Vanguard ATO-600P - Manual (Page 38)

ATO-400P / ATO-600P Operating Procedures
38
7.12 Calibration Test Procedure
This procedure describes the steps to verify the ATO measurement accuracy and generates a
calibration report. Five different calibration shunts are required for this test: 50micro-ohm, 100
micro-ohm, 500 micro-ohm, 1000 micro-ohm, 1900 micro-ohm. These test shunts shall be 0.1%
accuracy or better.
Table 13.0 Calibration Test Procedure
STEP ACTION ATO DISPLAY
13-1 Press key # 2 on the START MENU to go
to the SETUP MENU shown at right.
13-2 On the SETUP MENU, press key #4
(NEXT PAGE).
13-3 Press key #2 to select “CALIBRATE
UNIT”.
13-4 Press the “ENTER” key to continue.
13-5 Connect the 50 micro-ohm shunt to the
ATO. Press the “ENTER” key to start test.
13-6 Automatic; the ATO will measure the 50
?
-
ohm shunt at 10A test current.
13-7 Automatic; the ATO will measure the 50
?
-
ohm shunt at 100A test current.
Test results will be printed at the end of the
100A test.
13-8 Connect the 100 micro-ohm shunt to ATO.
Press “ENTER” key to start test.
1. ENTER RECORD ID
2. REVIEW RECORD
3. RESTORE RECORD
4. NEXT PAGE
1. SET TIME
2. CALIBRATE UNIT
CALIBRATION-SPECIFIC
SHUNTS ARE REQUIRED!
“ENTER” TO CONTINUE
CONNECT 50
? -OHM
0.1% SHUNT NOW… .
“ENTER” TO CONTINUE
CURRENT: 10.0 AMP
BURN IN: 02 SEC
50
? -OHM TEST
CURRENT: 100.0 AMP
BURN IN: 02 SEC
50
? -OHM TEST
CONNECT 100
? -OHM
0.1% SHUNT NOW… .
“ENTER” TO CONTINUE
CURRENT: 10.0 AMP
BURN IN: 02 SEC
100
? -OHM TEST