Teledyne 3010MA, Руководство по эксплуатации, Страница: 32 / 88

Part 1 Control Unit Model 3010MA
Teledyne Analytical Instruments
32
36 System Alarm, normally closed contact
20 System Alarm, moving contact
37 System Alarm, normally open contact
Digital Remote Cal Inputs: Accept 0 V (off) or 24 V dc (on) inputs
for remote control of calibration. (See Remote Calibration Protocol
below.) See Table 3-3 for pin connections.
Zero: Floating input. 5 to 24 V input across the + and – pins
puts the analyzer into the
Zero
mode. Either side may be
grounded at the source of the signal. 0 to 1 volt across the
terminals allows
Zero
mode to terminate when done. A
synchronous signal must open and close the external zero valve
appropriately.
Span: Floating input. 5 to 24 V input across the + and – pins
puts the analyzer into the Span mode. Either side may be
grounded at the source of the signal. 0 to 1 volt across the
terminals allows
Span
mode to terminate when done. A
synchronous signal must open and close external span valve
appropriately. See Figure 3-5 Remote Probe Connector.
(The –C option internal valves operate automatically.)
Cal Contact: This relay contact is closed while analyzer is
spanning and/or zeroing. (See Remote Calibration Protocol
below.)
Table 3-3: Remote Calibration Connections
Pin Function
9 + Remote Zero
11 – Remote Zero
10 + Remote Span
12 – Remote Span
40 Cal Contact
41 Cal Contact
Remote Calibration Protocol: To properly time the Digital Remote
Cal Inputs to the Model 3010MA Analyzer, the customer's controller
must monitor the Cal Relay Contact.