Industrial Scientific TMX412, Инструкция по эксплуатации

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22
Shorting Wire
NOTE: The TMX412 must be calibrated whenever a
sensor is installed or replaced. All installed
sensor types are shown on the Sensor
Configuration screen during instrument start-up.
However, a fault condition will be indicated if the
instrument has not been calibrated for any of the
installed sensor types. When a new oxygen sensor
is installed, allow 15 minutes for it to stabilize
before attempting calibration. If the toxic sensor
is replaced with a different type or the
combustible sensor is reconfigured, the alarm
settings must be changed to reflect the
appropriate alarm settings for the sensor
installed.
8.5.1 TOXIC SENSOR REMOVAL/
REPLACEMENT
• To remove the toxic sensor, grasp the sensor and lift it
straight up. Use care to avoid bending the sensor pins.
WARNING: When removing the toxic sensor for
storage, connect a shorting wire to
the two pins as shown.
• New sensors are shipped with a shorting wire attached.
Remove the shorting wire from the new sensor.
• Immediately install the sensor in the instrument. Never
apply pressure to the area inside of the black O-Ring seal
at the top of the sensor.
8.5.2 COMBUSTIBLE SENSOR REMOVAL/
REPLACEMENT
• To remove the combustible sensor, grasp the sensor and
lift it straight up.
• When installing the combustible sensor, align the notch
on the sensor body with the polarizing pin on the
sensor board.
8.5.3 OXYGEN SENSOR REMOVAL/
REPLACEMENT
• Remove the two mounting screws and nylon washers
using the maintenance tool or small Phillips screwdriver.
• Bend the two mounting tabs out as shown before
installing the new sensor.
!
23
OXYGEN
LEL
Toxic Sensor 1 Toxic Sensor 2
Polarizing Pin
Combustible Gas
Sensor
Oxygen Sensor
Easy-to read
Liquid Crystal
Display
8.6 I
NSTRUMENT
R
EASSEMBLY
A
FTER
S
ERVICE
• Reassemble the instrument by aligning the two posts
with the corresponding openings in the circuit board.
Gently fit the instrument case halves together, making
certain that the gasket is properly seated, and the flex
cable is not pinched between the buzzer and the
instrument case top.
• Replace and tighten the three retaining screws until they
are firmly seated. Do not overtighten.
• Replace the battery and battery cover.