LEM Analyst 2050 User manual

International Electrical Symbols
Caution! Refer to this manual before using the meter
Meter is protected by Reinforced or Double Insulation
CONTENTS PAGE
1INTRODUCTION................................... 2
1.1 Instrument Features............................ 3
2SPECIFICATION................................... 4
2.1 Electrical Data..................................... 4
2.2 General Data....................................... 8
3OPERATING INSTRUCTIONS.............. 10
3.1 Rotary Switch / Keypad Selections ...... 10
3.2 Voltage Measurement.......................... 11
3.3 Current Measurement.......................... 13
3.4 Watts /VA /PF /kWHr measurement.... 14
3.5 Watts 3Ø /VA /PF /kWHr measurement
15
3.6 Frequency / THD Measurement........... 16
3.7 Set Up................................................. 17
3.8 Data Logging – Quick Start ................. 17
3.9 Data Logging – Advanced.................... 18
3.10 WinLog ............................................. 20
4TECHNICAL DEFINITIONS................... 21
4.1 Measured parameters.......................... 21
4.2 Watts/VA/VAR/PF sign conventions .... 21
5SAFETY................................................ 22
6BATTERY REPLACEMENT.................. 23
7WARRANTY ......................................... 24
8OTHER PRODUCTS............................. 24
Issue 7 07/00

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1. INTRODUCTION
The advanced design of the Analyst ensures reliable and
accurate measurements under a wide range of operating
conditions. Measurement features include:
•Non-intrusive AC/DC current
•True RMS, Crest Factor and THD for complex and
distorted waveforms
•Volts / Watts / VA / PF / kWHr
•3 Phase measurements
•Screen SAVE mode
•MIN, MAX, AVE, REC Mode with time stamp
•Internal and PC Data logging*
•Multi parameter and waveform display modes
Additional Features Analyst 2060
•Live harmonics analysis and display
•Ripple measurement
•Extended memory for data logging
The Analyst conforms to the latest international directives
and standards concerning safety and electromagnetic
compatibility.
•European Low Voltage Directive 73/23/EEC and
93/68/EEC
•European EMC Directive 89/336/EEC and 93/68/EEC
Safety Standards
IEC 1010-1: 1992-09 Safety requirements for electrical
equipment for measurement, control and laboratory use.
Part 2-032: 1994-12 Particular requirements for hand
held current clamps for electrical measurement and test.
Part 2-031: 1993-02 Particular requirements for hand
held probe assemblies for electrical measurement and
test.
600V Cat IV (750V cat III) Pollution degree 2
EMC Standards
RF Susceptibility and Emissions
BS EN 61326 : 1998 Electrical equipment for
measurement, control and laboratory use – EMC
requirements.
RF Immunity. Annex C. Performance criteria A
RF Emissions. Limits for Class B equipment.
FCC Part 15 Class B *Requires optional WinLog accessory

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1.1 Instrument Features
The main operating features of the instrument are as
follows. See Fig. 1.
(1) Clamp-on jaws for current measurement
(2) Jaw opening lever
(3) Rotary switch for function selection
(4) Dot matrix LCD
(5) Screen cursor control
(6) REC mode. Time stamped MIN, MAX readings
(7) Backlight
(8) Oscilloscope / Harmonics mode
(9) HOLD and SELECT
(10) ZERO. Amps Zero
(11) SAVE. Screen save mode
(12) Numeric display mode
(13) and (14) Test lead input terminals
(15) Digital output
Fig. 1
Instrument Features
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5
6
7
8
13
14
15
12
11
10
9
3
4
1

