KEP ES749 - Page 91

ES749 Flow Computer
87
SERVICE & ANALYSIS
6.15
SERVICE &
ANALYSIS
(Continued)
This feature allows the calibration of the units inputs and outputs.
CAUTION:
The calibration should only be performed by qualied technicians.
The calibration procedure requires the use of precision Voltage &
Current sources, a frequency generator, a 100Ω resistor (± 0.1%),
an ammeter, an ohmmeter and a frequency counter. If calibration
fails, use the "Restore Factory Calibration" feature.
Selection:
NO, YES
Display: PERFORM? YES
CALIBRATION
Connect your voltage source to (+) Pin 2 and (-) Pin 4.
Apply 0.0 Volts. Press enter to learn 0.0 Volts.
Display: RESULT: 0.000 V
LEARN 0.0 V PIN 2
Apply 10.0 Volts. Press enter to learn 10.0 Volts.
Display: RESULT: 10.000 V
LEARN 10.0 V PIN 2
Connect your current source to (+) Pin 2 and (-) Pin 4.
Apply 0.0 mA. Press enter to learn 0.0 mA.
Display: RESULT: 0.000 mA
LEARN 0.0 mA PIN 2
Apply 20.0 mA. Press enter to learn 20.0 mA.
Display: RESULT: 20.000 mA
LEARN 20.0 mA PIN 2
Connect your current source to (+) Pin 3 and (-) Pin 4.
Apply 0.0 mA. Press enter to learn 0.0 mA.
Display: RESULT: 0.000 mA
LEARN 0.0 mA PIN 3
Apply 20.0 mA. Press enter to learn 20.0 mA.
Display: RESULT: 20.000 mA
LEARN 20.0 mA PIN 3
PERFORM
CALIBRATION
NOTE:
This menu item will only
appear if editing is en-
abled with Service Code.
VOLTAGE INPUT
CALIBRATION
LEARN
0.0 V
(Pin 2)
LEARN
10.0 V
(Pin 2)
CURRENT INPUT
CALIBRATION
LEARN
0.0 mA
(Pin 2)
LEARN
20.0 mA
(Pin 2)
LEARN
0.0 mA
(Pin 3)
LEARN
20.0 mA
(Pin 3)