Hach pHD Sensor Manual de usuario
DOC023.97.80089
pHD Sensor
07/2016, Edition 3
User Manual
Manuel d'utilisation
Manual del usuario
Manual do Usuário
用户手册
取扱説明書
사용 설명서
English..............................................................................................................................3
Français......................................................................................................................... 20
Español.......................................................................................................................... 38
Português...................................................................................................................... 56
中文................................................................................................................................. 74
日本語............................................................................................................................. 91
한글............................................................................................................................... 109
2
Specifications
Specifications are subject to change without notice.
Specification Details
Measurement range (pH) 2.5 to 12.5 pH
Measurement range (temperature) -5 to 95 °C (23 to 203 °F)
Resolution 0.01 or 0.1 pH
Temperature compensation 300 ohm NTC thermistor
Stability (analyzer only) 0.03 pH per 24 hours, non-cumulative
Sensitivity Less than 0.005 pH
Maximum probe immersion depth/
pressure
6.9 bar at 105 °C (100 psi at 221 °F)
Maximum flow rate 3 m (10 ft) per second
Power requirements 5 VDC, 1 mA (supplied by controller)
Operating temperature -5 to 95 °C (23 to 203 °F)
Cable lengths/type 6 m (20 ft), 5 conductor (plus two isolated shields) cable with XLPE
(cross-linked polyethylene) jacket; rated to 150 °C (302 °F)
Maximum transmission distance 914 m (3000 ft)
Calibration methods Initial 2-point calibration using 2 buffers and then option to use 1-point or
2-point (slope) calibration using samples or buffers
Interfaces Modbus from gateway
Material Ryton® (PVDF) body, salt bridge of matching material with Kynar®
junction, glass process electrode, titanium ground electrode, and Viton®
O-ring seals
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
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.
English 3
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.
This is the safety alert symbol. Obey all safety messages that follow this symbol to avoid potential
injury. If on the instrument, refer to the instruction manual for operation or safety information.
This symbol indicates that a risk of electrical shock and/or electrocution exists.
This symbol indicates the presence of devices sensitive to Electro-static Discharge (ESD) and
indicates that care must be taken to prevent damage with the equipment.
Electrical equipment marked with this symbol may not be disposed of in European public disposal
systems after 12 August of 2005. In conformity with European local and national regulations (EU
Directive 2002/96/EC), European electrical equipment users must now return old or end-of-life
equipment to the Producer for disposal at no charge to the user.
Product overview
This sensor is designed to work with the digital gateway for the CLF10sc and CLT10sc Reagentless
Chlorine Analyzer and one of the sc series controllers for data collection and operation.
This sensor has an internal temperature sensor (thermistor). The temperature measurement signal is
used internally by the sensor for automatic temperature compensation and is shown on the
controller.
Theory of operation
pH is the negative logarithm of the hydrogen ion activity and a measure of the acidity or alkalinity of a
solution.
pH is normally measured with a glass electrode and a reference electrode. The glass electrode acts
as a transducer which converts chemical energy (the hydrogen ion activity) into an electrical energy
(measured in millivolts). The reaction is balanced and the electrical circuit is completed by the flow of
ions from the reference solution to the solution under test.
The electrode and reference solution together develop a voltage (emf) whose magnitude depends on
the type of reference electrode, the internal construction of the glass electrode, the pH of the solution
and the temperature of the solution.
Product components
Refer to Figure 1 to make sure that all components have been received. If any of these items are
missing or damaged, contact the manufacturer or a sales representative immediately.
4 English
Figure 1 Sensor components
1 pHD sensor 2 Sealing hub for pH flow cell
Installation
CAUTION
Personal injury hazard. Only qualified personnel should conduct the tasks described in this section of the manual.
Install the sensor
The pH sensor must be installed in the flow cell, connected to the gateway and calibrated before use.
The sensor does not need to be conditioned. To install the sensor, refer to the illustrated steps.
English 5
1 2
3 4
6 English
Connect the sensor to the gateway
D A N G E R
Electrocution Hazard. High voltage wiring for the controller is conducted behind the high voltage barrier in the
controller enclosure. The barrier must remain in place except when installing modules, or when a qualified
installation technician is wiring for power, relays or analog and network cards.
WARNING
Potential Electrocution Hazard. Always disconnect power to the instrument when making electrical
connections.
N O T I C E
Potential Instrument Damage. Delicate internal electronic components can be damaged by static
electricity, resulting in degraded performance or eventual failure.
Pre-requisites: Make sure the sensor cable is routed through the sealing hub and then the lock ring
for the pH flow cell before doing this procedure. Refer to Install the sensor on page 5 for the
illustrated steps.
To connect the sensor to the gateway, refer to the illustrated steps and Table 1.
Table 1 pHD sensor wire connections
Connector Pin Signal Sensor wire
J4 WHT -5 VDC White
SHLD Solution ground Clear (2 wires)
BLK Temp – Black
YEL Temp + Yellow
GRN (TB1) 1 Reference Green
2 Reference —
RED (TB2) 1 Active/Measuring —
2 Active/Measuring Red
English 7
1
2 3
8 English
4
5 6
English 9
Operation
Guidelines for operation
CAUTION
Personal injury hazard. If the pH process electrode breaks, handle the sensor very carefully to prevent injury.
• Before the pH sensor is placed in operation, remove the protective cap to expose the process
electrode and salt bridge. Save the protective cap for future use.
• The process electrode at the pH sensor tip has a glass bulb, which can break. Do not subject this
electrode to abrupt impact or other mechanical abuse.
• For short-term storage (when the sensor is out of the process for more than one hour), fill the
protective cap with pH 4 buffer or distilled water and put the cap back on the sensor. Keep the
process electrode and salt bridge moist to avoid slow response when the sensor is returned to
operation.
• For extended storage, repeat the short-term storage procedure every 2 to 4 weeks, depending on
the environmental conditions.
User navigation
Refer to the controller documentation for keypad description and navigation information.
Configure the sensor
Use the Configure menu to enter identification information and display options for the sensor and to
change options for data handling and storage.
1. Push the MENU key and select Sensor Setup, Configure.
Option Description
EDIT NAME Changes the name that corresponds to the sensor on the top of the measure screen.
The name is limited to 10 characters in any combination of letters, numbers, spaces or
punctuation. The default name is the serial number of the sensor.
SELECT PARAM. Customizes the options for sensor data handling and storage. Refer to Select
temperature parameters on page 10 and Select pH parameters on page 11.
RESET DEFAULTS Sets the configuration menu to the default settings. All sensor information is lost.
Select temperature parameters
1. Select the type of chlorine sensor used - Total CL2 or Free CL2.
2. Select Yes.
3. Select DIFF PH.
4. Select Temperature.
5. Customize the options:
Option Description
SELECT UNITS Sets the units for the temperature measurements-°C (default) or °F.
FILTER Sets a time constant to increase signal stability. The time constant calculates the average
value during a specified time-0 (no effect, default) to 60 seconds (average of signal value
for 60 seconds). The filter increases the time for the sensor signal to respond to actual
changes in the process.
LOG SETUP Sets the time interval for data storage in the data log-10, 30 seconds, 1, 5, 15 (default),
60 minutes.
10 English
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