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2. SPECIFICATION
2.1 Electrical data
(All accuracies stated at 23°C ± 1°C)
2.1.1 Current measurement
(DC, DCRMS, ACRMS)
Measuring range................... 0 - 2000A DC or AC pk
Autorange facility.................. 40A / 400A / 2000A
Resolution ............................ 10mA in 40A range
100mA in 400A range
1A in 2000A range
Accuracy
RMS and DC
I > 10A .......................... ± 1.5% rdg ± 5 dgts
I < 10A .......................... ± 0.2A
AVE
I > 10A .......................... ± 3% rdg ± 5 dgts
I < 10A .......................... ± 0.5A
Pk I > 10A .......................... ± 5% rdg ± 5 dgts
I < 10A .......................... ± 0.5A
AHrI > 10AHr....................... ± 2% rdg ± 5 dgts
I < 10AHr....................... ± 0.5AHr
CF (Crest Factor)
1 ≤CF < 3...................... ± 3% rdg ± 5 dgts
3 ≤CF < 5...................... ± 5% rdg ± 5 dgts
Resolution...................... 0.01
RPL (Ripple)
2% ≤RPL< 100%.......... ± 3% rdg ± 5 dgts
100% ≤RPL< 600%...... ± 5% rdg ± 5 dgts
Resolution...................... 0.1%
IDC >5A, IAC >2A
All measurements DC and 10Hz to 1kHz.
Maximum overload 10,000A or
RMS x frequency < 400,000. Amps RMS
is a true RMS measurement (AC + DC)
Harmonics
THD (Total Harmonic Distortion)
1% ≤THD < 100% ........ ± 3% rdg ± 5 dgts
100% ≤THD < 600% .... ± 5% rdg ± 5 dgts
Resolution...................... 0.1%

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DF (Distortion Factor)
1% ≤DF < 100% ........... ± 3% rdg ± 5 dgts
Resolution...................... 0.1%
H02 ≤Iharm <H13............ ± 5% rdg ± 2 dgts
H13 ≤Iharm ≤H25........... ± 10% rdg ± 2 dgts
All measurements up to 25th harmonic
Frequency range F045Hz to 65Hz
Iacrms >10A, Iharm >10% Iacrms
2.1.2 Voltage measurement
(DC, DCRMS, ACRMS)
Measuring range................... 0 - 750V DC or AC
Autorange facility .................. 4V / 40V / 400V / 750V
Resolution............................. 1mV in 4V range
10mV in 40V range
100mV in 400V range
1V in 750V range
Accuracy
RMS and DC
V > 1V .......................... ± 1% rdg ± 5 dgts
V < 1V .......................... ± 0.02V
AV V > 1V .......................... ± 3% rdg ± 5 dgts
V < 1V .......................... ± 0.03V
Pk V > 1V .......................... ± 5% rdg ± 5 dgts
V < 1V .......................... ± 0.03V
CF (Crest Factor)
1 ≤CF < 3...................... ± 3% rdg ± 5 dgts
3 ≤CF < 5...................... ± 5% rdg ± 5 dgts
Resolution...................... 0.01
RPL (Ripple)
2% ≤RPL< 100% .......... ± 3% rdg ± 5 dgts
100% ≤RPL< 600% ...... ± 5% rdg ± 5 dgts
Resolution...................... 0.1%
VDC >0.5V, VAC >0.2V
All measurements DC and 10Hz to 1kHz.
Maximum overload 1,000 V RMS
Volts RMS is a true RMS measurement (AC + DC)
Harmonics
THD (Total Harmonic Distortion)
1% ≤THD < 100%......... ± 3% rdg ± 5 dgts
100% ≤THD < 600%..... ± 5% rdg ± 5 dgts
Resolution...................... 0.1%

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DF (Distortion Factor)
1% ≤DF < 100%........... ± 3% rdg ± 5 dgts
Resolution...................... 0.1%
H02 ≤Vharm <H13.......... ± 5% rdg ± 2 dgts
H13 ≤Vharm ≤H25......... ± 10% rdg ± 2 dgts
All measurements up to 25th harmonic
Frequency range F045Hz to 65Hz
Vacrms >1V, Vharm >10% Vacrms
2.1.3 Watts measurement (Single and 3 Phase)
(DC, DCRMS, ACRMS)
Measuring range................... 0 - 1200kW DC or
850kW AC
Autoranging facility............... 4kW, 40kW, 400kW,
1200kW
Resolution ............................ 1W in 4kW
10W in 40kW
100W in 400kW
1kW in 1200kW
Accuracy .............................. 2.5% rdg ± 5 dgts
W1Ø < 2kW....... ± 0.08 kW
W3Ø < 4kW....... ± 0.25kW
2.1.4 VA measurement (Single and 3 Phase)
(DC, DCRMS, ACRMS)
Measuring range................... 0 -1200kVA DC or
850kVA AC
Autorange facility.................. 4kVA, 40kVA, 400kVA,
1200kVA
Resolution ............................ 1VA in 4kVA
10VA in 40kVA
100VA in 400kVA
1kVA in 1200Kva
Accuracy VA > 2kVA.......... 2.5% rdg ± 5 dgts
VA < 2kVA..........± 0.08kVA
2.1.5 VAR Measurement (Single and 3 Phase)
Measuring range................... 0 - 850kVAR
Autorange facility.................. 4kVAR, 40kVAR,
400kVAR, 850kVAR
Resolution ............................ 1VAR in 4kVAR
10VAR in 40kVAR
100VAR in 400kVAR
1kVAR in 850kVAR
Accuracy VAR > 4kVAR... ± 2.5% rdg ± 5 dgts
VAR < 4kVAR... ± 0.25kVAR
Power Factor range.............. 0.3 < PF < 0.99
2.1.6 Power Factor (Single and 3 Phase)
Measuring range 0.3 cap … 1.0 … 0.3 ind
(72.5° cap ... 0° ... 72.5° ind)

