Sentry Sample Sequencer 5 Installation, Operation And Maintenance Manual page 58

Sentry Equipment Corp | Sample Sequencer
7.4.1 Analog Input Calibration
Tools Required: Calibrated milliamp supply.
1. To calibrate analog inputs, use the Analog Inputs – Cal screen.
2. Remove the existing analog input wires and connect a calibrated milliamp supply to
terminals AI and GND on the desired analyzer terminal block, labeled "Analyzer 'x'".
3. Supply 4.00 mA from a calibrated source to the desired input.
4. Touch the "Press to Cal" area of the screen. The status area will then indicate that the
input is calibrating.
5. When finished, the input will read "Enter 20.00 mA. Supply 20 mA from a calibrated
source to the input.
6. Touch the "Press to Cal" area to begin. The status area will then indicate that the input is
calibrating.
7. Once the input has finished calibrating, the status area will be blank and calibration will
be complete.
8. Repeat process for any additional analog inputs you wish to calibrate. When finished,
touch the save button to save all calibration values, or the escape button to return to the
previous screen without saving.
7.4.2 Analog Output Calibration
Tools Required: Calibrated multimeter with milliamp measurement capability.
1. To calibrate analog outputs, use the Analog Outputs – Cal screen.
2. Connect a calibrated multimeter to the + and – terminals of the desired channel on the
terminal block labeled Track and Hold.
3. As displayed on the screen, the output should be reading 20 mA. If the multimeter isn't
reading 20.0 mA, use the up and down arrows on the screen until the multimeter is
reading 20.0 mA.
4. After you have set the 20 mA output, touch the 20.0 mA area on the screen. This will
update the output to 4 mA.
5. If the multimeter isn't reading 4.0 mA, use the up and down arrows on the screen until
the multimeter is reading 4.0 mA.
6. After you have set the 4 mA output, touch the 4.0 mA area on the screen.
7. Repeat the above steps for any other outputs you would like to calibrate. When finished,
touch the save button to save all calibration values, or the escape button to return to the
previous screen without saving.
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SPD 5.5.15