3.4-1 Zeroing with Absolute Pressure Modules.
To zero, adjust the calibrator to read a known pressure, such as barometric
pressure. 
To adjust the calibrator, follow these steps:
1. Enter the pressure zeroing menu.
2. Select [ZERO  ]. [SET REFERENCE ABOVE] will appear. Enter the
pressure using the keypad.
3. The calibrator stores the Barometric zero offset in non-volatile memory. 
The zero offset is stored for one absolute pressure module at a time. If a
new absolute module is connected this process must be repeated. 
4. Using Source Modes (Lower Display)
The calibrator can generate calibrated signals for testing and calibrating
process instruments. It can source voltages, currents, resistances,
frequencies, pulses, and the electrical output of RTD and thermocouple
temperature sensors.
4.1 Setting 0 % and 100 % Output Parameters 
To set the 0 % and 100 % points, use the following steps:
1. Select the lower display [LOWER] from Main Menu, and choose the
desired primary parameter.
2. Select output [OUT] from the input/output control, and enter the desired
value. For example select [VOLTS OUT].
3. Enter 5 V with the keypad, and instead of pressing the ENTER key,
press the 0% key. This will set 5 V as the 0 % point.
4. Enter 20 V and press the 100% key. This will set 20 V as the 100 %
point.
5. Use the 25% key to cycle 5 V and 20 V in 25 % increments.
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