Detcon DM-200 - Manual (Page 27)

Model DM-200
DM-200 Instruction Manual Rev. 2.0 Page 23 of 40
NOTE: This is critical because each ISM is pre-set to accept a specific electrochemical sensor.
Take your replacement sensor and observe the gold pin mating pattern. Once aligned, press the
sensor into the sockets and replace the sensor rain cover with a firm twist to create the water
tight seal.
NOTE: If the sensor splashguard adapter cannot be removed, it maybe locked down by the
setscrew or may have been intentionally, permanently bonded in place. In this case, the entire
ISM must be replaced.
Intelligent
Sensor
Housing
Electrochemical cell
Grasp and pull down to remove
Splashguard adapter
Twist counter-clockwise
to remove
Intelligent
Sensor
Module
(ISM)
(With support
Electronics)
Figure 16 Sensor Cell Replacement
4.3 Display Contrast Adjust
Detcon UniTox™ sensors feature a 2-line, 16-character liquid crystal display. Like most LCDs, character
contrast can be affected by viewing angle and temperature. Temperature compensation circuitry included in
the UniTox™ design will compensate for this characteristic; however temperature or operating voltage
extremes may still cause a shift in the contrast. Display contrast can be adjusted by the user if necessary.
To adjust the display contrast, remove the enclosure cover, remove transmitter, and use a small screwdriver to
turn the blue contrast potentiometer adjust screw located on the side of the UTM circuit board (refer Figure 5).
Adjust per preference. The adjustment location is marked “CONTRAST”. Secure transmitter in condulet.
Replace enclosure cover.