Det-Tronics MOS H2S Gas Sensor - Manual (Page 19)

95-8532 1.4 17
Display
“YES EXT”
“YES CAL”
or
“NO EXT”
“NO CAL”
“4-20 CAL”
“NO”
“SET 4mA”
“CURRENT”
“SET 20mA”
“CURRENT”
“SET CAL”
“CURRENT”
function
Option to allow external reset button
to be used for calibration in addition
to or instead of Cal Magnet. When
“Yes” is selected, the external reset
input functions exactly like the Cal
Magnet.
Option to select a Current Loop
Output other than factory calibrated
4 to 20 ma.
Set the current output zero level.
Set the current output full scale
level.
Set the current output during
calibration and setup modes.
Description/action
• Press INCREASE or DECREASE to change the
setting.
• When the desired setting is displayed, press the
SETUP/ACCEPT button to program the setting
into the transmitter. Factory default setting
is for no - external reset button is not used for
calibration.
• Press the SETUP/ ACCEPT button to bypass the
4 to 20 ma calibration procedure and exit the
SETUP mode.
• Press DECREASE or INCREASE to change the
display to read “4-20 CAL” “YES.”
• Press the SETUP/ACCEPT button to program the
current loop.
• Press the INCREASE or DECREASE button to
change the zero level current output (indicated on
the dc current meter).
• When the desired output is indicated, press the
SETUP/ACCEPT button to program the setting
into the transmitter.
• Press the INCREASE or DECREASE button
to change the full scale current level output
(indicated on the dc current meter).
• When the desired output is indicated, press the
SETUP/ACCEPT button to program the setting
into the transmitter.
• Press the INCREASE or DECREASE button
to change the calibration current level output
(indicated on the dc current meter).
• When the desired output is indicated, press the
SETUP/ACCEPT button to program the setting
into the transmitter.
IMPORTANT
A dc current meter capable of measuring 4 to 20 ma must be connected to the current loop output for the
following three current loop adjustments. This can be accomplished by connecting a dc ammeter in series
with the load or by connecting a digital dc voltmeter across a known load resistance and calculating the
current flow using the formula: current (I) = voltage/load resistance.
Do not press INCREASE or DECREASE pushbuttons during Current Loop Cal without a current meter or
voltmeter connected to the current loop output as described above. Doing so will result in an uncalibrated
current loop.
Table 6—Infiniti Setup (Continued)