Associated Research 620L, Руководство по эксплуатации и обслуживанию

Страница: 152 / 223

146
9.2. Calibration Initialization
Press and hold the calibration key on the rear panel with a pen, pencil or small
screwdriver while powering ON the 620L. The 620L enters calibration mode after the
power on sequence is complete.
The Calibration screen is separated into three sections. The left half of the screen
lists all of the calibration points necessary for an accurate calibration of the instrument.
The right half of the screen is split into two smaller screens. The upper right section of
the screen displays meter and load information required to perform the selected
calibration. The lower right section of the screen contains prompts that will help guide
you through the calibration process.
Selecting Specific Calibration Points
When the calibration is initialized, the first calibration point is automatically selected.
The calibration is set up so that as each calibration point is completed the highlighted
area will automatically scroll to the next calibration point.
To manually select calibration points, use the up and down arrows to scroll the
highlighted area to the desired calibration point. The load/meter screen and prompt
screens will automatically update for the calibration point selected.
Calibration of Parameters
Each calibration point requires different loads, standards and process. As each point
is selected, the load/meter screen and prompt screens will display the meter, load and
process information required to complete the calibration process for the selected
point.
Hardware calibration
This paragraph covers the hardware calibration procedure for the LLT Leakage
8.00mA
– 20.00mA range. The hardware calibration is required to be performed prior
to the standard software calibration of the LLT MD Volts x0.1 range only when the
Analog Control Board ANG7630 replaces.
Required Measurement Standard:
Wideband Voltmeter 100 kHz capable of measuring to 20 VAC
Sine Wave Generator 100 Hz to 100 kHz capable
Procedure:
Connect the Probe-HI and Probe-LO leads to output of the Sine Wave Generator and
in parallel with Wideband Voltmeter.
Select the LLT step and set Leakage-HI = 20.00mARMS in manual ranging mode with
filter set to AC+DC, Dwell Time = 0.0s, Measuring
Device to “Frequency Check”, and
Probe configuration to “Probe-HI To Probe-LO”.
Set the output frequency of the Sine Wave Generator to 100 kHz.