Streck Temp-Chex Digital II Gebrauchsanweisung

Temp-Chex Digital II
INSTRUCTIONS FOR USE
The Temp-Chex Digital II thermometer assembly is designed as a convenient device for monitoring the
temperature when storing a variety of products including clinical laboratory reagents, controls, and
patient specimens.
PRINCIPLE
Temp-Chex Digital II is comprised of a digital thermometer base unit and accompanying stainless steel
temperature probe. This thermometer is manufactured to meet NIST standards of accuracy and is certified
traceable to NIST standards. Temp-Chex Digital II is accurate to ±0.5 °C between -50 °C and 70 °C. Temp-
Chex Digital II is not a NIST or DKD thermometer.
COMPONENTS
The stainless steel temperature probe comes within a pre-assembled plastic vial/probe unit containing
glass beads as filler material. This plastic vial/probe unit connects to the thermometer base unit through
the use of a metal cord. The base unit can be attached magnetically, with adhesive, or by keyhole to any
compatible exterior surface.
CALIBRATION STATEMENT
Prior to shipment, Temp-Chex thermometers are stored in a controlled environment. With proper care,
the thermometer should maintain its accuracy. Due to use in diverse applications and handling, there
is no precise way to predict how long calibration will be maintained. As with any thermometer, drift is a
possibility and accuracy can be affected by shock, aging, temperature and contamination through daily use.
Periodic recalibration or verification should be scheduled by each laboratory in accordance with its
accrediting agency and/or established procedure. At a minimum, annual recalibration or verification
from the date the thermometer is put "in use" is good lab practice. A space is provided at the top of the
Certificate of Calibration to record the "in use" date. The date of certification listed for this thermometer
is for reference use only. While annual recalibration is good lab practice or may be required by your
laboratory's accredited body, a calibration due date is listed as the final date guaranteeing calibration. The
date of certification listed for this thermometer is for reference use only. Recalibration is recommended
for use of unit beyond the calibration due date. Please contact Streck Technical Service at 800-843-0912 or
technicalservices@streck.com with any questions.
INSTRUCTIONS FOR USE
1. Unpack the thermometer base unit and the plastic vial/probe unit with the connector cord. Connect the
sensor probe to the unit.
2. Slide the battery cover open and remove the battery strip to turn on the unit. The display will open to
the MIN/MAX mode.
3. Select the temperature unit by the [°C-°F] switch under the battery cover. The unit is now ready to be
placed into service. Record readings once the temperature has become stable.
4. Place the plastic vial/probe unit inside of the temperature-controlled area. Mount the base unit outside
of this area. To mount the Temp-Chex Digital II:
a. Prior to attachment of the base unit, determine if the wall is ferrous metal and will allow use of the
magnetic section. If so, make sure the surface is clean and free of any moisture or frost. Place the
enclosed magnet on the surface and then attach the Temp-Chex Digital II base unit. Verify that it will
hold properly before placing into service.
b. If the wall is not ferrous metal or if the surface does not provide proper magnetic attraction, the
adhesive surface of the enclosed magnets can be used. The surface should be clean and dry. First
check that the two magnetic parts adhere to each other (if incorrectly aligned, the magnets will
repel each other). Maintain proper orientation of the magnetic strip when attaching it to the freezer,
incubator, or refrigerator wall. Remove paper backing from the second magnet, attach the adhesive
side to the wall and allow a few minutes to establish the appropriate bonding prior to attaching the
magnet already affixed to the Temp-Chex Digital II base unit. It is safest to attach the base unit to
walls in such a position that a shelf can support it. However, provided the appropriate attachment
procedure has been followed, the base unit should remain stationary.
FUNCTIONS
DISPLAY MODES
When the unit is powered on, the default display is the MIN/MAX mode.
Press the [MODE] button once to change the display to the LO/HI alarm mode.
Press the [MODE] button again to change the display to the DATE/TIME mode.
Press the [MODE] button again to change the display to the MIN/MAX mode.
SETTING DATE AND TIME
To set the date and time, press the [MODE] button to display the DATE/TIME mode.
Press the [SET] button under battery cover. The setting to adjust will flash. Press either the [ ↑ ] or [ ↓ ] button
under battery cover to change the year setting, then press [SET]. Use the [ ↑ ] or [ ↓ ] button to change the
date, then press [SET]. Use the [ ↑ ] or [ ↓ ] button to change the time, then press [SET]. Use the [ ↑ ] or [ ↓ ]
to update AM/PM, and then press [SET] to accept. Note: Only PM will display on the unit.
