True-rms Thermal Multimeter
Calibration Adjustment
15
Calibration Adjustment
The Multimeter features closed-case calibration adjustment and uses known reference sources. The multimeter
measures the applied reference source, calculates correction factors, and stores the correction factors in nonvolatile
memory.
Note
No adjustment steps are required for temperature measurements.
If the Multimeter fails any of the performance tests, do the Calibration Adjustment procedure.
To adjust:
1.
For each step, select the control knob position and apply the input value to the terminals as indicated in Table 4.
Note
Some adjustment steps require an additional wait time after the calibrator settles, as
noted in Table 4.
2.
Push and hold
to show the mesurement.
This measurement is not calibrated so it may not match the input value. This is normal.
3.
Push and hold
to display the target input value.
4.
After each input value is applied, push
to accept the value and proceed to the next step.
5.
After you push
, wait until the step number advances before you change the Calibrator source or turn the
Mulitimeter control knob. An adjustment step can take several seconds to execute before the next step is ready.
Note
If the control knob is not in the correct position or the measured value is not within the
anticipated range of the input value for a given step:
• Display shows “
- - - -
”.
• Multimeter emits a double beep
• Softkeys do not show the reading and required input values
• Procedure does not continue to the next step when you push
6.
After the final step, the display shows
End
to indicate that the calibration adjustment is complete.
7.
Push
to return to normal operation.
Table 4. Calibration Adjustment
Calibration Step
Control Knob Position
Jacks
Source Calibrator
C-01
see Figure 1
0 V, 0 Hz
C-02
300 mV, 0 Hz
C-03
60 mV, 0 Hz
C-04
-300 mV, 0 Hz
C-05
600 mV, 60 Hz
C-06
6 V, 0 Hz
C-07
60 V, 0 Hz
C-08
600 V, 0 Hz
C-09
60 V, 60 Hz
C-10
600
Ω
C-11
6 k
Ω
C-12
60 k
Ω
C-13
600 k
Ω
C-14
6 M
Ω
C-15
2 V, 0 Hz
C-16
[1]
see Figure 2
12 mV, 100 Hz
C-17
[1]
120 mV, 100 Hz
[1]
Wait 5 s after the Calibrator settles.
