Section 4 Startup - Hach CODmax III User Manual

Device
Relay 1 and 2
Digital inputs
4-20 mA outputs 1 and 2
Modbus SC
SC (reserved)

Section 4 Startup

Complete the steps that follow each time the instrument connects to the power source. Make sure
that all of the electrical and plumbing connections are installed before startup.
1. Open the sample line to let sample flow through the analyzer.
2. Examine the plumbing for fluid leaks. Stop the leaks if found.
3. Make sure that the air circuit breaker switch is in the on position. Refer to
4. Push to close the analysis section. Listen to make sure that the panel moves fully into the latch.
5. Close the doors.
6. Supply power to the analyzer through a grounded electrical receptacle. Refer to
The display light comes on. When power is applied to the instrument for the first time, the
instrument shows the initialization guide. Refer to
Table 3 Wiring information
Connection
NO
COM
NC
G / BN
A / WH
B / BU
BK
GY
Initialization guide
Normally open
Normally closed
+
–
+
–
G Common signal
A
B
Common signal
Figure
on page 22.
Signal
Common
Positve
Negative
Positve
Negative
Signal A (–)
Signal B (+)
Signal A (–)
Signal B (+)
Not used
Not used
11.
Figure 11.
English 21