Use Of Zero/Span Valves Or Izs With Remote Contact Closure; Table 7-9: Izs Or Z/S - Teledyne 200A Instruction Manual

Teledyne API Model 200A NO
7.7 Use of Zero/Span Valves or IZS with Remote Contact
Closure
The Zero/Span valve or IZS options can be operated using Remote Contact Closures provided on
the rear panel. See Figure 2-2 for connector location and pinout. When the contacts are closed,
the analyzer will switch to zero or span mode. The contacts must remain closed for at least 1
second, and will remain in zero or span mode as long as the contacts are closed. If Dynamic
Zero/Span is enabled, the calibration is adjusted at the end of the zero or span time, otherwise
zero or span is just checked, not adjusted.
In order to do another remote check, both contact closures should be held open for at least 1
second, then may be set again. Table 7-9 shows what type of check is performed based on the
settings of the two contact closures.
Table 7-9: IZS or Z/S Valves Modes with Remote Contact Closure
Ext Zero CC
Contact Open
Contact Open
Contact Closed
* Calibrate only if Dynamic Calibration is enabled.
Analyzer Instruction Manual, 02246, Rev. F1
X
Ext Span CC
Contact Open
Contact Closed
Contact Open
7-11
Operation
State when in SAMPLE mode, normal monitoring
Span check or calibrate
Zero check or calibrate
*
*