732B/734A
Instruction Manual
1-8
Output Adjustability
- 10V: 0.15 ppm resolution
- 1.018V: Set at nominal ±1 mV. No adjustment is provided.
The 10V adjustment is done with a set of four decade-control switches with a range of at
least 4 mV.
Retrace (Hysteresis) Error
The following table shows the change in 10V output voltage following a power outage
(with the battery turned off) with temperature held constant in the normal operating
range.
Period that Power is Turned Off Change in 10V Output Value
10 minutes or less ≤ ±0.1 ppm
10 minutes to 24 hours ≤ ±0.25 ppm
Stabilization Time Requirements
The following information specifies the warmup times required after ac line and battery
power has been turned off. The IN CAL indicator will be off, and recalibration will be
necessary. The previously specified retrace error specification can be used in the case of
brief power interruptions.
With no power interruption: No stabilization time is required after moving into
another environment.
Power off for less than 1 hour: 1-hour warmup required
Power off for 1 to 24 hours: 24-hour warmup required
Electromagnetic Compatibility
This instrument is designed to operate in Standards Laboratory environments where the
radio frequency (RF) environment is highly controlled. If used in environments with
field strengths >0.18 V/m, there could be errors in measurements.
Temperature Coefficient (TC) of Output
In the temperature range of 15°C to 35°C, the magnitude of the TC is bounded by the
following:
- 10V Output: TC ≤ 0.04 ppm/°C
- 1.018V Output: TC ≤ 0.1 ppm/°C
Load Regulation
10V Output Load Change Maximum 10V Output Change
0 mA to 12 mA (no load to full load) ±1 ppm
0 mA to 2 mA ±0.1 ppm
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