Amprobe RS-3 User Manual [en, es]

	Fig 13
HOW TO INSTALL
	Fuse
FUSE AND BATTERY
	Battery
Unscrewbaseofohmmeterbattery/fuse attachment	Case
insert fuse (Use Litte/fuse type 8AG - 360x023	Fuse
1AMPfast blow) and AAAbattery (Cal No 912, not
supplied) into probe end as shown in figure.	Battery
Screw base on to probe.
	Lid

NOTE: If you fail to get an ohmmeter indication or the indication is intermittent, before replacing the battery or fuse, lightly sand the base of the battery with fine sandpaper. This will remove any oxidation that could be causing poor or intermittent contact.

HOW TO USE AS AN OHMMETER

IMPORTANT:

Read "Precaution for Personal and Instrument Safety" before using instrument.

CAUTION: FOR RS-3 MODELS.

Make certain no voltage is present in circuit before connecting ohmmeter. The ohmmeter is fused to help protect it against a misapplication of voltage but under certain conditions it is still possible to damage the meter and/or cause personal injury. Use only OHB-3HE ohmmeter attachment with fuse #8AG-360x023. 1 Amp 600V.

1. Insert either the Red or Black Voltage Lead into the Left Voltage Receptacle at bottom of instrument case (Fig. 14).

2. Insert ohmmeter battery/fuse attachment		Fig	14
into the jack on the right side of the
instrument just below the ohmmeter Zero
Adjust Knob. Seat plug to bottom for
good connection (Fig. 15).
								Zero
3. Set range Selector so that the 150 volt								Adjust
								Knob
red scale appears in window.
		Fig 15
4. Ohmmeter Scale Adjustment with test
Leads Open-Pointer should line up with
division marked “∞” on OHMS SCALE.
Turn Pointer Zero Adjust Screw if neces-
sary (Fig. 16).

PAGE 4

5. With Test Leads Shorted-

Line up pointer with "0'' mark on ohms scale by turning Small Black Knob on right side of instrument (Fig 17)

NOTE: If ohmmeter zero adjust

knob does not line pointer up on zero mark, replace battery with a new one. Oxidation on base of battery can cause poor contact. Sand lightly to assure good contact.

6. To Measure Resistance
	Fig 18
between any two points on a
device, simply apply the clip lead
and the ohmmeter attachment
probe tip and read pointer.

CAUTION: Makecertainthatcircuit is disconnected from line before takinganyresistance measurements.

Zero		Fig 17
Adjust
Knob

HOW TO READ OHMMETER SCALE

The ohmmeter scale is located on the flat plate along the righthand edge of the window. The zero mark (beginning) is on top of the scale while the infinity mark “∞” ends the scale.

OPTIONALEXTENDO LEADS

FOR FASTER AND EASIER VOLTAGE TESTING

EXTENDO TESTLEADS. Cal. No VLK-411R. have 5 inch long insulated probes for a man-sized grip. One probe clamps between instrument jaws. Optional alligator clip adaptor (Cat No VRC-320)

converts probe so it can be fastened to test point. Fig 19 Probe tips are replaceable (Cat No VPT) Fig 19

FACTORY SERVICE

If the instrument fails to operate, check battery, test leads, etc and replace as necessary. If the instrument still malfunctions, please call the phone number listed below:

Tel: [phone]

Outside the U.S.A. the local Amprobe representative will assist you.

RANGE-EXPANDING ACCESSORIES

Mode	Ratio	Maximum Range Capability
A50-1	10 to 1	1,200 amperes*
CT-50-1	50 to 1	6,000 amperes*
CT-50-2	50 to 1	3,600 amperes*

*Intermittent duty

All of the above are clamp-on type transformers. Models CT-50-1 (six link) and CT-50-2 (four link) are flexible link construction.

Request Cal. No, AAD38.

OTHER ACCESSORIES & REPLACEMENT PARTS

Model	Description
VL-11R..............................................................................	Leads
VLK-411R.........................................................................	Extendo Leads
VPT...................................................................................	Replacement Tips
OHB-3HE .......................................................................	Ohmmeter Attachment
8AG-360x023....................................................................	Fuse - 600V. 1Amp
A-47L................................................................................	Energizer
ADP-46.............................................................................	Ground adaptor
912....................................................................................	Buttery AAA
VRC-320...........................................................................	Alligator Clip
	PAGE 5

OPERATING P/N 915741 Rev.B

INSTRUCTIONS

for

AMPROBE®

Rotary Scale

Clamp-on

Model RS-3

Reg. U.S. Pat. office

Patent nos. 2,663,845

Others Pending

See Precautions for Personal and

Instrument Safety on Page 1

SPECIFICATIONS

AC Voltage Ranges: 0- 150/300/600

AC Amp Ranges: 0-6/15/40/100/300

Ohms : 25 Ohms mid-scale

Frequency Response: 50/60 Hz

Accuracy: Volts and Amps: – ± 3% of Full Scale 50 / 60 Hz based on sinusoidal waveform

Ohms – ±3% of arc. Duty: Continuous

Case Breakdown: 3500 Volts

Ohmmeter Protection: Ohm circuit is fuse protected to 600 Volts

|

®

AMPROBE

Miramar, FL www.amprobe.com

Phone: [phone] Fax: [phone]

PRECAUTIONS FOR PERSONAL

AND INSTRUMENT SAFETY.