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Resolution............................. 0.01
Accuracy............................... ± 3°

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2.1.7 Kilowatt Hour (kWHr)
Measuring range................... 40,000kWHr
Autorange facility.................. 4kWHr, 40kWHr,
400kWHr, 4,000kWHr,
40,000kWHr
Resolution ............................ 1WHr in 4kWHr
10WHr in 40kWHr
100WHr in 400kWHr
1kWHr in 4,000kWHr
10kWHr in 40,000kWHr
Accuracy kWHr > 2kWHr.... ± 3% ± 5 dgts
kWHr < 2kWHr.... ± 0.08kWHr
All Watts /VA /VAR /PF measurements
Frequency range .................. DC and 10Hz to 1kHz
Current range....................... 10A to 1400A RMS
Voltage range ....................... 1V to 600V RMS
Maximum input..................... 600V RMS / 2000A Pk
Maximum overload................ 1000V RMS / 10,000A
2.1.8 Frequency measurement
(From Current or Voltage sources)
Measuring range................... 10Hz to 1kHz
Resolution ............................ 0.1Hz
Accuracy 40 - 70Hz............. ± 0.5% rdg
10 - 1000Hz......... ± 1% rdg
Current Range...................... 10A to 1400A RMS
Voltage Range...................... 1V to 600V RMS
2.1.9 Scope Function
2.1.9.1 Current measurement
Ranges................................. 10A/20A/40A/100A
200A/400A/1000A/2000A
Resolution ............................ 1A in 40A
10A in 400A
50A in 2000A
Accuracy .............................. ± 3% rdg ± 1 pixel
Maximum overload................ 10,000A

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2.1.9.2 Voltage measurement
Ranges................................. 4V/10V/20V/40V/100V
200V/400V/1000V
Resolution............................. 100mV in 4V
1V in 40V
10V in 400V
31.25V in 1000V
Accuracy............................... ± 2% rdg ± 1 pixel
Maximum overload................ 1000V RMS
Frequency range................... DC and 10Hz to 600Hz
Time base............................. 2ms, 4ms, 10ms,
50ms/div
Refresh rate.......................... 0.5 seconds
Maximum sampling rate........ 9.6kHz
50ms/div
2.1.10 Digital output
RS-232 Interface to a PC
9600 baud 1 start bit 8 data bits 1 stop bit
Requires WinLog interface and software
2.2 General Data
2.2.1 Display
Backlit dot matrix LCD 160 x 128.
2.2.2 Power Supply
Battery type 1.5V Alkaline AA MN 1500 or IEC LR6 x 6
Battery life typically:
24 hours (backlight off)
12 hours (backlight on)

