Isotech ICM A7 User manual

ISO-TECH ICM A7
ELECTRICAL TESTER
INSTRUCTION MANUAL

INTRODUCTION
1-1 Unpacking and Inspection
Upon removing the A7 open jaw clamp meter from its packing, you should have the following items :
1. A7 open Jaw Clamp meter.
2. Instruction manual.
1-2 SAFETY
Review the following safety precautions to avoid injury and prevent damage to this product or any products
Connected to it. To avoid potential hazards, use the product only as specified.
#CAUTION. These statements identify conditions or practices that could result in damage to the equipment or
other property.
#WARNING. These statements identify conditions or practices that could result in personal injury or loss of life.
Symbols on the product
#Refer to manual 1Double Insulated □Battery
Specific precautions

1. To avoid personal injury, do not apply any voltage or current to the product without the covers in place.
2. To avoid injury or loss of life, do not touch the metal probe tips while they are connected to a voltage source,
probe tip sleeves are supplied.
3. To avoid electric shock, do not operate this product in high temperature or high humidity environment.
4. Do not use the tester if it or its test leads appear damaged, or if you suspect that the tester is not operating
properly.
5. Never apply more than the rated voltage, as marked on the tester, between a terminal and earth ground.
1-3 FRONT PANEL OVERVIEW

Refer to figure 1 and the following numbered steps to familiarize yourself with the meter’s front panel controls and
connectors.
1. Digital Display — The liquid crystal display (LCD) is a 3 1/2 digit display (maximum reading of 1999), with
autopolarity and decimal point indicators.
2. Measurement Function Dial — Rotate the function dial to select V%, V', Ω□and A%function.
3. Display Hold — To hold the reading on the display, press and release HOLD .
To exit the display hold mode, press and release HOLD again.
4. Sensor Zone — Place conductor anywhere within the sensor zone (shades area shown as Figure 2).

Figure 1
4 1 3 2 5

SPECIFICATIONS
2-1 General specifications
LCD display digits : 3 1/2 digit large scale LCD readout.
Display count : 2000 count.
Measuring Rate : 2.5 times / sec.
Overrange display : “OL” is displayed for “A” and “Ω” functions, shows the real value for “V” function.
Low voltage indicator : □is displayed. Replace the battery when the indicator appears in the display.
Automatic power off time : Approximately 13 minutes after power on. To resume operation, turn the tester off,
and then on again.
Power Requirement : Single 9V battery (NEDA 1604, JIS 006P or IEC6LF22).

2-2 Enviromental conditions
Indoor Use.
Calibration : One year calibration cycle.
Operating Temperature : 0℃~ 30℃(≦80%RH), 30℃~ 40℃(≦75%RH), 40℃~ 50℃(≦45%RH)
Storage Temperature : -20℃~ + 60℃(below 80% RH) with battery removed.
Temperature Coefficient : 0.2 x (Specified accuracy) / , < 18℃, > 28℃.
Operating Altitude : 2000m (6562ft)
Battery Type and Life : ALKALINE PP3, 9V 250 hours.
Overvoltage Category : IEC 1010 600V CAT.Ⅲ.
Pollution Degree : 2 Class Ⅱ
Shock Vibration : Sinusoidal vibration per MIL-T-28800E (5Hz to 55Hz, 3g maximum).
2-3 Electrical Specifications
Accuracy is ±(% reading + number of digits) at 23℃±5℃< 80%RH.

1. Voltage
Function Range Resolution Accuracy Overload Protection
V%600V rms 1V
±
(
1.5% + 3 di
g
its
)
40Hz
~ 500Hz 600V rms
V'600V 1V ±(1.0% + 2 digits) 600V rms
Input impedance : 1MΩ// less than 100pF.
2. Resistance & Continuity

Function Range Resolution Accuracy Overload Protection
Ω□2000Ω1Ω±(1.0% + 2 digits) 600V rms
Max. Open Circuit Voltage : 3V
Continuity check : Internal sounder activates if the resistance of the circuit under test is less than 25Ω. It will
then turn off if the resistance is increased beyond 400Ω.
3. AC Current
Function Range Resolution Accuracy Overload Protection
A%200A 0.1A
±
(
3.0% + 3 di
g
its
)
45Hz
~ 66Hz 200A
* Adjacent conductor influence : <0.05 A/A
OPERATION
This instrument has been designed and tested in accordance with IEC Publication 1010, Safety Requirements for

Electronic Measuring Apparatus, and has been supplied in a safe condition. This instruction manual contains
some information and warnings which have to be followed by the user to ensure safe operation and to retain the
instrument in safe condition.
3-1 Precautions and Preparations for measurement
1. If the meter is used near equipment that generates electro-magnetic interference, the display may become
unstable and indicate large errors.
2. Make sure that the battery is properly connected.
3. The instrument should only be operated between 0℃~ 50℃and at less than 80% R.H.
4. Do not use or store this instrument in a high temperature or high humidity environment and do not store the unit
in direct sunlight.
5. Do not replace the battery while the tester is powered on.
6. If the unit is not to be used a long period of time, remove the battery.
7. #Maximum rated voltage to earth for voltage measurement terminals is 600V CAT. III .
3-2 Measuring AC Voltage (V)
1. Rotate the function selector to the V%position.

2. Connect the probes to the device to be measured.
3-3 Measuring DC Voltage (V)
1. Rotate the function selector to the V'position.
2. Connect the probes to the device to be measured.
3-4 Measuring Continuity and Resistance (Ω)
1. Rotate the function selector to the Ω□ position.
2. Verify that the power to the circuit under test is off. Connect test leads to the circuit to make the measurement.
3. The internal sounder will operate if the resistance of the circuit under test is less than 25Ω, it will then turn off if
the resistance is increased beyond 400Ω.
3-5 Measuring AC Current (A)
1. Rotate the function selector to the A%position.
2. Refer to figure 2 and disconnect probes from probe test points.
3. Place the conductor anywhere within the sensor zone as shown in the shaded areas of Fig. 2.

OK OK
OK OK
Figure 2

MAINTENANCE
Protect the meter from adverse weather conditions. The meter is not waterproof.
Do not expose the LCD display to direct sunlight for long periods of time.
#CAUTION. To avoid damage to the meter, do not expose it to sprays, liquids, or solvents. Clean the exterior
of the meter by removing dust with a lint-free cloth. Use care to avoid scratching the clear plastic
display filter. For further cleaning, use a soft cloth or paper towel dampened with water. You can
use a 75% isopropyl alcohol solution for more efficient cleaning.
#CAUTION. To avoid damage to the surface of the meter, do not use abrasive or chemical cleaning agents.
Battery Replacement (Refer to Fig.3)
1. Disconnect the test leads from any circuit under test and turn off meter.
2. Disconnect probes from probe storage on back.
3. Loosen the screw from the battery cover on bottom case.
4. Remove battery cover.
5. Install a new battery after removing the original one.
6. Assemble battery cover onto bottom case with screw driver.

Figure 3