IM 12D03D02-01E
4-9
4
.
Keypad and Display Functions
The cell constant can be set in the range ±20% of standard cell constant. For
example, for general-purpose sensors with standard cell constant of 5 cm
-1
, a cell
constant ranging from 4.00 to 6.00 can be set.
Once the cell constant is set, it remains stored in memory even when batteries are
removed.
The general-purpose cell has the same cell constant whether used with SC72-21 or
SC72-23 type.
Refer to Sec. 2.4 for cell constant setting procedure.
Use key to set
the cell constant. Then press
the key to complete setting.
F/ENT
F/ENT
(5) Calibration with standard solution (CAL) panel
This panel is used for calibration with standard solution. Refer to Sec. 5.4 for a
description of the calibration procedure. In CAL mode, the
mark appears at
the top of the panel and all digits of the present measurement value flash.
After the measurement stabilizes, press the
F/ENT
key to display the measured
value at that time. Only the least significant digit flashes. Use the
keys to set
the desired calibration value, then press the
F/ENT
key to complete the calibration.
The meter internal cell constant is changed after completing calibration with standard
solution. Referring to (4) cell constant setting (C.C) panel, confirm the updated cell
constant value and rewrite the cell constant (refer to the value on the plate attached to
the sensor cable. Rewritten cell constants remain even if batteries are removed.
To abort calibration using standard solution, press the
MEAS
key to return to
measurement mode.
All digits of measurement
value are flashing
Least significant digit is flashing
Press the key to complete calibration.
F/ENT
F/ENT
F/ENT
