Instruction manual

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MODEL 5081-C SECTION 6.0
START-UP AND CALIBRATION
6.2 CALIBRATE MENU
To access the “Calibrate” menu, press the CAL key on the
infrared Remote Control. if security has been enabled, the
secondary process display will be replaced with a prompt
asking for the “id”. u sing the iRC editing keys, enter the
“id”. if the correct “id” is entered, the CALibrAtE sub-
menu will appear when ENTER is pressed.
if the CALibrAtE sub-menu does not appear when
ENTER is pressed, see Section 4.4 (step 8) for procedure
to find correct code.
6.2.1 Calibrate
1. With the sensor in a standard solution of known con-
ductivity value, allow the temperature of the sensor to
stabilize (10 min).
2. To access the CALIbrAtE menu, press the CAL button
on the iRC.
3. Press ENTER to access the CAL segment with flashing prompt.
4. u se the iRC editing keys to indicate the conductivity values of the standard solution on the screen.
5. Press ENTER then EXiT to enter the standard solution value and return to the main screen.
6.2.2 Sensor 0
From the main screen, press CAL, then press NEXT to enter the SEnSOr 0 menu. Press ENTER to access the SEnSOr
0 sub-menu. With the sensor attached and in air, press ENTER again to zero the sensor. Press EXiT to return to the
SEnSOr 0 sub-menu.
6.2.3 Temp Adj
1. Press NEXT and then ENTER to access the tEMP sub-menu with flashing prompt. With the sensor in any solution of
known temperature, allow the temperature of the sensor to stabilize. u se the editing keys of the iRC to change the dis-
played value as needed.
2. Press ENTER to standardize the temperature reading and return to the tEMP Adj screen.
6.2.4 Mtr Cal
For maximum accuracy, calibrate the sensor in the process. This is labeled Mtr CAL on the 5081C and should be done
after the initial transmitter calibration and periodically thereafter as required.
To access Mtr CAL from the main screen, press CAL, then NEXT three times. Refer to Section 6.4 for the procedure.
o n-line calibration is well-suited for most conductivity measurements except ultra pure conductivity and resistivity measure-
ments. These special applications require specialized tools to perform an accurate on-line comparison. A certified conductiv-
ity instrument with a certified flow-through conductivity cell, like the Rosemount Portable Validation instrument, can be used
for this purpose.
6.2.5 Cell Constant
1. When the CALibrAtE sub-menu has been accessed, press NEXT four (4) times and then ENTER to access the CELL
COnSt menu segment with the flashing cell constant prompt.
2. u sing the arrow keys on the iRC, enter your sensor’s cell constant as indicated on the sensor’s tag or specification
sheet.
3. Press ENTER to save the cell constant into the transmitter memory and return to the CELL COnSt sub-menu.
Model 5081-C-HT Model 5081-C-FF
CALIbrAtE CALIbrAtE
SenSor 0 SenSor 0
temp adj temp adj
mtr Cal mtr Cal
Cell COnst Cell COnst
Temp slope Temp slope
Output Cal