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ES238 Datenblatt(PDF) 7 Page - Cyrustek corporation

Teilenummer ES238
Bauteilbeschribung  6000 Counts DMM / Peak
Download  37 Pages
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Hersteller  CYRUSTEK [Cyrustek corporation]
Direct Link  http://www.cyrustek.com.tw
Logo CYRUSTEK - Cyrustek corporation

ES238 Datenblatt(HTML) 7 Page - Cyrustek corporation

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V 2.2
7
2015/12/15
ES238
6000 Counts DMM / Peak
Function Description
1. Operating Modes
1.1.
Semi-auto calibration scheme
ES238 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.
ES238 provide another calibration scheme and the most variable resistors could be ignored. When ES238 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 1 sec. simultaneously to save the digital control code to external EEPROM (24C02).
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
6.000V (DC/AC separated)
Accuracy of other ranges is guaranteed
by external resistor.
mV Voltage Measurement
600.0mV (DC/AC separated)
DC Current Measurement For
Multimeter (uA/mA)
600.0μA or 6000μA
( 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)
600.0μA or 6000μA
( 2 modes choose one for calibration )
Auto 2 ranges separated for calibration
is necessary.
DC Current Measurement For
Multimeter (A)
6A or 20A
Auto 2 ranges choose one, proposed to
use a large range to calibration.
AC Current Measurement For
Multimeter (A)
6A or 20A
Auto
2
ranges
individual
for
calibration is necessary.
DC Current Measurement For
Clampmeter
600.0A or 6000A
( 6 modes choose one for calibration )
Auto 2 ranges choose one, proposed to
use a large range to calibration.
AC Current Measurement For
Clampmeter
600.0A or 6000A
( 6 modes choose one for calibration )
Auto 2 ranges separated for calibration
is necessary.
Capacitor Measurement
60.00nF
Temperature Measurement
600.0℃
Lower range in auto temperature
measurement.
ADP Measurement
6000 / 600.0 / 60.00 / 6.000
4 ranges separated for calibration.
After calibration procedure is finished, set ES238 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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