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Specifications Model 7500ZA
Teledyne Analytical Instruments 94
9.1.3 Optional Functions
Remote Output Holding:
Output signal is held at the last value or
preset value by a voltage input to the
remote output holding input terminals.
Holding is maintained while the voltage is
input to the terminals. Indication of
instantaneous values are not held.
Range Identification Signal:
The present measuring range is identified
by a contact position.The contact output
terminals close for each component when
the first range is selected, and open when
the second range is selected.
Auto Calibration:
Auto calibration is carried out periodically
at the preset cycle. When a standard gas
cylinder for calibration and a solenoid
valve for opening/closing the gas flow line
are installed externally by the customer,
calibration will be carried out using the
solenoid valve drive contacts for zero and
span calibration and will be cycled on/off
sequentially at the set auto calibration
timing.
Auto Cal Cycle Setting: Auto calibration cycle is user defined.
Setting is variable within 1 to 99 hours (in
increments of 1 hour) or 1 to 40 days (in
increments of 1 day).
Gas Flow Time Setting: The time for flowing each calibration gas
in auto calibration is user defined and
settable between 60 to 900 seconds (in
increments of 1 second).
Auto Cal Remote Start: Auto calibration starts by opening the auto
cal remote start input terminal after short