Keysight Technologies U1231A Service Manual

Contents

1 Calibration Procedures26 Keysight U1231A, U1232A, and U1233A Service Guide7 Capacitance[d] Turn therotary switch to the , , orposition.1000 nF 1000 nF ±21 nF ±21 nF ±21 nF10 μF 10 μF ±0.21μF ±0.21μF ±0.21μF100 μF 100 μF ±2.1 μF ±2.1 μF ±2.1 μF1000 μF 1000 μF ±21 μF ±21 μF ±21 μF10 mF 10 mF ±0.21 mF ±0.21 mF ±0.21 mF[d] The accuracy for all ranges is specified based on a film capacitor or better, and after the Null function is used to subtract the residual values(by opening the test leads).8 Scale[e] While the rotaryswitch is in the orposition, press thekey (until mV is shown onthe display).600 mV 600 mV 3.2 mV 3.2 mV -600 mV 600 mV, 70 Hz 6.3 mV 6.3 mV -[e] AC/DC mV measurement must be enabled prior to this step. Refer to the “Enable the AC/DC mV measurement” section of Chapter 4,“Multimeter Setup Options” in the U1231A/U1232A/U1233A User’s Guide for further information on how to enable the AC/DC mVmeasurement.9 Temperature[f] Whilethe rotary switch is in theor position, press thekey once.–40 °C to 1372 °C 0 °C - - ± (Probeaccuracy+ 1.0 °C)[f] Ensure that the ambient temperature is stable within ±1 ºC. Ensure that the multimeter is placed in a controlled environment for at least 1hour before you proceed to ensure that the multimeter’s internal reference junction sensor and input terminal are stabilized at the sameenvironment. Keep the multimeter away from any ventilation exit.Differences in ambient compensation between the calibrator and multimeter may cause some deviations shown between the readings ofthe calibrator and multimeter. Placing the multimeter close to the output terminal of the calibrator will help reduce this deviation.Do not touch the thermocouple test lead after connecting it to the calibrator. Allow the connection to stabilize for at least another 15minutes before performing the measurement.Set both Fluke 5520A and multimeter to internal reference.To perform the measurement, connect one end of the K-type thermocouple (with miniature TC connector on both ends) to the 5520A TCoutput, and the other end to the multimeter via a TC-to-banana adapter. Allow at least 1 hour for the multimeter to stabilize.Table 1-2 Performance verification tests (continued)Step Test function Range 5520A input Error from nominal 1 yearU1231A U1232A U1233AAUXAUXHzAUXShiftEscAUXShiftEsc