Hanna Instruments HI 8614 Manuale utente
1
pH and ORP
Transmitters
HI8614 • HI8614L
HI8615 • HI8615L
Instruction Manual
www.hannainst.com
2
PRELIMINARY EXAMINATION ....................................................................3
GENERAL DESCRIPTION............................................................................3
SPECIFICATIONS OF HI8614 & HI8614L .................................................5
SPECIFICATIONS OF HI8615 & HI8615L .................................................6
TERMINAL BOARD CONNECTIONS .............................................................7
pH CALIBRATION WITH AUTOMATIC TEMPERATURE COMPENSATION
(HI8614 FAMILY)....................................................................................9
pH CALIBRATION WITH FIXED TEMPERATURE COMPENSATION
(HI8614 FAMILY)..................................................................................12
ORP CALIBRATION (H8615 FAMILY) .......................................................13
ELECTRODE CONDITIONING & MAINTENANCE...........................................17
TEMPERATURE CORRELATION FOR pH SENSITIVE GLASS.......................... 20
INSTALLATION PROCEDURE AND EXAMPLES............................................22
ACCESSORIES........................................................................................25
TABLE OF CONTENTS
HI8614, HI8614L, HI8615 and HI8615L are guaranteed for two
years against defects in workmanship and materials when used for their
intended purpose and maintained according to instructions. Electrodes
and probes are guaranteed for six months. This warranty is limited to
repair or replacement free of charge.
Damage due to accidents, misuse, tampering or lack of prescribed
maintenance is not covered.
If service is required, contact your local Hanna Instruments Office. If
under warranty, report the model number, date of purchase, serial
number and the nature of the problem. If the repair is not covered by the
warranty, you will be notified of the charges incurred. If the instrument
is to be returned to Hanna Instruments, first obtain a Returned Goods
Authorization number from the Technical Service department and then
send it with shipping costs prepaid. When shipping any instrument,
make sure it is properly packed for complete protection.
WARRANTY
Dear Customer,
Thank you for choosing a Hanna Instruments product.
Please read this instruction manual carefully before using these
instruments.
This manual will provide you with the necessary information for correct
use of these instruments, as well as a precise idea of their versatility.
If you need additional technical information, do not hesitate to e‑mail
www.hannainst.com.
3
PRELIMINARY EXAMINATION
Remove the instrument from the packing material and examine it
carefully to make sure that no damage has occurred during shipping.
If there is any noticeable damage, please contact your local Hanna
Instruments Office.
Note:Save all packing material until you are sure that the instrument
functions correctly. All defective items must be returned in the
original packing material together with the supplied acces‑
sories.
GENERAL DESCRIPTION
HI8614 /HI8614L (pH) and HI8615 /HI8615L (ORP) are 2‑wire
water‑resistant transmitters specially designed for long distance
measurement of pH or ORP in industrial applications.
HI8614 and HI8615 are models without LCD, and the HI8614L and
HI8615L are models with LCD.
The LCD allows easy verification and monitoring of measured values,
and provides easier calibration and maintainance.
The pH or ORP signal is transmitted in a 2‑wire current loop in the
range of 4 to 20 mA.
HI8614 and HI8614L, can be connected to the Hanna Instruments
process instruments HI8510, HI8710, HI8711 or to any recorder,
computer or data monitor that accepts 4 to 20 mA input.
HI8615 and HI8615L, can be connected to the Hanna Instruments
process instruments HI8512, HI8720 or to any recorder, computer or
data monitor that accepts 4 to 20 mA input.
4
The transmitters use a universal BNC socket for quick and secure con‑
nection to any electrode with a BNC connector.
For HI8614 family models the temperature compensation is performed
by the transmitter’s ATC circuitry if the temperature probe (HI76608,
optional) is attached. If ATC is not required, it is possible to substitute
the temperature probe with a fixed resistor.
The input is isolated from the current loop to eliminate problems
related to ground loop, low insulation cables, multiple electrode con‑
nections, and a common mode voltage of up to 100 V ensures true
differential readings.
The terminal board of the transmitter provides for connection of power
supply, pH or ORP electrodes and temperature probe (for HI8614
family models only).
The unit is enclosed in a protective casing conforming to IP65 standards.
Ordering codes:
Code Range LCD
HI8614 0.00 to 14.00 pH NO
HI8614L 0.00 to 14.00 pH YES
HI8615 ±1000 mV NO
HI8615L ±1000 mV YES
5
SPECIFICATIONS OF HI8614 & HI8614L
Range 4 to 20 mA/ 0.00 to 14.00 pH
Resolution 0.01 mA/ 0.01 pH
Accuracy
(@25 °C/77 °F) ±0.02 mA/ ±0.02 pH
Calibration Offset: ±2.2 mA/ ±2 pH
Slope: ±0.5 mA/ 86 to 116 %
Temperature
Compensation
Fixed or automatic from 0 to 100 °C
(32 to 212 °F) with HI76608 probe
Input Impedance 1012 Ohm
Output 4‑20 mA (isolated)
Installation Category II
Protection IP65
Environment 0 to 50 °C (32 to 122 °F)
RH max 95% non‑condensing
Power Supply HI8614: 18 to 30 Vdc
HI8614L: 20 to 36 Vdc
Load Max 500 Ohm
Dimensions 165 x 110 x 71 mm (6.5 x 4.3 x 2.8)
Weight 1 kg (2.2 lb.)
