Zeiss HUMPHREY 720i User Manual - page 23

INTRODUCTION / INSTRUMENT SETUP

1-15

REV. B 02/03 PN 51680-1

HUMPHREY FIELD ANALYZER II -

 i

series

Trackball, mouse,

It is usually possible to use a Microsoft

™

-compatible serial trackball, mouse, or other external

or other input device

input device with your HFA II. These devices may be used as an alternative to pressing the

touch screen. They may be used in conjunction with the optional external keyboard. The

keyboard is not necessary to utilize these devices. For simplicity in describing the feature, the

term “trackball” will be used to represent any compatible input device. The serial trackball

is connected to the Mouse port on the back of the HFA II. The HFA II must be turned off when

attaching or removing any input device. See Section 2 for use of the trackball.

External VGA monitor

Your HFA II allows you to connect an external VGA monitor. Commands issued with the

keyboard and trackball / mouse can be seen on the external screen. Touch screen capability is

not available on the external monitor. The HFA II touch screen remains available for use when

using the external monitor. Output to the external monitor will display in black & white, even

when using a color monitor. Connection of the VGA monitor is made to the port found on the

back of the HFA II. See Figures 1.7 and 1.8. Use the VGA connection.

Surge protectors

Carl Zeiss Meditec recommends the use of surge protectors or UPS (Uninterruptable

Power Supply) systems to help isolate the HFA II from power surges or fluctuations. The HFA II

is very sensitive to line voltage changes and may experience database problems if subjected to

brownouts, power outages or surges of voltage. Hospitals, surgery centers, and offices with

instruments which consume large amounts of power, such as lasers, should be especially

careful to plug the HFA II directly into a UPS or adequate surge protector. Plugging the power

table into the UPS may not be adequate protection. Carl Zeiss Meditec recommends a

system with a rating of 450 volt amps or greater.

Connection of

External devices connect to the HFA II at the rear of the instrument and are hidden from view

external devices

behind a panel. Figures 1.7 and 1.8 show the location and identification of many of the

connectors previously mentioned. A diagram next to the panel helps to identify each port.

External input devices such as the glidepad, trackball, mouse and the keyboard need a PS/2

style plug for connection to the HFA II. Use the Data Transfer connection to plug in an HFA I for

serial transfer of data. Also use the Data Transfer port for connection of PC-based communica-

tions (Ex: Ensemble). Use the VGA for connection of any external VGA monitor.

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