GB GCM-500 User Manual [en, es, fr]

Analog Multitester

Analog Clamp Meter

Owners Manual Model #GMT-12A

Polímetro Analógico de Abrazadera

Pince De Mesure Analogique

•Read this owners manual thoroughly before use and save.

•Lea atentamente este manual del propietario antes de utilizar y guardar.

•Lisez ce manuel entièrement avant utilisation et rangez-le soigneusement.

										Ω
						60V				R
				~60V
			~300V
			~600V
			~600A
			~60A
				~6A
				300		400
		200						50
	00		20		30	40			0
0	1	10	2		3	4		50		600
		1						5		60 A
			100	50	20	10	5		6
		∞						0	ΩV
			COM					VΩ
					600V
					MAX

GCM-500

Gardner

Bender

			1. Meter Functions
		Contents	Figure 1
1.	Meter Functions
2.	Specifications
	2.1	For Your Safety
3.	Operating Suggestions
	3.1	Measuring Resistance
	3.2	Measuring AC & DC Volts
	3.3	Measuring AC Amps

4. Battery and Fuse Replacement	Zero Ohms
	Adjustment
	Dial

Battery/

Fuse

Cover

Needle

Ω

60V R

~60V

	~300V	Function/
	~600V	Range
	~600A	Selector
	~60A
		Switch
	~6A

		0
0	10
	A	0

			300
0
20
		20
10		2
	1
0		00	50
V		01
	50
Ω	1k
∞

		400
	30	40
	3
		4
	20	10

5

	5
	00
50
5
	6
	V
0	Ω

6 0 0

A

Analog

Scale

COM	VΩ	Mechanical
MAX		Zero Adjust
600V
		Screw

Input Jacks

1

2

2. Specifications

Ranges:	8 measuring ranges
DC Voltage:	60 Volts
AC Voltage:	60-300-600 Volts
AC Current:	6-60-600 Amps
Resistance (Ohms):	1K OHM
Accuracy:	DC voltage = 4% full scale of range
	AC voltage = 5% full scale of range
	AC current = 5% full scale of range
	Resistance = 4° arc of scale length
Sensitivity:	2300 OHMS per AC Volt, 2500 OHMS per DC Volt
Function/Range switch:	4 functions
	8 positions

Zero Ohms Adjustment Dial: Located on the right side of the housing;

dial is used to zero the needle indicator on the ohms scale while shorting the test leads together.

Mechanical Zero
Adjustment Screw:	Adjusts needle indicator to read zero
	at the left side of the scale before taking
	any measurement.
Recessed Input Jacks:	Negative (-) input jack for black test lead, positive
	(+) input jack for red test lead.
Fuse:	.5 Amp/250 Volt
Battery:	One “AA”

Important:

Read this operators manual thoroughly before using this multimeter. This manual is intended to provide basic information regarding this meter and to describe common test procedures which can be made with this unit. Many types of appliance, machinery and other electrical circuit measurements are not addressed in this manual and should be handled by experienced service technicians.

! WARNING Use extreme caution when using this meter. Improper use of this meter can result in severe damage to property, severe personal injury or death. Follow all instructions and suggestions in this operators manual as well as observing normal electrical safety precautions. Do not use this meter if you are unfamiliar with electrical circuits and proper test procedures.

2.1 For Your Safety

1)Use extreme caution when checking electrical circuits.

2)! WARNING Do not stand in wet or damp work areas when working with electricity. Wear rubber-soled boots or shoes.

3)		! WARNING	Do not apply more voltage or current
		than the set range of the meter will allow.
4)		! WARNING	Do not touch the metal probes of the test
		leads when making a measurement.

5)Replace worn test leads. Do not use test leads with broken or tattered insulation.

6)Discharge a capacitor before measuring it.

7)Remove the test leads from the circuit being measured as soon as the test is completed.

8) ! WARNING Do not measure voltage when the function/range switch is set on the resistance (ohms) range. Never measure current when the meter is set on the resistance range. Never measure AC voltage when the meter is set on DC voltage. Setting the meter on the incorrect function may burn out some of the internal circuitry and may pose a safety hazard.

3. Operating Suggestions

1)Set the function/range switch to the proper position before making a measurement. When the voltage or current is not known, it MUST be determined that the capacity of the selected range will handle the amount of voltage or current in the circuit (see #3 under For Your Safety). Always start with the highest range in the function. If the reading falls within the range of a lower setting, reset the function/range switch to the appropriate setting for greater accuracy.

2)Avoid placing the meter in areas where vibration, dust or dirt are present. Do not store the meter in excessively hot, humid or damp places. This meter is a sensitive measuring device and should be treated with the same regard as other electrical and electronic devices.

3)Using the meter in areas with high magnetic fields can result in inaccurate readings. For greatest accuracy, lay the meter flat on a non-metallic surface.

3

4

4)Never immerse the meter in water or solvents. To clean the housing use a damp cloth with a minimal amount of mild soap.

Analog Meter: Reading the Scale

									0		4
									30						AC Current
											00
				0											Scale
				2	0								5
													0
								20		30				0
			0								40
		0								3					6
	1				0			2			4
													5		0
0					1
					1								0		0
A													5		A
			0
														0
									0	20				6	AC/DC
				0							1
								0	5		0			6	Voltage
							0					5
							1							V
				V			0								Scale
						5
							0
				Ω									0
				∞		1k

Resistance (Ohms) Scale

LOCKjaw™ : This special feature does not allow the jaws to open when the dial is in the OHMS or Voltage settings. The jaws are only used for taking amperage readings.

3.1 Measuring Resistance

Before making resistance or continuity tests, check the condition of the internal battery. First turn the function/range switch to the ohms position. Short the test leads together and the needle indicator should deflect to the right side of the scale. Keep the test leads shorted together while simultaneously turning the zero ohms adjustment

dial until the needle indicator reads zero at the right side of the scale. If the needle will not zero, replace the battery with a new 1.5 volt AA size battery.

Measuring AC & DC Volts

Note: Voltage measurements can only be made using the test leads and not the clamp-around jaws.

Set the function/range dial to the appropriate AC or DC voltage setting. Place the leads across the circuit under test and read the middle scale on the analog display. For proper voltage measurements multiply the reading on the scale by the chart below.

Range	Multiple Reading
Setting	on Scale By
60V DC	10			60V R
				Ω
			~60V
60V AC	10	~	300V
			~	6A
		~ 600V
		~600A
		~60A
300V AC	50			R		Lead				L ea
					ed					d
600V AC	100						B	la	ck

Measuring AC Amps

Set the dial to the proper AMPS range and open the jaws. Note that the jaws will only open when in the AMPS range. Place the jaws around a single conductor, either the hot or neutral wire, and read the measurement on the display. Note that the jaws must not be clamped around two wires or a false measurement will occur.

Ω

~

~			~
~	~	~

5

6