Hach 900 MAX ユーザーズマニュアル

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Attach the positive battery terminal to the terminal block screw labeled 
“glass” and the negative battery terminal to the terminal block screw 
labeled “ref.”

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.” 

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. 

Press 

 to store the new calibration values.

Disconnect the “C” cell battery or regulated power supply from the ORP 
input terminals.

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).

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.

From the Main Menu, select 

Highlight Select Inputs using the 

 and 

keys and press 

.

Highlight D.O. using the 

 and 

keys, then press 

.

Press 

 to cycle between Logged and Not Logged, then 

press 

.

Enter a logging interval, then press 

. Valid logging intervals are 

shown on the status bar.

Press 

to select the appropriate units (ppm, ppb, mg/L, 

sat). Press 

 to continue.

Select another channel to configure, press 

 to back up one step 

or press 

 to return to the Main Menu.

A

DO - (neg)

Green

B

DO + (pos)

Red

C

Thermister

Black

D

Thermister

Yellow