Section 6
Page 6 - 10
MODEL 346 INSTALLATION AND OPERATION MANUAL
HA243821
Issue 5 Mar 98
6.3.1 CALIBRATION PAGES (Cont.)
CALIBRATION PROCEDURE
Change Cal?
Cal Retrans
Operation of the enter key allows the relevant channel to be selected using the up and down arrows.
Cal Retrans?
1
Once the required channel has been selected, a further operation of the enter key calls the ‘confirm’ page.
Cal Retrans?
ENTER to confirm
A final operation of the enter key causes the calibration to take place, during which process, a ‘Wait’ message
appears at the display. Once all the relevant channels have been calibrated, the outputs should be discon-
nected from the input channels, and any signal wiring connected.
6.4 PRINTING ADJUSTMENTS
6.4.1 DOT INTENSITY ADJUSTMENT
If the recorder is mounted with the rear of the case lowered in a sloping panel, it may be necessary to increase
the printhead force to regain dot intensity lost as a result of panel angle. Conversely, if the rear of the case is
raised, it may be desirable to decrease dot intensity to obtain the sharpest printing and longest pen life.
Access to the pen force adjustment potentiometer is made through a vertical slot located just behind the voltage
selector switch. Rotating the potentiometer adjustment screw clockwise increases dotting force, and vice-
versa. Force measurement is carried out with a deflection type gram gauge as follows:
Enter the Calibration Menu and choose ‘Ann. Carriage’.
With the annotator pen slowly dotting at the left end, release the chart cassette latch. Place the gauge under a
coloured tip to measure the force. The correct force range is 6 to 9 grams.
