Cropico DO7 - Calibration; Verification

CROPICO LTD – DO7
Issue 7/2001
12
18. CALIBRATION
18.1
Insert the calibration key into the panel switch and turn to CAL. The CAL LED should light
up.
18.2 Set the calibration Standard to 40 Ohm, Zero.
18.3 Set the DO7 to 60 Ohm range, +ve, and press LOCK+ON.
18.4 When the reading has settled, press KYB. The display should read 0.
Press OK. The LED should light up for about 3 sec.
The reading should now be 0.00 +/-1 digit. If not, repeat this step.
18.5 Set the calibration Standard to +FS.
18.6 When the reading has settled, press KYB.
Enter the value 40 using the keypad and press OK. The LED should light up for about 3
sec.
The reading should now be 40.00 +/-1 digit. If not, repeat this step.
18.7
Repeat steps 18.2 thru' 18.6 for the remaining ranges.
18.8 Turn the panel switch to RUN and remove the key.
19. VERIFICATION
19.1 Ensure that the panel switch is set to RUN and the calibration key is removed.
19.2 Set the calibration rig to 40 Ohm, Zero.
19.3 Set the DO7 to 60 Ohm range, +ve, and press LOCK+ON. Wait for the reading to settle.
The reading should be 0.00 +/-1 digit. Note the actual reading in the Calibration Test
Results sheet.
19.4 Set the calibration rig to +FS and wait for the reading to settle.
The reading should be 40.00 +/-1 digit. Note the actual reading in the Calibration Test
Results sheet.
19.5 Set the DO7 to -ve and wait for the reading to settle.
The reading should be -40.00 +/-1 digit. Note the actual reading in the Calibration Test
Results sheet.
19.6 Set the DO7 to AVE and wait for the reading to settle.
The reading should be 40.00 +/-1 digit. Note the actual reading in the Calibration Test
Results sheet.
19.7 Reset the DO7 to +ve. Set the calibration rig to 4 Ohm, +FS and wait for the reading to
settle.
The reading should be 4.00 +/-1 digit. Note the actual reading in the Calibration Test
Results