LAA3E Amprobe AC Current Recorder Instruction Manual

LAA3E Amprobe AC Current Recorder

Overview

LIMITED WARRANTY

Congratulations!
You are now the owner of an AMPROBE® instrument. It has been quality crafted according to quality standards and contains quality components prop operation or all is rumens. has in tested oy qualified factory technicians according the long-established standards of AMPROBE INSTRUMENT. Your AMPROBE instrument has a limited warranty against defective materials and/or workmanship for one year from the date of purchase provided that, in the opinion of the factory, the instrument has not been tampered with or taken apart.
Should your instrument fail due to defective materials, and/or workmanship during the one-year warranty period, return It along with a copy of your dated bill of sale which must identify the Instrument by model number and serial number.

For your protection, please use the instrument as soon as possible. If damaged, or should the need arise to return your Instrument, it must be securely wrapped (to prevent sure or UPs white available repaid via Air Parcel Post in-

Service Division

AMPROBE INSTRUMENT
630 Merrick Road (For U.P.S.) P.O. Box 329 ( For P.P.) Lynbrook, NY 11563-0329

Outside the U.S.A. the local Amprobe representative will assist you. The above limited warranty covers repair and replacement of the instrument only and no other obligation is stated or implied.

PRECAUTIONS FOR PERSONAL AND INSTRUMENT SAFETY

1. Read these instructions thoroughly and follow them carefully.
2. In many instances you will be working with dangerous levels of voltage and/or current, therefore, it is important that you avoid direct contact with any uninsulated, current-carrying surfaces. Appropriate insulating gloves and clothing should be worn.
3. Before connecting or disconnecting the voltmeter to or from the circuit to be tested, turn off all power to the circuit.
4. Before applying test leads to the circuit under test, make certain:
5. Proper test leads are plugged into correct instrument jacks, and
6. The selector switch is set to the proper range.
7. Before using any electrical instrument or tester for actual testing, the unit should be checked on a known live line to make certain it is operating properly.
8. If the instrument fails to indicate, do not touch the circuit until vou have checked to see that all Instrument switches are in the proper position and the instrument has been checked on a known live circuit.

IMPORTANT:
Fallure to follow the Instructions or to observe the above precautions may result in personal injury and/or damage to the instrument and/or accessories.

INTRODUCTION

Model LAV3E-T can, on a time-sharing basis, sequentially record up to three AC voltages on the same chart. The supplied when attached to the cord sets provide insulated alligator clips for connection to distribution panels The three voltages A, B, and C are recorded in the following sequence: A, B, C, B, C, C. The trace for each voltage recorded on the chart has a different “dot” pattern (1, 2, or 3 dots) to Identify each voltage trace. One complete see sequence of recording all three voltages (A, B, C, B, C, C) takes only 30 seconds with a chart speed of 12 Inches per hour: one minute with a chart speed of 6 inches per hour; 6 minutes with a chart speed of one inch per hour.

SPECIFICATIONS

• Ranges: 0-150/300/600 Volts
• Power Requirements: 115 Volts 60Hz, unless otherwise indicated.
• Accuracy: ‡ 3% of full scale on sinusoidal waveforms (60 cycles unless otherwise stated.)
• Use Chart: cat. no. 830AV600 or 830AV600-6

CONNECTING

CONNECTING THE LAV 3E-T RECORDING VOLTMETER TO MONITOR A 3-PHASE 3-WIRE OR 4-WIRE SYSTEM

For Phase-to-Phase Voltage Measurements (3-wire):

• Connect one pair of the LAV3E-T test leads to phase AB. Connect the second pair of the LAVE-T test leads to phase BC.
• Connect the third pair of the LAV3E-T test leads to phase AC.

For Phase to Neutral Voltage Measurements (4-wire):
Connect one pair of LAVE-T test leads to points A and D. Connect the second pair of LAVE-T test leads to points B and D. Connect the third pair of LAV3E-T test leads to points C and D.

IDENTIFYING TRACES ON CHARTS

With the “ABC-AB-A” switch in the “ABC” position, the phase voltage connected to the test lead plugged into receptacle “A” on recorder will be recorded on the strip chart with a one-dot pattern; the phase voltage connected to the test lead plugged into receptacle “B” on the recorder will be recorded on the strip chart with a two-dot pattern; the phase voltage connected to the test lead plugged into receptacle “C” on the recorder will be recorded on the strip chart with a three-dot pattern.

