Hanna Instruments HI 8614L User Manual
Instruction Manual
HI 8614 - HI 8614L
HI8615 - HI8615L
pH and ORP
Transmitters
pH
HI8614L
pH INDICATOR
& TRANSMITTER
These Instruments are in Compliance with the CE Directives
http://www.hannainst.com
1
Dear Customer,
Thank you for choosing a Hanna Instruments
Product.
Please read this instruction manual carefully
before using the instrument.
This manual will provide you with all the neces-
sary information for the correct use of the
instrument, as well as a precise idea of its
versatility in a wide range of applications.
These instruments are in compliance with the
directives.
TABLE OF CONTENTS
Preliminary Examination............................ 3
General Description ................................... 3
Specifications of HI8614 & HI 8614L ........ 5
Specifications of HI 8615 & HI8615L ........ 6
Terminal Board Connections ..................... 7
pH Calibration with Automatic Temperature
Compensation (HI8614 & HI8614L) .......... 9
pH Calibration with Manual Temperature
Compensation (HI8614 & HI8614L)....... 13
ORP Calibration (HI8615 & HI8615L) .... 14
Electrode Conditioning and Maintenance . . 19
Temperature-Resistance Correlation for
HANNA pH Sensitive Glass .................... 23
Installation Procedure and Examples ...... 25
Accessories .............................................. 28
Warranty .................................................. 34
CE Declaration of Conformity ................. 35
2
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,
notify your Dealer.
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 accessories.
GENERAL DESCRIPTION
HI 8614 - HI 8614L (pH) and HI 8615 HI 8615L (ORP) are 2-wire water-resistant
transmitters designed specially for long distance measurement of pH or ORP for use in
industrial applications.
Two versions are available: the standard
HI8614 or HI8615 and HI8614L or HI8615L
with an LCD.
The LCD versions allow easy verification
and monitoring of measured values and are
easier to calibrate and maintain.
The pH or ORP signal is transmitted in a 2wire current loop in the range of 4 to 20 mA.
HI8614 and HI8614L can be connected to
Hanna process instruments HI 8510T,
HI8710T or HI 8711T, recorders, computers
or any data monitoring device that accepts
4 to 20 mA input.
HI8615 and HI8615L can be connected to
Hanna meters HI8512T, HI8720T or any
recorders, computers or data monitor that
accepts 4 to 20 mA input.
3
The transmitters use a universal BNC socket
for quick and secure connection to any electrode with a BNC connector.
For HI8614 - HI8614L: temperature compensation is performed by the transmitter's
ATC circuitry when measurements are taken
with the temperature probe attached
(HI76608, optional); it is also possible to
substitute the temperature probe with a fixed
resistor if ATC is not required.
The input is isolated from the current loop
to eliminate problems related to ground loop,
low insulation cables, multiple electrode connections, and a common mode voltage of
up to 100V ensures true differential readings.
A terminal board in the transmitter provides
for connection of power supply, pH or ORP
electrodes (and temperature probe for
HI8614 & HI 8614L).
The unit is enclosed in a protective casing
conforming to IP65 standards.
4
SPECIFICATIONS OF HI 8614 & HI 8614L
RANGE pH
mA
RESOLUTION pH
mA
ACCURACY pH
@20°C/68°F mA
TYPICAL EMC pH
DEVIATION mA
CALIBRATION Offset:
Slope:
TEMPERATURE
COMPENSATION
INPUT IMPEDANCE
OUTPUT
INSTALLATION
CATEGORY
POWER
LOAD
PROTECTION
ENVIRONMENT
TEMP.
RH
DIMENSIONS
WEIGHT
HI8614
----
4 to 20
----
0.01
----
±0.02
----
±0.25
±2.2 mA
±0.5 mA
HI8614L
0.00 to 14.00
4 to 20
0.01
0.01
±0.02
±0.02
±0.2
±0.25
±2.2 mA/±2 pH
±0.5 mA
86 to 116%
Fixed/automatic 0 to 100°C
(32 to 212°F) with HI76608
temp. probe (optional)
1012 ohm
4 to 20 mA isolated
II
without LCD: 18 to 30VDC
with LCD 20 to 36VDC
Max. 500 ohms
IP 65
0 to 50°C (32 to 122°F)
0-95% (non-condensing)
165 x 110 x 90 mm (L x W x H)
(6.5 x 4.3 x 3.5")
1 Kg (2.2 lb.)
HI8614
pH TRANSMITTER
pH
HI8614 L
pH INDICATOR
& TRANSMITTER
5
SPECIFICATIONS OF HI8615 & HI8615L
RANGE mV
mA
RESOLUTION mV
mA
ACCURACY mV
@20°C/68°F mA
TYPICAL EMC mV
DEVIATION mA
CALIBRATION Offset:
Slope:
INPUT IMPEDANCE
OUTPUT
INSTALLATION
CATEGORY
POWER
LOAD
PROTECTION
ENVIRONMENT
TEMP.
