Technical data

128 34405A User’s and Service Guide
6 Specifications
Temperature and Capacitance Specifications
[1]
[1] Specifications are for 30 minutes warm-up, 5½-digit resolution and calibration temperature 18° C - 28° C.
[2] 20% over range on all ranges except 1000Vdc.
[3] Specifications are 2-wire ohms using Math Null. If without Math Null, add 0.2Ω additional error.
[4] Specifications are for the voltage measured at the input terminals only.
[5] 20% over range on all ranges except 750 VAC
[6] Specifications are for sinewave inputs > 5% of range. Maximum crest factor : 3 at full scale.
[7] Additional error to be added as frequency > 30kHz and signal input < 10% of range. 30kHz ~ 100kHz:
0.003% of full scale per kHz.
[8] For 12A terminal, 10A DC or AC rms continuous, > 10A DC or AC rms for 30 seconds ON and 30 seconds
OFF.
[9] Frequencies > 5 kHz are typical for all ranges.
[10] Specifications are for half-hour warm-up, using 0.1 second aperture. The frequency can be measured
up 1Mhz as 0.5V signal to 100mV/1V ranges.
[11] For 20Hz - 100kHz, the sensitivity is AC input voltage from 10% to 120% of range except where noted.
[12] For 100kHz ~ 300kHz, the sensitivity will be 12% ~ 120% of range except 750V range.
[13] Input Impedance is in parallel with capacitance < 120 pF.
[14] For input < 200V rms.
[15] For input < 300V rms.
[16] For 20Hz - 10kHz, the sensitivity is AC input current from 10% to 120% of range except where noted.
[17] Minimum measured frequency is 1 Hz.
Table 27 Temperature and Capacitance Accuracy ± (% of reading + % of range)
Function Range
Probe Type
or Test Current
1 Year
23° C ± 5° C
Temperature Coefficient
0° C - 18° C
28° C - 55° C
Te mp e ra t ur e -80.0° C to 150°C 5 kΩ thermistor probe Probe accuracy + 0.2 °C 0.002 °C
-110.0° F to 300.0° F 5 kΩ thermistor probe Probe accuracy + 0.4 °F 0.0036 °F
Capacitance 1.000 nF 0.75 µA 2+0.8 0.02+0.001
10.00 nF 0.75 µA 1+0.5 0.02+0.001
100.0 nF 8.3 µA 1+0.5 0.02+0.001
1.000 µF - 100.0 µF 83 µA 1+0.5 0.02+0.001
1000 µF 0.83 mA 1+0.5 0.02+0.001
10,000 µF 0.83 mA 2+0.5 0.02+0.001