HYDROLOGICAL SERVICES Nitro HS-35 User manual

• Operates with a 12V
18Ah Battery, average
consumption is 14mA
(=> 50 days batt life -
based on 7 x 3 hr purges
and a 1m (3ft) water level
rise per day)
• A small 5 Watt Solar
panel is sufficient to keep
the battery fully charged.
• Operates with up to 300m
(900ft) of river line and
30m (100ft) head of wa-
ter.
The HS-35, when used with a
Dry Nitrogen source and the Gas
Chamber Orifice GC01, forms a
complete Hydrostatic Level Sen-
sor for measuring water level in
dams, rivers, canals and tanks
with up to 300m (900ft) of river
line and 30m (100ft) of water
head. The unit can be used with
any pressure transducer .
A dot point view of the product is
as follows :
• Must be used with a GCO
• Can be used with any
pressure transducer.
• Automatic Purge se-
quence :
1. Operate a 3 way valve to
isolate the user’s pressure
transducer.
2. Switch a valve to connect the
dry N2 gas bottle to the
GCO.
3. Purge for 1 secs.
4. Monitor the pressure for 25
secs.
5. Switch the valve back to
connect the transducer to the
GCO.
• Purge when :
1. Every 3 hours (fixed) and
2. When water level rises by
more than 100mm (4 inches)
or
3. Manual purge by operator.
• Falling water level – ex-
cess pressure vents auto-
matically from GCO – no
purging required.
• Pressure on transducer is
held constant during a
purge.
The “ Nitro” Model HS-35
INTRODUCTION
Designed & Manufactured
By
Hydrological Services Pty Ltd
Address:
48-50 Scrivener Street
Liverpool, NSW, 2170, Australia
Ph. 61 2 9601 2022 Fax. [phone]
Web: www.hydrologicalservices.com
Email: [email protected]
Hydrostatic Level Sensor “NITRO”
Export: 6/2/2008Bulletin 79, Edition 1
MODEL HS-35
Special points of
interest:
• Self Purging
• Ideal for high silt
areas
• Reduced lag be-
tween water level
rise and orifice
pressure
• Long period unat-
tended
• Low maintenance
• No bubble rates to
set up
• No bubble rates to
set up
• No desiccant or air-
dryers required
• Compact size
• Easy to install
Inside this bulletin:
Special Point of
Interest
1
Introduction 1
Company Details 1
Specifications 2
Schematics 2
Distributed By:

Power :
Operating Voltage : 12V DC Nominal
Recommended Battery : 12V DC Sealed Lead Acid (18Ah)
(This will provide approx 50 days continuous
operation.)
Low Battery cut-out : 10.0 V DC
Battery recharge recovery : 12.0V DC
Operation Range : Up to 30m (100ft) of water pressure head with a
max of 300m (900ft) of river line
Purge :
Gas Line Solenoid Current : 0.6Amps for 1 sec
Solenoid Current : 0.6 Amps for 27 secs
Electronics Quiescent : 10 mA
Average battery
consumption : 14mA continuous (based on 7 x 3hr purges and
a 1m water level rise per day)
Solar : A small 5Watt solar panel is sufficient to keep
the battery fully charged.
Purge Sequence : 1 secs - N2 gas valve
25 secs - solenoid valve
Once every 3 hours (fixed) and when the water
level increases by 100mm or a manually initi-
ated purge
Transducer Pressure
Connection : 6.35mm (1/4 inch) tube
River Line Connection : 9.52mm (3/8 inch) tube
Max River-line Length : 200m (600ft) using 3/8 in OD and 1/8 ID tubing
Operating Temperature
Range : -30
o
C to +70
o
C
Enclosure Size : 150mm x 200mm x 90mm (H x W x D)
6 inches x 8 inches x 3.5 inches
Weight : 1.8 kg (4 lbs)
SPECIFICATIONS
Page 2
MODEL HS-35
Typical Installation For HS-35
Nitro, Water Level System
Hut
WL3100
GCO
N2
Bottle
River
HS-35
12VDC,
18AH
Time
Water
Level
Purge cycles
3 hrs 3 hrs 3 hrs 3 hrs
100mm
rises 100mm
rises
Only 3 hr purge
when water is falling Purge every 100mm
when water is rising
© Copyright 2008, Hydrological Services preserves the right to change this bulletin at any time without notice