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

1550C/1555
Calibration Manual

Instrument Setup

Turn the product on and wait for Test Voltage to appear on the display. From the
computer terminal, activate the Snorre program from the Windows Start menu.
On the Setup tab, confirm the selected COM port settings.
To prevent possible electrical shock, fire, or personal injury, do
not contact the output terminals or test equipment terminals
while performing the following procedures. Potentially
dangerous voltages can occur 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
2. Set the 5520A output to 506 V and note the digital multimeter reading.
3. Set the 5520A output to 1000 V and note the voltmeter reading. If the error is
4. Set the 5520A to standby and disconnect the HV probe and digital

HV Adjustment

1. Select the CAL HV tab.
2. Connect the HV probe and digital multimeter to the output terminals of the
3. Press the START button to begin adjustment. The UUT briefly displays HV
4. Use  and  on the terminal to modify the UUT output value to as close
5. Press the Cal 500 button. The UUT now increases its output of the 1550C to
6. Use  and  on the terminal to modify the UUT output value to as close
7. Press the Cal 500 button. The HV generation and measurement functions are
8. Disconnect the HV probe and digital multimeter from the UUT.
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terminals, observing polarity. Manually set the multimeter for a range that has
a 10 MΩ input impedance, for example, 100 V, and provides a maximum
resolution for a 500 mV and 5000 mV input.
Record this value.
> 0.025 % from the nominal value, convert the error from nominal to
percentage. Multiply 5005 V by this percentage and algebraically add to
5005 V. Record this value.
multimeter.
UUT, as shown in the connection diagram.
OFFSET then flashes  with PWM 600, while emitting a beep at 1-second
intervals.
as possible to the value recorded in step 2 of Normalizing the HV Probe and
Digital Multimeter. The nominal value for this adjustment is between 502 and
510 V.
nominally 5000 V, the output of the 1555 goes to a nominal 10,000 V.
as possible to the value obtained in step 3 of Normalizing the HV Probe and
Digital Multimeter. The nominal value for the 1550C adjustment is between
5000 V and 5010 V, the target range for the 1555 adjustment is 10 000 V and
10 020 V.
now calibrated.
XW Warning