Fluke 125B/S Calibration Guide - Page 48

Capacitance Clamp and Zero, Capacitance Gain, Save Calibration Data and Exit

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123B/124B/125B Calibration Manual Capacitance Clamp and Zero To do the capacitance clamp voltage and zero calibration: 1. Push  to select calibration adjustment step Clamp Zero (CL 0540):IDLE. 2. Short CH A to COM. 3. Push  to start the calibration. 4. Wait until Clamp. Zero (CL 0540): READY shows on the display. 5. Remove the CH 1 and CH 2 connections. 6. Push  to select the calibration adjustment step Clamp Zero (CL 0541):IDLE. 7. Push  to start the calibration. 8. Wait until Cap. Zero (CL 0564): READY. shows on the display. 9. Continue to the next section. Capacitance Gain To do the Capacitance Gain calibration for each Calibration Step in Table 17: 1. Push  to select the calibration step. Start with Cap. Gain (CL 0565):IDLE. 2. Connect the Test Tool to the Calibrator as shown in Figure 13. 3. Set up the Calibrator: a. Supply the Input Value that corresponds to the Calibration Step. b. Push . 4. On the Test Tool: a. Push  to start the calibration. b. Wait until Cap. Gain (CL 0565):READY shows on the display. 5. Continue to the next section. Table 17. Capacitance Gain Calibration Points Cap Gain (CL 0565) Cap Gain (CL 0566) Cap Gain (CL 0567) Cap Gain (CL 0568) Cap Gain (CL 0569) Calibration Step 50 nF 50 nF 5 μF 50 μF 500 μF Input Value Save Calibration Data and Exit To save the calibration data and exit the Maintenance mode: 1. Remove all test leads from the Test Tool inputs. Do NOT turn off the Test Tool. 2. Push  (EXIT). The Test Tool shows the shows a message that the calibration is valid and prompts you to save the data. Note Calibration data valid indicates that the calibration adjustment procedure is performed correctly. It does not indicate that the Test Tool meets the characteristics listed in the Specifications section. 3. Push  (YES) to save and exit. Note • The calibration number and date are updated only if the calibration data have been changed and the data are valid. • The calibration data will change when a calibration adjustment is done. The data will not change when entering and then leaving the maintenance mode without doing a calibration adjustment. • The calibration number and date will NOT be updated if you adjust the display contrast only. If the Test Tool shows a warning that the data in not valid, return to Maintenance mode. 40

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123B/124B/125B
Calibration Manual
40
Capacitance Clamp and Zero
To do the capacitance clamp voltage and zero calibration:
1.
Push
to select calibration adjustment step
Clamp Zero (CL 0540):IDLE
.
2.
Short CH A to COM.
3.
Push
to start the calibration.
4.
Wait until
Clamp. Zero (CL 0540): READY
shows on the display.
5.
Remove the CH 1 and CH 2 connections.
6.
Push
to select the calibration adjustment step
Clamp Zero (CL 0541):IDLE
.
7.
Push
to start the calibration.
8.
Wait until
Cap. Zero (CL 0564): READY
. shows on the display.
9.
Continue to the next section.
Capacitance Gain
To do the Capacitance Gain calibration for each Calibration Step in Table 17:
1.
Push
to select the calibration step. Start with
Cap. Gain (CL 0565):IDLE
.
2.
Connect the Test Tool to the Calibrator as shown in Figure 13.
3.
Set up the Calibrator:
a.
Supply the Input Value that corresponds to the Calibration Step.
b.
Push
.
4.
On the Test Tool:
a.
Push
to start the calibration.
b.
Wait until
Cap. Gain (CL 0565):READY
shows on the display.
5.
Continue to the next section.
Save Calibration Data and Exit
To save the calibration data and exit the Maintenance mode:
1.
Remove all test leads from the Test Tool inputs. Do NOT turn off the Test Tool.
2.
Push
(EXIT). The Test Tool shows the shows a message that the calibration is valid and prompts you to
save the data.
Note
Calibration data valid indicates that the calibration adjustment procedure is performed
correctly. It does not indicate that the Test Tool meets the characteristics listed in the
Specifications section.
3.
Push
(YES) to save and exit.
Note
•
The calibration number and date are updated only if the calibration data have been
changed and the data are valid.
•
The calibration data will change when a calibration adjustment is done. The data
will not change when entering and then leaving the maintenance mode without
doing a calibration adjustment.
•
The calibration number and date will NOT be updated if you adjust the display
contrast only.
If the Test Tool shows a warning that the data in not valid, return to Maintenance mode.
Table 17. Capacitance Gain Calibration Points
Calibration Step
Input Value
Cap Gain (CL 0565)
50 nF
Cap Gain (CL 0566)
50 nF
Cap Gain (CL 0567)
5
μ
F
Cap Gain (CL 0568)
50
μ
F
Cap Gain (CL 0569)
500
μ
F