Instruction Manual
HI8427 - HI931001
pH/mV Simulators
HI 8427
pH/mV CALIBRATOR
LOW BATTERY
LEAKAGE
pH2
pH4
pH7
pH0
pH10
OFF
1900
mV
-350
350
mV
20
30
mV
HIGH
IMPEDANCE
10
0
50
40
°C
1900
mV
pH12
pH14
These Instruments are in Compliance with the CE Directives
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 more precise idea of
its versatility in a wide range of applications.
These instruments are in compliance with the
directives EN 50081-1 and EN 50082-1.
TABLE OF CONTENTS
Preliminary Examination ........................... 3
PRELIMINARY EXAMINATION
Remove the instrument from the packing
material and examine it carefully to make
sure that no damage has occurred during
shipment. If noticeable damage is found,
immediately notify your Dealer.
Each pH/mV simulator is supplied complete
with:
• HI 7858/1 BNC/BNC Coaxial Cable;
Note: Save all packing material until the in-
strument has been observed to function correctly because all defective
items must be returned to the Dealer
in their original packing.
General Description .................................. 3
Functional Description HI 8427 ................. 4
Functional Description HI 931001 ............. 5
pH Calibration ...........................................6
mV (ORP) Calibration ............................... 8
High Impedance Calibration.................... 10
pH Values at Various Temperature.......... 11
Battery Replacement ............................... 12
Accessories ............................................. 13
Warranty.................................................. 14
CE Declaration of Conformity ................. 15
ISO 9000 Certified
Company since 1992
GENERAL DESCRIPTION
HI 8427 and HI 931001 are portable pH/mV
simulators designed specifically for calibrating pH and mV (ORP) meters. Two calibration ranges are provided:
from 0 to 14 pH and from -1900 to 1900 mV
with HI 8427;
from 0 to 14 pH and from -1000 to 1000 mV
with HI 931001.
HI 931001 provides with pH/mV values at
25°C.
HI 8427 allows the manual temperature compensation and is equipped with a HIGH IMPEDANCE key and LEAKAGE LED to verify
if the connection cable is in perfect condition.
A low battery indicator will be lit when the
simulator battery runs low.
32
FUNCTIONAL DESCRIPTION HI 8427
9
HI 8427
pH/mV CALIBRATOR
FUNCTIONAL DESCRIPTION HI 931001
7
8
3
1
2
5
LOW BATTERY
LEAKAGE
pH2 pH4 pH7 pH10
pH0
OFF
1900
mV
0
50
350
-350
mV
mV
10
20
30
HIGH
40
IMPEDANCE
°C
1900
3
pH12
pH14
mV
4
6
1. Rotary Knob
2. Switch Off Selection
3. pH Outputs Selection
4. mV Outputs Selection
5. Temperature Compensation Knob
6. High Impedance Key
7. Low Battery LED
8. Leakage LED
9. BNC Socket
Range pH 0, 2, 4, 7, 10, 12, 14
Accuracy pH ±0.1
(@20°C/68°F) mV ±5
Temperature Manual from 0 to 50°C
Compensation (32 to 122°F)
High Impedance Test 109 Ω
Battery Type 9V
Life 100 hours of continuous use
Environment 0 to 50°C (32 to 122°F); 95% RH
Dimensions 180x83x40 mm (7.1 x 3.3 x 1.6")
Weight 255 g (9 oz.)
mV -1900, -350, 350, 1900
1. LCD Display
2. ON/OFF Key
3. Range Selection Key
4. pH/mV Coarse Setting Knob
5. pH/mV Fine Setting Knob
6. BNC Socket
Range pH 0.00 to 14.00
mV -1000 to 1000
Resolution pH 0.01
mV 1
Accuracy pH ±0.01
(@20°C/68°F) mV ±1
EMC Typical pH ±0.02
Deviation mV ±2
Temperature All output values simulated
Compensation at 25°C (77°F)
Battery Type 9V
Life 500 hours of continuous use
Environment 0 to 50°C (32 to 122°F); 95% RH
Dimensions 180 x 83 x 40 mm (7.1 x 3.3 x 1.6")
Weight 320 g (11.3 oz.)
54
pH CALIBRATION
HI 8427:
• Connect the simulator to
the pH meter using the
HI 7858/1 cable provided.
