Instruction Manual

TROUBLESHOOTING
Symptom Solution
The device has experienced an error with one of
the sensors. Navigate to “Advanced Settings” >
"Diagnostics" screen to view more information.
All zeros will be displayed if no error is
present. See "Display Navigation Guide", or the
applicable communications guide or consult
factory for troubleshooting help or replacement
element.
No output
Check wiring. Ensure power supply meets
requirements.
Reading
error
Verify control panel software is congured for
correct output scaling.
Verify accuracy of test instrument. Observe
installation and calibration guidelines.
Verify unit is located away from sources of hot/
cold.
Verify sensing element is inserted properly.
Perform calibration only if necessary.
SENVA TECHNICAL SUPPORT
Need further assistance? Call our toll-free number for live
technical support: [phone] or feel free to email us at
[e-mail]
CO CALIBRATION
Automatic Calibration feature:
The CO sensor will automatically baseline CO levels and
gradually make adjustments to compensate for sensor drift due
to long-term aging of the IR light source. In applications where
CO levels are continuously elevated, or spaces are occupied
day and night, it is recommended to use our dual channel CO
sensor with automatic calibration disabled.
Senva CO sensors are factory calibrated to controlled test
gases. No eld calibration is necessary or recommended.
However, to facilitate compliance with job requirements and
commissioning procedures, provisions for eld calibration are
provided:
1. Locate calibration instrument and sensor in close proximity
to each other in a controlled environment free of drafts,
people, and equipment to reduce inuence on CO and
temperature.
2. Compare output of sensor to calibration instrument, and
note dierence. (In 0-10V mode/2000ppm range, 1V =200ppm)
3. Refer to the "Setup-Display" section to adjust oset value
for CO as needed. Factory calibration may be restored by
setting oset back to 0.
In extreme cases where the sensor module has been damaged,
a new module may be installed in the eld. Consult factory for
replacement module and instructions.
Alarm Icon
on home
screen or
blinking AQ
Ring
TVOC OPERATION
Training Mode
The TVOC sensor has articial intelligence (AI) that allows it to
sense and understand dierent environments. This AI may take
up to 7 days to acclimate to an environment once installed. For
this reason, a TVOC reading is not included in the Air Quality
calculation until it has been powered for 7 days.
During this time, the sensor will go into "training mode"
and will not display or output a TVOC value. Instead, the
display will show "Training days" where "X" is how many
days the device has been in training mode and 7 days is the
expected duration. Once it reaches 7 days, a reading will be
shown. Using communications, the TVOC reading will show a
countdown from -7 to 0 days; once it hits zero the device will
switch into normal operation.
Device shown is in TVOC training mode.
Manual Calibration
No manual eld calibration is necessary. To maintain accuracy,
the TVOC sensor will be required to be exposed to fresh air
at least once every 10 days. This can be accomplished by
increasing airow in an area or by opening a window.
Scaling:
Senva’s TVOC sensor uses an Ethanol reading to determine a
raw TVOC value. Additionally, conversion from µg/m uses the
molecular weight of Ethanol. To scale based on a dierent gas
baseline, user may enter a scaling factor in TVOC Settings on
the display or using communications.
o
F
72
TVOC
Training
%RH
45
Good
Air Quality
Page 5 of 6