable conçu
pour mesurer la tension c.a. et c.c., le courant c.a. et la résistance. Il vérifie
également la continuité.
Cet appareil peut garder des mesures. Il détermine automatiquement la
fonction de mesure à partir des entrées.
Sécurité
Lors de l’utilisation et de l’entretien des outils et des équipements de
Greenlee, votre sécurité est une priorité. Ce manuel d’instructions et toute
étiquette sur l’outil fournit des informations permettant d’éviter des dangers
ou des manipulations dangereuses liées à l’utilisation de cet outil. Suivre
toutes les consignes de sécurité indiquées.
Dessein
Ce manuel d’instructions est conçu pour que le personnel puisse se
familiariser avec le fonctionnement et les procédures d’entretien sûres
du compteur à pinces CMT-80 de Greenlee.
Mettre ce manuel à la disposition de tous les employés.
On peut obtenir des exemplaires gratuits sur simple demande.
CONSERVER CE MANUEL
Toutes les spécifications sont nominales et peuvent changer avec l’amélioration de la
conception. Greenlee Textron Inc. ne peut être tenue responsable des dommages résultant
d’une application inappropriée ou d’un mauvais usage de ses produits.

CMT-80
17
Consignes de sécurité importantes
Ce symbole met en garde contre les risques et les manipulations
dangereuses pouvant entraîner des blessures ou l’endommagement
du matériel. Le mot indicateur, défini ci-dessous, indique la gravité du
danger. Le message qui suit le mot indicateur indique comment
empêcher le danger.
SYMBOLE
D’AVERTISSEMENT
Danger immédiat qui, s’il n’est pas pris en considération
ENTRAINERA des blessures graves, voire mortelles.
Danger qui, s’il n’est pas pris en considération, POURRAIT entraîner
des blessures graves, voire mortelles.
Dangers ou manipulations dangereuses qui, s’ils ne sont pas pris en
considération, POURRAIENT EVENTUELLEMENT entraîner des
dommages à la propriété ou causer des blessures.
Lire attentivement et bien comprendre cette
documentation avant d’utiliser ou de procéder
à l’entretien de cet équipement. Négliger de
comprendre comment utiliser cet outil en toute
sécurité peut provoquer un accident et entraîner
des blessures graves, voire mortelles.

18
Consignes de sécurité importantes
Risques de décharge électrique :
•Ne pas appliquer plus que la tension nominale entre deux bornes
d’entrée, ou entre une borne d’entrée et une prise de terre.
•Ne pas entrer en contact avec les extrémités des fils d’essai ou avec
toute autre partie non isolée de l’accessoire.
L’inobservation de ces consignes peut entraîner des blessures graves,
voire mortelles.
Risques de décharge électrique et d’incendie :
•Ne pas exposer cet appareil à la pluie ou à l’humidité.
•Ne pas utiliser cet appareil s’il est mouillé ou endommagé.
•Utiliser des fils d’essai ou des accessoires conformes à
l’application. Se reporter à la catégorie et la tension nominale du fil
d’essai ou de l’accessoire.
•Vérifier les fils d’essai ou l’accessoire avant de les utiliser. La pièce
(ou les pièces) doi(ven)t être propre(s) et sèche(s) et l’isolation en
bon état.
•Utiliser cet appareil uniquement dans le but pour lequel il a été
conçu, tel que décrit dans ce manuel. Toute autre utilisation peut
altérer le système de protection de cet appareil.
L’inobservation de ces consignes peut entraîner des blessures graves,
voire mortelles.
Risques de décharge électrique :
Un contact avec des circuits sous tension peut
entraîner des blessures graves, voire mortelles.

CMT-80
19
Consignes de sécurité importantes
Ne pas utiliser le contrôleur pour mesurer des tensions dans des
circuits pouvant être endommagés par la faible impédance d’entrée du
contrôleur (environ 4 kΩ).
•Ne pas tenter de réparer cet appareil. Il ne comporte aucune pièce
pouvant être réparée.
•Ne pas exposer l’appareil à des températures ou à une humidité
extrêmes. Se reporter à la section des « Spécifications ».
•Ne pas connecter à de la tension pendant plus de 30 secondes.
L’inobservation de ces consignes peut endommager l’appareil et
entraîner des blessures.
•Ne pas utiliser lorsque la pile ou le boîtier est ouvert.
•Avant d’enlever le boîtier ou la pile, retirer les fils d’essai (ou la
pince) du circuit et mettre l’appareil hors tension.
L’inobservation de ces consignes peut entraîner des blessures graves,
voire mortelles.
•Sauf si l’on mesure la tension ou le courant, mettre hors tension
et verrouiller la source d’alimentation. S’assurer que tous les
condensateurs sont déchargés. Aucune tension ne doit être présente.
•L’utilisation de cet appareil à proximité d’équipements qui génèrent
des interférences électromagnétiques peut produire des lectures
instables ou erronées.

20
Identification
1. Pince
2. Levier
3. Afficheur
4. Borne d’entrée commune (COM)
5. Borne d’entrée de volts ou de
résistance (V-Ω)
6. Bouton de mise sous/hors
tension/garde (ON/OFF/HOLD)
Icônes de l’afficheur
7. Indicateur de pile faible
8. Mesure du c.c. sélectionnée
9. –Indicateur de polarité
10. Mesure du c.a. sélectionnée
11. Sélection automatique activée
12. OL Indicateur de surcharge
13. Continuité
14. Fonction de maintien activée.
15. VTension
16. AAmpères
17. Ohms
18. Lo Zi Faible impédance d’entrée activée
1
2
3
4 5
6
2
7
8
9
1
0
11
14
1
5
–
1
6
17
1
8
12
1
3
Symboles apparaissant sur l’appareil
Avertissement — Lire le manuel d’instructions
Isolation double
Pile