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Step
1
Connect the meter to the output #1 terminals.
2
Select CALIBRATE ANALOG OUTPUTS.
3
Select OUTPUT #1 LOW. The menu will disappear and the meter will read approximately 4 mA
(CAT) or 1 volt (VAT).
4
Use the Increment and Decrement buttons to adjust the meter reading to the exact low value of 1
volt or 4 mA. Press Enter when done.
5
Select OUTPUT #1 HIGH. The menu will disappear and the meter will read approximately 20 mA
(CAT) or 5 Volts (VAT).
6
Use the Increment or Decrement buttons to adjust the meter reading to the exact high value. Press
Enter when done.
7
Repeat steps 1-6 to calibrate other CAT or VAT outputs.
8
Press Menu to restore the main Maintenance menu.
8.6 Off-line Diagnostics
The following table describes the prompts.
Prompt
RAM SIZE (KB)
KEYBOARD TEST
DISPLAY TEST
DISK READ/WRITE TEST
12/00
Table 8-4 Calibrate Analog Output Procedure
Action
Table 8-5 Offline Diagnostic Prompts
Shows amount of RAM found during power-up self-test. If less than 1024KB,
replace the CPU.
Select this to verify operation of each key. When each key is pressed, its name
should appear onscreen. An AT keyboard can also be tested if connected.
Select this then press Enter to test each display color: red, green, blue, white,
black. Any failed display pixels should be apparent.
Select this to verify read/write disk function. You must use a formatted disk.
Disk data is unaffected by this test.
VPR & VRX – User Manual
Function
Maintenance
259
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