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2. Operating Procedure
1. After power-up, select the desired output range. The 200mV, 2V, 20V,
and 24mA ranges can be selected by pressing the RANGE key until the
desired range is shown on the LCD readout.
2. Observe the proper polarity when connecting the output jacks. Red is
(+) and Black is (-).
3. Adjust output using the control keys.
When pressed, the keys select a digit on the LCD readout to be
scrolled. When these keys are pressed and held down, a blinking cursor
appears and covers up one of the digits indicating which digit is
selected. After a second more, the cursor starts to move in the direction
selected.
The
keys scroll the digit up or down, respectively. As the outputs
are scrolled, the integral LCD readout displays the voltage or current
present at the output jacks.
4. The SP1 or SP2 keys will store or recall a value when pressed.
To store a value in SP1 or SP2, scroll to the desired output. Press and
hold down the SP1 or SP2 keys until the word “STORED” flashes onto
the LCD readout.
To recall a value in SP1 or SP2: momentarily press the SP1 or SP2 keys,
and the value needed from that particular setpoint should appear on the
LCD display.
5. The voltage output jacks are disabled while in the current output mode.
Likewise, the current output jacks are disabled when in the voltage
output mode. Therefore, only one type of output, either voltage or current
can be simulated at one time.
6. The purpose of the RS-232 jack on the PCL422A is to allow data from
the PCL422A to be transferred to a data collection device such as a PC
or a printer. When connecting the PCL422A to a computer, the following
specifications will apply:
a. Baud Rate 2400
b. 8 data bits with 1 stop bit
c. No Parity
Other commands can be sent to the PCL422A from the computer to do all
of the functions such as range change, output adjust, setpoint control, etc.
NOTE: A custom RS-232 cable from OMEGA will be needed. The part
number is C232SJ and can be ordered directly from OMEGA.
When connected to a computer, the PCL422A will begin to send data as
soon as the calibrator is turned on.
