HYDROLAB HL Series User manual

DOC026.97.80348
HL Series Sonde
04/2017, Edition 2
User Manual
Bedienungsanleitung
Manuale d'uso
Manuel d'utilisation
Manual de usuario
Manual do Usuário
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English..............................................................................................................................3
Deutsch.......................................................................................................................... 27
Italiano............................................................................................................................ 53
Français......................................................................................................................... 78
Español........................................................................................................................ 104
Português.................................................................................................................... 129
中文............................................................................................................................... 155
日本語........................................................................................................................... 177
Polski............................................................................................................................ 202
2

Table of contents
Specifications on page 3
General information on page 4
Startup on page 8
Operation on page 11
Maintenance on page 19
Troubleshooting on page 23
Replacement parts and accessories on page 23
Specifications
Specifications are subject to change without notice.
Specification Details
Dimensions HL4: ∅ 4.44 cm (1.75 in.) without rubber bumpers; ∅ 5.33 cm (2.1 in.) with rubber
bumpers. Length—51.43 cm (20.25 in.) with no internal battery pack and standard
sensor guard; 66.36 cm (26.125 in.) with no internal battery pack and extended sensor
guard; 62.23 cm (24.5 in.) with internal battery pack and standard sensor guard;
77.787 cm (30.625 in.) with internal battery pack and extended sensor guard
HL7: ∅ 8.9 cm (3.5 in.) without rubber bumpers; ∅ 9.6 cm (3.78 in.) with rubber
bumpers. Length—66.4 cm (26.1 in.)
Weight HL4: 2.2 kg (5 lb) with internal battery pack, one D-cell battery and storage/calibration
cup with no liquid
HL7: 4.5 kg (10 lb) with four D-cell batteries, storage/calibration cup with no liquid
Power requirements HL4: 6–24 VDC (12 VDC nominal) applied to the communications module, 12 VDC:
250 mW average, 18 W peak
HL7: 6–24 VDC (12 VDC nominal) applied to the communications module, 12 VDC:
2.0 W average, 24 W peak
Internal battery pack1HL4: One internal alkaline D-cell battery, non-rechargeable. Approximately 75 days of
use with a 15-minute logging interval and the default warm-up time with depth,
temperature, conductivity, pH and LDO sensors installed and at room temperature.
HL7: Four internal alkaline D-cell batteries, non-rechargeable. Approximately 90 days of
use with a 15-minute logging interval and the default warm-up time with temperature,
conductivity, pH, LDO, chlorophyll a, blue-green algae (fresh water) and turbidity
sensors installed, a central cleaning brush set to do one revolution and the sensors at
room temperature.
Operating
temperature2–5 to 50 °C (23 to 122 °F), non-freezing
Storage temperature 1 to 50 °C (34 to 122 °F)
Depth 200 m (656 ft) maximum
Note: Some sensors cannot be used at 200 m (656 ft). Refer to the sensor documentation for the
sensor depth specifications.
Tensile strength
(maximum)
Mooring cap: 68 kg (150 lb); deployment cable: 227 kg (500 lb)
Sensors HL4: Temperature sensor, four external sensor ports and optional internal depth sensor
HL7: Temperature sensor, seven external sensor ports and optional internal depth
sensor
Refer to the sensor documentation for sensor specifications.
Communications Communications module: USB, SDI-12, RS232 Modbus, RS485 Modbus and
RS232 TTY
1Optional for the HL4
2Operation outside of this temperature range can result in mechanical damage or faulty
electronic performance.
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Specification Details
Logging 4 GB of internal memory3; 1 second interval minimum
Certification CE marked. Other certifications are subject to change. Contact the manufacturer.
General information
In no event will the manufacturer be liable for direct, indirect, special, incidental or consequential
damages resulting from any defect or omission in this manual. The manufacturer reserves the right to
make changes in this manual and the products it describes at any time, without notice or obligation.
Revised editions are found on the manufacturer’s website.
