Martel Electronics V600 - Manual (Page 4)

Specifications liable to change without prior warning V 600 Issue 2 November/2001 M.C. Applies to V 600/2
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
meter will have to be re-
calibrated by adjusting the
calibration potentiometer
on the rear of the module.
+
-
Ra
Rb
INHI
Vin or in I
INLO
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
µ
Voltage
Current
*Ensure that Ra is rated for high voltage use.
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.
V 600
3½ Digit LCD Voltmeter Module
0V 0V
+7 to +12V
+3.5 to +6.0V
-3.5 to -6.0V
+7 to +12V
VDD
VDD
VDD
IN HI
IN HI
IN HI
IN LO
IN LO
IN LO
COM
COM
COM
ROL
ROL
ROL ROH
ROH
ROH
RFL
RFL
RFL RFH
RFH
RFH
15
15
15
13
13
13
11
11
11
V 600
V 600
V 600
VSS
VSS
VSS
12
12
12 DP3
DP3
DP3
5
5
5
8
8
8
7
7
7 6
6
6
10
10
10 9
9
9
±200mV
±200mV
+
+
I+
I- -
-
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.
Measuring a single ended input referenced to supply, i.e.
the input voltage and the meter's power supply share the
same 0V rail.
Measuring a current referenced to a floating supply, i.e. the
current being measured and the meter's power supply are
isolated from each other.
Driving the Battery annunciator with associated external logic
and low battery detection circuitry.
4070
V+
V-
VDD BP
LO BAT
TEST
15
1
11
V 600
VSS
2
14
1M
470k
1M
SET
THRESHOLD
BC 237
Normally
SHORTED
Cut to
OPEN
Normally
OPEN
Solder to
SHORT