6
SPECIFICATIONS OF HI8615 & HI8615L
Range 4 to 20 mA/ ±1000 mV
Resolution 0.01 mA/ 1 mV
Accuracy
(@25 °C/77 °F) ±0.02 mA/ ±5 mV
Calibration Offset: ±0.8 mA/ ±100 mV
Slope: ±0.8 mA/ 90 to 110 %
Input Impedance 1012 Ohm
Output 4‑20 mA (isolated)
Installation Category II
Protection IP65
Environment 0 to 50 °C (32 to 122 °F)
RH max 95% non‑condensing
Power Supply HI8615: 18 to 30 Vdc
HI8615L: 20 to 36 Vdc
Load Max 500 Ohm
Dimensions 165 x 110 x 71 mm (6.5 x 4.3 x 2.8)
Weight 1 kg (2.2 lb.)
7
TERMINAL BOARD CONNECTIONS
Unscrew the 4 screws and remove the top cover.
There are three cable glands on the transmitter cover. The large cable
gland with the split in the rubber is for the electrode.
Connect the positive supply to the strip terminal “+VE LOOP“ and
the negative supply to the terminal “‑VE LOOP“ of the transmitter
terminal block.
Black and Red contacts (HI8614L and HI8615L only).
‑ Red ‑ LCD board V+(factory connected to the LCD)
‑ Black ‑ LCD board V‑(factory connected to the LCD)
8
The wire between the transmitter and the recorder/indicator/controller
should be a PVC insulated two wire with a wire diameter of at least
0.7 mm. This wire is fed through one of the smaller cable glands. The
maximum distance between the power supply and the amplifier is 300
m (1000’). It is not necessary to use shielded cable. The transmitter is
protected against inversion of supply voltage.
Electrode connection: connect the
BNC of the cable to the BNC socket on
the transmitter.
ForHI8614familyonly:forautomatic
temperature compensation, connect
the2terminalsofthetemperatureprobe
(HI76608, optional) to “TEMP. PROBE“
terminals.
If automatic temperature compensa‑
tion is not required, short the “TEMP.
PROBE“terminals with a resistance
according to the external temperature:
Temperature (°C) Resistance (Ohms)
0 1634
10 1774
20 1922
30 2078
40 2242
50 2412
60 2590
A2kohmresistorisfactorymountedfor25 °Ctemperaturecompensation.
9
pH CALIBRATION WITH AUTOMATIC
TEMPERATURE COMPENSATION (HI8614 family)
INITIAL PREPARATION
• Connect the pH electrode to the
BNC socket.
• Connect the temperature probe to
the transmitter.
Pour small quantities of pH7.01 and
pH4.01 solution into two clean beakers.
For accurate calibration use two beakers for each buffer solution, the
first one for rinsing the electrode, the second one for calibration. In
this way contamination of the buffers is minimized.
To get accurate readings, use pH7.01 and pH4.01 if you are go‑
ing to measure acid samples or pH7.01 and pH10.01 for alkaline
measurements.
Note:With HI8614L the instruments display can be used during
calibration without the need to connect the ammeter and the
reading is directly expressed in pH units.
10
PROCEDURE
• Disconnect the +ve supply cable from “+VE LOOP“ terminal and
connect a 20 mA f.s. ammeter between the +ve cable and “+VE
LOOP“ terminal.
• Remove the protective cap from the electrode,
rinse it with some pH7.01 solution or immerse it
in the pH7 rinse solution, then immerse the pH
electrode and temperature probe into pH7.01
calibration buffer solution; shake briefly and wait
for the reading to stabilize.
Note:The tip of the electrode should be
submerged approximately 4 cm (1½”)
into the solution. The temperature probe
should be located as close to the pH
electrode as possible.
• Adjust the offset trimmer until the ammeter reads 12 mA or
the display shows “7.01“ if the temperature of the buffer is at
25 °C.
For other buffer temperatures, refer
to page 12 for the appropriate
mA / pH reading.
• Rinse the electrode with tap water or distilled
water and a small amount of pH4.01 or 10.01
buffer solution or immerse it in the pH4 rinse
solution (2nd calibration point). Dip the elec‑
trode and the temperature probe into pH4.01
(or 10.01) calibration buffer solution, shake
briefly and wait for a few minutes for reading
to stabilize.
Altri manuali per HI 8614
2
Questo manuale è adatto per i seguenti modelli
3
Indice
Altri manuali Hanna Instruments Trasmettitore
Hanna Instruments
Hanna Instruments HI 8666 Manuale utente
Hanna Instruments
Hanna Instruments HI 8614 Manuale utente
Hanna Instruments
Hanna Instruments HI 8666 Manuale utente
Hanna Instruments
Hanna Instruments HI 504910 Manuale utente
Hanna Instruments
Hanna Instruments HI 8614 Manuale utente
Hanna Instruments
Hanna Instruments HI 9200/9 Manuale utente
