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MODEL 1054B C
SECTION 5.0
START-UP AND CALIBRATION
SECTION 5.0
START-UP AND CALIBRATION
5.1 GENERAL.
Calibration and operation of the Model
1054B should begin only after completion of the con-
figuration of the analyzer. The sensor must be wired
(including J-box and interconnecting cable) as it will
be in operation.
NOTE
READ THE ENTIRE CALIBRATION
SECTION TO DETERMINE THE CALI-
BRATION PLAN MOST SUITABLE
FOR YOUR NEEDS.
5.2 Entering the Cell Constant.
The first time the
analyzer is calibrated and any time there is a sensor
change, the sensor cell constant must be entered into
memory. Entering a cell constant into memory will
reset the cell factor
Fct
to 1.0 and will initiate the ana-
lyzer (the cell factor gives an indication of sensor scal-
ing. Refer to Section 8.2.3).
1.
Enter the Set Mode. Press the
ACCESS
key
twice in rapid succession. The analyzer will dis-
play
SEt
briefly then display
Cin
.
2.
SCROLL
(
é
) the menu until
CEL
is displayed,
then
SELECT
it. The Numerical display will flash
to indicate that a value is desired.
3.
Use
SCROLL
(
é
) and
SHIFT
(
ç
) to display the
correct sensor cell constant and
ENTER
it into
memory. This value can be found on the cable
label (i.e., Sensor K= 1.00).
NOTE
Only adjust the cell constant when the con-
ductivity sensor is replaced or serviced.
Then always perform a restandardization.
See Section 5.5.
5.3 Temperature Calibration.
For accurate tempera-
ture correction, the temperature reading may need
adjusting. The following steps must be performed with
the sensor in the process or in a grab sample. For the
most accurate results, standardization should be per-
formed at or near operating temperature.
1.
Observe the analyzer temperature reading by
pressing the
TEMP
key. Allow the reading to sta-
bilize to insure that the sensor has acclimated to
the process temperature.
2.
Compare the analyzer reading to a calibrated
temperature reading device. If the reading
requires adjusting, proceed to Step 3, otherwise,
go to Section 5.4.
3.
Press the
TEMP
key then the
SELECT
key to
correct the temperature display. The analyzer will
display
AdJ
briefly, then the Numeric Display will
show with digit flashing.
4.
SCROLL
(
é
) and
SHIFT
(
ç
) to display the cor-
rect value and
ENTER
it into memory. Proceed to
Section 5.4.
5.4 Initial Loop Calibration.
Please read the entire
calibration section before proceeding to determine the
best plan to follow.
A. Two Point Calibration
- Standard Method. This is
the recommended procedure for the initial calibration
if the process's temperature slope is unknown. If any
of the steps below are impossible or impractical, refer
to the alternate Section 5.4 B.
1.
Obtain a grab sample of the process to be meas-
ured.
2.
Determine the sample's conductivity using a cali-
brated bench or portable analyzer. The analyzer
must be able to reference the conductivity to
25°C, or the solution must be measured at 25°C.
Note
the reading. Insure that the analyzer is in
hold. Press the
HOLD
key twice and observe the
solid flag.
3.
Immerse the analyzer's sensor into the process
solution. The sensor body must be held away
from the bottom and sides of the sample's con-
tainer and the sensor cable must not be allowed
to contact the solution. Shake the sensor to
ensure that no air bubbles are present.
4.
Adjust the sample's temperature to either the nor-
mal high or normal low temperature of the
process. To raise the sample's temperature, a hot
plate with stirrer is recommended. To lower the
process temperature, place the grab sample's
container in an ice bath or let it slowly cool down.
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