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•
If the reading stabilizes at a reading significantly variant from the first setpoint, an
intermittent ERROR will prompt the user to check the beaker or bath.
Calibration procedure may be interrupted by pressing CAL again at any time. If the
calibration procedure is stopped this way, or if the controller is switched off before the
last step, no calibration data is stored in non-volatile memory (EEPROM).
ANALOG INPUT CALIBRATION
The analog input is already factory calibrated. However, the user may also perform a
2-point calibration at 4 and 20 mA. It is sufficient to perform the calibration on one
range only.
• Connect a mA simulator (e.g. HI931002) to the analog input of the controller
(#12 at page 7)
• Press and hold first CFM and then CAL to enter the analog input calibration mode.
• Execute the password procedure.
• Select code 0 via the arrow keys
for analog input calibration and
confirm with CFM. CAL will blink
on the LCD.
• The secondary LCD will display
“4” for the first calibration point. The primary LCD
will display the conductivity reading.
• Set the mA simulator to 4 mA and wait for the reading to stabilize, CAL will stop
blinking and an intermittent CFM will prompt the user to confirm the calibration.
• If the reading stabilizes at a reading significantly variant from the first calibration
point, an intermittent ERROR will prompt the user to check the input.
• CAL will blink on the LCD. The measured tem-
perature will be displayed on both the primary and
secondary LCD.
• Use the arrow keys to set on the secondary LCD the
temperature read by the reference thermometer.
• When the reading has stabilized at a value near the calibration point, CAL will stop
blinking and an intermittent CFM will prompt the user to confirm the calibration.
Calibration procedure may be interrupted by pressing CAL again at any time. If the
calibration procedure is stopped this way, or if the controller is switched off before the
last step, no calibration data is stored in non-volatile memory (EEPROM).