Safety information
N O T I C E
The manufacturer is not responsible for any damages due to misapplication or misuse of this product including,
without limitation, direct, incidental and consequential damages, and disclaims such damages to the full extent
permitted under applicable law. The user is solely responsible to identify critical application risks and install
appropriate mechanisms to protect processes during a possible equipment malfunction.
Please read this entire manual before unpacking, setting up or operating this equipment. Pay
attention to all danger and caution statements. Failure to do so could result in serious injury to the
operator or damage to the equipment.
Make sure that the protection provided by this equipment is not impaired. Do not use or install this
equipment in any manner other than that specified in this manual.
Use of hazard information
D A N G E R
Indicates a potentially or imminently hazardous situation which, if not avoided, will result in death or serious injury.
WARNING
Indicates a potentially or imminently hazardous situation which, if not avoided, could result in death or serious
injury.
CAUTION
Indicates a potentially hazardous situation that may result in minor or moderate injury.
N O T I C E
Indicates a situation which, if not avoided, may cause damage to the instrument. Information that requires special
emphasis.
Precautionary labels
Read all labels and tags attached to the instrument. Personal injury or damage to the instrument
could occur if not observed. A symbol on the instrument is referenced in the manual with a
precautionary statement.
3Sufficient memory to keep 5 years of continuous measurements with a 15-minute logging
interval
4 English

This symbol, if noted on the instrument, references the instruction manual for operation and/or safety
information.
Electrical equipment marked with this symbol may not be disposed of in European domestic or public
disposal systems. Return old or end-of-life equipment to the manufacturer for disposal at no charge to
the user.
Certification
Canadian Radio Interference-Causing Equipment Regulation, IECS-003, Class A:
Supporting test records reside with the manufacturer.
This Class A digital apparatus meets all requirements of the Canadian Interference-Causing
Equipment Regulations.
Cet appareil numérique de classe A répond à toutes les exigences de la réglementation canadienne
sur les équipements provoquant des interférences.
FCC Part 15, Class "A" Limits
Supporting test records reside with the manufacturer. The device complies with Part 15 of the FCC
Rules. Operation is subject to the following conditions:
1. The equipment may not cause harmful interference.
2. The equipment must accept any interference received, including interference that may cause
undesired operation.
Changes or modifications to this equipment not expressly approved by the party responsible for
compliance could void the user's authority to operate the equipment. This equipment has been tested
and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC rules.
These limits are designed to provide reasonable protection against harmful interference when the
equipment is operated in a commercial environment. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in accordance with the instruction
manual, may cause harmful interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference, in which case the user will be required to
correct the interference at their expense. The following techniques can be used to reduce
interference problems:
1. Disconnect the equipment from its power source to verify that it is or is not the source of the
interference.
2. If the equipment is connected to the same outlet as the device experiencing interference, connect
the equipment to a different outlet.
3. Move the equipment away from the device receiving the interference.
4. Reposition the receiving antenna for the device receiving the interference.
5. Try combinations of the above.
Product overview
N O T I C E
Do not use the HL series sonde in water that contains contamination that will cause damage to the sensors or the
housing (e.g., extreme acids or bases, high concentrations of organic solvents, oil/grease, toxic metals or
radioactive waters).
The HL series sonde is used for spot measuring or unattended monitoring of environmental water
sources (fresh and salt water). Refer to Figure 1 and Figure 2. The parameters measured by the
sonde are identified on the sonde and the sensor settings screen of the Hydrolab Operating
Software.
The HL4 sonde has a temperature sensor, four external sensor ports and an optional internal depth
sensor. The four external sensor ports can include a maximum of four different sensors.
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The HL7 sonde has a temperature sensor, seven external sensor ports and an optional internal
depth sensor. The seven external sensor ports can include a maximum of seven different sensors or
six different sensors and the optional central cleaning brush.
Refer to the sensor settings screen of the Hydrolab Operating Software to identify the sensors
installed. All sensors are installed at the factory and are not user-replaceable without authorization
from the manufacturer.
