Det-Tronics U9500 Infiniti Gas Transmitter - Manual (Page 17)

95-8444 15 10.1
Setpoints
The Infiniti Transmitter has three independent alarm
outputs (low, high and auxiliary), with field selectable
setpoints. For both relay and non-relay models, these
setpoints correspond to the HI, AUX, and LO ALARM
indicators on the display.
Calibration Gas Concentration
The programmed calibration gas concentration is also
displayed and adjustable. This known concentration
(typically one half of the instrument’s full scale detection
range) of the actual gas or vapor that is expected to be
detected should be used to calibrate the system.
Det-Tronics calibration gas should be used to ensure
proper system calibration performance and accuracy.
iMPOrTanT
The calibration gas concentration setting typically
matches the concentration of the gas used to
perform the calibration (printed on label of
calibration gas cylinder). Refer to the “Calibration”
section of this manual for details.
Latching or Non-latching Relays
The Low, Auxiliary and High alarm relays are
programmable as a group for either latching or non-
latching operation. “LATCH” indicates that they will
latch upon alarm and the unit must be reset to clear.
“nonLATCH” indicates that they will automatically clear
when the alarm clears.
Alarm Relays Normally Energized or Normally
De-Energized
The three alarm relays (High, Low and Auxiliary) are
programmed as a group. “DE-ENERG” indicates that
the three alarm relays will be normally de-energized and
will energize upon alarm. “ENERG” indicates that the
three alarm relays will be normally energized and will de-
energize upon alarm.
Automatic or Manual Calibration
Manual calibration requires that the operator use the Cal
magnet to activate the CAL/RESET switch, signaling an
acceptance of the present calibration reading. Auto Cal
is described in the “Calibration” section of this manual.
External Calibration
Calibration procedures are normally initiated and
executed using the Cal Magnet to activate the CAL/
RESET switch. Choose “YES EXT CAL” during the setup
procedure to allow the additional use of the external reset
input terminal for initiating and executing a calibration
procedure. See Figure 9 for switch wiring.
4-20 Milliampere Calibration
The 4 to 20 mA current loop is factory calibrated. Perform
the “YES 4-20 CAL” function in the Setup procedure if a
recalibration is required. A current meter must be placed
in the loop to perform this function.
Calibration Current
The current output during Calibration and while in the
Setup mode is factory set for 2 mA. Perform the “SET
CAL CURRENT” function in the Setup procedure if an
output current other than 2 mA is required.
Refer to the “Setup Procedure” section for complete
instructions.
INFINITI SENSOR COMPATIBILITY
Refer to Table 6 for a list of acceptable sensor inputs to
the Infiniti by model.
INFINITI OUTPUTS
Refer to Table 7 for a description of Infiniti standard 4 to
20 mA outputs and relay output programming options.
mODES OF OPERATION
Refer to Table 8 for a description of Infiniti modes of
operation.