ZERO ADJUSTING

1. With the chart drive switch in the “OFF” position (see fig. 2) exposing the word “OFF” check the mechanical zero setting of the pointer before making any electrical connections to the In- In-Strument (see fig. 3). If adjustment is necessary proceed as follows:
   • Remove the top cover–pull the bottom ledge of the frame toward you and lift. The top cover will come loose (see Fig. 4).
   • With the strip chart roll removed from the chart well, the zero adjust star wheel Is located at the bottom of the chart well (see Fig. 5).
   • Apply the finger to the star wheel and turn until the pointer lines up with zero at the extreme right side of the scale (fig. 3).

HOW TO USE AS A RECORDER

1. a) To insert chart paper, place the recorder in a horizontal position and press the release button in the direction shown in Fig. 6. Raise the recorder mechanism to a vertical position until it locks. Remove chart spindle (A) (see fig. 7 and place the chart roll on the spindle. Remove tape on the roll and retain tape for securing the chart on take-up spindle D. Unroll about 12″ to 15″ and route paper over the top edge of scale plate B underneath glass, over the sprocket wheels, to the rear and over the idle roller C up to the cardboard bobbin mounted on take-up spindle D. Secure edge of chart to bobbin with tape. Make sure the sprocket holes in the paper engage the sprocket wheels. Be sure that the feed control is tight and in the right position. The word “on” must be visible. Press in the idle roller extension C to allow the record ding mechanism to move back down into the case and lock Into position. Replace the cover by positioning the “U” bend onto the projections above the chart well opening. Make sure the chart paper is not binding with the cover in place. For “non-take-up” recording, route chart through the bottom slot as shown in Fig. 7.

2. b) To remove the chart from the take-up spindle (D) move the latches away from the take-up spindle. Turn the knurled knob on the spindle (D) until the slot in the take-up drives Put so in the side frame of the reporter. Slided he spit. die and chart up and out of the slots in the side frames of the recorder.

3. FOR RECORDING THREE VOLTAGES:
   Set the volt range switch to the appropriate range. Push the “ABC” “AB” and “A” switch into the “ABC” position. Plug 3 cord sets into volt receptacles A, B, and C and connect to a voltage source to be measured with adaptor leads if necessary.

4. FOR RECORDING TWO VOLTAGES:
   Set the volt range switch to the appropriate range (see Fig. 8). Push the “ABC” “AB”.”A” switch into the “AB” position. Plug 2 cord sets into volt receptacles A & B and connect to a voltage source to be measured with adaptor leads if necessary. The two voltages A and B will be recorded in the following sequence: ABABAA.

5. FOR RECORDING ONE VOLTAGE:
   Set the volt range switch to the appropriate range. Push the “ABC” “AB” and “A” switch to the “A” position. Plug cord set lead into volt receptacle A and connect to a voltage source to be measured with adaptor leads if necessary.

6. Plug the gray power line cord into the recorder line receptacle and connect it to the proper line voltage and frequency.

7. Push the chart drive switch to the “ON” position exposing the word “ON”. Make sure the switch clicks into the detent position which locks it Into place. See fig. 9.

8. Mark the time of start on chart paper. See fig. 10.

9. Secure the recorder in a horizontal or vertical position.

HOW TO USE AS AN INDICATING METER

1. Set the chart drive switch to the “OFF” position (see Fig. 2).
2. Remove the chart paper and adjust the pointer to zero setting (see page 6).
3. Follow steps 4 and 5 of “How to Use as a Recorder”.

SERVICE

The serial number is die-stamped in the lower right-hand corner of the scale plate.

For Factory service, package instrument and packing slip with sufficient cushioning material in a shipping carton; make certain your name and address also appear on the box as well as the packing slip; ship prepaid via U.P.S. (where available) or Air Parcel Post insured to:

Service Division
AMPROBE INSTRUMENT
630 Merrick Road (Use for U.P.S.) P.O. Box 329 (Use for Parcel Post) Lynbrook, NY 11563-0329

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

References

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