Vanguard ATO-600 - Manual (Page 36)

ATO-400 / ATO-600 Operating Procedures
36
6.11 Calibration Test Procedure
This procedure describes the steps to verify the ATO mesurement 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 12.0 Calibration Test Procedure
STEP ACTION ATO DISPLAY
12-1 Press key # 2 on the START MENU to go
to the SETUP MENU shown at right.
12-2 On the SETUP MENU, press key #4
(NEXT PAGE).
12-3 Press key #2 to select “CALIBRATE
UNIT”.
12-4 Press “ENTER” key to continue.
12-5 Connect the 50 micro-ohm shunt to ATO.
Press “ENTER” key to start test.
12-6 The ATO will measure the 50
?
-ohm shunt
using 10A test current.
Observe test results on LCD.
12-7 Press “ENTER” key to continue.
The ATO will measure 50
?
-ohm shunt
using 100A test current.
12-8 Observe test results. Press “ENTER” key to
continue.
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
FINAL RESISTANCE
I= 9.9 AMPS
50.5 MICRO-OHM
ANY KEY TO CONTINUE
CURRENT: 100.0 AMP
BURN IN: 02 SEC
50
? -OHM TEST
FINAL RESISTANCE
I= 100.0 AMPS
50.4 MICRO-OHM
ANY KEY TO CONTINUE