Figure 1 Instrument overview—HL4 sonde
1 Calibration cap for the storage/calibration cup 6 Middle rubber bumper (2x)6
2 Storage/Calibration cup47 Battery compartment7
3 Sensors in clear pH 4 buffer 8 End rubber bumper (2x)6
4 Locking screw (2x)59 Connector
5 Housing 10 Mooring cap
Figure 2 Instrument overview—HL7 sonde
1 Calibration cap for the storage/calibration cup 6 Housing
2 Storage/Calibration cup 7 End rubber bumper (2x)6
3 Sensors in clear pH 4 buffer 8 Connector
4 Middle rubber bumper69 Mooring cap
5 Locking screw (3x)5
Product components
Make sure that all components have been received. Refer to Figure 3 or Figure 4. If any items are
missing or damaged, contact the manufacturer or a sales representative immediately.
4The standard version is shown.
5For manufacturer use only
6Remove the middle bumpers and end bumpers as necessary to use the instrument in a narrow
space such as a well.
7Units with an internal battery pack only
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Figure 3 Instrument components—HL4 sonde
1 AC power adapter 6 Sensor maintenance kit(s)10
2 Calibration cable87 Hydrolab Operating Software DVD
3 HL4 sonde 8 USB communications module
4 D-cell alkaline battery99 Sensor guard with weight11
5 Silicone grease packet, 0.25 oz
8Not for use in water. Instrument damage will occur.
9Supplied with units with an internal battery pack
10 Supplied with some sensors.
11 The standard version is shown.
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Figure 4 Instrument components—HL7 sonde
1 AC power adapter 6 Sensor maintenance kit(s)10
2 Calibration cable87 Hydrolab Operating Software DVD
3 HL7 sonde 8 USB communications module
4 D-cell alkaline batteries (4x) 9 Sensor guard with weight
5 Silicone grease packet, 0.25 oz
Startup
Install the battery—HL4 sonde
WARNING
Explosion hazard. Incorrect battery installation can cause the release of explosive gases. Be sure that
the battery is of the approved chemical type and is inserted in the correct orientation.
For instruments with an internal battery pack, install the supplied D-cell battery. Refer to Figure 5.
Figure 5 Install the battery
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Install the batteries—HL7 sonde
WARNING
Explosion hazard. Incorrect battery installation can cause the release of explosive gases. Be sure that
the batteries are of the same approved chemical type and are inserted in the correct orientation. Do not
mix new and used batteries. Do not mix batteries from different manufacturers. Do not use damaged
batteries.
Install the four D-cell batteries supplied. Refer to the illustrated steps that follow.
When the last battery is installed the battery indicator light flashes green. If the indicator light flashes
red, the batteries do not have sufficient power.
Install the software
Install the Hydrolab Operating Software on a PC.
Items to collect:
• PC with Windows XP SP3 or newer
English 9

• Hydrolab Operating Software DVD
1. Put the DVD in the PC. The installation program starts.
2. Complete the steps in the software prompts to install the software on the PC.
Connect to the PC
Connect the instrument to the PC.
Items to collect:
• PC with Hydrolab Operating Software
• Calibration cable or optional deployment cable
• Communications module
• Power adapter12
1. Connect the instrument to the PC. Refer to Figure 6.
Turn the bottom of the mooring cap to remove it from the sonde. The top of the mooring cap does
not turn when the mooring cap is installed.
Note: Figure 6 shows the HL4 sonde. The steps are the same for the HL7 sonde.
To connect to a different power adapter or communications module than those shown, refer to the
documentation supplied with the power adapter or the communications module.
Note: An external power connection is optional for instruments with an internal battery pack. The battery(s) is
not used when external power is used.
2. At initial installation and each time a different USB port on the PC is used:
a. Windows prompts that a new device is found and opens a wizard window. Select No, not this
time to search for software, then click Next.
b. Select Install the software automatically (Recommended), then click Next. No DVD is
necessary.
Windows installs the software driver for the communications module.
3. Start the Hydrolab Operating Software. The connected instrument shows in the Connect to
Device field.
Note: If step 2 is not done at initial installation, the instrument will not be shown in the Connect to Device field.