• Switch the pH meter on
and select pH 7 on the
simulator. Make sure that
the LOW BATTERY LED
is not lit. If it is lit, change
the battery of the simulator before performing the
calibration.
• Verify that the pH meter
displays the pH 7 message. If not, adjust the pH
meter until the correct
reading pH 7 is displayed
(refer to the pH meter instruction manual).
• Select any other pH value
on the simulator and set
the °C knob to the desired working temperature
(e.g. pH 4 at 30°C).
pH
pH
010
4050
°C
pH/mV CALIBRATOR
pH7
pH/mV CALIBRATOR
HI 8427
HI 8427
20
30
working temperature. If not, adjust the
pH meter to read the correct value.
Note: The °C knob is not effective during
pH 7 calibration, since pH 7 is used
as reference.
HI 931001:
• Connect the simulator to
the pH meter using the
HI 7858/1 cable provided.
• Manually set the temperature compensation of your
HI8424
microcomputer
pHmeter
pH
pH
ON
OFF
HI931001
pH/mV
Calibrator
SETTING
meter to 25°C.
ON
• Switch the simulator on
and select the pH mode
OFF
by pressing the RANGE
key.
RANGE
• Make sure that the two additional decimal points are not displayed. If they are
displayed, change the battery of the simulator before performing the calibration.
• Turn the Coarse and Fine knob to set
any desired pH value and make sure that
the pH meter you are checking reflects
the correct result (e.g. 7.01 pH).
• If your pH meter has a temperature probe
connected to it, set the °C knob to the
measured temperature displayed by your
pH meter.
If your meter is manually compensated
for temperature, adjust the temperature
settings for both the pH meter and the
simulator to the same temperature.
• Verify that the pH meter displays the
correct pH value compensated at the
• If not, adjust the pH meter
until the correct reading
is displayed (refer to the
pH meter instruction
manual).
76
HI8424
microcomputer
pHmeter
pH
pH
ON
OFF
HI931001
pH/mV
Calibrator
SETTING
mV (ORP) CALIBRATION
HI 8427:
• Connect the simulator to
the mV (ORP) meter using the HI 7858/1 cable
provided.
pH
HI 8427
pH/mV CALIBRATOR
• Switch the mV meter on
and select the desired mV
value on the simulator.
Make sure that the LOW
BATTERY LED is not lit.
If it is lit, change the battery of the simulator be-
-350
mV
fore performing the calibration.
• If the meter is not displaying the correct
mV value, adjust the meter until it displays the correct mV (refer to the mV
meter instructions manual).
Note: The °C knob is not effective during
mV calibration.
• Make sure that the the two additional
decimal points are not displayed. If they
are displayed, change the battery of the
simulator before performing the calibration.
• Turn the Coarse or Fine knob to any
desired value and make sure that the mV
meter you are checking reflects the correct result.
• If not, adjust the mV meter
until the correct reading
is displayed (refer to the
mV meter instruction
manual).
mV mV
HI8424
ON
microcomputer
OFF
pHmeter
HI931001
pH/mV
Calibrator
SETTING
Note: Temperature compensation does not
apply here.
HI931001:
• Connect the simulator to
the mV (ORP) meter using the HI 7858/1 cable
provided.
• Switch the simulator on
and select the mV mode
by pressing the RANGE
key.
HI8424
microcomputer
pHmeter
pH
pH
ON
OFF
HI931001
pH/mV
Calibrator
ON
OFF
RANGE
SETTING
98
CABLE HIGH IMPEDANCE TEST
E
HI 8427 only:
• Connect the simulator to
the cable (e.g.HI 7855).
• Press the HIGH IMPEDANCE key and observe
the LEAKAGE LED while
you are turning the simulator rotary knob to any
pH/mV value.
HIGH
IMPEDANCE
pH VALUES AT VARIOUS
TEMPERATURE
Temperature has an effect on pH. The calibration buffer solutions are effected by temperature changes to a lesser degree than
normal solutions (see table below).
This pH simulation will not be affected by
this chemical behavior.
Note: With HI 8427 your pH meter will al-
ways show the pH buffer solution at
the standard temperature of 25ºC.
• If the LED does not light,
the cable and connector
going to the meter are in
perfect condition.
