beautypg.com

Teledyne 3010TA - Split architecture trace oxygen analyzer User Manual

Page 27

background image

Oxygen Analyzer

Part I: Control Unit

Part I: 3-5

Alarm Relays: The three alarm-circuit connectors are spring terminals

for making connections to internal alarm relay contacts. Each provides a set
of Form C contacts for each type of alarm. Each has both normally open and
normally closed contact connections. The contact connections are indicated
by diagrams on the rear panel. They are capable of switching up to 3 am-
peres at 250 V ac into a resistive load. See Figure 3-6. The connectors are:

Threshold Alarm 1:

• Can be configured as high (actuates when concen-

tration is above threshold), or low (actuates when
concentration is below threshold).
• Can be configured as fail-safe or non-fail-safe.
• Can be configured as latching or nonlatching.
• Can be configured out (defeated).

Threshold Alarm 2:

• Can be configured as high (actuates when concen-

tration is above threshold), or low (actuates when
concentration is below threshold).

• Can be configured as fail-safe or non-fail-safe.

• Can be configured as latching or nonlatching.
• Can be configured out (defeated).

System Alarm:

Actuates when DC power supplied to circuits is

unacceptable in one or more parameters. Permanently
configured as fail-safe and latching. Cannot be de-
feated. Actuates if self test fails.

(Reset by pressing

I/O

button to remove power. Then

press

I/O

again and any other button EXCEPT

System

to resume.

Further detail can be found in chapter 4, section 4-5.

Figure 3-6: Types of Relay Contacts