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2.2.3 Environmental
FOR INDOOR USE ONLY
Reference conditions. All accuracies stated at
23°C ± 1°C
Operating temperature 0°C to 50°C (32°F to 122°F)
Temperature coeff. of current ≤±0.15% of rdg per °C
Temperature coeff. of voltage ≤±0.15% of rdg per °C
Maximum relative humidity 80% for temperatures up to
31°C (87°F) decreasing linearly to 50% relative humidity
at 40°C (104°F)
Maximum operating altitude 2000m
2.2.4 Mechanical
Dimensions ....................... Length 300mm (12 inches)
Width 98mm (3.75 inches)
Depth 52mm (2 inches)
Weight inc. batteries.......... 820g / 1.8lbs.
Case material .................... Bayblend T85
Jaw opening ...................... 60mm
Jaw capacity...................... 58mm diameter
Accessories....................... Voltage probes
Crocodile Clips
Carrying case
Operator’s manual
Cleaning............................ The unit can be cleaned
with an Isopropanol
impregnated cloth.
Do not use abrasives or
other solvents.
2.2.5 Power-up
At power-up the following screen is displayed for 5
seconds indicating the battery status. The remaining
battery lifetime is displayed, with and without the backlight.
When the display changes to the digital mode, the
instrument is ready for use.

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3. OPERATING INSTRUCTIONS
International Symbols
Important Information
(See Manual)
Double Insulation
3.1 Rotary Switch / Keypad selections
The instrument functions are selected by a rotary switch
and an 8 key keypad. The rotary switch positions are as
follows:
OFF Instrument off
VVoltage
ACurrent
Hz Frequency / THD
WPower
W3∅3 phase Power
Set up Options Menu
Log Logging Menu
When switching the instrument ON, wait for the auto
calibration, flashing CAL, to finish, before clamping the
jaw on a conductor or applying the test leads to the circuit.
The push button keys are as follows:
1. Option cursor movement and screen changer
2. HOLD and Option select
3. REC mode (Min, Max, Ave)
4. ZERO Amps auto zero
5. Backlight ON / OFF
6. SAVE
7. Oscilloscope/Harmonics (2060) mode
8. Numeric Display mode
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3 4
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78

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REC
This function stores the minimum, maximum and average
values of all displayed parameters. The clock shows the
elapsed time in hours and minutes HH : MM since starting
the REC function when displaying ‘Average’ and ‘Now’
values and gives a time stamp for when the ‘MIN’ and
‘MAX’ values occurred. The time stamp refers to the main
first parameter on the display. If the real time has been set
in the LOG/SET TIME menu then the clock displays the
real time.
SAVE Mode
This function allows the capture of up to 8 screens which
can be either waveforms or numerical data. For the 2060
both waveform and harmonics screens are captured
simultaneously in one memory location. Pressing the
SAVE mode key brings up the following text on the
screen: SAVE RECOVER CLEAR
1 2 3 4 5 6 7 8
Use the key to move the cursor and the
key to select either SAVE, RECOVER or
CLEAR. Repeat this process to select one of the SAVE
locations from 1 to 8.
The whole screen is saved in the selected location and
can be recovered at a later date - even after the
instrument has been powered off. A second press of the
SAVE key returns the instrument back to the normal mode
of operation.
3.2 Voltage measurement of RMS or DC Voltage
•Move the rotary switch to the V position.
•Insert the test leads into the sockets on the
front of the instrument. Connect the red lead to the
V terminal, and the black lead to the COM terminal.
•Apply the test leads to the circuit under test
and read the displayed voltage. See Fig. 2.
•Use the key to change the parameters
displayed.
Screen 1 = V RMS (AC + DC) VDC
Screen 2 (2050) = V RMS,V Av,V Pk,V CF,V Hz
Screen 2 (2060) = V RMS,V Av,V Pk,V CF,V Rpl
•Use the HOLD key to freeze the display.
•Use the key to display the waveform of the
voltage and the key to change the timebase.
•Use the key to display the harmonic content
of the voltage and the key to select individual
harmonics (2060 only)
•Use the 8888 key to return to the digital display.
SAFETY WARNING
To avoid possible electric shock and damage
to the instrument, do not attempt to measure
any voltage that might exceed the maximum
range of the instrument - 600Vrms and 1kHz

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•Use the REC key to enter the RECORD mode. Use
the key to show the MAX, MIN, AVE displays
of the screen readings. Press the REC key again to
exit.
Fig. 2
Voltage Measurement

