Hanna Instruments HI 148-00 User Manual

Instruction Manual

HI 148 Series

Thermometers

These Instruments are in

Compliance with the CE Directives

PRELIMINARY EXAMINATION

Remove the instrument from the packing material and exam­ine it carefully. If any damage has occurred during shipment,
immediately notify your Dealer or the nearest Hanna Customer
Service Center.

The meters are supplied with 12 VDC power adapter.
Note: Conserve all packing material until the instrument has

been observed to function correctly because any defective
item must be returned to the Dealer in its original
packing.

Dear Customer,
Thank you for choosing a Hanna product. This manual will

provide you with the necessary information for correct opera­tion. Please read it carefully before using the meter. If you
need additional technical information, do not hesitate to e­mail us at [e-mail].

These instruments are in compliance with the CE directives.

GENERAL DESCRIPTION

HI 148 is an indicator for the monitoring of food temperature
in different production cycles.
Constructed in a compact casing and with a molded eye, HI
148 can be installed on the QC bench or wherever necessary to
control the ambient temperature of food chain, from the
storage room to the point of delivery.
The housing has been completely sealed against vapors and
humidity.
The measurement range is from -20 to 60ºC (-4 to 140ºF) with
an excellent ±0.5ºC (±0.9ºF) accuracy. The stainless steel
encapsulated sensor is positioned right on the outer body of this
thermometer to provide a rapid response.
In order to ensure that temperature control is never inter­rupted, HI 148 runs permanently on a 12VDC power supply.
Temperature is constantly displayed on a large LCD so that the
operator can check it at any time.
HI 148 also offers a unique alarm control. Any value from 0 to

50.0ºC or 32 to 122ºF can be adjusted as the setpoint through
a trimmer located on the back of the meter. Should the
temperature exceed this user-selectable setpoint, the red LED
blinks to warn of an abnormality. The built-in LED is well visible
from a distance.
This alarm is a cost-saving feature with a tremendous poten­tial. It can be used as a forewarning that the refrigeration or
air conditioning unit is malfunctioning, or that a door has
been left open, or point to any other mishaps, common in a
busy workplace.
HI 148 is a convenient and very inexpensive way to ensure
that temperature of the environment in which food is pre­pared, kept and served never varies too much from the limits
imposed by the HACCP regulations. In fact , the meter frees
workers from having to manually check the temperature and
immediately signals if and when an abnormality arises.

Celsius and Fahrenheit models are available.

SPECIFICATIONS

HI 148-00

Range -20.0 to 60.0ºC
Resolution 0.1ºC
Accuracy ±0.5ºC
Setpoint Selectable from 0.0 to 50.0ºC
Hysteresis ±0.5ºC around setpoint
Alarm LED blinks when measured temperature is

higher than the setpoint

Sensor Incorporated, encapsulated stainless steel
Environment -20 to 60ºC; RH 100%
Power supply External 12 VDC (included)
Dimensions 86 x 94 x 33 mm (3.3 x 3.7 x 1.3”)
Weight 150 g (5.2 oz.)

HI 148-01

Range -4.0 to 140.0ºF
Resolution 0.1ºF
Accuracy ±0.9ºF
Setpoint Selectable from 32.0 to 122.0ºF
Hysteresis ±1ºF around setpoint
Alarm LED blinks when measured temperature is

higher than the setpoint

Sensor Incorporated, encapsulated stainless steel
Environment -4 to 140ºF; RH 100%
Power supply External 12 VDC (included)
Dimensions 86 x 94 x 33 mm (3.3 x 3.7 x 1.3”)
Weight 150 g (5.2 oz.)

FUNCTIONAL DESCRIPTION

1. Molded eye

2. Alarm LED

3. Liquid Cristal Display

4. Sensor

5. Power supply connector

6. 12VDC power adapter (included)

OPERATIONAL GUIDE

TAKING MEASUREMENTS

• Turn the meter on by connecting the 12 VDC power
adapter to the meter and to the mains.

• A value will appear on the LCD, to indicate the tem­perature. Wait a few minutes for the display to stabilize.

ADJUSTING THE SETPOINT

With HI 148 you can select your own setpoint and be alerted
with a visual LED alarm when an abnormal situation arises.

• Unscrew and remove the rear panel and gasket seal to ac­cess the MEASURE/SET switch.

• Move the switch to the left (SET Mode).

• Replace the rear panel and the gasket, ensuring the
unit is properly closed.

WARRANTY

• With a small screwdriver adjust the setpoint trimmer to
display the desired value in the 0 to 50 ºC or in the 32
to 122ºF range for the Celsius or Fahrenheit models,
respectively.

• Whenever the temperature reading reaches the setpoint
value (considering the hysteresis) the alarm LED starts
blinking.

HI 148-00/01 Thermometer are warranted for one year
against defects in workmanship and materials when used
for their intended purpose and maintained according to
instructions. The sensor are warranted for a period of one
year also. This warranty is limited to repair or replacement
free of charge.

Damages due to accident, 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 ship­ment costs prepaid. When shipping any instrument, make
sure it is properly packaged for complete protection.

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 areas could
cause unacceptable interference to radio and TV equipment.

The metal band at the end of the probe is sensitive to electro­static discharges. Avoid touching this metal band at all times.

During operation, ESD wrist straps should be worn to avoid
possible damage to the probe by electrostatic discharges.

Any variation introduced by the user to the supplied equip­ment may degrade the instrument’s EMC performance.

To avoid electrical shock, do not use these instruments when
voltage at the measurement surface exceed 24 VAC or 60 VDC.

To avoid damage or burns, do not perform any measurement
in microwave ovens.

• Make sure the switch is moved back to the right
(MEASURE Mode).

All rights are reserved. Reproduction in whole or in part is
prohibited without the written consent of the copyright
owner, Hanna Instruments Inc., Woonsocket, Rhode Is­land, 02895 , USA.

Hanna Instruments reserves the right to modify the design, construction
and appearance of its products without advance notice.

ISTRHI148R1 02/2000

www.hannainst.com