HYDROSENSE HS2410
Revision 5.0
P a g e 11 | 27
9) For non-purged/pressurized models the outlet of the tube should be open to air,
not
submerged in
water or a process which would cause a backpressure. This could result in a restriction of the
effluent flow and spillage within the lower chamber.
For purged/pressurized models, a slight and constant backpressure is required to maintain a
cabinet pressure. To accomplish this, submerge the effluent tubing approximately 10 cm below the
water surface or run the outlet tube with a slight upward grade or drain trap prior to the downward
outfall. Be sure the tube never rises higher than the bottom of the chamber outlet.
10) The Sample Chamber must be mounted indoors or in a heated housing when sample freezing may
occur. The inlet and outlet tubing must not be exposed to freezing environments. For outdoor
installation, the unit must be sun and rain shielded.
11) The controller operates using 120VAC, 50/60Hz, 220VAC, 50/60Hz or 24 VDC as ordered.
12) The monitor provides LED indication of the relay status. The relays are dry contacts and will accept
AC or DC inputs. Setpoint alarm levels are on Relay 1 & 2. Relay 3 is maintenance alarm, which
indicates offset drift and that cleaning, or re-calibration is necessary. Relay 4 indicates a Lamp
Replacement requirement or controller failure.
13) A 4-20 mA DC output signal proportional to the PPM level is provided. This is a signal capable of
driving 900 ohms. Remote indicators, receiving devices and their distances should be considered
when choosing a location for the Arjay Controller.
14) A RS-485 Modbus output is provided. This can be used to link to computers and other equipment.
Optional HART and Fieldbus Foundation are available.
15) Shielded wiring is required for the output alarms and signals to avoid EMI and RFI interference from
other equipment near the sample unit.
16) The Monitor is housed in a Type 4X 316 Stainless Steel enclosure. Extremes in temperature and
humidity should be avoided. Indoor or an environmentally mounted instrument shelter is
recommended.
17)
3.2
GLOSSARY OF SYMBOLS
Attention, consult accompanying documents
Attention, veuillez consulter les documents ci-joints.
Protective Earth
Terre de protection
Fuse
Coupe-circuit; fusible
Direct Current (DC)
Courant continu
Normally open relay contacts
Contacts travail
Normally closed relay contacts
Contacts Repos
Power off
ArróÕ (mise hors tension)
Power on
Marche (mise sous tension)
L
Live
Sous tension
N
Neutral
Neutre
G
Ground
Terre
