SP 100 LASCAR, SP 100 Datasheet - Page 4

• Manufacturer Part Number: SP 100
• Description: Voltage Meter
• Manufacturer: LASCAR

Specifications of SP 100

• No. Of Digits / Alpha: 3-1/2
• Meter Function: DC Voltmeter
• Meter Range: 0mV To 200mV
• Digit Height: 9.4mm
• Operating Temperature Range: 0°C To +50°C
• Meter Signal Input: Voltage
• Character Size: 0.37"
• No. Of Pins: 12
• Lead Free Status / RoHS Status: na

SP 100
Specifications liable to change without prior warning
SCALING
Two 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.
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.
upply
1
±200mV
+
-
10
12
11
220nF
INH
INL
COM
Measuring supply voltage and current to a load.
V+
0V
7805
1
3
RO
DE
RI
0V
2
8
7
+5V
10uF
470nF
V+
FSR
10
8
7
COM
RO
RI
* Ensure that Ra is rated for high voltage use.
** Ensure solder link LA is cut.
Rs = 200mV
Voltage
Current
V+
0V
Vin
I
in
1
3
INH
INL
DE
www.lascarelectronics.com
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.
12
2
11
I
S
FSR
1
V
A
2000V* 1M**
200mA
±200mV
(e.g. 0.1 / 400mW for 2A full scale)
200 A
20mA
200V
2mA
20V
FSR
Ra=1M
Rb=1k
2V
+
-
SP 100
Shunt
m
Rs
W
910k**
12
11
1M**
1M**
Load
0R
0R
0R
0R
Ra
INH
INL
I
V+
0V
Issue 5
1
3
R
RO
DE
L
RI
100R
100R
100k
0V
10k
10R
2
8
7
Rb
1R
1k
1k
V+
JANUARY/2007
3½ Digit LED Voltmeter Module
current loop
Vin or in
4-20mA
R = 0.2
Measuring current.
The meter's supply is isolated
from the current being measured.
+
-
I
I
R
FSR
Measuring a 4-20mA loop current.
The meter's power supply must be
isolated from the 4-20mA current
loop.
I
I-
+
LA
Ra
R= Reading at 20mA
220k
10
12
11
R
IRCN: 695 - Page 4 of 4
5k
M.C.
Rb
INH
INL
COM
V+
0V
Set Zero
1
3
12
10
11
12
11
RO
DE
160
RI
INL
COM
INH
INH
INL
Applies to SP 100/1
0V
2
8
7
SP 100
V+
0V
1
3
V+
RO
DE
RI
0V
2
8
7
Page 4 of 4
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V+