YSI Pro1020 - Manual (Page 5)

2 3
Figure 1. Pro1020 with battery cover removed. Notice
battery symbols indicating polarities.
The waterproof instrument case is sealed at the factory and
is not to be opened, except by factory-authorized service
technicians. Do not attempt to separate the two halves of the
instrument case as this may damage the instrument, break the
waterproof seal, and will void the warranty.
i
KEY PAD
Figure 2, Keypad
1
2
3
4
5
6
Number Key Description
1 Calibrate
Press and hold for 3 seconds to calibrate.
Opens Calibrate menu
from the Run screen.
2 Up Arrow
Use to navigate through menus, to
navigate through box options along
the bottom of the Run screen and
to increase numerical inputs.
3 Power and Backlight
Press once to turn instrument on. Press a
second time to turn backlight on. Press a
third time to turn backlight off. Press and
hold for 3 seconds to turn instrument off.
4 Menu
Press to enter the System Setup
menu from the Run screen.
5 Enter
Press to confirm entries and selections.
6 Down Arrow
Use to navigate through menus, to
navigate through box options at
the bottom of the Run screen and
to decrease numerical inputs.
CONNECTING THE SENSOR AND CABLE
“Bulkhead” refers to the sensor-end of the probe/cable assembly where
an ion selective electrode (ISE - either pH or ORP) and DO (galvanic
or polarographic) sensor are installed (figure 3). The temperature
sensor is located next to the sensor ports on the bulkhead and is not
replaceable.