Elenco Electronics LCM-1950 Operating Instructions

OPERATING INSTRUCTIONS

ELENCO LCM-1950
DIGITAL MULTIMETER

SAFETY INFORMATION

The following safety information must be observed to insure
maximum personal safety during the operation of this meter:
1. Do not use the meter if the meter or test leads look damaged,
or if you suspect that the meter is not operating properly.
2. This meter is not recommended for high voltage industrial
use; for example, not for measurements of 440VAC or
600VAC industrial power mains. The unit is intended for
use with low energy circuits to 1000VDC or 750VAC or high
energy circuits to 250VAC or DC. Accidental misuse by
connection across a high voltage, high energy power source
when the meter is set up for mA measurement may be very
hazardous.
3. Turn off power to the circuit under test before cutting,
unsoldering, or breaking the circuit. Small amounts of
current can be dangerous.
4. Use caution when working above 60VDC or 30VAC rms.
Such voltages pose a shock hazard.
5. When using the probes, keep your fingers behind the finger
guards on the probes.
6. Measuring voltage which exceeds the limits of the
multimeter may damage the meter and expose the operator
to a shock hazard. Always recognize the meter voltage
limits as stated on the front of the meter.
DC VOLTS
Ranges: 400mV, 4V, 40V, 400V, 1000V
Resolution: 100mV
Accuracy: +(0.5% rdg + 1 dgt)
Input Impedance: 10MW
Overload Protection: 1000VDC or 750VAC rms
AC VOLTS
(50Hz - 500Hz)
Ranges: 400mV, 4V, 40V, 400V, 750V
Resolution: 100mV
Accuracy: +(1.5% rdg + 4 dgts) on 400mV to 400V ranges
+(2.0% rdg + 4 dgts) on 750V ranges
Input Impedance: 10MW
Overload Protection: 1000VDC or 750VAC rms
DC CURRENT
Ranges: 40mA, 400mA, 10A
Accuracy: +(1.5% rdg + 1 dgt) on mA range
+(3.0% rdg + 1 dgt) on 10A range
Input Protection: 0.5A / 250V fast blow fuse
10A / 600V fast blow ceramic fuse
AC CURRENT
(50Hz - 500Hz)
Ranges: 40mA, 400mA, 10A
Accuracy: +(2.0% rdg + 4 dgts) on mA range
+(3.5% rdg + 4 dgts) on 10A range
Input Protection: 0.5A / 250V fast blow fuse
10A / 600V fast blow ceramic fuse

SPECIFICATIONS

Display: 3 3/4 digit liquid crystal display (LCD) with a
maximum reading of 3999.
Polarity: Automatic, positive implied, negative polarity
indication.
Overrange: (OL) or (–OL) is displayed.
Zero: Automatic.
Low Battery Indication: The "
+ " is displayed when the
battery voltage drops below the
operating level.
Measurement Rate: 2.5 times per second, nominal.
Operating Environment: 0
O C to 50 O C at <70% relative
humidity.
Storage Temperature: –20
O C to 60 O C, 0 to 80% R.H. with
battery removed from meter.
Accuracy: Stated accuracy at 23
O C +5 O C, <75% relative
humidity.
Power: Single standard 9-volt battery, NEDA 1604, JIS 006P,
IEC 6F22.
Battery Life: 150 hours typical with carbon-zinc.
Dimensions: 200mm (H) x 90mm (W) x 40mm (D).
Weight: Approx. 14 oz. (400g.) including battery.
Accessories: One pair test leads, one spare fuse (installed), 9V
battery (installed) and operating instructions.
RESISTANCE
Ranges: 400W, 4kW, 40kW, 400kW, 4MW, 40MW, 4000MW
Accuracy: +(1.0% rdg + 4 dgts) on 400W range
+(0.8% rdg + 2 dgts) on 4kW to 4MW ranges
+(3.0% rdg + 4 dgts) on 40MW range
+[(5.0% rdg + 10 dgts) + 10 dgts] on 4000MW range
Open Circuit Volts: 0.6VDC
(3.0VDC on
4000MW ranges)
Overload Protection: 500VDC or AC rms
CONTINUITY
Audible Indication: Less than 40W +20W
Overload Protection: 500VDC or AC rms
DIODE TEST
Test Current: 1.0mA +0.6mA
Accuracy: +(3.0% rdg + 3dgt)
Open Circuit Volts: 3.0VDC typical
Overload Protection: 500VDC or AC rms
CAPACITANCE
Ranges: 4nF, 40nF, 400nF, 4mF, 200mF
Accuracy: +(5.0% rdg + 10dgts) on all ranges
+(8.0% rdg + 10dgts) above 100mF
Test Frequency: 200Hz
400W and