User Guide

Form number TM61920 Rev 4 July 2008
Page 7
(2) Calibration Procedure
It is recommended that all IDEAL meters undergo the following calibration procedure
on an annual basis.
(2.1) Press the POWER button, without clamping anything,
while the CAL button is being pressed down. Then
release the POWER button.
Version information (3-digit) about this instrument is
displayed in a short minute.
Then the instrument goes into  adjustment mode.
(2.2) Adjust VR for Hi range
Press the A/ button until the mark is displayed at
the upper position of the LCD for a moment and “Hi” is
displayed at the left of the mark. Turn VR401 to adjust
the flickering reading to be within 165.0 ~ 175.0.
(2.3) Waveform check at Hi range (Figure 4)
Clamp onto the ring formed by the probe of the oscilloscope
The waveform should be a sine wave. Remove the jaws
from the ring when the sine wave is observed.
(2.4) VR adjustment at Lo range.
The message “Lo” is displayed at the upper of the LCD when
MEM/MODE button is pressed. Turn VR402 to adjust
the flickering reading to be 800 or close value. Then fine
adjust the value using VR402 to fall within 800 ~ 0.
(2.5) Waveform check in Lo range (Figure 4)
Clamp onto the ring formed by the probe of the oscilloscope.
The waveform should be a sine wave. Remove the jaws
from the ring when the sine wave is observed.
(2.6) Resistance range Adjustment (2) (Adjustment for Hi range)
Press the A/ button twice. The mark “F.S” is displayed
at the upper position of the LCD.
(This status is same as when Hi range is selected.)
(3) Full scale adjustment
Wait for a while without clamping anything.
Press the CAL button when MEM mark appears.
Later, “OL” or some value is displayed on the LCD.
(3.1) 1000
Use 1000 resistor.
Press the MEM/WRITE button when MEM mark appears
on the LCD and the reading becomes stable.
(3.2) 200
Press the  button once. Then 200 is displayed at the upper
position on the LCD. Use 200 resistor.
Press the MEM/WRITE button when MEM mark appears
on the LCD and the reading becomes stable.
(3.4) 20
Press the  button once. Then 20 is displayed at the upper position
on the LCD. Use 20 resistor.
Press the MEM/WRITE button when MEM mark appears
on the LCD and the reading becomes stable.
Fig. 4 Check of waveform
CAL SW
POWER
SW
Fi
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3
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