Use Of Zero/Span Valves With Remote Contact Closure; Table 7-7: Z/S Valvem - Teledyne 9110AH Instruction Manual

TELEDYNE Model 9110AH NO

7.4 Use of Zero/Span Valves with Remote Contact Closure

The Zero/Span valve option can be operated using Remote Contact Closures provided on the
rear panel. See Figure 2-2 for connector location and pinout. There are 3 sets of contacts on the
rear panel. They operate the zero valve, LO span valve, and HI span valve. To operate the
valves, they must be held closed for at least 1 second. The valve will remain in operation for as
long as the contacts are closed. In order to operate the valves again, the contact closures should
be held open for at least 1 second, then may be closed again.
The default action is to do a span check when the valves are operated. A span check does not
calibrate the instrument when the valves are operated. To calibrate the M9110AH when the
valves are operated, go to the VARS section on the front panel menus. Press SETUP-MORE-
VARS, then scroll to DYN_ZERO,
DYN_LO_SPAN or DYN_HIGH_SPAN, and set the variable to ON. With the variable in the
ON state, the M9110AH will calibrate when the contact closure is released.
Table 7-7 shows what type of check is performed based on the settings of the three contact
closures.
Table 7-7: Z/S Valve Modes with Remote Contact Closure
External Zero
Contact Closure
Open
Open
Open
Closed
*Calibrate only if Dynamic Calibration Variable is ON
Analyzer Operator Manual, 01620, Rev. F
X
External LO Span
Contact Closure
Open
Closed
Open
Open
7-8
External HI Span
Contact Closure
Open
Open
Closed
Open
Operation
State when in
SAMPLE mode,
normal monitoring.
Low Span check or
calibrate*
High Span check or
calibrate*
Zero check or
calibrate*