Specification; Spare Parts And Accessories - Crowcon TXgard-Plus Instructions

i. Using a long instrument screwdriver, turn the relevant ALARM SET pot
mounted on the terminal board (see Diagrams 1 & 2) to adjust the alarm
level. Tripping of the ALARM 1 level relay is confirmed by the status LED
turning a steady red. Tripping of the ALARM 2 level relay is confirmed by
the Status LED flashing red.
j. Once the alarm level has been set, place end of 'CRO-Mag' over the 'UP'
or 'DOWN' arrow pads and reset the display to read zero.
k. Place the end of the 'CRO-Mag' over the 'MENU' pad to return the
detector to normal operation, ie. No decimal points displayed, backlight
off and the Status LED indicating steady green.
l. Check that the detector operates correctly by applying test gas as
necessary.
m. Switch off and isolate power to the detector.
n. Reset jumpers which may have been changed in step 'd' above.
o. Replace the amplifier and close the junction box, ensuring that all screws
have been re-fitted correctly.
p. Apply power to the detector and allow to stabilise before checking correct
operation.
q. Re-calibrate if necessary as per section 4.1.

5. SPARE PARTS AND ACCESSORIES

Please refer to the Sensor Replacement Label mounted on the outside of
the 96HD housing for the correct replacement part number.
Description
Complete 96HD sensor
Hydrogen sulphide
Carbon monoxide
Ammonia
Oxygen
Sulphur dioxide
M20 to 1/2" NPT adaptor
M20 to 3/4" NPT adaptor
Ceiling mounting bracket
Collector cone
Weatherproof cap
Sinter removal tool
Sinter assembly
Gasket 1
Gasket 2
Amplifier - toxic version
Amplifier - oxygen version
Terminal board
Relay board
Calibration gas
Loctite no. 243
This product has been tested and found to comply with the European Directive on EMC 89/336/EEC
Crowcon Detection Instruments Ltd, 2 Blacklands Way, Abingdon Business Park, Abingdon, Oxfordshire OX14 1DY, UK
Tel: +44 (0)1235 553057, Fax: +44 (0)1235 553062, email: sales@crowcon.com, internet: http://www.crowcon.com
Installation, operating and maintenance instructions, M07194-A4
Part no.
Sensor
housing with sensor only
(96HD/HS) S01750 E01229
(96HD/CO) S01751 E01344
(96HD/AM) S01752 E01618
(96HD/OX) S01753 E01488
(96HDSO) S01901 E01232
M02125
M02281
M01401
C01051
C01442
M01614
S01781
M04452
M04128
S01866
S01867
S01846
S01847
Contact Crowcon
Contact Crowcon

6. SPECIFICATION

Dimensions 200 x 115 x 115 mm (8" x 4
Weight 2.2 kg (4.8 lbs)
Material 96HD sensor housing: 316 Stainless steel
Junction box: Marine grade alloy
Temperature range -10–55°C (14–131°F)
Humidity range 0–99% RH, non condensing
Ingress protection IP66 with weatherproof cap
Explosion protection Flameproof
Approval codes CENELEC EEx d IIC T6
UL Class 1, Zones 1 & 2, AEx d IIC T6
Standards EN50014, EN50018, UL2279
Zones 1 and 2
Gas groups IIA, IIB and IIC
Operating voltage 10–30 Vdc
Operating current Relay version: 100 mA (maximum)
Non-relay version: 50 mA (maximum)
Detector output 4–20 mA source or sink selectable
0 mA
2 mA
4–20 mA
24 mA
Relay outputs 2 x Alarm relays SPNO (SPNC option)
1 x Fault relay SPNC (SPNO option)
Contact rating 1 A @ 30 Vdc
NOTES
1 1
"
/ x 4 / ")
2 2
= Fault
= Inhibit (4 mA option)
= 0–100% LEL
= Over range
89/336/EEC