User`s guide

Troubleshooting

nfusion Accuracy

To ensure infusion accuracy always use new syringe(s) and measure syringe bore diameter and enter actual

imensions in millimeters (mm) using the Custom Syringe entry option. Additionally, make sure that the

guide rods and lead screw are properly lubricated.

RS-232 Difficulties

Verify that the baud rates, data framing parameters, data bits, parity, and stop bits on all devices are the

ame. Verify flow control (handshaking) is set to None. If an address is set to other than address Ø, make

sure commands and queries are prefixed with the address. Make sure straight-through pinning is used for

the cables; do not use null-modem cables.

Erase/Clear Disc:

There may be an instance where you want to delete all of your custom methods from the pump. There may

also be instances where you may need to delete/clear the disc in order to power up the pump. To do so:

• Turn the pump on.

• When the start-up screen appears, press the 4 corners of the display in a clockwise order starting at

the top left. After each corner is correctly pressed, it will turn dark gray.

• Press yes to confirm or wait 5 seconds to allow the pump to start normally without clearing the disc.

• There is a 5 second time limit for each press of the screen. If the time limit expires, the pump will

start normally without clearing the disc.

Figure 96: Press the 4 corners of the start-up screen display in a clockwise order to delete/clear the disc .

✐

NOTE: It is recommended that you save your methods periodically by uploading

them to a PC.

Harvard Apparatus PHD ULTRA

™

Syringe Pump Series User's Manual

Publication 5419-002-Rev-A

113

ppendices