CHAPTER 7. CALIBRATION
UB25 LINEAR DC RESISTANCE WELDING CONTROL
7-4
990-665
Section III. Calibration Procedure
1
Verify that the equipment is connected as shown in
Calibration Setup.
2
Turn the Power Supply
ON
.
3
Press the
MENU
key to bring up the
MAIN MENU
screen.
4
Press the
7
key to select
CALIBRATION
.
5
From the first calibration screen, press
the keypad
▼
(down) key to the
PRE-
CALIBRATION
screen.
6
From the
PRE-CALIBRATION
screen,
press the
3
key to
RESET
CALIBRATION
before
performing the
following procedures.
7
At the screen prompt, press the
2
key for
YES
to confirm that you want to reset
calibration.
8
From the
PRE-CALIBRATION
screen, press the
2
key to start the sequence of on-screen
calibration instructions.
9
The next screen is
CALIBRATION SHUNT
which requires you to enter the actual value of the
4,000 micro-ohm shunt (the value is printed on the exterior of the shunt). Enter the value using
the numeric keypad, then go to the next screen.
NOTE
: The prompts at the
bottom
of the screen that tell you how to go to the next screen may
vary from screen to screen. To go to the next screen, press the key indicated by the prompt.
10
Follow the instructions on the calibration screens. Each screen will show you the desired energy
output value for that calibration step. Use the oscilloscope to measure the output, then use the
▲▼
keys to adjust the Power Supply output to the correct
average
value.
MAIN MENU
0. WAVEFORM CHECK 5. COMMUNICATION
1. SETUP
6. RELAY
2. WELD COUNTER
7. CALIBRATION
3. COPY A SCHEDULE 8. RESET DEFAULTS?
4. SYSTEM SECURITY 9. CHAIN SCHEDULES
NUMBER Select an item
CAUTION
CALIBRATION SHOULD BE PERFORMED BY A
QUALIFIED TECHNICIAN ONLY.
REFER TO MANUAL FOR CALIBRATION SETUP.
▼
Next, MENU menu
PRE-CALIBRATION
1. TEST UB25 (T-232 REQUIRED)
2. CALIBRATE UB25
3. RESET CALIBRATION
4. TEST SERIAL PORT
▼
NUMBER Select, MENU Previous menu
