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1.2 Precautions
This product has been designed with your safety in mind, but please
pay attention to the following warnings and cautions before use.
Warnings
This unit must NOT be connected to CAT II, CAT III or CAT IV
circuits.
Before use check the unit for cracks or any other damage. Make
sure the unit is free from dust, grease and moisture. Also check
any associated leads and accessories for damage. Do not use if
damaged.
Do not use if the battery cover is not fitted.
To avoid electrical shock, and damage to the instrument, do not use
this instrument and the associated temperature probe when voltages
at the measurement surface exceed 24V DC or AC rms.
Cautions
To avoid burns or damage to equipment, do not take temperature
measurements inside microwave ovens.
Repeated sharp flexing can break the thermocouple leads. To
prolong lead life, avoid sharp bends in the leads especially near the
connector.
Avoid severe mechanical shock or vibration and extreme
temperature.
To avoid possible corrosion from leaking batteries, remove the
batteries if discharged, or when the unit is not in use for an
extended period.
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2. INTRODUCTION
2.1 Inspection
Examine the shipping carton for any sign of damage. Inspect the
unit and any accessories for damage. If there is any damage then
consult your distributor immediately.
2.2 Description
The DT173 and DT175 are portable, 3½ digit, compact
thermometers for use with Type K thermocouples.
The DT175 is dual input and may be used in differential mode when
thermocouples are connected to both inputs.
The DT173 and DT175 have the following functions and features:
Temperature range -50°C to 1372°C (-58°F to 1999°F)
Thermocouple compensation adjustment
Max/Min function
Relative function
Data hold function
Backlight
Auto power off
Rubberised outer jacket
2.3 Accessories
The DT173 and DT175 come with the following accessories:
Type K bead thermocouple (x2 for DT175)
4 x 1.5V AAA alkaline batteries
Instructions
2.4 Battery Installation
Refer to Section 4.1 (Battery Replacement) for the battery
installation instructions.
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3. OPERATION
3.1 General
If the thermometer displays OL then the measurement limits of the
range have been exceeded.
The maximum temperature measurement of the DT173/
DT175 is 1372°C (1999°F), but the thermocouple probe being
used may only be specified to 260°C (500°F). Be sure that the
thermocouple probe is adequate for the measurement being
made.
3.2 Low Battery Indication
If the
symbol is displayed the battery needs replacing (See
section 4.1 Battery Replacement).
DT173 DT175
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3.3 Description of Press Buttons
Power on/off button
°C/°F
Selects the temperature scale
Turns on/off the backlight
ADJ
Selects the thermocouple compensation adjustment function
V
REL
Increments thermocouple compensation adjustment value
Selects /deselects the relative mode
W
HOLD
Decrements thermocouple compensation adjustment value
Selects/deselects the data hold function
APO
Selects/deselects auto power off function (DT173 only)
T1 T2
T1-T2
Selects individual thermocouple inputs or the differential mode
(DT175 only)
MAX/MIN
Selects the record function
ENTER
Saves the thermocouple compensation adjustment value (DT173
only)
>2S APO
ENTER
Hold for >2s to selects/deselect auto power off function (DT175 only)
Saves the thermocouple compensation adjustment value
3.4 Description of LCD Symbols
RECORD
Record function is active
MAX
Maximum recorded reading is displayed
MIN
Minimum recorded reading is displayed
MAX-MIN
Maximum – minimum recorded reading is displayed
AVG
Average recorded reading is displayed
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