The 7067 is a micro-processor based instrument for the calibration of voltage and current loop signals. It can operate in three modes:

a) Loop current/voltage source (simulating a transmitter and the loop supply)

b) Sink of loop current (simulating a transmitter)

c) Measurement of loop current/voltage (simulating a loop indicator)

Display is via a dot matrix LCD screen. User input is by 7 front panel buttons.
Source functions are a) Manual step, b) Auto step c) Ramp. In step function there are five calibration points, 0%, 25%, 50%, 75% and 100% of span. In ramp function the output ranges between 0% and 100% of span the ramp rate and dwell time are user programmable.

In source mode the range can be user programmed for any values between 0mA to 50mA, or 0V to 21V. For example a low point of 10mA and a high point of 50mA could be set giving a span of 40mA.

In measure mode only fixed ranges are available. Current and voltage is displayed in 5-digit format in mA or Volts. Alternatively the current may be displayed in % of span.
An automatic power-down feature is incorporated and turns the unit off after approximately 7 minutes if no buttons are pressed. If required the automatic power-down feature can be disabled in the user set-up.