ENMET PID-Guard - Manual (Page 4)

PID-G UARD ENMET Corporation
2
2.0 Components of the
PID-G
UARD
2.1 PID-G UARD elements
See Figure 1 for location of elements:
Feature Description
Enclosure A polycarbonate box, approximately 7 x 5 x 3, with a detachable front cover.
4 holes for mounting the enclosure to a vertical surface. Located at the corners of the bottom
of the enclosure, directly beneath the 4 front cover retaining screws. See Figure 3
Input Port The entrance for the air sample and calibration gas. The quick release fitting mates with one
on the optional Sample air hose and the calibration adapter.
Front Cover Detachable front cover of PID-G UARD with Display Panel. See Section 2.2 and Figure 1
There are 4 Screws that hold the front cover in place.
Sample Air Hose
(Optional) A five foot long hose to conduct a sample of the air from the source to the instrument.
The hose has a Female quick release fitting and regulator. See Figure 1a
Regulator
(Optional) To connect to the compressed air line. Sample pressure to the PID-G UARD should be set to
55 PSI . See Figure 1a
Output Port Sampled air out: Luer connection provided to connect to tubing
2.2 PID-G UARD Operational Features
The Display Panel is attached by a cable and is released by unscrewing the 4 screws located in the corners. After releasing the
panel, it is swung upward, exposing the interior of the enclosure. See Figure 1 for location of features.
Feature Description
Display A single line, 8 character LCD with backlight. Indicates the level of gas detected by sensor.
The numerical value of gas concentration and other information is displayed.
Audio Alarm(Horn) Audio alarm (105 dB at 30cm/12in). The audio alarm is on when the unit is in alarm.
Visual Indicators and
Alarms LED indicators:
Power / Fault Indicator LED, Green / Red
Alarm (3) Indicator LED, Red
Membrane Switches 2 Pushbutton Switches on front panel control the instrument maintenance functions. The
pushbutton switch locations are indicated by:
M ENU
↓: Advances the instrument display through operation information and maintenance
menus
S ELECT : Disables audio alarm temporally and
Selects the maintenance menu operations such as, Zero, Span, Exit menu or sets
proper calibration values for Zero or Span
See Section 4.0 and 5.0 for operational and maintenance flow charts.
Flowmeter A flow indicator located at the output of the sample flow stream, which indicates
quantitatively the flow of sample air or calibration gas through the instrument.
Three alarm points are preprogrammed into the PID-G UARD . At each alarm point, an LED on the front panel is activated.
These internal alarm settings are independent of the 4-20mA output alarm values that can be set at a controller. An optional
relay board is available that will activate 0.5 Amp relay contacts at each alarm point, plus a fault relay.