Calibration 19-15
Remote PreAmp calibration procedure
Step 1: Prepare the Model 6430 for calibration
1. With the power off, connect the Remote PreAmp MAINFRAME connector to the
mainframe REMOTE PreAmp connector using the supplied cable.
2. Turn on the Model 6430, and allow it to warm up for at least one hour before perform-
ing calibration.
3. Press the MENU key, then choose CAL and press ENTER. Select UNLOCK, and then
press ENTER. The instrument will display the following:
PASSWORD:
Use , ▲, ▼, , ENTER or EXIT.
4. Use the up and down range keys to select the letter or number, and use the left and right
arrow keys to choose the position. Enter the present password on the display. (Front
panel default: 006430.) Press ENTER to complete the process.
5. Press EXIT to return to normal display.
Step 2: Voltage burden calibration.
1. Connect the Model 6430 Remote PreAmp IN/OUT HIGH jack to the digital multimeter
INPUT HI and LO jacks using the adapters and cables shown in Figure 19-3. (Use the
type of adapter that connects BNC shell to triax shell, and be sure the cable shield is
connected to DMM INPUT LO.)
2. Select the multimeter DC volts function, 10 PLCs, and enable auto-range.
3. Select V-BURDEN in the calibration menu, then press ENTER. The unit will prompt
you as follows:
PREAMP V-BURDEN CAL
Connect V-Meter & press ENTER
4. Press ENTER. The instrument will prompt you for the first of three DMM readings:
DMM RDG: +000.0000mV
Use , ▲, ▼, , ENTER or EXIT.
5. Using the RANGE keys and EDIT keys, adjust the display to agree with the DMM
reading.
6. Press ENTER. The instrument will prompt you for the second DMM reading:
DMM RDG: +000.0000mV
Use , ▲, ▼, , ENTER or EXIT.
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