Det-Tronics MOS H2S Gas Sensor User Manual
Page 12
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1.4
10
Duration of
CaL/RESET
Switch activation
function
1 Second
Resets the Infiniti transmitter
2 - 3 Seconds
Enters the Setpoint Display Mode
7 Seconds
Enters the Calibration Mode
Table 2—CAL/RESET Switch and Calibration Magnet Function
Display/Indicator
Description
PPM
This display is always on and functions as a power indicator.
The display provides a continuous reading of the sensor input in both the Normal and
Calibrate modes.
In the event of a fault, it identifies the nature of the fault with a fault message.
In other operating modes it shows the alarm setpoints and programmed calibration
gas concentration.
A negative zero drift condition is indicated by a minus (–) sign in the left hand digit.
In the event of an over-range condition, the display will continue to track the sensor
output as long as the over-range condition exists.
*
Alarm History Indicator
Asterisk indicates an alarm (any one) has activated since last reset.
Blank indicates no alarm has energized since last reset.
n
High Alarm Status Indicator
Solid black square indicates that the high alarm threshold has been exceeded.
For relay models, this means that the relay output has activated.
Blank indicates no alarm.
n
Auxiliary Alarm Status Indicator Solid black square indicates that the auxiliary alarm threshold has been exceeded.
For relay models, this means that the relay output has activated.
Blank indicates no alarm.
n
Low Alarm
Solid black square indicates that the low alarm threshold has been exceeded.
For relay models, this means that the relay output has activated.
Blank indicates no alarm.
INCREASE
Used to move to next higher setting during system programming.
ms
SETUP
Used to initiate Setup routine, to accept reading displayed, and cycle to the next
m
programming step during Setup (system programming).
ACCEPT
DECREASE
Used to move to next lower setting during system programming.
tm
CAL/RESET
Used for non-intrusive calibration and transmitter reset.
Activated by Cal Magnet from outside the Infiniti enclosure.
Table 1—Display And Controls