TAKING pH MEASUREMENTS
• Turn the meter on by connecting the 12 VDC power
adapter to the meter and the mains.
• Connect a pH electrode to the HACCP Indicator.
• Remove the protective cap from the pH electrode and
immerse the tip (4 cm/1½”) in the sample.
• Allow the reading to stabilize.
ADJUSTING THE SETPOINT
You can select a Setpoint between 4.0 and 7.5 pH. A visual
LED indication alerts you when the sample pH is more than
the desired value.
• Unscrew and remove the rear panel and gasket seal to
access the MEASURE/SET switch and the Setpoint ad-
justment trimmer.
• Move the switch up to visualize the Setpoint.
• With a small screwdriver adjust the Setpoint trimmer to
display the desired value. The Setpoint is factory set at
5.5 pH.
• Move the switch down to return to measurement mode.
• Replace the rear panel and the gasket, ensuring the
unit is properly closed.
• Whenever the pH reading ex-
ceeds Setpoint, the alarm LED
blinks to warn the user.
For better accuracy, frequent calibration of the instrument is
recommended. In addition, the instrument must be recali-
brated whenever:
a) The pH electrode is replaced.
b) After testing aggressive samples.
c) Where higher accuracy is required.
d) At least once a month.
e) When the electrode has been used for a long time.
PREPARATION
Pour small quantities of pH 7.0 (HI 7007
HI 7007
HI 7007
HI 7007
HI 7007) and pH 4.0
(HI 7004
HI 7004
HI 7004
HI 7004
HI 7004) solution into two clean beakers.
For accurate calibration use two beakers for each buffer
solution, the first one for rinsing the tip of the electrode and
the second one for calibration. This way, contamination of
the buffers is minimized.
A range of HANNA buffer solutions in single-use sachets is
also available for a more hygienic calibration.
CALIBRATION PROCEDURE
• Turn the meter on and make sure that the MEASURE/SET
switch is on the MEASURE mode.
• Remove the protective cap from
the electrode, rinse and im-
merse it in a pH 7.0 buffer.
Stir gently and then wait a
couple of minutes for the read-
ing to stabilize.
Note:
The electrode should be sub-
merged approximately 4 cm
(1½”) in the solution.
CALIBRATION
CALIBRATION
CALIBRATION
CALIBRATION
CALIBRATION
HI 7004
HI 7007
HI 7004
HI 7007
HI 7004
HI 7007
RINSE
HI 7007
CALIBRATION
• Adjust the right hand trimmer with the calibration
screwdriver until the LCD shows pH 7.0.
•
Rinse and immerse the pH electrode in
pH 4.0 solution (second buffer) and stir
gently.
• Wait a couple of minutes and then adjust the left hand
trimmer until the LCD shows the value of the second
buffer (4.0 in this case).
The pH calibration is now complete.
4 cm
(1½")
7.0
FOOD STABILITY
p H
I N D I C ATO R
HACCP
pH
pH4
pH7
Recommendations for Users
Before using this product, make sure that it is entirely
suitable for the environment in which it is used. Operation
of this instrument in residential areas could cause unaccept-
able interference to radio and TV equipment.
The glass bulb at the end of the electrode is sensitive to
electrostatic discharge. Avoid touching this glass bulb at all
times. During operation, ESD wrist straps should be worn to
avoid possible damage to the electrode by electrostatic dis-
charge.
Any variation introduced by the user to the supplied equip-
ment may degrade the instrument’s EMC performance.
To avoid electrical shock, do not use this instrument when
voltage at the measurement surface exceeds 24 VAC or 60 VDC.
To avoid damage or burns, do not perform any measurement
in microwave ovens.
A C C E S S O R I E S
A C C E S S O R I E S
A C C E S S O R I E S
A C C E S S O R I E S
A C C E S S O R I E S
FC 200B
Conic open junction pH electrode
FC 230B
pH electrode with optional blade
FC 098
Stainless steel blade, 20mm (0.8”)
FC 099
Stainless steel blade, 35mm (1.4”)
HI 70004P pH 4.01 solution, 20 mL sachet (25 pcs)
HI 70007P pH 7.01 solution, 20 mL sachet (25 pcs)
HI 710005 12 VDC power adapter, US plug
HI 710006 12 VDC power adapter, European plug
HI 710012 12 VDC power adapter, Australian plug
HI 710013 12 VDC power adapter, Southern Africa plug
HI 710014 12 VDC power adapter, UK plug
HI 77400P pH 4 & 7 solutions, 20 mL sachet (5 each)
HI 7004M
pH 4.01 solution, 230 mL
HI 7007M
pH 7.01 solution 230 mL
HI 70300M Storage solution, 230 mL
HI 7061M
Cleaning solution, 230 mL
ISTRHI981400 04/2000
PRINTED IN PORTUGAL
SET
MEAS
5.8
FOOD STABILITY
p H
I N D I C ATO R
HACCP
pH
pH4
pH7
SET
MEAS
