Teledyne 200AH 用户手册

 

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 M200AH 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 M200AH will calibrate when the contact closure is released. 

Table 7-9 shows what type of check is performed based on the settings of the three contact 
closures. 

Open Open  Open 

State when in SAMPLE mode, 
normal monitoring. 

Open Closed  Open  Low 

Span check or calibrate* 

Open 

Open 

Closed 

High Span check or calibrate* 

Closed Open 

Open 

Zero check or calibrate* 

 

*Calibrate only if Dynamic Calibration Variable is ON