• If the LED is lit, it means
there is a leakage problem with the cable and
connector and you should
check/replace it.
LEAKAG
LEAKAGE
TEMP pH VALUES
°C °F 4.01 6.86 7.01 9.18 10.01
0
32
10
15
20
25
30
35
40
45
50
55
60
65
70
4.01
5
41
4.00
50
4.00
59
4.00
68
4.00
77
4.01
86
4.02
95
4.03
104
4.04
113
4.05
122
4.06
131
4.07
140
4.09
149
4.11
158
4.12
6.98
6.95
6.92
6.90
6.88
6.86
6.85
6.84
6.84
6.83
6.83
6.84
6.84
6.85
6.85
7.13
7.10
7.07
7.04
7.03
7.01
7.00
6.99
6.98
6.98
6.98
6.98
6.98
6.99
6.99
9.46
9.39
9.33
9.27
9.22
9.18
9.14
9.10
9.07
9.04
9.01
8.99
8.97
8.95
8.93
10.32
10.24
10.18
10.12
10.06
10.01
9.96
9.92
9.88
9.85
9.82
9.79
9.77
9.76
9.75
1110
BATTERY REPLACEMENT
The instruments use a 9 volt battery that lasts
for approximately 100 hours or 500 hours of
continuous use with HI 8427 and HI 931001
respectively.
In the event of dead battery
the LOW BATTERY LED of
LOW BATTERY
LEAKAGE
HI 8427 will be lit or two additional decimal points will be
pH
displayed on HI 931001.
ACCESSORIES
HI 710001 Soft carrying case for HI 931001,
dimensions 230 x 100 x 50 mm
HI 7858/1 Extension cable with 3 mm di-
ameter (0.12"), 1m (3.3') long
HI 7858/3 Extension cable with 3 mm di-
ameter (0.12"), 3m (9.9') long
HI 7858/5 Extension cable with 3 mm di-
ameter (0.12"), 5m (16.5') long
HI 7858/10 Extension cable with 3 mm di-
ameter (0.12"), 10m (33') long
Battery replacement must only take place in a
non hazardous area using the battery types
specified in this instruction manual (see
page 11).
To change battery, slide the bottom back
cover, replace the old battery and replace the
cover.
BATTERY
HI 7858/15 Extension cable with 3 mm di-
ameter (0.12"), 15m (49.5') long
HI 7858 SERIES CABLE CONNECTORS
BNC AND 3.0 mm (0.12") CABLE WITH BNC
CONNECT TO THE
BNC SOCKET
OF THE SIMULATOR
CONNECT TO THE
BNC SOCKET
OF THE METER
HI 710031 Hard carrying case, dimensions
340 x 230 x 90 mm
1312
WARRANTY
All Hanna Instruments meters are warranted
for two years against defects in workmanship
and materials when used for their intended
purpose and maintained according to instructions. The electrodes and the probes are
warranted for a period of six months. This
warranty is limited to repair or replacement
free of charge.
Damages due to accidents, misuse, tampering or lack of prescribed maintenance are not
covered.
If service is required, contact the dealer from
whom you purchased the instrument. If under
warranty, report the model number, date of
purchase, serial number and the nature of the
failure. 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 Customer Service department and then send it
with shipping costs prepaid. When shipping
any instrument, make sure it is properly packaged for complete protection.
CE DECLARATION OF CONFORMITYCE DECLARATION OF CONFORMITY
CE DECLARATION OF CONFORMITY
CE DECLARATION OF CONFORMITYCE DECLARATION OF CONFORMITY
To validate your warranty, fill out and return the
enclosed warranty card within 14 days from
the date of purchase.
Hanna Instruments reserves the right to modify
the design, construction and appearance of its
products without advance notice.
Recommendations for Users
Before using these products, make sure that they are entirely suitable for the environment
in which they are used.
Operation of these instruments in residential area could cause unacceptable interferences to radio and TV equipments, requiring the operator to take all necessary steps to
correct interferences.
Any variation introduced by the user to the supplied equipment may degrade the
instruments' EMC performance.
In HI 8427, with an applied field of 3V/m, no leakage is signaled by the LEAKAGE led.
To avoid damages or burns, do not perform any measurement in microwave ovens.
1514
www.hannainst.com
16
MANSIMULR2 11/97 PRINTED IN ITALY
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