Ver 1.2
23
22/02/24
ES269
6000 Counts Intelligent Auto-Function DMM IC
Calibration Scheme
DMM manufacturers need the calibration process in production. The traditional solution needs the
variable resistors for calibration by manual adjustment. ES269 provide another calibration scheme and
the most variable resistors could be ignored. When ES269 is at OFF-state, pull CALen (pin 88) to V- to
active the calibration scheme after re-power on. When calibration scheme is active, the LCD segment
of Unit of related measurement will be blinking.
The calibration steps are as follows:
1.
Press SEL key to select a measurement, and then input the reference value according to Table 15.
2.
Press HOLD or MMX to start the calibration process.
3.
The calibration parameter is automatically stored
8
to external EEPROM for measurement mode.
And the buzzer will announce a beep.
4.
Repeat the process until all calibrations are complete.
Table 15. Calibration parameters
Terminal
Default Range
For CAL
Reference
input
Remark
DCV
VR1
6.000V
5.800V
All range of DCV is the
same parameter
ACV
VR1
6.000V
5.800V
All range of ACV is the
same parameter
DCA
mAin
600.0mA
580.0mA
All range of mA
DC
is the
same parameter
Ain
20.00A for
multimeter
18.00A
All range of A
DC
is the same
parameter
600.0A for clamp
meter
580.0A
ACA
mAin
600.0mA
580.0mA
All range of mA
AC
is the
same parameter
Ain
20.00A for
multimeter
18.00A
All range of A
AC
is the same
parameter
600.0A for clamp
meter
580.0A
Capacitance VR1
60.00nF
58.00nF
6nF-6uF is the same
parameter.
Capacitance VR1
60.00uF
58.00uF
60uF-60mF is the same
parameter
After calibration procedure is finished, set ES269 to OFF-state and set CALen (pin88) to AGND or
kept floating to return to normal mode operation after re-power on.
8
In manual adjustment mode, press the HOLD key and the BKLIT key simultaneously to store the
value in the external EEPROM.
