YSI Incorporated
Model 5000/5100 Service Manual
20
Set Test Box to:
Resistor input, J5 Pins 2 & 3
Display Reading
A-2
88.2k
Ω
±0.1%
100.0 ±0.1%
B-2
111.42k
Ω
±0.1%
79.1 ±0.2%
C-2
250.0k
Ω
±0.1%
35.3 ±0.2%
D-2 Infinity
0.0
±0.1%
3.
Oxygen Range Check - Mg/L Range (Salinity set at 0.0)
A.
Set test box to A-2 position allow the display to stabilize, set the IBT
to
the
CALIBRATE, DO CAL
mode again. Temperature still at 10
o
C.
B.
Press
the
NEXT
soft-key once. The display should have the last digit of the
mg/L number flashing.
C.
Press the
UP, DOWN
and
DIGIT
soft keys as necessary for the display to
read 11.28 Mg/L. Press the
ENTER
key to store the value.
D.
Perform the following checks for Mg/L 0
2
:
Set Test Box to:
Resistor input, J5 Pins 2 & 3
Display Reading
A-2
88.2k
Ω
±0.1%
11.28 ±0.02 Mg/L
B-2
111.42k
Ω
±0.1%
8.92 ±0.02 Mg/L
C-2
250.0k
Ω
±0.1%
3.97 ±0.02 Mg/L
D-2
Infinity
0.00 ±0.01 Mg/L
4.
Salinity Compensation Check
A.
Set test box to A-2 position Press the
DO CAL
soft key to enter DO CAL
mode again. Press the
NEXT
soft-key twice. Press the
UP, DOWN
and
DIGIT
soft keys as necessary until the display reads 10.0 ppt. The Mg/L
display should read 10.58± .02 Mg/L.
B.
Set the salinity value to 35.0. The display should read 9.02 ±.02 Mg/L.
C.
Press
the
MODE
key to leave CALIBRATION mode without saving the
changes.
5.
Polarizing Voltage Check
A.
Set test box to position F-1.
B.
Connect a millivolt meter to the test box red and black binding posts ( Same
as, J5 Pins 2 & 3). The reading should be 800 mv ±5%.
