USER MANUAL
SMALL-SIZE INFRARED GAS SENSOR MIPEX-02-3-RX-1.1 G
ESAT.100200.02.02 UM
September 23, 2021
Page 32 of 41
THE SOLE PROPERTY OF SIA MIPEX. ANY REPRODUCTION WITHOUT THE WRITTEN PERMISSION OF SIA MIPEX IS PROHIBITED.
Request syntax
USER
mode
OEM
mode
Response description
Command description
INDSIG OFF
no
yes
INDSIG OFF OK
Turns off displaying of
sensor status with nega-
tive values in concentra-
tion field.
INDSIG ON
no
yes
INDSIG ON OK
Turns on displaying of
sensor status with nega-
tive values in concentra-
tion field (see Table 13).
USERDATA?
yes
yes
Contains 59 bytes of
information
and
“0D”
symbol.
Returns
all
the
ten
numbers contained in user
section of sensor memory
separated from each other
with “0D” symbol.
USERDATAXX?
yes
yes
Contains
5
bytes
of
information
and
“0D”
symbol
Returns
a
number
contained in cell
XX
(00…09)
of
sensor
memory user section.
USERDATAXX YYYYY
no
yes
USERDATAXX YYYYY OK
Writes a number
YYYYY
(00000…99999) to cell
XX
(00...09)
of
sensor
memory user section.
Table 13. Negative values in concentration field while "INDSIG" mode is on
Concentration
value in ASCII
format
Concentration
value in hex
format
Status word
compliance
(see Table 16)
Description
Recommendations
-0001
8001
10
Sensor is warming up.
After power up, meas-
ured
concentration
value is displayed after
40 s, but sensor metro-
logical properties are
provided only after 120
s.
Do not perform span
calibration.
-0002
8002
31
Zero shifts to nega-
tive value.
Possibility of condensed
moisture
on
optical
elements. Dry sensor.
After drying, if this status
lasts longer than for 20
minutes
at
stable
conditions,
perform
zeroing (see Appendix
D.1
for
procedure
description).
-0003
8003
24
Dynamic temperature
mode; zero shifts to
negative value.
Do not perform span
calibration or zeroing.