Teledyne 7500ZA - Infrared Gas Analyzer - Manual (Page 109)

NDIR Gas Analyzer Specifications
Teledyne Analytical Instruments 93
9.1.2 Standard Functions
Output Signal Hold: Output signals are held unchanged during
manual and auto calibrations when HOLD
function is ON.
The values held are those just before start
of calibration mode or setting value.
User selectable.
Indication of instantaneous values will not
be held.
Range Switching: Range switch function is available in
manual, auto, and remote modes. Only
preset switch method is effective.
Manual: Allows range to switch by key operation.
Auto: Automatically switched from first range to
second range when the measured value
exceeds 90%FS of first range.
Automatically switched from second
range to first range when the measured
value drops to 80% or less first range.
Remote (option): Voltage contact input allows the range to
switch via an external signal when a
remote range switch input is received.
When the contact input terminals for each
component are input voltage, the first
range is selected, and it is switched to the
second range when the terminals are open.
* The switch range values are settable
between the first range and second range
values (low/high range values).