marposs P3UP - Adjusting Measurement Sensitivity

Installation and User Manual
47
The number of wires used must be the same as the number of analogue outputs that are effectively in use:
One wire for the analogue output and one wire for the corresponding return signal. The cross section of the
wires must be at least 0.08 mm
2
.
PIN SIGNAL DESCRIPTION NOTES
A
GNDA
“In-Process Measurement” analogue output return signal (pin
H)
D
GNDA
“T1” analogue output return signal (pin J)
E
GNDA
“T2” analogue output return signal (pin K)
G
GNDA
“VREF” analogue output return signal (pin F)
H
MEASUREMENT
Analogue measurement output with standard sensitivity
depending on the analogue instrument:
 50-0-10 instrument: 20mV/um
 10-0-2 instrument: 100mV/um

100-0-20 instrument: 10mV/um
C
MEASUREMENT
AMPLIFICATION
It is possible to increase the sensitivity of the analogue
measurement output by connecting an external resistance
B
MEASUREMENT
ATTENUATION
It is possible to reduce the sensitivity of the analogue
measurement output by connecting an external resistance
J
T1
Sensitivity fixed at 10mV/um
K
T2
Sensitivity fixed at 10mV/um
F
VREF
10V d.c.
To amplify the measurement sensitivity
:
both Snew the desired sensitivity in mV/μm, and S the standard sensitivity of the device, solder a resistor
having a value given by the formula indicated below between pins C and A of the analogue output
connector:
E.g.: if the desired sensitivity is 60mV/μm and the current sensitivity is 20mV/μm (i.e. when using a device
with a 50-0-10 instrument) the value of the resistance R= 5KΩ
Whereas, to reduce the measurement sensitivity
:
both Snew the desired sensitivity in mV/μm, and S the standard sensitivity of the device, solder a resistor
having a value given by the formula indicated below between pins B and A of the analogue output
connector:
E.g.: if the desired sensitivity is10mV/μm and the current sensitivity is 20mV/μm (i.e. when using a device
with a 50-0-10 instrument) the value of the resistance R= 10KΩ
In both cases
we recommend using a 0.1% tolerance resistor with a temperature coefficient ≤ 25ppm/°C.
[
N.B.
The resistor must be mounted inside the connector and as close as possible to the pins.






−
=
1
10
S
Snew
K
Ω
R






−
=
1
10
Snew
S
KΩ
R