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3.3 Current measurement
•Remove any Voltage test leads from the
instrument.
•Move the rotary switch to A position.
•Press the trigger to open the jaws and clamp around
the current carrying conductor as shown in Fig. 3.
•Read the display. A “-“ polarity indicates a DC current
flowing in a direction opposite to the arrow on the
instrument case.
•Use the key to change the parameters
displayed.
Screen 1 = A RMS (AC + DC) A DC
Screen 2 (2050) = A RMS,A Av,A Pk,A CF,A Hz
Screen 2 (2060) = A RMS,A Av,A Pk,A CF,A Rpl
•Use the HOLD key to freeze the display.
•Use the key to display the waveform of the
current and the key to change the timebase.
•Use the key to display the harmonic content
of the current and the key to select individual
harmonics (2060 only)
•Use the 8888 key to return to the digital display.
•Use the ZERO key to zero the display if necessary or
if relative readings are required.
•Use the REC key to enter the RECORD mode. Use
the key to show the MAX, MIN, AVE values of
the screen readings. Press the REC key to exit.
Fig. 3
Current Measurement

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3.4 Measurement of Watts / VA / PF / kWHr
(Single Phase)
•Move the rotary switch to the W position.
•Insert the test leads into the sockets on the front of
the instrument. Connect the red lead to the V terminal,
and the black lead to the COM terminal.
•Press the trigger to open the jaws, and clamp them on
the current carrying conductor, as shown in
Fig. 4.
•Read the display. See section 4.2 for details on the
sign conventions
•Use the key to change the parameters
displayed.
Screen 1 = kW, kVA, kVAR, PF, kWHr
Screen 2 = kW, V RMS, A RMS, PF, AHr
•Use the HOLD key to freeze the display.
•Use the REC key to enter RECORD mode. Use the
key to show the MAX, MIN, AVE displays of
the screen readings. Press the REC key again to exit.
Fig. 4
Single Phase Watts Measurement

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3.5 Measurement of Watts / VA / PF / kWHr in a
balanced system (3 Phase)
Fig. 5
Watts 3∅Configuration
•Move the rotary switch to the W3∅position.
•A screen prompt, Fig. 5, indicates the above method
of connection.
•Insert the test leads into the sockets on the front of
the instrument. Connect the red lead to the V terminal
and the black lead to the COM terminal.
•Apply the test leads to the circuit under test:
Red lead to Phase L2
Black lead to Phase L3
•Press the trigger to open the jaws and clamp them
around the current carrying Phase L1, as shown in
Fig. 5.
•Read the display. See section 4.2 for details on the
sign conventions
•Use the key to change the parameters
displayed.
Screen1 = kW, kVA, kVAR, PF, kWHr
Screen2 = kW, V RMS, A RMS, PF, AHr
•Use the HOLD key to freeze the display.
•Use the REC key to enter RECORD mode. Use the
key to show the MAX, MIN, AVE displays of
the screen readings. Press the REC key again to exit
this mode.
W3∅gives the total power based on a balanced system.

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3.6 Frequency / THD Measurement
•Move the rotary switch to the Hz position.
•Insert the test leads into the sockets on the front of
the instrument. Connect the red lead to the V
terminal, and the black lead to the COM terminal.
•To measure the frequency of the voltage supply apply
the test leads to the circuit as shown in Fig. 2 and
read the display.
•To measure the frequency of the current, press the
trigger to open the jaws, and clamp them on the
current carrying conductor, as shown in Fig. 3 and
read the display.
•Use the key to change the parameters
displayed.
Screen 1 = Hz, ACRMS
Screen 2 = Hz(Fo), ACRMS, THD, DF
See Section 4.1 for definitions of the measured
parameters.
•When configured to measure power (Fig. 4) with the
test leads connected and the jaws clamped around a
current carrying conductor, the instrument displays
the frequency of the current source (providing ARMS
> 10A). If ARMS < 10A, a volts frequency
measurement will be made (providing VRMS > 1V),
otherwise ---.- will be displayed.
•Press the HOLD / ZERO button to freeze the display.
•Use the REC key to enter RECORD mode. Use the
key to show the MAX, MIN, AVE displays of
the screen readings. Press the REC key again to exit
this mode.
•Use the key to display the waveform of the
current / voltage and the key to change the
timebase.
Additional features 2060
•Use the key to display the harmonic content
of the current/voltage and the key to select
individual harmonics.

