OHAUS SF42 (01) PDF Document

The OHAUS SF42 is shipped with the following items:

• AC power adapter

• Instruction manual

• A paper roll and a ribbon are loaded inside the printer before packing.

The printer should always be used in an environment which is free from corrosives, vibration, and temperature or humidity extremes. This product is intended for professional measurement and test use.

There are two indicators and two key buttons on the panel of the OHAUS SF42 Printer.

Indicators:

• The “P” indicator lights up when the power is on.

• The “SEL” indicator lights up when the printer enters On-line mode. It indicates if the printer is On/Off Line.

Buttons:

• SEL Button: This button is used to provide On/Off line selection. It toggles between ON and OFF. When On Line, the SEL indicator is lit. When Off Line, the indicator goes out.

• FEED Button: This button is used to advance the paper feed when pressed.

Operating the SEL and FEED key buttons can select three working modes: Self-Test, On/Off Line, and Paper Feed.

The 25 pin connector is located on the back of the printer. The serial interface is standard RS232C compatible.

Follow these steps to install the ribbon:

1. Open the cover.

2. Remove the used ribbon cassette from the printer.

3. Install a new ribbon cassette as follows: Put the left end slightly on the axle of the gear that is on the left side of the printer mechanism. Meanwhile, keep the right end little higher than the left. If the left end is not seated to the axle completely, press the knob of the cassette and turn it slowly clockwise.

4. After the left end of the cassette is in place (fully seated), press the right end of the cassette. Now, check that the ribbon is tight and on the inside of the cassette. Turn the knob clockwise again until the ribbon is on the outside of the cassette.

5. Close the cover of the printer.

The OHAUS SF42 Printer uses an external power adapter that supplies 9V dc rated at 600mA. Connect the power adapter to the printer and a suitable power source.

Before using the printer, load the paper as follows:

1. Open the cover on the printer.

2. Cut the end of the paper so the corners are angled inward.

3. Connect the Power Adapter to the printer and plug it into a suitable power source.

4. The SEL (SELect) button is an ON/OFF toggle. Press it to OFF. The SEL indicator is off.

5. Press and hold FEED button to feed the paper into the paper entry slot. The paper will gradually come out from the paper exit on the top of the printing mechanism. Wait a moment for a little bit of paper to appear, then release the FEED button to stop the paper feed.

6. Pull the paper end passing through the slot on the cover of the printer and close the cover.

To start the Self-Test:

1. Press the SEL button, then power on. The printer enters the Self-Test mode.

The Self-Test checks the condition of the printer. It lists the model number of the printer, all ANK characters with the order of fonts, then prints out interfacing type and Chinese Fonts. The printer will enter the On-Line state after it completes the Self-Test operation.

When power is on or after the printer quits from Self-Test, the printer enters the On Line state. At the same time, the SEL indicator lights up. Click the SEL button to Off Line, then the SEL indicator goes out. Click the SEL button again to return to On Line. The printer does not receive data from the host computer when Off Line.

Additionally, the SEL button can halt the printing operation. You can click the SEL button during the printing state. The printer prints out the last line and halts in the state of Off Line. Clicking the SEL button again will cause the printer to continue to print.

To enter the serial communication settings and set the Baud Rate:

1. Hold the FEED button down and power on.

2. Release the FEED button. The current Baud Rate will be printed.

3. Click the SEL button to select the Baud Rate. Each click will advance the setting which is printed as either: 1200, 2400, 4800 or 9600 bps.

4. After the Baud rate has been selected, click the FEED button to confirm the value. This will proceed to the Parity settings.

After confirming the Baud Rate setting:

1. Click the SEL button to select Parity. Each click will advance the setting which is printed as either: None, Odd, Even.

2. Click the FEED button to confirm the value of Parity.

After confirming the Parity setting:

1. Click the SEL button to select Data Length. Each click will advance the setting which is printed as either: 8 bits or 7 bits.

2. Click the FEED button to confirm the value of Data Length. The printer returns to Baud Rate setting again.

3. Clicking the SEL button again can repeat all settings. Switching off the power will quit the parameter setting.

To keep the printer operating properly, follow these maintenance procedures and precautions:

1. Do not dismantle the printer head.

2. Do not leave power on when not in use for a long period.

3. Switch off if the printer does not work normally.

4. Power supply must match the AC Adapter power requirements.

5. Do not lubricate the printer head.

6. Fluff and dust from paper are harmful to the printer head. Check and clear the head when replacing the paper roll.

7. When replacing the ribbon, do not press the cassette too hard, otherwise, the plastic wheel may be damaged.

8. Never use ribbon oil, it may damage the printer head.

If required by EMC standards in your region, install the noise filter on the cable used for connection to the parallel or serial interface:

1. Select the shielded cable for the printer connection.

2. Bend the cable and make its shape into a ring.

3. Open the noise filter and clamp it onto the ring. Reserve a 2 cm long cable between the filter and the D-type plug which will be connected to the printer interface.

The Watch-dog circuit is installed to improve anti-interference performance. If the printer is interfered with by ESD, BURST, and RF sources and enters an abnormal state exceeding the watch-dog timing, the printer restarts or resets automatically. The result is the same as a power reset: the receiving buffer is cleared and command parameters return to default values. The printer then enters normal operating mode.

If the equipment causes harmful interference to radio or television reception (determined by turning the equipment off and on), try the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and the receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.