THDP-TMDP_Instructions-077054003.pdf - 第49页

Rise time 1. V erify that the pulse generator output is off and then connect the probe to the oscilloscope. 2. Connect the probe inputs, through the adapters shown below , to the pulse generator output. Set the probe inp…

DC gain Accuracy

WARNING: Dangerous voltages will be present on the calibration generator output terminals and connection cables. Always verify

that the generator is in the standby mode before you make any connections to the generator

1. V

erify that the generator output is off.

2. Connect the probe calibration fixture to any channel (1–4) on the oscilloscope.

3. Connect the probe output to the probe calibration fixture and the probe inputs to the generator.

4. Connect the output of the probe calibration fixture to the inputs of the DMM, using coax cables and adapters. Set the DMM to AC volts.

5. Set the probe attenuation to the lower range for the probe that you are testing. See T

able 10 on page 48.

6. Set the generator square wave output frequency and RMS voltage (main display) to the values shown in the table for the probe that

you are testing.

7. Enable the generator output and record the probe output (as displayed on the DMM) in the test record.

8. Disable the generator output.

9. Set the probe attenuation to the next range and then repeat steps 6 on page 48 through 8 on page 48.

Table 10: DC gain accuracy equipment settings

Probe Generator output Probe output voltage

Model Range Voltage (rms) Frequency Expected (rms) Measured (rms)

THDP0100 600 V 75 V 100 Hz 750 mV ±15 mV

6000 V 75 V 100 Hz 75 mV ±15 mV

THDP0200 150 V 25 V 100 Hz 500 mV ±10 mV

1500 V 75 V 100 Hz 150 mV ±3 mV

TMDP0200 75 V 20 V 100 Hz 800 mV ±16 mV

750 V 60 V 100 Hz 240 mV ±4.8 mV

Performance verification

Rise time

1. V

erify that the pulse generator output is off and then connect the probe to the oscilloscope.

2. Connect the probe inputs, through the adapters shown below, to the pulse generator output. Set the probe input leads straight and

parallel for best signal response.

3. Set the output of the pulse generator to 50 V

, 1 kHz, and a 200 ns pulse output. (The probe input voltage will be 25 V due to the 2X

attenuator in the circuit.)

4. Set the oscilloscope to 5 V/div, 10 ns/div, BW = full, average = 16.

5. Set the probe bandwidth to full and the attenuation to the first range listed in the table.

6. Enable the generator output and check that the rise time does not exceed the target rise time value listed in the table. Use the

auto-measure feature of the oscilloscope to determine the rise time.

7. Record the rise time in the test record.

8. Set the probe attenuation to the next range and adjust the vertical volts/div to display the signal.

9. Record the rise time in the test record and disable the generator output.

Table 11: Rise time test equipment settings

Probe Generator output Measurement

Model Range Voltage Frequency Target Measured

THDP0100 600 V 50 V 1 kHz ≤3.6 ns

6000 V 50 V 1 kHz ≤3.6 ns

THDP0200 150 V 50 V 1 kHz ≤2.4 ns

1500 V 50 V 1 kHz ≤2.0 ns

TMDP0200 75 V 50 V 1 kHz ≤2.4 ns

750 V 50 V 1 kHz ≤2.0 ns

Performance verification

High Voltage Differential Probes THDP0100/0200 and TMDP0200 User Manual 49

Test record

Photocopy this test record for recording the results of the performance verification procedures.

Table 12: THDP and TMDP Series probes test record

Probe Model:

Probe Serial Number:

emperature:

Certificate Number:

RH%:

Technician:

Date of Calibration:

Probe test Range Minimum Incoming Outgoing Maximum

THDP0100 gain accuracy 600 V 735 mV 765 mV

6000 V 73.5 mV 76.5 mV

THDP0200 gain accuracy

150 V 490 mV 510 mV

1500 V 147 mV 153 mV

TMDP0200 gain accuracy

75 V 784 mV 816 mV

750 V 235.2 mV 244.8 mV

THDP0100 rise time

600 V — 3.6 ns

6000 V — 3.6 ns

THDP0200 rise time

150 V — 2.4 ns

1500 V — 2.0 ns

TMDP0200 rise time

75 V — 2.4 ns

750 V — 2.0 ns

Performance verification