4. Select the instrument, then click Connect.
12 Optional for instruments with an internal battery pack
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Figure 6 Connect the instrument to the PC
Operation
Configuration
Refer to the Hydrolab Operating Software Manual to configure the software, instrument and sensor
settings. To look at the Hydrolab Operating Software Manual, start the Hydrolab Operating Software,
click Help and select Hydrolab Operating Software Help.
Calibration
CAUTION
Chemical exposure hazard. Obey laboratory safety procedures and wear all of the personal protective
equipment appropriate to the chemicals that are handled. Refer to the current safety data sheets
(MSDS/SDS) for safety protocols.
CAUTION
Chemical exposure hazard. Dispose of chemicals and wastes in accordance with local, regional and
national regulations.
Calibrate the sensors before initial use, at regular intervals and after sensor maintenance or
modifications. Periodically, do a calibration check to make sure that measurements are still within
tolerance range.
Refer to the Hydrolab Operating Software Manual for instructions on how to do the tasks that follow:
• Start a sensor calibration.
• Start a sensor calibration check.
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• Set the calibration mode.
• Select the measurement units shown during calibration and calibration checks.
• Look at the calibration history.
To look at the Hydrolab Operating Software Manual, start the Hydrolab Operating Software, click
Help and select Hydrolab Operating Software Help.
When a calibration or a calibration check is started, the step-by-step instructions for the sensor show
on the display.
Prepare the sensors for calibration
Before calibration, always rinse the storage/calibration cup and clean the sensors to prevent
contamination of the calibration standards.
1. Rinse the storage/calibration cup with clean water.
2. Clean the sensors. Refer to the sensor documentation for instructions.
3. Rinse the sensors at least three times with deionized water. Refer to Figure 7.
Note: Figure 7 shows the HL4 sonde. The steps are the same for the HL7 sonde.
4. Rinse the sensors at least two times with a calibration standard. Refer to Figure 7.
For the best results, discard the deionized water and calibration standard after each rinse.
Figure 7 Rinse the sensors
Deployment guidelines
N O T I C E
Always install the mooring cap or connect the deployment cable to the instrument before deployment to keep the
connector dry. Do not use the calibration cable for deployment because the connector will get wet.
N O T I C E
Always install the sensor guard before deployment or sensor damage can occur.
• Do not apply more than 68 kg (150 lb) of additional weight to the instrument when the mooring cap
is used.
• Do not apply more than 113 kg (250 lb) of additional weight to the instrument when the
deployment cable is used.
• Do not hang weight from the sensor guard. Refer to Specifications on page 3 for the tensile
strength of the mooring cap and deployment cable.
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Cable care
• Lubricate the sealing surface of the mooring cap and the optional deployment cable with silicone
grease on a cotton swab at regular intervals and as necessary.
• Keep all non-waterproof cables (all cables except the deployment cable) in a clean, dry and non-
corrosive environment. If a cable gets dirty or wet, clean and/or air dry the cable before use.
• Do not put non-waterproof cables in a coil any tighter than 30.5 cm (12 in.) in diameter or cable
damage can occur.
• Do not put a knot in cables or use clips to mark a depth.
• Do not bend or pull the deployment cable over pulleys with less than 10 cm (4 in.) radius or 20 cm
(8 in.) in diameter.
• Use a powered or hand-cranked reel with electrical slip-rings to lower and raise the instrument if
the cables are very long. A lighter reel without slip-rings for shorter cables can be used.
Short-term (attended) deployment
N O T I C E
Do not put the instrument where the deployment cable could be cut or damaged by boat propellers or other
moving objects.
Deployment with a PC
Items to collect:
• PC with Hydrolab Operating Software
• Sensor guard
• Deployment cable
• USB communications module
• Power adapter13
1. Connect the instrument to the PC. Refer to Connect to the PC on page 10. Make sure to use the
deployment cable and not the calibration cable.
2. Remove the storage/calibration cup. Refer to Figure 8. Keep the storage/calibration cup for later
use.
Note: Figure 8 shows the HL4 sonde. The steps are the same for the HL7 sonde.