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3.7 Set Up
The following screen is displayed:
C O N T R A S T XXXXXXXX
A U T O P O W E R DOWN O N or O F F
R A N G I N G O N or O F F
L O W P A S S F I L T E R O N or O F F
P F D I S P L A Y D E G or C O S ∅∅
S E L E C T C H A N G E
LOW PASS FILTER (ON) = -12dB / octave, F>100Hz
Default settings are shown in bold.
The keys are used to make selections from the menu.
3.8 Data Logging – Quick Start
3.8.1 Creating a data log
•Turn the rotary switch to LOG
•Select ENABLE LOG and change to ON
•Turn the rotary switch to either V, A, Hz, W, W3Ø
•Use key to select the required screen
•Logging will commence approximately 5 seconds
later
The instrument will now log all displayed parameters to
internal memory for 1 hour. The default interval between
logged readings is 10 seconds.
Logging can be stopped at any time by turning the rotary
switch or pressing the key to change the display.
3.8.2 Displaying logged data
•Turn the rotary switch to LOG
•Select Display Data
•Select the parameter to be displayed.
•A chart display shows variations in the measured
value with time together with MIN, MAX, AVE values
and the total logging period and logging interval.
To download data to a PC, or log continuously to a PC,
the WinLog software and interface accessory is required.

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3.9 Data Logging – Advanced
Selection of the rotary switch position ‘LOG’ brings up the
following menu:
OPTIONS
LOG INT <PC>
SET TIME
ENABLE LOG OFF <ON>
DISPLAY DATA
SEND TO PC
SELECT CHANGE
Two modes of data logging are available: either logging to
an internal non-volatile memory or logging to an external
PC, using the digital output lead.
INT Indicates internal logging
PC Indicates external (to a PC) logging
In PC mode, data is continually sent to the digital output
and is not logged within the instrument. The Analyst logs
all the parameters shown on the instrument display.
3.9.1 SET TIME
This gives access to the SET LOGGING TIMES menu,
allowing the setting of current, start , stop times and the
logging interval.
Increments the selection
Moves on to the next selection
For ease of operation if the current time is changed, then
the start is automatically reset to this time + 60 minutes,
and the end time is set to the start time + 60 minutes.
The minimum sample interval is 1 second, and the
maximum sample 1 hour. A 24 hour clock is used.
Start / Stop and logging intervals can be selected as
required.
SET LOGGING TIMES
CURRENT TIME HR:MIN
START TIME HR:MIN
END TIME HR:MIN
SAMPLE INTERVAL MIN:SEC
EXIT
The maximum number of points that can be logged is:
2050 = 5000 rdgs, 2500 sets of 2 or 1000 sets of 5
2060 = 10000 rdgs, 5000 sets of 2 or 2000 sets of 5

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The maximum logging duration is determined by the
battery life (24hrs.) and the memory. Data being logged is
an average over the sample period.
Using this information the maximum logging period can be
calculated. For example, if logging the second Watts
screen which shows 5 parameters, with a logging interval
of 10 seconds, the maximum logging period would be:
Analyst 2050
1000 x 10 seconds = 2 hrs 46 mins
Analyst 2060
2000 x 10 seconds = 5 hrs 33 mins.
3.9.2 ENABLE LOG
This enables the logging session. The low battery symbol
flashes if there is insufficient battery life to complete the
logging session defined in the SET TIME menu.
When internal logging is enabled the logging will
commence within 5 seconds of selecting the
measurement screen with the rotary switch and
key. All data displayed on the selected screen will be
logged. ‘MEMORY’ flashes if there is insufficient memory
to complete the logging session defined in the SET TIME
menu. Once logging has commenced an on screen timer
counts down the remaining logging period. Logging will
terminate if the screen display is changed through moving
the rotary switch or pressing the key before the
end of the logging session.
If PC logging is enabled, all measurements appearing on
the instruments display will be logged to the PC. Logging
will not terminate if the screen is changed.
3.9.3 DISPLAY DATA
This menu allows the user to recover data from the
internal memory. On entry to this menu a list of the
parameters which have been logged are displayed. The
key increments through the list, and the
key selects ONE parameter for display. For example:
ARMS, A Av, A Pk, A CF
3.9.4 EXIT returns to the previous menu.
On the chart display screen the single parameter is shown
vs time, and an EXIT is displayed on the screen allowing
the user to return to the logging parameter select menu.