Aemc instruments 3910 User Manual
TRUE RMS POWER METER
3 910
E N G L I S H
User Manual
Owner’s Record
The serial number for the Model 3910 is located inside the battery compartment of the instrument. Please record this number and purchase date
for your records.
TRMS POWER METER MODEL 3910
CATALOG #: 2111.27
SERIAL #: _______________________________________________
PURCHASE DATE: ________________________________________
DISTRIBUTOR: ___________________________________________
Table of Contents
1. INTRODUCTION ............................................................................... 2
1.1 International Electrical Symbols ................................................3
1.2 Receiving Your Shipment ..........................................................3
1.3 Ordering Information .................................................................3
1.3.1 Accessories and Replacement Parts ............................3
2. PRODUCT FEATURES ...................................................................... 4
2.1 Description ................................................................................4
2.2 Control Features .......................................................................5
2.3 Display Features .......................................................................7
2.4 Button Functions ......................................................................7
2.4.1 PEAK Button .................................................................7
2.4.2 Memory Button .............................................................8
3. SPECIFICATIONS............................................................................. 9
3.1 ElectricalSpecications ............................................................9
3.2 MechanicalSpecications ......................................................10
3.3 SafetySpecications ..............................................................11
4. OPERATION .................................................................................. 12
4.1 Single-Phase Networks ..........................................................12
4.2 Balanced Three-Phase Networks ...........................................13
4.3 Three-Phase, Four-Wire Networks .........................................14
4.4 Using as a Voltmeter ...............................................................15
4.5 Using as an Ammeter .............................................................16
4.6 Measurements: Review of Formulas Used .............................17
5. MAINTENANCE ............................................................................. 18
5.1 Warning...................................................................................18
5.2 Battery Replacement ..............................................................18
5.3 Cleaning ..................................................................................18
Repair and Calibration ...........................................................................19
Technical and Sales Assistance ............................................................19
Limited Warranty ...................................................................................20
Warranty Repairs ...................................................................................20
CHAPTER 1
INTRODUCTION
WARNING
These safety warnings are provided to ensure the safety of
personnel and proper operation of the instrument.
• Read this instruction manual completely before attempting
to use or service this instrument and follow all the safety
information.
• Use caution on any circuit: Potentially high voltages and
currents may be present and may pose a shock hazard.
• The instrument must not be operated beyond its specied
operating range.
• Safety is the responsibility of the operator.
• Never open the back of the instrument while connected to
any circuit or input.
• Always make connections from the instrument to the circuit
under test.
• Always inspect the instrument and accessory leads for serviceability prior to use, and replace defective parts immediately.
• Do not use the meter or any test leads, connectors, probes or
clips if they look damaged.
• Never use the Model 3910 on electrical conductors rated
above 600V.
• On the current probe input, only use the current probe(s)
supplied with the instrument.
• Never use the Model 3910 without its rubber holster.
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TRMS Power Meter Model 3910
1.1 International Electrical Symbols
Thissymbolsigniesthattheinstrumentisprotectedbydoubleor
reinforced insulation. Use only specied replacement parts when
servicing the instrument.
This symbol on the instrument indicates a WARNING and that
the operator must refer to the user manual for instructions before
operating the instrument. In this manual, the symbol preceding
instructions indicates that if the instructions are not followed, bodily
injury, installation/sample and product damage may result.
Risk of electric shock. The voltage at the parts marked with this
symbol may be dangerous.
1.2 Receiving Your Shipment
Upon receiving your shipment, make sure that the contents are consistent
with the packing list. Notify your distributor of any missing items. If the
equipmentappearstobedamaged,leaclaimimmediatelywiththecarrier and notify your distributor at once, giving a detailed description of any
damage. Save the damaged packing container to substantiate your claim.
Do not use an instrument that appears to be damaged.
1.3 Ordering Information
TRMS Power Meter Model 3910........................................ Cat. #2111.27
Includes 3910 power meter, shock-proof safety holster, 500AAC clamp-on current probe, two
5 ft (1.5m) leads, two test probes, two probe grips, batteries (not installed), user manual and
hard carrying case.
1.3.1 Accessories and Replacement Parts
Probe Adaptor......................................................................Cat. #2118.34
Clamp-on Current Probe Model SR652 (1000AAC) ............. Cat. #2113.46
Order Accessories and Replacement Parts Directly Online
Check our Storefront at www.aemc.com for availability
TRMS Power Meter Model 3910
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CHAPTER 2
PRODUCT FEATURES
2.1 Description
The True RMS Power Meter Model 3910 is designed for today’s electrical
environments. Operation is simple. There are no programming requirements or menus, just four push-buttons for direct access. The Model 3910
is auto-ranging and ensures the best range for measurements.
Troubleshooting and measuring power is done simply by connecting two
voltage leads and clamping on the current probe. The Model 3910 is
easier to operate than most DMMs and may even replace your multimeter
for individual voltage or current measurements.
Small and compact in its protective holster, the Model 3910 provides seven
essential power measurement values. Four measurements are displayed
at a time on its extra large multi-display LCD.
The Model 3910 performs current and voltage measurements in True
RMS, and provides immediate readings of power factor (PF), active power
(kW), reactive power (kVar), apparent power (kVA) and frequency (Hz).
The Model 3910 displays Vrms,Arms, kW and PF on the rst screen;
pressing and holding the PAGE button gives access to kVar, kVA and Hz
on a second screen.
ThePeakfunctionallowsselectionofaspecicparameter(A,VorW)for
peak measurement, and also displays the associated values at the particular peak (for example, the Model 3910 displays the actual V, kW, PF,
kVar, kVA and Hz values when Apeak is selected).
The unique memory function permits not only storing the measurements
at any time, but also comparing subsequent readings by displaying the difference between the stored values and the new readings. This is helpful in
analyzing and measuring the impact of loads being turned on and off.
A selector switch on the front panel selects power measurements for
single-phase or balanced three-phase, three-wire systems.
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TRMS Power Meter Model 3910
2.2 Control Features
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2
3
5
6
7
8
9
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TRMS Power Meter Model 3910
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1. SEL Button
Selects the parameter (A, W, V) whose peak is to be measured.
2. MEM Button
Accesses two functions:
• Memory
• Measurements of differences in voltage, current and active power
between stored values and subsequent readings.
3. ON/OFF Switch
Turns the instrument ON or OFF. The Model 3910 takes a few seconds to power up when turned “ON”.
4. Clamp Input
FRB socket for connecting the clamp-on current probe. Use only
speciedcurrentprobes,whichhaveavoltageoutput(1mVAC/AAC).
5. Display
LCD (40x50mm), displays the seven measurements on two pages.
NOTE: A beep sounds when the PAGE, PEAK, SEL or MEM button
is pressed.
6. PEAK Button
Selects “PEAK” measurement mode.
7. PAGE Button
Displays Vrms, Arms, W, PF (or Cos Φ)onpage1automatically;
pressing PAGE gives access to Var, VA and Hz on page 2.
8. 1Ø / 3Ø
Selects the type of network to be tested.
• 1Ø: single-phase
• 3Ø: balanced three-phase, three-wire
9. Voltage Inputs
Two safety input terminals (4mm) for lead connection. Voltage measurement may be made up to 600VAC/DC.
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TRMS Power Meter Model 3910
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