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2
Operation
Response Test
C
Prior to use, the unit should first be tested for proper
response. With the detector operating, the unit
should be exposed to a sample of the target gas.
The display should show an increasing concentra-
tion. If not, do not use it for field measurements.
Sample Inlet Port
D
The Manning EC-P2 is provided with a quick disconnect
flexible extension wand. It will work with or without the
wand. When using the extension wand, the internal
walls must be kept dry. Water on the walls of the tubing
can potentially absorb the target gas. To dry, allow the
unit to pump dry, ambient air for 15 minutes.
Response/Recovery Time
E
Under normal conditions, the instrument will reach
90% of final value within two minutes. This is
dependent on concentration and temperature.
Recovery time for the sensor depends on duration
and concentration of exposure. Short exposures of
concentrations at the lower end of the target gas
range result in rapid recovery. Long exposures to
levels above the middle of the target gas range or
short exposures to levels exceeding the target gas
range can extend recovery times to hours. Repeated
exposures above the target gas range will reduce cell
life and should be avoided.
Interference Gases
F
The Manning EC-P2 is generally quite specific to the
target gas, but depending on the target gas, other
gases may cause a reading. See Appendix B for a
listing of potential interference gases for the various
SMART-CELLs.
Alarm Functions
G
The Manning EC-P2 provides both visible and
audible gas concentration alarms and system
alarms. An alarm condition will be displayed on the
normal operating screen as described on page 8.
Manning EC-P2 Sensor
19546 ECP2 07/09 REVG Copyright © 2009 Honeywell Analytics. All Rights Reserved.
continued
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In addition to the alarm indication code in the left side
of the screen, an alarm message will flash inter-
mittently on the screen, the audible beeper will sound
and the ACK button will appear. Pushing the ACK
button will silence the beeper and stop the display
flashing. The Alarm Indication Code will remain on
the left side of the screen until the alarm condition
clears.
Alarm setpoints are stored on the individual SMART-
CELL and can be changed by the user as described
in Section 4.
NOTE: An audible alarm single beep every
60 seconds indicates that either the Alkaline
C cell battery is low or the internal rechargeable
NiCad battery is low.
Display Resolution
H
The Manning EC-P2 displays gas concentration with
a resolution that depends upon the range of the unit.
Full scale ranges of 0-4.00 or below will provide
resolution of 0.01. Ranges from 0-5.0 up to 0-49.9 will
provide resolution of 0.1. Full scale ranges above 50
will have a resolution of 1.
Figure 3: Manifold Assembly
Outlet tube
Thumbscrews
barb fitting
(loosen to remove
manifold lid)
TEST UNIT PRIOR TO USE
Sensor
OUTLET
Sampling
(SMART-CELL)
wand
INLET
CAUTION
DO NOT BLOCK INLET
OR OUTLIET PORTS
Inlet fitting
Sensor
Manifold lid
alignment
groove
Sensor
alignment
pin
Filter Material
8
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