Connecting The Control Inputs; Table 3-5. Status Output Signals - Teledyne T101 Operation Manual

Teledyne ML – T101 Operation Manual
REAR PANEL STATUS
LABEL DEFINITION
1 SYSTEM OK
2 CONC VALID
3 HIGH RANGE
ZERO CAL
4
5 SPAN CAL
DIAG MODE
6
7 - 8 SPARE
D EMITTER BUS
SPARE
+ DC POWER
Digital
Ground

3.3.4. CONNECTING THE CONTROL INPUTS

Table 3-5. Status Output Signals

ON if no faults are present.
OFF any time the HOLD OFF feature is active, such as during calibration
or when other faults exist possibly invalidating the current concentration
measurement (example: sample flow rate is outside of acceptable limits).
ON if concentration measurement is valid.
ON if unit is in high range of the AUTO Range Mode
ON whenever the instrument's ZERO point is being calibrated.
ON whenever the instrument's SPAN point is being calibrated.
ON whenever the instrument is in DIAGNOSTIC mode
The emitters of the transistors on pins 1-8 are bussed together.
+ 5 VDC, 300 mA source (combined rating with Control Output, if used).
The ground level from the analyzer's internal DC power supplies
If you wish to use the analyzer to remotely activate the zero and span calibration modes,
several digital control inputs are provided through a 10-pin connector labeled CONTROL
IN on the analyzer's rear panel.
There are two methods for energizing the control inputs. The internal +5V available from
the pin labeled "+" is the most convenient method. However, if full isolation is required,
an external 5 VDC power supply should be used.
CONDITION
Getting Started
37