18
G.
Conductivity/Resistivity Calibration mode
The model 3331 uses 1-point calibration for conductivity or resistivity.
In the
Measure mode
, pressing
[UP]
key and
[ENTER]
key at the same time to allow
the meter to go to the
Conductivity / Resistivity calibration mode
.
At the
Conductivity / Resistivity calibration mode
, the “
CAL
” icon and a
conductivity/resistivity reading will display. Rinse the conductivity probe in distilled
water and immerse it into the standization solution. Allow temperature reading to
stabilize, press
[UP]
key or
[DOWN]
key to change this reading to that of the
standization solution value, then press
[ENTER]
key to save. Calibration is now
completed.
H.
4-20 mA output
1.
Isolation voltage:
The maximum isolation voltage of the 4-20mA output contacts is 500 VDC. The
voltage differential between the 4-20mA output contacts and the load should not
exceed 500 VDC.
