Detcon DM-600IS - Manual (Page 6)

DM-600IS
DM-600IS Instruction Manual Rev 1.5.9 Page 2 of 37
1.0 DESCRIPTION
Detcon MicroSafe™ Model DM600IS, toxic sensors are nonintrusive “Smart” sensors designed to detect and
monitor for toxic gas in the ppm range. One of the primary features of the sensor is its method of automatic
calibration which guides the user through each step via instructions displayed on the backlit LCD. The sensor
features LED indicators for 2 ALARMS, FAULT and CAL status, field adjustable, fully programmable alarms
and provides relays for two alarms plus fault as standard. The sensor comes with two different outputs: analog
4-20 mA, and serial RS-485. These outputs allow for greater flexibility in system integration and installation.
The microprocessor supervised electronics are packaged as a universal plugin transmitter module that mates to
a standard connector board. Both are housed in an explosion proof condulet that includes a glass lens. A 16
character alpha/numeric indicator is used to display sensor readings as well as the sensor’s menu driven
features via a handheld programming magnet.
Typical ranges of detection are 0-10ppm, 0-25ppm, 0-50ppm, and 0-100ppm. Other ranges are available and
all ranges are covered by this manual. To determine sensor model number, reference the label located on the
enclosure cover.
To determine gas type and range, reference labeling on the intrinsically-safe sensor head.
1.1 Sensor Technology
The sensors are electrolytic chemical cells. Each cell consists of three electrodes embedded in an electrolyte
solution all housed beneath a diffusion membrane. Sensitivity to specific target gases is achieved by varying
composition of any combination of the sensor components. Good specificity is achieved in each sensor type.
The cells are diffusion limited via small capillary barriers resulting in long service life of up to 3 or more
years. The fuel cell is packaged as field replaceable plug-in sensor via gold plated pins. Pre-amplifier and
intrinsically safe barrier circuits are epoxy potted in the stainless steel housing and include the mating sockets
for the sensor.
◄Intrinsically Safe
Sensor Head