3. Install the sensor guard. Refer to Figure 8.
Do not let the sensors become dry.
4. Lower the instrument into the water to be measured. For the best results, make sure that all of the
instrument is in the water.
5. Click Monitoring to view real-time measurements. Refer to the Hydrolab Operating Software
Manual to capture measurements and/or change the view.
Note: To look at the Hydrolab Operating Software Manual, start the Hydrolab Operating Software, click Help
and select Hydrolab Operating Software Help.
When measurements are complete, prepare the instrument for travel. Refer to Prepare for storage or
travel on page 22.
13 Optional for instruments with an internal battery pack
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Figure 8 Install the sensor guard
Deployment with a flow cell
WARNING
Personal injury hazard. Make sure that the sample pressure is less than 103 kPa (15 psig).
For process or pump-through monitoring, install the optional flow cell on the sonde and push the
sample water through the flow cell. Refer to Figure 9.
Make sure that the water pressure in the flow cell is not more than 103 kPa (15 psig) or the flow cell
can break and cause injury.
Items to collect:
• PC with Hydrolab Operating Software or the Surveyor HL handheld controller
• Deployment cable
• Flow cell
• Tubing, ½-in.
• Water filter (optional)
• Water pump or siphon (optional)
• USB communications module (if a PC is used)
• Power adapter14
1. To use a PC, connect the instrument to the PC. Refer to Connect to the PC on page 10. Make
sure to use the deployment cable and not the calibration cable.
2. To use a Surveyor HL, connect the instrument to a Surveyor HL. Refer to the Surveyor HL User
Manual. Make sure to use the deployment cable and not the calibration cable.
3. Remove the storage/calibration cup. Keep the storage/calibration cup for later use.
4. Install the optional flow cell. Refer to Figure 9. Do not let the sensors become dry.
5. Connect two pieces of ½-in. tubing to the sample in and sample out ports.
6. Attach the open end of the sample out tubing to an open drain or a collection container.
7. Put the open end of the sample in tubing in the sample water. Remove unwanted material from
the sample water with a filter as necessary.
8. If possible, invert the sonde so the bubbles are removed from the sensors and go out the sample
out port.
9. Start the flow of sample water to the flow cell.
10. Click Monitoring to view real-time measurements. Refer to the Hydrolab Operating Software
Manual or the Surveyor HL User Manual as applicable to capture measurements and/or change
the view.
Note: To look at the Hydrolab Operating Software Manual, start the Hydrolab Operating Software, click Help
and select Hydrolab Operating Software Help.
14 Optional for instruments with an internal battery pack
14 English

When measurements are complete, prepare the instrument for travel. Refer to Prepare for storage or
travel on page 22.
Figure 9 Install a flow cell
1 Sample out 4 Flow cell for HL7
2 Flow cell for HL4 5 Sample in
3 Flow cell for HL4 with an extended sensor
Long-term (unattended) deployment
Deployment with a mooring cap
Only instruments with an internal battery pack can be deployed with a mooring cap.
Items to collect:
• PC with Hydrolab Operating Software
• Sensor guard
• Mooring cap
• Rope or wire line
• Calibration cable
• USB communications module
English 15

• Power adapter15
1. In the office or the field, add a new log to the instrument.
Measurements are saved to the new log according to the selected measurement interval and
date range.
a. Connect the instrument to a PC. Refer to Connect to the PC on page 10.
b. Click Logging, then add a new log. Refer to Logging in the online help.
c. Select File>Disconnect from Device to disconnect the instrument from the PC.
Note: As an alternative, click Devices, select the instrument, then click Disconnect.
d. Disconnect the calibration cable from the instrument.
2. Install the mooring cap on the instrument. Refer to Figure 10. Turn the bottom of the mooring cap
to install it.
Note: Figure 10 shows the HL4 sonde. The steps are the same for the HL7 sonde.
3. In the field, attach a rope or wire line to the mooring cap and/or the bail (HL7 sonde only). Refer
to Figure 10.
