The 1007 is a handheld calibrator that can be used for potentiometric voltage measurement in addition to its operation as a millivolt source.

The null zero and sensitivity are adjustable via front panel controls. Maximum sensitivity enables null balance to resolve 3 microvolt.

Three output ranges are provided to give adjustable output values from 1 μV to 1 V with a basic 0.02 % accuracy.

For signal injection, the operator needs to switch on, check the battery condition, select the range, and set the required voltage using the thumbwheel switches.

The 1007 uses a precision reference diode and low temperature coefficient resistors to give a highly stable output.

Power is provided by 6 AA batteries. Battery life is several months, depending on usage.

The battery condition is monitored by an indicator mounted on the top of the unit.

The 1007 has up to 20 mA drive current and is short circuit and overload protected. An off/normal/reverse output polarity switch is provided.