ThermoWorks 231-022 User Manual

INSTRUMENT RECORD CARD

Therma Differential
AquaTemp

serial no. ________________________________

calibrated by ______________date ___________

Thermistor
Thermocouple

This instrument has been checked or calibrated
against reference instrument(s) calibrated by a
UKAS Accredited Calibration Laboratory.
Traceable to NIST.

model order code

Therma Differential 231-022

AquaTemp 231-041

32°F 212°F 1832 °F

ThermoWorks, Inc.

1762 W. 20 S. #100, Lindon, UT 84042

tel: [phone]

e-mail: [e-mail]

www.thermoworks.com

INSTRUMENT OPERATION - Connect probes
via the socket(s) located at the top of the instrument.
(The Therma Differential uses a miniature type K
thermocouple connector and the AquaTemp uses
a 6 pin Lumberg screw locking type connector).
Switch the instrument on and apply the tip of the
probe to the substance or medium to be measured.
The instrument reading may take a few seconds
to stabilize, depending on the nature of the
measurement and sensitivity of the probe.
HOL D - Press th e HOLD bu tton to s top
measurements, press again to continue measuring.
AUTO-OFF - The unit will switch off automatically
after 10 minutes. To disable auto-off press the
HOLD button while switching on the instrument
(this is reset when the instrument is switched off).
OPEN CIRCUIT/FAULTY PROBE - If the
probe has developed an 'Open Circuit' fault the
instrument will display 'Err'.
SENSORS - The Therma Differential should only be
used with type K (Nickel Chromium/Nickel
Aluminium)

50212).
The AquaTemp can be used with either an
interchangeable thermistor probe or a type T
thermocouple probe fitted with 6 pin Lumberg
screw locking connectors. This instrument is
designed to be compatible with ThermoWorks’
probes.
BATTERY REPLACEMENT - The instrument
will display a low battery symbol to warn that the
batteries will need changing soon. The instrument
continues to measure accurately but after further
usage the instrument will display 'flat bat' and
shutdown. Replace the three AAA batteries located
under the rear case half that is held in place by
six screws. Check the seal for damage and
carefully replace the rear case half and tighten
the screws.

thermocouple plugs (to BS EN

P-12-006/7-02-a

547-170/28.03.12

MAX/MIN - Press the MAX/MIN button to display
the values. The instrument retains the max/min
values when switched off. To reset, press the
MAX/MIN button for three seconds, 'rst' will be
displayed.
BACKLIGHT - Press the HOLD button for
two seconds to turn backlight on or off.
Backlight will timeout after 20 seconds. (Please
Note: the backlight will not operate if the low
battery symbol is being displayed.)
CALIBRATION TRIM - (AquaTemp only) Press
the MAX/MIN and ON/OFF buttons at start up
for five seconds to enter ('Offset' is
displayed). Press MAX/MIN to cycle (continuous
loop) the trim value in 0.1 steps up to ±2.0 ºC
(3.6 ºF). Press ON/OFF to save the value and exit
Trim mode.
MODE - (Therma Differential only) Press the
MODE button to scroll through T1, T2 or T1 - T2.
While displaying T1-T2, press the MODE button
for three seconds to reset the differential
reading to 0.0 °C/°F.
°C/°F - Press and hold ON/OFF button for five
seconds at start-up.
GUARANTEE - This instrument carries a one-year
warranty against defects in either components or
workmanship.
prove to be defective will, at the discretion of
ThermoWorks, be either repaired or replaced
without charge. This warranty does not apply to
probes, where a six-month period is offered. The
product warranty does not cover damage caused
by fair wear and tear, abnormal storage condi­tions, incorrect use, accidental misuse, abuse,
neglect, misapplication or modification. Full
details of liability are available within Thermo­Works’ Terms & Conditions of Sale at
www.thermoworks.com. In line with our policy of
continuous development, we reserve the right to
amend our product specification without prior
notice.

During this period, products that