JENCO 6230M Operation manual - The Keypad (
5
THE KEYPAD (
See Notes 2 and 3
)
1. ON/OFF key:
The ON/OFF key turns the unit ON or OFF. The pH calibration values will not
be erased when the unit is turned off.
2. MODE key:
2.1. During normal operation, the MODE key will change the display mode
sequentially to pH-AUTOLOCK, mV-AUTOLOCK, pH, mV, RECALL
and ERASE. The calibration values will not be affected by changing the
display modes.
2.2. In pH calibration mode, the MODE key will exit the current calibration and
go to the measurement.
3. STAND and SLOPE keys:
3.1 The STAND and SLOPE keys are used for pH calibration of the instrument.
3.2 Press and hold the STAND key while turning on the power to change the
buffer set.
4. △ (UP) and ▽ (DOWN) keys:
4.1 The △ and ▽ keys are used to manually enter the temperature value in
manual (MAN) mode. These keys are inoperative when operating in ATC
mode.
4.2 In RECALL mode, the △ and ▽ keys will adjust the site number .
5. MEASURE key:
5.1 The MEASURE key is used to bring the instrument out of the
AUTOLOCK condition when operating in the pH-AUTOLOCK or
mV-AUTOLOCK mode.
5.2 During pH-AUTOLOCK, mV-AUTOLOCK, pH,or mV mode, pressing
and holding the MEASURE key for about 2 seconds will save all the
readings in the next available site number.
5.3 During RECALL mode, pressing the MEASURE key will display the
saved pH value and temperature value on the current site. Then pressing it
again will display the mV value and temperature value on the same site.
Press the MEASURE key one more time will go to the pH value and
temperature value.
6. CLEAR key:
During pH-AUTOLOCK and pH mode, the CLEAR key is used to clear all pH
calibration values stored in the internal memory and set them to default (ideal)
values. Under normal conditions, it will not be activated unless press and hold
this key for about 2 seconds. By doing this, the unit is ready for measurements
with STAND and SLOPE off and need not to be calibrated.