Em32-1b, Round hole mounting lcd voltmeter, Scaling – Martel Electronics EM32-1B User Manual
Page 4: Applications, 5v supply operation, 9v supply operation
4
Martel Electronics Corporation
EM32-1B
Page 4 of 4
Page 4 of 4
SCALING
Two resistors Ra and Rb
may be used to alter the
full scale reading (FSR) of
the meter - see table. The
track across Ra must be cut
for on-board scaling. The
meter will have to be re-
calibrated by adjusting the
calibration potentiometer
on the rear of the module.
FSR
Ra
Rb
2V
910k
100k
20V
1M
10k
Vin
200V
1M
1k
2000V*
1M
100R
200 A
0R
1k
2mA
0R
100R
Iin
20mA
0R
10R
200mA
0R
1R
�
Voltage
Current
+
-
Ra
Rb
IHI
Vin or in
I
ILO
EM32-1B
*Ensure that Ra is rated for high voltage use.
Must use external scaling resistors (Do not cut track across Ra).
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.
www.lascarelectronics.com
EM32-1B
Round Hole Mounting LCD Voltmeter
5V supply operation
(3.5 to 6.5V Meter Power Supply)
9V supply operation
(7.5 to 14.0V Meter Power Supply)
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.
Ensure jumper link J1 is not fitted.
Ensure jumper link J2 is not fitted.
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.
Ensure jumper link J1 is not fitted.
Ensure jumper link J2 is fitted.
Measuring a current from a circuit which is
floating with respect to the meter's supply,
i.e. the current and the meter's power
supply are isolated from each other.
Ensure jumper link J1 is fitted.
Ensure jumper link J2 is not fitted.
Measuring a current from a circuit which is
floating with respect to the meter's supply,
i.e. the current and the meter's power
supply are isolated from each other.
Ensure jumper link J1 is fitted.
Ensure jumper link J2 is not fitted.
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.
Ensure jumper link J1 is fitted.
Ensure jumper link J2 is not fitted.
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.
Ensure jumper link J1 is fitted.
Ensure jumper link J2 is not fitted.
+3.5 to +6.5V
V+
IHI
ILO
0V
+
-
±200mV
0V
+7.5 to +14.0V
V+
IHI
ILO
0V
+
-
±200mV
0V
+3.5 to +6.5V
+7.5 to +14.0V
V+
V+
IHI
IHI
ILO
ILO
0V
0V
0V
0V
Rb
Rb
I
+
I
+
I-
I-
+3.5 to +6.5V
V+
IHI
ILO
0V
+
-
±200mV
0V
+3.75 to +7.0V
-3.75 to -7.0V
V+
IHI
ILO
0V
+
-
±200mV
L1 =
L1 =
Specifications liable to change without prior warning
EM32-1B
Issue 3
August/2004
R.C.
Applies to EM32-1B/2
0
V
V
+
IH
I
IL
O
J2
L1
J1
RB
RA
Cut track across Ra
for on-board scaling
Page 4 of 4
Page 4 of 4
SCALING
Two resistors Ra and Rb
may be used to alter the
full scale reading (FSR) of
the meter - see table. The
track across Ra must be cut
for on-board scaling. The
meter will have to be re-
calibrated by adjusting the
calibration potentiometer
on the rear of the module.
FSR
Ra
Rb
2V
910k
100k
20V
1M
10k
Vin
200V
1M
1k
2000V*
1M
100R
200 A
0R
1k
2mA
0R
100R
Iin
20mA
0R
10R
200mA
0R
1R
�
Voltage
Current
+
-
Ra
Rb
IHI
Vin or in
I
ILO
EM32-1B
*Ensure that Ra is rated for high voltage use.
Must use external scaling resistors (Do not cut track across Ra).
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.
www.lascarelectronics.com
EM32-1B
Round Hole Mounting LCD Voltmeter
5V supply operation
(3.5 to 6.5V Meter Power Supply)
9V supply operation
(7.5 to 14.0V Meter Power Supply)
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.
Ensure jumper link J1 is not fitted.
Ensure jumper link J2 is not fitted.
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.
Ensure jumper link J1 is not fitted.
Ensure jumper link J2 is fitted.