RH
DIMENSIONS
WEIGHT
HI8615
----
4 to 20
----
0.01
----
±0.02
----
±0.25
±0.8 mA
±0.8 mA
HI8615L
0 to ±1000
4 to 20
1
0.01
±5
±0.02
±15
±0.25
±0.8 mA/±100mV
±0.8 mA
90 to 110%
1012 ohm
4 to 20 mA isolated
II
without LCD: 18 to 30VDC
with LCD 20 to 36VDC
Max. 500 ohms
IP 65
0 to 50°C (32 to 122°F)
0-95% (non-condensing)
165 x 110 x 90 mm (L x W x H)
(6.5 x 4.3 x 3.5")
1 Kg (2.2 lb.)
HI 8615
ORP TRANSMITTER
mV
HI 8615
ORP TRANSMITTER
6
TERMINAL BOARD CONNECTIONS
Remove the 4 screws and take the top cover
off.
There are three cable glands on the cover of
the transmitter: two smaller ones and a large
one. The large cable gland with the split in the
rubber is for the electrode.
ELECTRODE
CABLE GLAND
WIRE CABLE GLANDS
Connect the positive supply to the strip terminal "+VE LOOP" and the negative supply to
the terminal "-VE LOOP" of the transmitter
terminal block.
7
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.
For HI 8614 & HI 8614L only:
for automatic temperature
compensation, connect the 2
terminals of the temperature
probe (HI76608, optional) to
"TEMP. PROBE" terminals.
If automatic temperature compensation 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
A 2 kohm resistor is factory mounted for 25°C
temperature compensation.
8
pH CALIBRATION WITH AUTOMATIC
SLOPE ADJUSTMENT
OFFSET ADJUSTMENT
TEMPERATURE COMPENSATION
(HI 8614 & HI 8614L)
Initial preparation:
• Connect the pH electrode
to the BNC socket.
• Connect the temperature
probe to the transmitter.
Pour small quantities of pH 7.01 and pH 4.01
solution into two clean beakers.
4
0
0
I 7
H
HI 7004 HI 7007
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
pH 4.01 if you are going to measure acid
samples or pH 7.01 and pH 10.01 for alkaline measurements.
RINSE
HI 7007
Note: with HI8614L the instru-
ments display can be
used during calibration
without the need to connect the ammeter and the
reading is directly expressed in pH units.
9
CALIBRATION
HI 7007
Procedure:
• Disconnect the +ve supply cable from
"+VE LOOP" terminal and connect a
20mA f.s. ammeter between the +ve
cable and "+VE LOOP" terminal.
• Remove the protective cap
from the electrode, rinse it
with some pH 7.01 solution
or immerse it in the pH 7
rinse solution, then immerse the pH electrode and
HI 7007
temperature probe into
pH 7.01 calibration buffer
solution; shake briefly and
wait for the reading to stabilize.
Note: the tip of the elec-
trode should be submerged approximately 4 cm (1½")
into the solution. The
4 cm
1½"
temperature probe
should be located as
close to the pH electrode as possible.
• Adjust the offset trimmer until the am-
meter reads 12mA or the display shows
"7.01" (HI 8614L only) if the temperature
of the buffer is at 25°C.
SLOPE ADJUSTMENT
OFFSET ADJUSTMENT
mA
10
For other buffer temperatures, refer to
page 11 for the appropriate mA / pH
reading.
• Rinse the electrode with
tap water or distilled water
and a small amount of
pH 4.01 or 10.01 buffer solution or immerse it in the
pH4 rinse solution (2nd
calibration point). Dip the
electrode and the tempera-
HI 7004
ture probe into pH 4.01 (or
10.01) calibration buffer solution, shake briefly and
wait for a few minutes for
reading to stabilize.
• Adjust the slope trimmer until the amme-
ter reads 8.58 mA or the display shows
"4.01" at 25°C. For other buffer temperatures, refer to page 11 for the appropriate mA / pH reading (HI 8614L).
SLOPE ADJUSTMENT
OFFSET ADJUSTMENT
mA
If you are using pH 10.01
buffer solution adjust the
slope trimmer until the am-
mA
meter read 15.43mA at
25°C (77°F) or the value
indicated at page 11.
FOR HI8614L ONLY:
The Display Module is factory calibrated, so
that the LCD display results are referred to
the 4-20 mA loop current (e.g. LCD displays
0.00 pH when loop current is 4.00 mA and
displays 14.00 pH when current is 20.00mA).
11
Loading...