Dissolved Oxygen Probe; Dissolved Oxygen Probe Connection; Dissolved Oxygen Probe Programming - Hach 900 MAX Instrument Manual

Section 5

5.4 Dissolved Oxygen Probe

5.4.1 Dissolved Oxygen Probe Connection

Pin
A
B
C
D

5.4.2 Dissolved Oxygen Probe Programming

Note: The membrane thickness
must be programmed into the
instrument. The instrument uses
this information to determine if the
sensor is generating a reasonable
current. Failure to program this
value may result in false error
conditions
Page 74
Dissolved Oxygen Probe
4. Attach the positive battery terminal to the terminal block screw labeled
"glass" and the negative battery terminal to the terminal block screw
labeled "ref."
5. After making all connections, measure the exact voltage on the "C" cell or
power supply with a voltmeter. Then press a key to continue. The sampler
displays the message "Waiting for ORP to Stabilize."
6. Once the reading is sufficiently stable enter a new millivolt level. The "C"
cell battery should be approximately 1500 mV (or 1.5 V) when new. Enter
the exact voltage of the current source in millivolts.
7. Press to store the new calibration values.
ACCEPT
8. Disconnect the "C" cell battery or regulated power supply from the ORP
input terminals.
9. Reconnect the ORP Probe leads to the input terminals.
This connection is for interfacing the optional D.O. probe to the
D.O./Conductivity Pre-Amp (Cat. No. 3369).
Table 10 D.O. Connections (J20)
Signal Description
DO - (neg)
DO + (pos)
Thermister
Thermister
Strain Relief Recommendation
A strain relief is recommended to protect the cable/probe junction during
application where the sensor will be thrown or tossed into liquid.
1. From the Main Menu, select
2. Highlight Select Inputs using the
3. Highlight D.O. using the
4. Press
CHANGE CHOICE
press .
ACCEPT
5. Enter a logging interval, then press
shown on the status bar.
6. Press
CHANGE CHOICE
sat). Press to continue.
ACCEPT
7. Select another channel to configure, press
or press to return to the Main Menu.
MAIN MENU
Wire Color
OPTIONS>ADVANCED OPTIONS>DATALOG.
and keys and press
UP DOWN
and keys, then press
UP DOWN
to cycle between Logged and Not Logged, then
. Valid logging intervals are
ACCEPT
to select the appropriate units (ppm, ppb, mg/L,
RETURN
Green
Red
Black
Yellow
.
SELECT
.
SELECT
to back up one step
8990options.fm