OEM 1B-LED LASCAR, OEM 1B-LED Datasheet - Page 4

• Manufacturer Part Number: OEM 1B-LED
• Description: Voltage Meter
• Manufacturer: LASCAR

Specifications of OEM 1B-LED

• No. Of Digits / Alpha: 3-1/2
• Meter Function: DC Voltmeter
• Meter Range: 0mV To 200mV
• Digit Height: 8mm
• Operating Temperature Range: 0°C To +50°C
• Meter Signal Input: Voltage
• Character Size: 0.31"
• Height: 0.65"
• Accuracy: +/- (0.1% Of Input +/- 1 Count)
• Rohs Compliant: NA
• Lead Free Status / RoHS Status: na

OEM 1B-LED
Specifications liable to change without prior warning
EXTERNAL SCALING
Two external resistors Ra and
Rb may be used to alter the
full scale reading (FSR) of the
meter - see table. The meter
will have to be re-calibrated
by adjusting the calibration
potentiometer on the rear of
the module.
APPLICATIONS
Do not connect more than one meter to the same power supply if the meters cannot use the same signal
ground. Taking any input beyond the power supply rails will damage the meter.
Measuring an input voltage referenced
to a floating supply, i.e. the input
voltage and the meter's power supply
are isolated from each other.
Circuit shows DP1 enabled.
V
S selects between voltage and current measurement.
Ra and Rb shown scaled for 200V
Display DP1, DP2 or DP3, by connecting to 0V, as required.
supply
1
±200mV
+
-
IHI
ILO
COM
Measuring supply voltage and current to a load.
V+
0V
DP1
+4.75 to +5.25V
+5V
FSR
0V
COM
Rs = 200mV
Voltage
Current
V+
0V
Vin
Iin
ILO
IHI
Measuring a single ended input
voltage referenced to supply, i.e. the
input voltage and the meter's power
supply share the same 0V rail.
www.lascarelectronics.com
I
S
FSR
1
±200mV
V
A
2000V*
200mA
+
200 A
20mA
-
200V
2mA
20V
FSR
OEM 1B-LED
2V
a=1M
b=1k
Shunt
Rs
IHI
ILO
910k
Load
1M
1M
1M
0R
0R
0R
0R
Ra
V+
0V
I
R
Issue 3
L
0V
+4.75 to +5.25V
100k
100R
100R
10k
10R
Rb
1R
1k
1k
January/2007
current loop
4-20mA
3½ Digit LED Voltmeter Module
R = 0.2
Measuring current.
The meter's supply is isolated
from the current being measured.
+
-
Measuring a 4-20mA loop current.
The meter's power supply must be
isolated from the 4-20mA current
loop.
I
I-
I
I
+
R
54
R= Reading at 20mA
220k
R
M.C.
5k
IHI
ILO
COM
No.: 695 - Page 4 of 4
Set Zero
Applies to OEM 1B-LED/1
160
V+
0V
ILO
COM
IHI
V+
0V
0V
+4.75 to +5.25V
+4.75 to +5.25V
0V