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Model DRC-91C/93C
9220 Input Card
for the appropriate input and
2 .
Precision Standard Resistor
-
set
the
standard
to
0.0000
1
kilohms for 9220-P3 or
100
volts.
Adjust the
trimpot
ohms for 9220-P2 and 9220-R1
marked
A M P
z
on
the
with a tolerance of
+/-
0.01% or
calibration cover until the
DVM
better.
reads as close to
0
volts as
possible.
Set the standard to
3.
Precision
Voltage
Source
-
0.2500
volts
and
adjust
the
capable of supplying a voltage
trimpot marked
AMP S
on the
with an accuracy
and
resolution
calibration
cover
until
the
of
10
microvolts out of
1
volt
voltage reads -2.5000 volts.
or better.
4 . C a l i b r a t e
the A/D
Converter-
The unit should be allowed a one
Verify that the Display Sensor
hour warm-up time to achieve rated
is the desired Input Card and
specifications
.
that the units are
ohms.
Set
the standard to 0.2700 volts and
Refer to the
9210
section for the
adjust the trimpot marked
A/D
calibration procedure for the
9220-
until
the display reads
270.00
3
and
9220-6
configurations.
ohms (for the 9220-P3 an input
of
0.2700
volts results in a
Use
the
following procedure to
display of
2700.0
ohms
and for
calibrate the 9220-P2, -P3 and -R1
the 9220-R1 an input of
0.2700
Configurations
.
volts results in a display of
81.00
ohms).
Check linearity by
1 .
Remove
the
three
top
panel
inputting
0.2000
and
0.1000
screws and slide the panel off.
volts and verify that the unit
displays
200.00
and
100.00
ohms
2.
set
100
µA,
1mA,
3mA
Current
within
+/-
0.01
ohms
(or
Connect
t h e
appropriate
equivalent for the 9220-P3 and
precision resistor across the
A
9220-Rl) .
(+I) and B (-1) pins of the five
pin
input
connector
for the
5 .
Install the top panel.
input
(J1 or
J2)
the
9220
occupies.
Connect the DVM plus
lead to the +I pin and the minus
lead to the -I pin.
Adjust the
trimpot marked
1mA
(for -P2) on
Sensor Curve .data for use with the
the
calibration cover
(100µA
9220 RTD
Configurations must be put
for -P3,
3mA
for
-R1)
for the
in table form consisting of voltage
appropriate Input Card until the
and temperature points with the
voltage across the resistor is
voltage in ascending voltage order.
equal
to
the
sensor current
Since the 9220 raw data would be
in
times
the
resistance
±
the
resistance
form,
it
must
be
tolerance of the resistor.
converted prior to entering.
Refer
to Section
4
of this manual for a
3 .
Calibrate
the
Input
-10
discussion of how the data must be
Amplifier -Connect the DVM plus
converted and formatted for entry
and
minus
leads to the
+
V and
into
the unit
Over
the remote
-V Sensor Output Signal pins for
interface and to Appendix B for a
the appropriate Input
C a r d
of
discussion
of
Precision
Option
the
J3
MONITORS
connector.
curves and examples of curves that
Connect the precision voltage
would be used with the
9220.
source across the E(+V) and D(-
V) of J1 INPUT A or J2
INPUT
B
9220.7
SENSOR
CURVE
INFORMATION
COPYRIGHT 12/87 LSCI
9220-3
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