Detcon PI-700 0-500ppb - Manual (Page 6)

Model PI-700 0-500ppb
PI-700 0-500ppb Instruction Manual Rev. 0.0 Page 2 of 53
program switches located on either side of the LED Display are activated via a hand-held magnetic
programming tool, thus allowing non-intrusive operator interface with the ITM. Calibration can be
accomplished without declassifying the area. Electrical classifications are Class I, Division 1, Groups B C D
and are ATEX Approved for Class I, Zone 1, Group IIC area classifications..
Figure 2 ITM Circuit Functional Block Diagram
Program Switch #1
LED Display
Program Switch #2
PGM2
SPAN
PGM1
ZERO
MODEL
PI-700
detcon inc.
VOC
Figure 3 Sensor Assembly Front View
1.3 Modular Mechanical Design
The Model PI-700 Sensor Assembly is completely modular and is made up of four parts (See Figure 4 for
Assembly Break-away):
1) PI-700 Intelligent Transmitter Module (ITM)
2) Intelligent Plug-in Sensor (varies by range)
3) PI-700 Splash Guard Adapter with Integral Filter
4) Splash Guard.
NOTE: All metal components are constructed from electro polished 316 Stainless Steel in order to maximize
corrosion resistance in harsh environments.
I/O
Circuit
Protection
RS-485
4-20mA
Display
Micro-
Processor
Intrinsically
Safe Barrier
Analog 4-20mA Out
Modbus™ RS-485 Output
Power In
Power Supply
Intelligent
Plug-In
Sensor