IMPORTANT:

1.Read these instructions thoroughly and follow them carefully.

2.In any instances, you will be working withdangerous levelsofvoltage and/or current, therefore, it is important that you avoid direct contact with any uninsulated, current-carrying surfaces. Appropriate insulating gloves should be worn.

3.Before connecting or disconnecting the voltmeter to or from the circuit to be tested, turn off power to the circuit.

4.Before applying test leads to circuit under test, make certain:

a.Proper test leads are plugged into correct instrument jacks, and

b.Selector switch is set to proper range.

5.Before using any electrical instrument or tester for actual testing, the unit should be checked on a known Iive line to make certain it is operating properly.

6.Make certain no voltages is present in circuit, before connecting ohmmeter to circuit.

7.The jaws of clamp-on instruments Should not, under any circumstances, be used as a device to hold or hang the instrument. When using the instrument as a voltmeter or ohmmeter, never clamp the jaws around on to a conductor box or anything else - conducting or non-conducting. For easier and faster voltage and resistance tests, we recommend Extendo Leads, available from your AMPROBE distributor.

8.When measuring voltage or current with models that have an ohmmeter, remove the ohmmeter battery/fuse attachment from the instrument. Under no condition must the ohmmeter battery/fuse attachment be left plugged in whendoingampsorvoltsmeasurement.Usetheohmmeter battery/fuse attachment only when taking resistance measurements.

9.When making ohms measurement, be sure that theohmmeter attachment

is model OHB-3HE. This is the only attachment that should be used with the RS-3.

10.Failure to follow these precautions, can result in instrument damage and

or personal injury.

11.Before interpreting a reading on the Instrument be sure that the Pointer lock is free or in the off position. The pointer is free when button is at left position (See Fig. 2).

ZERO ADJUSTMENT

For greater accuracy, the pointer should be set on the zero line. This is done with the zero adjustment screw. If while turning the zero adjust screw, the pointer swings away from the zero line, and will not come to reset directly over it, it is possible that the scale window is statically charged. To neutralize - clean window with fluid from SCK-100 Anti Static Cleaning Kit.

Zero		80 ..
Adjust		.
		.
Screw		.
		60 ..
		.
		.
		.
		.
		40 .
Fig.1

HOW TO TAKE CURRENT READINGS

(See Pages 2 and 5 for range-expanding accessories) (All ampere ranges are printed black)

1. Make certain pointer Locks is in “OFF” position.

Pointer is free when
	button is at left.
								Rotary
					Pointer
TO PREVENT DAMAGE
								Scale
					Lock
TO	INSTRUMENT		DO					Selector
					Button
NOT	STORE	IT	WITH
POINTER IN		LOCKED
POSITION.							Fig. 2

2.Turn rotary scale selector until highest current range appears in window

3.Press trigger button to open Jaws

4.Encircle one conductor with the Transformer Jaws

5.Release finger pressure on Trigger toallowProbeJawstoclose around the conductor before attempting to read the meter

6.If pointer indicates below 40 Amps

(Fig 5)

DON'T READ

YET!

Fig. 5

Both conductors

WRONG!

Try it

Fig 3 again

Right! watch

the pointer

Fig 4

7.Set Rotary scale selector to next current range until a reading is obtained in the upperhall of scale.

Fig. 6

8.If the reading is below half scale on the lowest range of the meter and greater accuracy is desired either one of the following methods can be used

a.Loop the Conductor two or more 1,me, around the trans former laws and divide the reading by the number at turns.

b.Use the AMPROBE Energizer. It increases current measur-

ing sensitivity 10 times 0-6 amp range becomes 0-0 6 amps. Can also be used to take voltage measurements at receptaclesunderloadconditions.EnergizerGroundAdapter ADP46, available separately as an accessory enables A-47Lto be used for taking current measurements on 115VAC/15Amp equipment with ground plug while maintaining existing equipment ground circuit! See Fig 7

Fig. 7	Energizer model A-47L

Ground Adaptor ADP-46

HOW TO TAKE VOLTAGE READINGS

(All voltage ranges are printed red )

IMPORTANT:

Read “Precautions for Personal and Instrumental Safety” before using instrument.

1.Insert bayonet type voltage test leads into Voltage replacements at bottom of instrument. Push against receptacle spring and twist to lock in place (Fig 8)

2.Turn Rotary Scale Selector until highest voltage range -600 volts-appears

in window.

3.Connect one alligator Clip to one side of line. Then with meter in one hand, touch the other side of the line with the other alligator clip. If voltage does not exceed 600 volts, attach second alligator clip and read voltage on red scale.

4.If voltage does not exceed 300 volt, turn rotary scale selector clockwise until the 300 volt range is visible.

5.If voltage does not exceed 150 volt, turn rotary scale selector clockwise once

more until 150 volts scale is visible in window.

HOW TO READ THE SCALE

Let assume the pointer is at the position indicated in the illustration. The reading will be as follows, depending on the setting of the range selector.

Fig.10

Pointer Reads 440 Volts. Each between 400 & 500 is

is 20 volts.

Fig.11

Pointer Reads 78 Amps. Heavy mark between 60 & 80 is 70 amps. Each subdivision between 60 & 80 is 2 amps.

Fig.12

Pointer reads 12.7 Amps. Heavy mark above 12 is 13 amps. Each subdivision between 12 & 15 is 5 amp.

Fig. 10

Fig. 11

Fig. 12

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