4. Remove the storage/calibration cup. Refer to Figure 8 on page 14. Keep the storage/calibration
cup for later use.
5. Install the sensor guard. Refer to Figure 8 on page 14.
Do not let the sensors become dry.
6. Lower the instrument into the water to be measured. For the best results, make sure that all of the
instrument is in the water.
7. Attach the instrument to a buoy, anchor or structure. Refer to Attach to a buoy, anchor or
structure on page 18.
When deployment is complete, prepare the instrument for travel. Refer to Prepare for storage or
travel on page 22.
Figure 10 Install the mooring cap
Deployment with a data acquisition system or controller
To remotely collect real-time measurements from the instrument, connect the instrument to a data
acquisition system (i.e., data logger or modem) or a controller with an applicable communications
module.
The instrument stays in low-power (sleep) mode until it receives a command from the external device
to switch on, complete a measurement and transmit the measured parameters back to the external
device. Refer to the online help for SDI-12 commands and TTY commands supported by the
instrument.
Configure the communications module
15 Optional for instruments with an internal battery pack
16 English

Items to collect:
• PC with Hydrolab Operating Software
• Communications module
1. In the office or the field, connect the applicable communications module to a USB port on the PC.
2. Start the Hydrolab Operating Software. The connected communications module shows in the
Connect to Device field.
3. Select the communications module, then click Connect. The configuration windows for the
communications module shows.
4. Configure the communications module. Refer to Configuration in the online help.
5. When configuration is completed, disconnect the communications cable from the PC.
a. Select File>Disconnect from Device to disconnect the communications cable from the PC.
Note: As an alternative, click Devices, select the communications cable, then click Disconnect.
b. Disconnect the communications cable from the PC.
Connect the communications module
Items to collect:
• Data acquisition system or controller
• Communications module (configured)
• External power source, 6-24 VDC (12 VDC nominal) 16
1. In the field, connect the communications module to the data acquisition system or controller.
Refer to the documentation supplied with the communications module for wiring information.
Refer to Data transmission and power wiring on page 17 for the wiring requirements for data
transmission.
2. If the data acquisition system or controller cannot supply power to the communications module,
connect an external power source to the communications module. Refer to Data transmission and
power wiring on page 17 for the wiring requirements for external power.
Data transmission and power wiring
To connect data transmission lines to the communications module, make sure that the transmission
cable is sufficient for the operating current and will transfer the data without distortion. For up to
305 m (1000 ft) of cable, three 26 AWG wires are sufficient.
To connect external power to the communications module, make sure to use two 18 AWG wires for
power. Smaller power wires can be used if the power supply is near the instrument.
Instrument deployment
Items to collect:
• Deployment cable
• Sensor guard
1. Connect the deployment cable to the communications module. Make sure to use the deployment
cable and not the calibration cable.
2. Connect the deployment cable to the instrument.
3. Remove the storage/calibration cup and install the sensor guard. Keep the storage/calibration cup
for later use. Refer to Figure 8 on page 14. Do not let the sensors become dry.
16 Optional for instruments with an internal battery pack. Not used when the data acquisition
system or the controller can supply power to the communications module.
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4. Lower the instrument into the water to be measured. For the best results, make sure that all of the
instrument is in the water. Do not put the communications module in the water.
5. Attach the instrument and cabling to a structure. Refer to Attach to a buoy, anchor or structure
on page 18.
When deployment is complete, prepare the instrument for travel. Refer to Prepare for storage or
travel on page 22.
Attach to a buoy, anchor or structure
N O T I C E
Do not use pipe clamps to attach the instrument because instrument damage can occur.
For unattended monitoring, attach the instrument to a buoy, anchor or structure.
Install in a location:
• Where instrument damage will not occur such as from floating material, sand, gravel, silt,
navigation or vandalism
• Where the instrument will not come in contact with mud such as after the water recedes
• Where ice will not form around the instrument or sensors
To attach the instrument to a:
• Buoy—use a marking buoy that will not attract vandalism.
