This versatile hand-held instrument provides highly
accurate temperature measurements. The instrument is designed for easy operation and includes
the following features:
• Operator selection of Celsius or Fahrenheit scale
• Resolution of 0.1°
• Four-digit LCD
• Hold feature for temporarily retaining a reading
• Field calibration capability
• Low battery warning
• Built-in tilt stand for easy hands-free operation
• Standard 1/4 inch (6.3mm) phone jack connector
input
Use the correct thermistor (series 400) for your instrument. Using an incorrect probe type will result
in erroneous readings. (Series 500 thermistor
probes may be used along with the supplied correction chart to convert meter readings to actual
temperature). Insert the 1/4 inch plug into the mating connector on the top of the instrument.
1. Press the ON/OFF key. The thermometer performs a self-test and all display digits and indicators, as shown below, should remain on for
approximately two seconds.
2. If a probe is not connected or if the probe is defective, the displa y will indicate “oPEn”.
3. Select °C or °F by pressing the °C/°F key. Temperature scale can be switched at any time. The
thermometer retains the last selected scale the
next time you turn the power on.
4. For optimum instrument accuracy, allow one
minute for ambient temperature stabilization. If
the unit has been stored at an extreme ambient
condition, more time will be needed.
When taking temperature measurements, allow
time for the reading to stabilize. Multiplying the time
constant of the probe by 5 will give you the approximate time required.
If desired, press the HOLD key to retain the reading on the display . Press HOLD key again for normal operation.
The display will show “Ur” (under range) or “Or”
(over range) if the temperature reading is out of
range of the instrument.
The thermometer is factory calibrated and does not
require calibration before use. The CAL function allows single point calibration of the thermometer, at
0°C (32°F) to compensate for probe offset error. It
is not necessary to perform a field calibration to
obtain specified meter accuracy . Use the field calibration feature to improve thermometer/probe
accuracy.
1. Follow steps 1 through 4 in FIELD CALIBRA-TION CLEAR/UNLOCK section.
2. Pack sensing end of probe in a container tightly
packed with crushed ice and filled with distilled
water. Allow temperature to stabilize.
3. Press and release the CAL key to enter the calibration mode.
4. The display will momentarily show “CA” and then
the temperature reading starts blinking.
5. If the measured temperature is from –5°C to 5°C
(23 to 41°F), when the temperature reading is
stable, press the HOLD key to confirm
calibration.
The display will momentarily show “CO” and the
reading will be set to 0°C (32°F). The CAL indicator will turn on, indicating a field calibration is
active.
The field calibration is automatically
locked as well.
If “Err” is displayed, either the displa yed reading is
outside the above limits or the batteries are weak.
The calibration clear/unlock feature will cancel any
previous field calibration (the thermometer reverts
to the default factory calibration) and also enables
the field calibration operation.
1. Turn the thermometer off.
2. Hold the CAL key down while pressing the ON/OFF key .
3. Unit will first display 8888 then the firmware version number
4. When the CAL key is released, the unit will return to measurement mode.
FIELD CALIBRA TION LOCKOUT
The calibration lockout feature prevents any field
calibration changes. The lockout remains in eff ect
until a clear/enable has been performed. Use the
following procedures to lockout the field calibration
operation.
Lockout Procedure
1. Turn the thermometer off.
2. Hold the HOLD key down while pressing the ON/OFF key .
3. Unit will first display 8888 then the firmware version number
4. When the HOLD key is released, the unit will
display 8888 and then turn off. (If field calibration is already locked, the unit will return to measurement mode.)
Properly used, the thermometer should maintain
calibration indefinitely and not require service other
than occasional cleaning of the housing and changing of the batteries.
Do not clean with abrasives or solvents. Use mild
detergents, never immerse nor use e xcessive fluid.
BATTERIES
If there is no display when the thermometer is
turned on, check condition of the two AA batteries.
Also check that the battery terminals are clean and
batteries are properly installed. If replacement is
necessary, ref er to the BATTERY INSTALLATION
AND REPLACEMENT section for replacement
procedure.
SERVICE
There are no internal adjustments or userreplaceable parts.
Note: Serial number label is located inside battery
compartment.
The Manufacturer warrants this product to be
free from significant deviations from published
specifications. If repair or adjustment is necessary within the warranty period, the problem will
be corrected at no charge if it is not due to misuse or abuse on your part as determined by the
Manufacturer. Repair costs outside the warranty
period, or those resulting from product misuse
or abuse, may be invoiced to you.
The product is supplied with a 3-year warranty.
PRODUCT RETURN
To limit charges and delays, contact the seller or
Manufacturer for authorization and shipping instructions before returning the product, either
within or outside of the warranty period. When
returning the product, please state the reason
for the return. For your protection, pack the product carefully and insure it against possible damage or loss. Any damages resulting from improper packaging are your responsibility.
TECHNICAL ASSISTANCE
If you have any questions about the use of this
product, contact the Manufacturer or authorized
seller.
Trademarks bearing the ® symbol in this publication are
registered in the U.S. and in other countries.