TURNING AUDIBLE LOW/HIGH ALARM ON OR OFF
NOTE: The unit will automatically record the date and time of an out of alarm limit when the Low/
High alarm is turned on. The unit will record 10 events.
In the LO/HI alarm display mode, press the Alarm (
the alarm is on, the ( ) icon will be displayed. The icon will be displayed in the LO/HI alarm and MIN/
MAX display modes.
SETTING ALARM
These settings are user-defined based on the laboratory's criteria for the controlled environment.
To set the Low/High alarm, press the [MODE] button to display the LO/HI Alarm mode.
Press the [SET] button under the battery cover.
Enter the low alarm temperature setting by pressing the [ ↑ ] or [ ↓ ] button under the battery cover, then
press [SET].
Enter the high alarm temperature setting by pressing the [ ↑ ] or [ ↓ ] button under the battery cover, then
press [SET].
When the temperature reading exceeds the user-defined low or high alarm values, the alarm will
sound, the LO ALM or HI ALM icon will flash and the LED in the bottom right hand corner of the unit
will flash. The alarm will sound for one minute. After that time, the sound will be two beeps every
one minute to preserve battery life. The audible alarm will stop when the temperature returns to
within the alarm limits but the LED will continue to flash until the memory is cleared by pressing the
clear button under the battery cover.
) button to turn on or off the alarm function. When
LOW/HIGH ALARM DATE/TIME STAMP
In the LO/HI alarm display mode, press the [EVENT] button to read the LO/HI alarm generated with its
associated date/time stamp.
Press either the [ ↑ ] or [ ↓ ] button under the battery cover to scroll through the date/time stamped events.
Press the [EVENT] button to exit the reading mode.
To clear the LO/HI memory, scroll through the Date/Time stamped events and press the [CLEAR]
button to permanently delete all LO/HI events in memory.
MIN/MAX TEMPERATURE
In the MIN/MAX display mode, the display will read the current temperature and the MIN/MAX
temperature memory.
Press the [EVENT] button to read the MAX temperature and the date and time of the reading.
Press the [EVENT] button to read the MIN temperature and the date and time of the reading.
Press the [EVENT] button again to return to the MIN/MAX display mode.
To clear the MIN/MAX memory, press the [CLEAR] button to permanently delete all MIN/MAX events
in memory.
LIMITATIONS:
• Do not remove probe from unit. If probe is disconnected, the alarm will sound and a red light will flash.
Reconnect the probe, wait for the audible beep to stop, then press the Alarm (
alarm off. Flashing will stop. Press the Alarm button to enable the audible alarm and continue using
the unit.
• The base unit should not be exposed to extreme temperatures.
• Avoid transferring probe unit directly from one extreme temperature environment to another (e.g.,
freezer to oven); instead, allow unit to slowly adjust to room temperature first.
• Do not immerse plastic vial/probe unit in liquid (e.g., water baths).
• If the thermometer is placed outside of the range of designed use, the display may read the following:
"LLL" when used below -50 °C, "HHH" when used above 70 °C.
• If using the thermometer within the range of designed use and the display reads "LLL" or "HHH", make
sure the probe is inserted correctly.
BATTERY
The battery life for this unit is typically one year. Replace the AAA batteries if:
• The Low Battery Voltage symbol begins flashing.
• There is no display (the battery may be discharged).
• Readings are inconsistent.
SPECIFICATIONS
Measurement Range: -50 °C to 70 °C / -58 °F to 158 °F
Accuracy:
±0.5 °C between -50 °C and 70 °C.
Display resolution: 0.1 °C
Sampling rate: 1.0 second
Battery: 1.5V AAA
Display size: 47 mm (W) x 39 mm (H)
Probe size: 40 mm (L)
Probe cord length: 1550 mm
Product size: 124 mm (H) x 75 mm (W) x 19 mm (D)
Product weight: ≈138 g
ORDERING INFORMATION
Please call our Customer Service department at 800-228-6090 for assistance. Additional information can be
found online at streck.com.
INTERNET CERTIFICATE OF CALIBRATION DIRECTIONS
A translated, generic Certificate of Calibration can be obtained at streck.com using the Temp-Chex Digital II
product page, by calling 800-843-0912 or by calling your local supplier.
GLOSSARY OF SYMBOLS
See the Instructions (IFU) tab under Resources on the product page at streck.com.
See streck.com/patents for patents that may be applicable to this product.
Streck
7002 S. 109 Street, La Vista, NE 68128 USA
) button to turn the
350646-3
2025-03