• Structure—attach the instrument to the downstream side of a piling to prevent damage from
floating material. Refer to Figure 11. Carefully install straps such as web belts and large plastic
Tie-wraps on both ends of the instrument housing. Attach the deployment cable in the same way
(if used) to prevent cable damage from floating material, navigation and vandalism. To prevent
vandalism, install the instrument and cable so they are not easily seen.
Figure 11 Attach the instrument to a structure
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Maintenance
CAUTION
Multiple hazards. Only qualified personnel must conduct the tasks described in this section of the
document.
CAUTION
Personal injury hazard. Because of pressure buildup inside of the instrument, removable parts can
disengage with force when removed. Loosen and remove the parts slowly. Point the parts away from
people and wear the appropriate protective equipment during maintenance or service activities.
N O T I C E
Do not disassemble the instrument for maintenance without authorization from the manufacturer. If the internal
components must be cleaned or repaired, contact the manufacturer.
N O T I C E
Keep the instrument in a location where the sensors will not freeze or sensor damage will occur.
Clean the housing and the sensor guard
N O T I C E
To prevent damage to some sensors and the instrument, do not use solvents that dissolve plastic to clean the
housing and sensor guard.
At regular intervals, examine the instrument housing and sensor guard. Clean the housing and
sensor guard as necessary to remove unwanted material and deposits.
1. Remove the sensor guard from the instrument.
2. Pour a minimum of 2.5 cm (1 in.) of pH 4 buffer or clean tap water into the storage/calibration
cup.
3. Install the storage/calibration cup on the instrument.
4. Clean the housing and sensor guard with:
• Mild detergent
• Non-toxic, degreasing solution, such as Simple Green® (A registered trademark of Sunshine
Makers, Inc.)
• Warm water
• Clean, soft toothbrush
• Soft cloth and/or cotton swabs
If necessary, soak the sensor guard and/or housing in water for at least 30 minutes to make the
contaminants soft and easier to remove.
5. Rinse the housing and sensor guard with clean water.
Clean the sensors
At regular intervals, examine the sensors for unwanted material, deposits (inorganic and biological)
and damage. Clean the sensors if unwanted material is found. In addition, clean the sensors if
sensor performance has degraded. Refer to the sensor documentation for cleaning instructions.
Replace any damaged parts. Replace any parts with fouling (sedimentary and/or biological) that
affects performance and cannot be removed. Refer to the sensor documentation for maintenance
instructions.
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Replace the battery(s)
WARNING
Explosion hazard. An expired battery can cause hydrogen gas buildup inside the instrument. Replace
the battery before it expires. Do not store the instrument for long periods with a battery installed.
Dispose of batteries in accordance with local, regional and national regulations.
For HL4 sondes with an internal battery pack, replace the D-cell alkaline battery when the battery
power level is low. Refer to Figure 5 on page 8.
For HL7 sondes, replace the four D-cell alkaline batteries when the battery power level is low. Refer
to Install the batteries—HL7 sonde on page 9. Make sure that the battery indicator light flashes green
when the last battery is installed. Refer to Figure 12. If the indicator light flashes red, the batteries do
not have sufficient power.
Note: The battery power level is shown at the top of the Hydrolab Operating Software window.
Make sure that the sonde is horizontal when the battery compartment is opened to keep the water on
the cover out of the battery compartment. If water gets into the battery compartment, remove the
battery, pour the water out and fully dry the compartment with a towel. Let the battery compartment
air dry fully before use to prevent corrosion.
Note: The internal clock battery is not user-replaceable without authorization from the manufacturer.
Figure 12 Battery indicator light
Examine the O-rings and sealing gasket
1. At regular intervals, examine the O-rings and sealing gasket in the mooring cap for unwanted
material, wear or damage. Refer to Figure 13 to Figure 15.
2. Remove any unwanted material from the O-rings and mooring cap.
3. Replace any O-rings with visible damage or wear (e.g., cracks or missing pieces). Replace with
the O-rings from the manufacturer.
4. Apply silicone grease to the O-rings to prevent them from sticking and being pulled out of
position.
5. Replace the mooring cap when damage or wear is visible on the sealing gasket.
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