IM CA71-E
10-3
Method of Calibrator Adjustment
10
10.2 Adjusting Source Functions
10.2 Adjusting Source Functions
Table 10.1 Adjustment Points of Source Functions
100 mV
1 V
10 V
30 V
20 mA
20 mA SINK
400
Ω
/1 mA
400
Ω
/5 mA
100 mV
1 V
10 V
30 V
20 mA
20 mA
400
Ω
400
Ω
0
0
0
0
0
0.1 mA
0
0
Range
Adjustment Points
*1
CAL FS
CAL 0
Remarks
See the figure below.
See the figure below.
Four-wire connection
See the figure below.
*1: Adjust the source functions so that the readings of the calibration standard
(output values of the CA51/71) match the adjustment points listed above.
TIP
• You can also select only the range in need of readjustment to adjust it separately.
• Always make zero-point (0) adjustments together with full-scale (FS) adjustments.
CA71
24V
20mA
20 mA output
SINK
SINK
H
L
Power
supply
H
L
DMM
Voltage range
CA71
5mA
H
L
High-precision
current source
Standard resistor
100
Ω
20 mA and SINK ranges
400
Ω
/5mA
DMM
Voltage range
Hook-ups for Adjustment
Step 1: Press the
key while simultaneously holding down the
key. The LCD shows
.
Step 2: Pressing the
key enters the source CAL mode. The
indicator blinks on the LCD and the
symbol ap-
pears. The calibrator is now ready for the zero-point adjust-
ment of source functions.
Step 3: From Table 10.1, select the range you want to adjust. Then,
point the function selector switch to that range and press the
key.
