HP 432 Thermistor Power Meter Family

The HP 432 power meter family includes the HP 432A power meter and the HP 8477A power meter calibrator. The HP 432A power meter delivers high accuracy over a wide temperature range. By measuring the output voltage of the thermistor bridges and computing the corresponding power, even higher accuracy of 0.2 percent 0.5 microwave can be obtained. Accuracy can be maintained on even the most sensitive range because the error due to thermoelectric effect is reduced to a negligible level. Each thermistor mount is furnished with data stating the calibration factor and effective efficiency at various frequencies across the operating range. The HP 8477A power meter calibrator is specifically designed for use with the HP 432A power meter. It allows you to verify full-scale meter readings on all ranges, and meter tracking. Simply connect three cables between the power meter and calibrator; no charts or additional instruments are required.

This product family includes

HP 432A Analog Power Meter

[ Features ]

Automatic, self-balancing power meter for use with temperature-compensated thermistor sensor
High accuracy over a wide temperature range

[ Specifications ]

General Characteristics
Power Range
HP 432A:                      7 ranges with full-scale readings of 10, 30, 100,
                              and 300 µW; 1, 3, and 10 mW
                              also calibrated in dBm from -20 dBm to
                              +10 dBm full scale in 5 dB steps
HP 8477A:                     115 or 230 Vac + 10%, 50 to 400 Hz, 3 watts

Noise:                        Less than 0.25% of full scale peak (typical)

Response Time:                At recorder output, 35 ms time constant (typical)

Fine Zero:                    Automatic, operated by front panel switch

Zero Carryover:               Less than 0.50% of full scale when zeroed
                              on most sensitive range

Meter:                        Taut-band suspension, individually calibrated,
                              mirror-backed scales. Milliwatt scale more than
                              108 mm (4.25 in) long.

Calibration Factor Control:   13-position switch normalizes meter reading
                              to account for thermistor sensor calibration factor. 						Range 100% to 88% in 1% steps

Thermistor Sensor:            Thermistor sensors are required for operation of
                              the HP432A B. For microwave sensors HP 478B,
                              8478B, and 486 series, see chart below.


Outputs
Recorder Output:              Proportional to indicated power with 1 volt
                              corresponding to full scale. 1 k-ohm output impedance
BCD Output:                   8, 4, 2,1 code: "1" positive. TTL compatible logic.
                              Operates with HP 5150A, Opt 002 (BCD) digital recorder.

Power Consumption:            115 or 230 Vac +10%, 50 to 400 Hz, 1.5 watts

Dimensions
Size:                         130 mm W x 155 mm H x 279 mm D
                              (5.2 in x 6.1 in x 11.0 in)
Net Weight:                   2.3 kg (5.5 lb)
Shipping Weight:              4.6 kg (10 lb)

[ Key Literature ]

No literature is available online at this time.

[ Ordering ]

HP 432A Thermistor Power Meter Family Opt 001 Rechargeable battery installed, provides up to 20 hours of continuous operation Opt 002 Input connector placed on rear panel in parallel with front Opt 003 Input connector on rear panel only Opt 009 3.1-m (10-ft) Cable for 100-ohm or 200-ohm Sensor Opt 010 6.1-m (20-ft) Cable for 100-ohm or 200-ohm Sensor Opt 011 15.2-m (50-ft) Cable for 100-ohm or 200-ohm Sensor Opt 012 30.5-m (100-ft) Cable for 100-ohm or 200-ohm Sensor Opt 013 61-m (200-ft) Cable for 100-ohm 200-ohm Sensor Opt 100 100 Vac Operation, 48 to 66 Hz Opt 910 Extra Operating and Service Manual (HP 00432-90009) Opt W30 Extended Repair Service Opt W32 Calibration Service HP 8477A Power Meter Calibrator Opt W30 Extended Repair Service Opt W32 Calibration Service

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