1. PRELIMINARY INFORMATIONS
Manufacturer
:
elc
59, avenue des Romains 74000 Annecy FRANCE
Phone
: +33 (0)4 50 57 30 46 - Fax : +33 (0)4 50 57 45 19
Web site
: https://elc.fr
Instrument
: DIGITAL METER
Brand
:
elc
Type
: LED2472 V / A
(Voltmeter or Ammeter)
2. DESCRIPTION
2.1 O
VERVIEW
2-2 P
RESENTATION
You have just purchased the
elc
digital meter 3 ½ digits LED2472. We thank you and congratulate you for
your good choice. This instrument is intended for applications requiring a precise measurement with a good
reading and with small dimensions.
LED2472 V/A (Voltmeter or Ammeter)
can take several ranges, it is a configurable device. It is able to
automatically adjust its measurement according to the input signal (DC / AC mode).
The AC mode is a TRMS measurement working on 90% of the signals (except the wavefront signals
increasing or decreasing really quick). The maximum display in AC is 1400 pts (the voltage or current peak
should not exceed 2000 pts). The range is calibrated in our factory.
2-3 T
ECHNICAL
FEATURES
Display
:
4 digits 14 mm red LED.
Temperature drift
:
0,011% / °C
(except for 200mA : 0.04%/°C ; 20mA : 0.022%/°C)
.
Accuracy
:
± 0,1%, ±1 digit DC and ± 0,25%, ±1 digit AC only on specified range, for
others ±1% max.
Display rate
:
1,7 per second in DC mode and 0,6 per second in AC mode.
Decimal Point
:
Three positions to choose by moving a jumper.
Excess
:
Obliteration of 3 digits on the right side in DC and display of "ERR"
message in AC mode.
CONFIGURATION
(V/A) :
selection of mode : Auto, DC or AC by menu,
delivered in Auto
.
-
DC
:
1999 points reading, positive and negative with negative sign display.
-
AC
:
1400 points reading.
Conversion
:
TRMS (Indicated by 2 flashing lines on the left side of the digital meter).
Frequency
:
40 - 750 Hz.
V
OLTMETER
Available ranges
:
2 V
20 V
200 V
500 V
Resolution
:
1 mV
10 mV
100 mV
1 V
Max. reading in DC.
:
1.999 V
19.99 V
199.9 V
500 V
Max. reading in AC.
:
1.400 V
14.00 V
140.0 V
500 V
Max. voltage
:
180 V
500 V
500 V
600 V
Input impedance
:
4 M
Ω
on every ranges.
A
MMETER
Available ranges
:
100mV
2 mA
20 mA
200 mA
2 A
Resolution
:
50
μ
V
1
μ
A
10
μ
A
100
μ
A
1 mA
Max. reading in DC.
:
19.99
1.999 mA
19.99 mA
199.9 mA
1.999 A
Max. reading in AC.
:
1400
1.400 mA
14.00 mA
140.0 mA
1.400 A
Max. voltage/current
:
9V
50 mA
160 mA
500 mA
2,5 A
Max. voltage fall
:
(4M
Ω)
100 mV on every ranges.
The 100mV input allows the plugging of a 20A/100mV shunt.
AJ1
AJ2
Pic. 8
4000 4 326 - 12/21
LED2472 DIGITAL METER INSTRUCTIONS MANUAL
Voltmeter / Ammeter
LED 2472
VOLTAGE
V
s
uppl
y
m
e+
e-
Us
e DC
or
A
C
LED 2472
CURRENT
V s
up
pl
y
m
e+
e-
Us
e DC
LED 2472
CURRENT
e-
e+
V s
up
pl
y
m
Us
e DC
or
A
C
LED 2472
VOLTAGE
LED 2472
CURRENT
e-
e+
m
e+
e-
m
V s
up
pl
y
Us
e DC
or
A
C
LED 2472
CURRENT
V
s
uppl
y
m
e+
e-
LED 2472
VOLTAGE
e+
e-
m
V
s
upp
ly
Us
e DC
or
A
C
CAUTION
V supply 1
separated
from
V supply 2
CAUTION
V supply 1
separated
from
V supply 2
LED 2472
CURRENT
V
su
ppl
y
m
e+
e-
LED 2472
VOLTAGE
e+
e-
m
V s
up
pl
y
Us
e DC
or
A
C
m
e+
e-
e+
e-
m
AL1040
or
AL48250
AL1040
or
AL48250
LED 2472
CURRENT
V s
up
pl
y
LED 2472
VOLTAGE
Us
e DC
or
A
C
These 2 galvanic insulated power supplies have been studied to meet user's needs :
They are delivered with an extension box that is clipsable to the back of LED2472.
AL1040 : input from 9 to 40 VDC or from 9 to 28 VAC (direct power supply on the battery or transformator
12 V, 24 V)
AL48250 : input from 40 to 254 VAC or from 40 to 350 VDC (48 V power supply or direct main).
5. CALIBRATION - CONFIGURATION
LED2472 are adjusted in our factory to the required range.
However, below are the adjustments if you want to change its calibration :
Nota : the recalibration or checking must be done by qualified technicians with instruments
linked to national standards of measure.
Calibration :
(
Pic. 8
)
AJ1 :
Adjustment of 0
AJ2 :
Adjustment of range gain (full scale)
6. MAINTENANCE
No particular maintenance is required for this instrument. Avoid dust, moisture and shocks.
7. AFTER SALES SERVICE
During
TWO YEARS,
spare parts and workmanship are guaranteed. This guarantee does not apply to
instrument presenting defects or failures caused by an improper use. Return expenses are borne by the client.
Only devices returned with a dated purchasing invoice can be recovered by the guarantee. Any intervention
carried out by unauthorized persons or organizations, shall void the guarantee
.
APPENDIX 1 : MAIN CONNECTION DIAGRAM
CAUTION:
Power supply chassis and "-" measurement input are internally linked.
If you want to measure on 2 digital meters, 2 voltages which have not the same reference, the power supply
to make them work can not be the same. They have to be supplied separately with the optional supplies
AL1040 ou AL48250 detailed at § 4.
In the case of a voltage or current reading, the mounting of a voltmeter and an ammeter with common
power supplies is only possible if :
the ammeter is in the negative circuit (-).
the voltmeter is plugged upstream of the ammeter.
The "-" inputs and chassis are common. Connect into only one point : the e- input of the LED2472 current.
