MNA0010, Revision B October 2014
29
A description of each mode:
3.1
RUN
Normal RUN mode is indicated
by a green LED. The
instrument is measuring the
concentration of the sample
gas and updating the display
and outputs accordingly.
NOTE:
The display will flash
(bright to dim) when out of range and then go to solid display when in range.
3.2
CALIBRATION
Calibration mode allows
the oxygen sensor to be
tuned to a gas of known
oxygen concentration. Flow
gas, then enter the cal
mode by pressing the
mode button once.
NOTE: DO NOT CALIBRATE WITH A ZERO GAS. SETTING ZERO WILL CREATE
ERROR IN THE MEASUREMENT CALCULATIONS!
When to Calibrate?
•
Whenever the sensor board is replaced.
•
At least once every 6 months.
•
Whenever a FAULT condition is encountered.
•
After POWER UP for the first time (wait 5 minutes to stabilize)
•
Whenever you are unsure about a oxygen concentration reading.
•
When you are switching Background Gases
How to calibrate the Model 7100P Portab
le analyzer ….
NOTE: Before powering up the model 7100, it is important to
purge the sensor of ambient air. This will facilitate a quick
initial response to ppm levels of oxygen .
The sensor used in the
model 7100P Portable analyzer is designed for use in PPM
concentrations of oxygen. If the analyzer is powered up while the
sensor is exposed to ambient air, then the sensor will saturate with oxygen and may require
up to 5 minutes recovery time once exposed to trace oxygen gases. To prevent this delay due
to saturation
, you should flow ppm level oxygen (or zero gas) to the sensor before power
up
.
MODE
RUN
FAULT
ALM 1
ALM 2
9.9
T
RACE
O
XYGEN
MODEL 7100 O
2
Analyzer
Mini-Zirconia
Sensor
NTRON
MODE
RUN
FAULT
ALM 1
ALM 2
9.9
T
RACE
O
XYGEN
MODEL 7100 O
2
Analyzer
Mini-Zirconia
Sensor
NTRON
!
!