1730
Calibration Manual
18
Table 8. Calibration & Verification in Excel Worksheet (cont.)
Item Description
Sensor selector – select items from the list for a verification of the accessory.
Use DIRECT for the Fluke 1730 verification.
Calibration items – Select Voltage, AUX Input or Current input for calibration. For a Fluke 1730
calibration all three items need to be calibrated sequentially. A specific order is not required.
Calibrator Control setup – When the calibrator is connected to the PC using a RS232 cable
select Automatic to control the calibrator. Use the drop-down list box to configure the COM
port. Otherwise select Manual.
Voltage Divider setup – Configure the resistor values, R1 and R2, of the voltage divider for
current verification. Store the Excel workbook to keep the applied values for future use.
Supported Calibrators:
Fluke 5520A and 5522A
Calibrator settings:
Baud rate: 9600
Data bits: 8
Stop bit: 1
Parity: None
Stall: XON/XOFF
EOL: CR/LF
Basic Instrument Setup for all Verifications
The Fluke1730-ExcelTool_Vxxx (ExcelTool) has built-in procedures to verify and
adjust the 1730. The Verification uses an external divider. This divider, (see
Verification Box Assembly) provides more accurate voltages than a direct
connection to the 5520A. The 5520A uses a divider with a 50 Ω output
impedance when sourcing <330 mV. Due to variations in the 1730 input
impedance, the actual applied voltage is less than the programmed voltage.
Using an external divider where the parallel resistance is ~30 Ω allows
calculation of the applied voltage with confidence that the 1730 input loading will
not significantly impact the applied voltage.
The ExcelTool calculates the voltage that should be applied based on the values
entered in the setup screen.
1. Apply power to the 1730 using the power supply and line cord.
2. Turn on the 1730.
3. Connect the 1730 USB to the PC and start a communication program. See
USB Communication.
4. Select Instrument Setup as no voltage transformers used.
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