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Aux TC Zero” menu items.
13. Set the High Temp, Process, and Aux thermocouples to a
known reference temperature using a dry block or other
calibrated reference. The reference temperature should be at
least 20C above the ambient temperature and preferably close
to the maximum planned operating temperature.
14. “Cal Proc TC Span” will show on the display.
15. Use the Up and Down Keys to adjust the temperature
displayed on the PF2100 to match the temperature being
applied to the thermocouple. Note that multiple key presses
may be required before the temperature value on the display
changes. This is because each key press is adjusting a
fractional multiplication factor internal to the system.
16. Press OK and the message “Parameter Saved” will show on
the display briefly.
1 7. Press the Menu Key to go to the next item.
18. Repeat steps 15-17 for the “Cal HiTemp TC Span” and “Cal
Aux TC Span” menu items.
19. Press and hold the OK key for 3 seconds until the message
“Password Logout” is displayed on the screen. The Calibration
Menu is now hidden again.
NOTE: If using a dry block for calibration, make sure that the thermocouple is removed from the bath
and inserted into the dry block long enough for the temperature reading to settle before executing the
calibration. If a process calibrator is used, ensure that the thermocouple wire is inserted directly into
the process calibrator to avoid extra sources of error and be aware that the length of wire within the
thermocouple will not be accounted for, resulting in a less accurate calibration result.
CALIBRATING THE 4-20MA OUTPUT
For the 4-20mA Output, the first calibration point is 4mA and the second calibration point is 20mA. You
will need a current meter capable of measuring current to 0.1mA accuracy.
1. Make sure that the system is stopped.
2. Connect a current meter in series with the 4-20mA Output.
3. Set the current meter to a range setting that covers both 4mA
and 20mA.
4. Press the UP and Down Keys simultaneously to unlock the
Calibration Menu (Menu 7) which is normally hidden.
5. Press the Menu Key repeatedly until Menu 7 is shown.
6. Press OK. If prompted, enter the L2 Password:
7. Press the Menu Key repeatedly until “Cal 4-20 Out Zero” is
shown on the display.
8. Use the Up and Down Keys to adjust the output current until
the current meter reads 4.0mA.
9. Press OK and the message “Parameter Saved” will show on
the display briefly.
10. Press the Menu Key repeatedly until “Cal 4-20 Out Span” is
shown on the display.
11. Use the Up and Down Keys to adjust the output current until
the current meter reads 20.0mA.
12. Press OK and the message “Parameter Saved” will show on
the display briefly.
13. Press and hold the OK key for 3 seconds until the message
“Password Logout” is displayed on the screen. The
Calibration Menu is now hidden again.
CALIBRATING THE 4-20MA INPUTS
For the 4-20mA Output, the first calibration point is 4mA and the second calibration point is 20mA. You
will need a handheld process calibrator such as the Fluke 725.
1. Make sure that the system is stopped.
2. Make sure that the card is installed and enabled in menu 6.
The LVL and PRS DIP switches must also be enabled on the
4-20 mA card.
3. Press the UP and DOWN Keys.
4. Press the Menu Key repeatedly until menu 7 is shown.
5. Press OK. If prompted, enter the L2 Password:
6. Connect the process calibrator’s negative lead to the ground
pin on the 4-20mA Input Card.
Calibrate the Level Zero
1. Press the Menu Key repeatedly until “4-20 Level Zero
Calibration = No” is shown on the display.
2. Use the Up or Down key to select “Yes” and begin the
calibration process. The display will now read “Apply 4mA
then press OK”.
3. Disconnect any wiring that is connected to the Level input
and instead attach the process calibrator’s positive lead in its
place.
4. Turn on the process calibrator and set it to source a current of
4mA (0%).
5. Press the OK key and the message “Calibrating Wait…”
will appear for several seconds followed by the message
“Parameter Set” after the calibration has successfully
completed.
Calibrate the Level Input’s Span point:
1. Press the Menu Key repeatedly until “Calibrate 4-20 LVL
Span?” is shown on the display.
2. Use the Up or Down key to select “Yes” and begin the
calibration process. The display will now read “Apply 20mA
then press OK”.
3. Set the process calibrator to source a current of 20mA (100%).
4. Press the OK key and the message “Calibrating Wait…”
will appear for several seconds followed by the message
“Parameter Set” after the calibration has successfully
completed.
5. Disconnect the process calibrator from the Level input and
reconnect any wiring that was removed from it previously.
Calibrate the Pressure Input’s Zero point:
1. Press the Menu Key repeatedly until “Calibrate 4-20 PRS
Zero?” is shown on the display.
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