Instrument Setup; Normalizing The Hv Probe And Digital Multimeter - Fluke 1550 Calibration Manual

Instrument Setup

Turn the MegOhmMeter on and wait for Test Voltage to appear on the display. From
the computer terminal, activate the HyperTerminal program from the Windows Start
menu. Set the communications settings to:
Bits per second (Baud) = 9600
Data bits = 8
Parity = None
Stop bits = 1
Flow control = None
The calibration menu can now be displayed by typing "homer" on the terminal. The
following menu options will be displayed:
----> Calibrate HV Output and Measurement
Calibrate Current Measurement
Calibrate Charge Measurement
Calibrate Battery Status
Install Default Opvars
Dump Opvars
Dump Raw ADC Readings
V
The UUT
used for moving the cursor to the desired menu option.
push the terminal
this time.
While performing the following procedures, the equipment and
user can be exposed to dangerous high voltage when the UUT
is in the "Calibrate HV Output and Measurement" mode.

Normalizing the HV Probe and Digital Multimeter

1. Connect the HV probe and digital multimeter to the 5520A NORMAL output
terminals, observing polarity. Manually set the multimeter for a range that has a 10
MΩ input impedance (e.g., 100 V) and provides a maximum resolution for a 500 mV
and 5000 mV input.
2. Set the 5520A output to 506 V and note the digital multimeter reading. Record this
value.
3. Set the 5520A output to 1000 V and note the voltmeter reading. If the error is
> 0.025 % from the nominal value, calculate the error from nominal into a
percentage. Multiply 5005 V by this percentage and algebraically add to 5005 V.
Record this value.
4. Set the 5520A to standby and disconnect the HV probe and digital multimeter.
WCaution
d
keys or the ↑ and ↓ keys of the terminal, are
and
key for any of these options at
ENTER
WXWarning
MegOhmMeter
Calibration Procedure
Do not
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