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ES233 数据表(PDF) 7 Page - Cyrustek corporation

部件名 ES233
功能描述  4000 Counts DMM
Download  37 Pages
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制造商  CYRUSTEK [Cyrustek corporation]
网页  http://www.cyrustek.com.tw
标志 CYRUSTEK - Cyrustek corporation

ES233 数据表(HTML) 7 Page - Cyrustek corporation

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V 2.2
7
2015/12/15
ES233
4000 Counts DMM
Function Description
1. Operating Modes
1.1.
Semi-auto calibration scheme
ES233 includes DMM & Clamp-on meter features in single chip. DMM manufacturers need the calibration
process in production. The traditional solution needs the variable resistors for calibration by manual adjustment.
ES233 provide another calibration scheme and the most variable resistors could be ignored. When ES233 is at
OFF-state, pull CALENP (pin 51) to V- to active the calibration scheme after re-power on. A digital controlled
voltage output will be active from DACO. When semi-auto calibration scheme is active, use HOLD (or
BKLIT) key to decrease voltage and use RANGE (or MMX) key to increase the voltage. Decrease the
reference voltage means the counts on display will be increased. Increase the reference voltage means the
counts on display will be decreased. The adjustment step is approximate one count. If coarse adjustment is
required, push HOLD (or BKLIT) and RANGE (or MMX) larger than one second to speed up to
approximate 10 counts per second. After calibration process is finished, push HOLD (or BKLIT) and
RANGE (or MMX) less than 1sec. simultaneously to save the digital control code to external EEPROM
(24LC02).
The semi-auto calibration scheme supports the following nine measurement modes. When CALENP pin is
active, set the proper function switches or push KEY to choose the target measurement mode. When mode is
selected, the LCD segment of Unit at related measurement will be blinking.
Mode
Default Range For CAL
Remark
Voltage Measurement
4.000V (DC/AC separated)
Accuracy of other ranges is guaranteed
by external resistor.
mV Voltage Measurement
400.0mV (DC/AC separated)
DC Current Measurement For
Multimeter (uA/mA)
400.0μA or 4000μA
( 2 modes choose one for calibration )
Auto 2 ranges choose one, proposed to
use a large range to calibration.
AC Current Measurement For
Multimeter (uA/mA)
400.0μA or 4000μA
( 2 modes choose one for calibration )
Auto 2 ranges separated for calibration
is necessary.
DC Current Measurement For
Multimeter (A)
4A or 20A
Auto 2 ranges choose one, proposed to
use a large range to calibration.
AC Current Measurement For
Multimeter (A)
4A or 20A
Auto
2
ranges
individual
for
calibration is necessary.
DC Current Measurement For
Clampmeter
400.0A or 4000A
( 6 modes choose one for calibration )
Auto 2 ranges choose one, proposed to
use a large range to calibration.
AC Current Measurement For
Clampmeter
400.0A or 4000A
( 6 modes choose one for calibration )
Auto 2 ranges separated for calibration
is necessary.
Capacitor Measurement
40.00nF
Temperature Measurement
400.0℃
Lower range in auto temperature
measurement.
ADP Measurement
4000 / 400.0 / 40.00 / 4.000
4 ranges separated for calibration.
After calibration procedure is finished, set ES233 to OFF-state and set CALENP (pin51) to DGND or kept
floating to return to normal mode operation after re-power on.


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