Publication 5390-001 Revision B
9
Har
v
ard Appar
atus Model 33
T
win Syr
inge Pump User's Man
ual
Entering Data
Set Keys
The keys in this group are used to modify or review settings of the pumps control
data.
To review
the current setting of a control data item, simply hold down the rele-
vant key and the data setting will appear in the display.
To modify
a data setting, first press then release the green SET key
.
The display will
then read “SET”. Press the key in the SET key group of the data item that is to be mod-
ified. The display will show the current setting. Data is entered into the pump by
either entering a numerical value or, in the case of entering a baud rate, by scrolling
through a menu of choices. Always press ENTER to terminate each data request by the
pump.
When entering a numerical value, the LEDs corresponding to the data being entered
will blink. Using the yellow data entry keys on the right side of the keypad (see Figure
3) enter the new data value. Up to five digit numbers are accepted for rates and diam-
eters, including up to four decimal places. Entering more than five digits will clear the
previous five digits in the display. Press the green ENTER key when the desired data
value is displayed.
If the data value entered is outside the pump’s operating parameters, the display will
read “oor” meaning “Out of Range”. Pressing any key will restore the display with the
original data value. Enter another data value within the pump’s parameters or just
press ENTER to reuse the original data value.
The data value entered can be reviewed as described above.
Note: Certain data items
have multiple settings.
For these, after the ENTER key is pressed, the display will
prompt you for the additional information. Various rules apply to when, what and how
data can be set at various times. See the relevant section for further details.
Toggle Keys
The keys in this group, when pressed successively, select different states. Each state
change is accompanied by a corresponding change in status LED display.
To operate, Pump 33 needs to know the diameter(s) of the syringes, the rate(s) of
pumping, pumping directions, and the mode of operation. Except for Proportional
mode, syringe 2 is assumed to be the same diameter as syringe 1 and will pump at
same rate as syringe 1.
