Honeywell Sensepoint HT Quick Start Manual

6. FAULT FINDING

The following table provides a list of possible faults related to the sensor
together with possible causes and remedies.
F a u t l C a u s e R / e m e d y
Sensor reads non zero Gas could be present, ensure
all the time there is no combustible gas in the
atmosphere.
Sensor reads non zero Adjust the control system zero
when no gas is present setting.
Sensor reads low when Adjust the control system span
gas is applied setting.
Sensor reads high when Adjust the control system span
gas is applied setting.
Sensor reads zero when 1. Check the wiring.
gas is applied 2. Check that the protective disc
has been removed from the
filter housing.
3. Check that the filter is not
dirty/obstructed.
4. Replace the sensor if
poisoning is suspected.
11
Quick Start Guide
MAN0622 Issue 01 January 03
2106M0523
SENSEPOINT HT
COMBUSTIBLE GAS SENSOR
Sensepoint HT
Combustible Gas Sensor
total environmental solutions
7. CERTIFICATION
The following BASEEFA certification information is imprinted on adjacent
faces in two separate blocks on the hexagonal part of the sensor body.
Manufacturer's
trademark & address
Product name
Identification number
of ATEX notified body
CE mark
- conforms to all
Year of manufacture/
applicable European
serial number
directives
Certification number
Explosion protection
mark and equipment
group & category
Certification
code
Certified ambient
Caution
temperature range
12
1. INTRODUCTION
The Sensepoint High Temperature (HT) Combustible Gas Sensor is a sealed
disposable sensor for the detection of flammable gases. It must be fitted into a
suitably approved Exe or Exd high temperature junction box (e.g. Feel Flameproof
Enclosures) fitted with an approved cable gland for external wiring (e.g. Peppers
Cable Glands, Series A3LF or CR3 CROLOCK Series).
The sensor features a Filter Housing that retains a stainless steel mesh filter. It
employs a catalytic pellistor sensor device which is used as part of a bridge
measuring circuit.
Sensepoint HT is certified for hazardous areas to EN50014/EN50018 and is
protected against water and dust ingress to IP66/67. The sensor is available in
M20, M25 and 3/4 NPT thread versions. The sensor accepts accessories from a
specified range (see Accessories & Spare Parts).
Information notices
The types of information notices used throughout this handbook are as
follows:
WARNINGS
Indicates hazardous or unsafe practice that could result in severe
injury or death to personnel.
Caution: Indicates hazardous or unsafe practice which could
result in minor injury to personnel, or product or
property damage.
Note Provides useful/helpful/additional information.
If more information outside the scope of this technical handbook is
required please contact Honeywell Analytics.
Associated Documents
Sensepoint Gas Sensors Technical Handbook Part No: 2106M0502
1

8. SPECIFICATIONS

i D m e s n o i n : s S e e d a i g a r m n i n I t s l l a t a
section.
Operating temperature range: -40°C to +150°C.
Operating humidity range: 20% to 90% RH continuous.
10% to 99% RH intermittent - non
condensing.
Operating pressure range: 75 to 110 k Pa.
W r a m u p i t m : e L e s s h t a n 1 0 m n i u e t . s
V o a t l g e a r n g : e 2 9 . V o t 3 5 . V r b d i g e ( t a
Power consumption: 700mW.
S g i n l a o u p t u : t m V r b d i g . e
Calibration flow rate: Recommended between 1 and
1.5 l/min.
P o s i o n n i : g T h e e s s n n i g e e l m e n s t m
become inactive after extensive
exposure to silicones,
halogenated hydrocarbons,
heavy metals or sulphur
compounds.
Expected operating life: 5 years.
P I r t a n i : g P I 6 5 s a t n d r a ; d P I 6 6 6 / 7
Weather Protection.
C : E T h e e s s n r o c o m i l p s e i w
relevant CE directives.
II II
ATEX Certification: 2G EEx d C T3
Tamb -40 o C to +150 o C
Baseefa02ATEX0242X
13
2. SAFETY
WARNINGS
1. This unit is intended for use at a normal, or reduced, levels of
atmospheric oxygen and pressure only, i.e. less than 21% oxygen
and less than 1.1 bar. Oxygen deficient atmospheres (less than
10%V/V) may suppress the sensor output.
2. Refer to local or national regulations relative to installation at the
site. For Europe see EN50073 and EN60079-14.
3. Operators should be fully aware of the action to be taken if the gas
concentration exceeds the alarm level.
4. Installation should consider not only the best placing for gas leakage
related to potential leak points, gas characteristics and ventilation,
but also where the potential of mechanical damage is minimized or
avoided.
5. Only assessed for ATEX for ignition hazards.
CAUTIONS
1. Atmospheres above 100% LEL may suppress the sensor reading.
2. Do not modify or alter the sensor construction as essential safety
requirements may be invalidated.
3. Install using suitably approved and certified Exe or Exd high temperature
junction box, connectors and glands.
4. Dispose of in accordance with local disposal regulations.
Materials used - Stainless Steel.
2
9. ACCESSORIES & SPARE PARTS
o i n
D e s c i r t p o i n
Complete replacement sensor:
• M 2 0 e v s r o i n
• M 2 5 e v s r o i n
• 3 4 / N P T e v s r o i n
S a t n i e l s s s e t l e t l i f r e
F t l i r e H o s u n i g
High Temperature Junction Box
2 0 0 m A . )
High Temperature Weather Protection
y a
i w h t
h t
14
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www.honeywell.com
Issue 1 12/2005
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07-07
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