Teledyne 2000RS Operating Instructions Manual page 19

Introduction
50-Pin Equipment Interface Port:
 Analog Outputs: user selectable 0–1 VDC concentration
plus 0-1 VDC range ID, or isolated 4–20 mA DC plus 4-20
mA DC range ID (there cannot be both 0-1 vdc and 4-20 ma
dc at the same time).
 Alarm Connections: 2 concentration alarms and 1 system
alarm.
 Remote Span/Zero Digital inputs allow external control of
analyzer calibration.
 Calibration Contact: To notify external equipment that
instrument is being calibrated and readings are not
monitoring sample.
 Range ID Contacts: Four separate, dedicated, range relay
contacts. Low, Medium, High, Cal.
 Network I/O: Serial digital communications for local
network access. For future expansion. Not implemented at
this printing.
Optional:
Calibration Gas Ports (Auto Cal Option) Separate
fittings for zero, span and sample gas input, and internal
valves for automatically switching the gases.
Note: If you require highly accurate Auto-Cal timing, use external
Auto-Cal control where possible. The internal clock in the
Model 2000RS is accurate to 2-3 %. Accordingly, internally
scheduled calibrations can vary 2-3 % per day.
Teledyne Analytical Instruments
2000RS
6