Changing the type of input signal on the PHC recorder
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This recorder is a multi-input device which permits the input for any channel to be changed to thermocouple, RTD or DC voltage input. Follow the procedure described below to change the input type.
Turn off the power to the unit.
Open the front door and remove the main unit in the manner shown in the drawings below.
Remove paper tray from unit by pressing the release button and pulling paper tray forward.
Loosen the lock screw (M4) inside the recorder using a Phillips type screwdriver.
Hold the lower base plate at the square hole and forcedly pull it forward. The recorder will be removed from the case.
Change the settings of the pins for individual channels on the internal printed circuit board. Use pliers to remove and insert pins.
After completing the hardware change, push the main unit back into its original place and screw back into position.
Change the input terminal wiring to make it correspond to the new input signal type. For DC current input, provide the input terminals with shunt resistors.
Refer to Section 7.8 in the manual and carry out the programming changes for each channel that has been modified.