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• When performing the second calibration point, it is pos-
sible to choose between two values, 25 °C and 50 °C .
Pressing the
or
key the value on the secondary LCD
will switch between the two possibilities .
• Once selected the value, immerse the temperature probe
in the second beaker as near as possible to the Check-
temp and the calibration procedure will be the same as
for the first point .
VOLT CALIBRATION
The instrument is factory calibrated; however the user may
also perform the Volt calibration, which is a procedure
available for the meter configured as pH controller only .
During pH measurements the instrument reads a mV value
from the electrode and then converts it into a pH value .
• Set item I .04 to “OFF” to disable the Matching Pin .
• Connect a
HI931001
or
HI8427
simulator to the BNC
socket .
• Once entered the calibration
mode, move through the menu
with
or
key, select the Volt
calibration (the primary LCD shows
“UOLt” message) and confirm it by
pressing the CFM key .
• After confirmation the primary LCD
will show the actual mV value and
the secondary LCD will display the
first calibration point .
• The calibration is performed over two points, 0 and
350 mV .
• Set the
HI931001
or
HI8427
simulator to 0 mV .
• When the reading becomes stable, if the measured value
is close to the calibration point the CFM tag starts blinking,
otherwise the WRONG indicator will flash .
Содержание HI 504
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