Measuring a current from a circuit which is
floating with respect to the meter's supply,
i.e. the current and the meter's power
supply are isolated from each other.
Ensure jumper link J1 is fitted.
Ensure jumper link J2 is not fitted.
Measuring a current from a circuit which is
floating with respect to the meter's supply,
i.e. the current and the meter's power
supply are isolated from each other.
Ensure jumper link J1 is fitted.
Ensure jumper link J2 is not fitted.
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.
Ensure jumper link J1 is fitted.
Ensure jumper link J2 is not fitted.
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.
Ensure jumper link J1 is fitted.
Ensure jumper link J2 is not fitted.
+3.5 to +6.5V
V+
IHI
ILO
0V
+
-
±200mV
0V
+7.5 to +14.0V
V+
IHI
ILO
0V
+
-
±200mV
0V
+3.5 to +6.5V
+7.5 to +14.0V
V+
V+
IHI
IHI
ILO
ILO
0V
0V
0V
0V
Rb
Rb
I
+
I
+
I-
I-
+3.5 to +6.5V
V+
IHI
ILO
0V
+
-
±200mV
0V
+3.75 to +7.0V
-3.75 to -7.0V
V+
IHI
ILO
0V
+
-
±200mV
L1 =
L1 =
Specifications liable to change without prior warning
EM32-1B
Issue 3
August/2004
R.C.
Applies to EM32-1B/2
0
V
V
+
IH
I
IL
O
J2
L1
J1
RB
RA
Cut track across Ra
for on-board scaling
Page 4 of 4
Page 4 of 4
SCALING
Two resistors Ra and Rb
may be used to alter the
full scale reading (FSR) of
the meter - see table. The
track across Ra must be cut
for on-board scaling. The
meter will have to be re-
calibrated by adjusting the
calibration potentiometer
on the rear of the module.
FSR
Ra
Rb
2V
910k
100k
20V
1M
10k
Vin
200V
1M
1k
2000V*
1M
100R
200 A
0R
1k
2mA
0R
100R
Iin
20mA
0R
10R
200mA
0R
1R
�
Voltage
Current
+
-
Ra
Rb
IHI
Vin or in
I
ILO
EM32-1B
*Ensure that Ra is rated for high voltage use.
Must use external scaling resistors (Do not cut track across Ra).
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.
www.lascarelectronics.com
EM32-1B
Round Hole Mounting LCD Voltmeter
5V supply operation
(3.5 to 6.5V Meter Power Supply)
9V supply operation
(7.5 to 14.0V Meter Power Supply)
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.
Ensure jumper link J1 is not fitted.
Ensure jumper link J2 is not fitted.
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.
Ensure jumper link J1 is not fitted.
Ensure jumper link J2 is fitted.
Measuring a current from a circuit which is
floating with respect to the meter's supply,
i.e. the current and the meter's power
supply are isolated from each other.
Ensure jumper link J1 is fitted.
Ensure jumper link J2 is not fitted.
Measuring a current from a circuit which is
floating with respect to the meter's supply,
i.e. the current and the meter's power
supply are isolated from each other.
Ensure jumper link J1 is fitted.
Ensure jumper link J2 is not fitted.
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.
Ensure jumper link J1 is fitted.
Ensure jumper link J2 is not fitted.
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.
Ensure jumper link J1 is fitted.
Ensure jumper link J2 is not fitted.
+3.5 to +6.5V
V+
IHI
ILO
0V
+
-
±200mV
0V
+7.5 to +14.0V
V+
IHI
ILO
0V
+
-
±200mV
0V
+3.5 to +6.5V
+7.5 to +14.0V
V+
V+
IHI
IHI
ILO
ILO
0V
0V
0V
0V
Rb
Rb
I
+
I
+
I-
I-
+3.5 to +6.5V
V+
IHI
ILO
0V
+
-
±200mV
0V
+3.75 to +7.0V
-3.75 to -7.0V
V+
IHI
ILO
0V
+
-
±200mV
L1 =
L1 =
Specifications liable to change without prior warning
EM32-1B
Issue 3
August/2004
R.C.
Applies to EM32-1B/2
0
V
V
+
IH
I
IL
O
J2
L1
J1
RB
RA
Cut track across Ra
for on-board scaling