EMV 1025S-01 Lascar Electronics, EMV 1025S-01 Datasheet - Page 2

• Manufacturer Part Number: EMV 1025S-01
• Description: Voltmeter, Digital; Voltmeter Meter Type; LCD; 0.5 in.; 5 VDC (Typ.)
• Manufacturer: Lascar Electronics
• Type: Voltager

Specifications of EMV 1025S-01

• Accuracy: ±0.1% %
• Connection Type: 3-Wire
• Digit Height: 0.31
• Dimensions: 1.22"L×0.2"W×0.57"H
• Display Digit Height: 0.5 "
• Display Type: LCD
• Function: Voltage
• Meter Type: Voltmeter
• Number Of Digits: 3-1/2
• Primary Type: Electronic
• Range, Measurement: -1999 to 1999
• Temperature, Operating: 0 to +50 °C
• Voltage, Supply: 5 VDC
• Lead Free Status / Rohs Status: RoHS Compliant part

VOLTAGE SCALING
Two resistors Ra and Rb may be added in order
to alter the full scale reading (FSR) of the meter -
see table and diagrams below. The meter may
be re-calibrated by adjusting the calibration
potentiometer at the rear of the module.
CURRENT SCALING
A current shunt Rs may be added in order to
alter the full scale reading (FSR) of the meter -
see table and diagrams below. The meter may
be re-calibrated by adjusting the calibration
potentiometer at the rear of the module.
TERMINAL FUNCTIONS
1.
2.
3.
SAFETY
To comply with the Low Voltage Directive (LVD 93/68/EEC), input voltages to the module’s pins must not exceed 60Vdc. The user must
ensure that the incorporation of the unit into the user ’s equipment conforms to the relevant sections of BS EN 61010 (Safety
Requirements for Electrical Equipment for Measuring, Control and Laboratory Use).
(8-30V)*
Specifications liable to change without prior warning
V
* Consult 7805 voltage regulator manufacturer's datasheet for minimum and maximum allowable input voltage ratings.
Voltage to be
APPLICATIONS
Do not connect more than one meter to the same power supply if the meters cannot use the same signal ground. Do not connect IN HI to a voltage greater than
(V+ - 1V )or to a voltage lower than (-(V+) + 1V) if the meter is unscaled, as this may damage the meter. Keep leads short to ensure noise-free operation. To
maximise measurement accuracy, use high precision (1%), low temperature drift (50ppm/°C or better) scaling resistors (Ra, Rb and Rs).
measured
supply
Red
Black
Yellow
Vin
0V
Ra
V+
GND
IN HI
220nF
Measuring supply voltage and current.
+3.5 to +7.5V d.c.
Rb
IN HI
7805
Positive power supply connection.
Negative power supply connection.
Positive measuring input with reference to GND.
Measuring a single ended input
referenced to supply.
TEL: [phone] FAX: [phone]
470nF
MODULE HOUSE, WHITEPARISH,
LASCAR ELECTRONICS LTD.
+5V
E-MAIL: [e-mail]
WILTSHIRE SP5 2SJ
V+
GND
UK
V+
GND
Supply Voltage
V+
0V
EMV 1025S-X X
Required V
2V*
20V*
200V*
Required I
200uA
2mA
20mA
200mA
2A
20A
200A
IN HI
S
1
FSR
(8-30V)*
TEL: [phone] FAX: [phone]
FSR
A
V
V
supply
E-MAIL: [e-mail]
Issue 6
Ra=1M
Rb=8k
R
CAL
Shunt
LASCAR ELECTRONICS INC.
Rs
=5k
3750 WEST 26th STREET,
100m
10m
910k
100
Load
ERIE, PA 16506
1M
1M
1m
1k
10
1
Ra
Rs
I
W
W**
W
W
W
W
W**
W
W
USA
W
220nF
R
L
7805
P
The module shown is an EMV 1025S-0 2
S selects between voltage and current measurement
Voltage:
Current: Rs = 200mV
Calibration:
First calibrate the current range, by adjusting the meter's own calibration
potentiometer. Then calibrate the voltage range, by adjusting the R
potentiometer.
1
(Power Rating)
0.04mW
400mW
0.4mW
100k
40mW
10k
4mW
40W
1k
4W
470nF
Rb
Measuring current.
W
W
W
+5V
IRCN 0539
Ra, Rb and Rcal scale the module for 20V
GND
HOW MING STREET, KWUN TONG, KOWLOON,
UNIT NOS. 6-8, 19/F FUTURA PLAZA, 111-113
I
TEL: [phone] FAX: [phone]
FSR
LASCAR ELECTRONICS (HK) LIMITED
* Subject to a minimum order quantity of 50
pcs., pre-scaled modules are available from
Lascar. See stock number table on the front of
this datasheet. Customer-specific scaling options
may also be available on request. Contact Lascar
sales office for details.
** We recommend that purpose made shunts
are used for these ranges.
E-MAIL:
M.C.
(e.g. 10m
Rs
V+
[e-mail]
IN HI
Rs = V
W
HONG KONG
Applies to EMV 1025S/1
/ 4W for
FSR
I
FSR
I
54
=20A)
Load
I
FSR
CAL