Teledyne 7600, Operating Instructions Manual

Page: 112 / 126

Appendix Model 7600
Teledyne Analytical Instruments
112
are short-circuited. Indication of instanta-
neous values will not be held.
Range switching:
Range switching is available in manual,
auto, and remote modes. Only preset
switch method is effective.
Manual: Allows range to switch by key
operation.
Auto: Allows range to switch from low to
high range when 90%FS or more is
available in the low range.
Allows range to switch from high to low
range when 80%FS or less is available in
the low range.
Remote: No-voltage contact input (for
measurable components)
Allows range to switch via an external
signal when remote range switch input is
received.
When the contact input terminals for each
component are short-circuited, the first
range is selected, and it is switched to the
second range when the terminals are open.
Range identification signal:
The present measuring range is identified
by a contact signal.
The contact output terminals for each
component are short-circuited when the
first range is selected, and when the
second range is selected, the terminals are
open.
Auto calibration:
Auto calibration is carried out periodically
at the preset cycle.
When a standard gas cylinder for calibra-
tion and a solenoid valve for opening/clos-
ing the gas flow line are prepared
externally by the customer, calibration