ThermoWorks Precision User manual

PT100 to BS EN 60751
Precision &
Reference
Thermometers
Operating Instructions
MODEL ORDER CODE
Precision 222-553
Precision Plus 222-550
Reference 222-555
P-14-003-02-e Ref: 547-150 / 10.02.20
ThermoWorks, Inc.
Utah, U.S.A.
Ph: 801-756-7705 Fax: [phone]
www.thermoworks.com
SPECIFICATIONS
Precision / Precision Plus Thermometers
–328 to 1562°F (–200 to 850°C)
±0.4°F (±0.2°C) meter only
0.1°
3 or 4-wire RTD Class A, 100ohms
±0.1°F (±0.05°C) meter only
0.01° Auto-Ranging to 0.1° above 199.9°
3 or 4-wire RTD 1/10 DIN, 100 ohms
Interchangeable
After 10 min. to save battery life
3 x AAA, 2,000 hrs.
–4 to 122°F (–20 to 50°C)
NIST-traceable certificate included
Reference Thermometer
–328 to 400°F (–200 to 200°C)
±0.05°F (±0.03°C)
0.01°
4W RTD 1/10 DIN, fixed
3 x AAA, 2,000 hrs.
–4 to 122°F (–20 to 50°C)
UKAS Accredited Certificate included
Range
Accuracy (Precision)
Resolution (Precision)
Sensor (Precision)
Accuracy (Precision Plus)
Resolution (Precision Plus)
Sensor (Precision Plus)
Probe
Auto-Off
Battery
Environmental Range
Certificate
Range
Accuracy
Resolution
Probe
Battery
Environmental Range
Certificate
ACCESSORIES/RELATED ITEMS
Standard
Protective Boot
(THS-830-227)
SST Wall Bracket
w/Probe Holder
(THS-832-050)
Rubber Boot w/
Probe Holder
(THS-830-255)
Duracell Procell AAA
Battery, 4-pack
(PC2400)

INSTRUMENT OPERATION - Connect a probe via
the socket located on the top of the instrument
(where applicable). Screw the collar of the plug,
finger-tight to ensure a secure connection (do not
over tighten). The instrument is switched on by
pressing the ON/OFF button. Apply the tip of the
probe to the substance, medium, or surface 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.
HOLD (PRECISION, PRECISION PLUS ONLY)
Press the HOLD button to freeze the display. Press
again to continue measuring.
°C/°F - Press and hold the ON/OFF button for 5
seconds upon start up.
MAX/MIN (PRECISION, PRECISION PLUS ONLY)
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.
TRIM (PRECISION, PRECISION PLUS ONLY)
Press the MAX/MIN and ON/OFF buttons at start-up
for five seconds to enter (Offset is displayed). Press
HOLD (up) or MAX/MIN (down) to set the trim value
(maximum of ±2.00°C). Press the ON/OFF button to
save the value and exit Trim mode.
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 - This instrument should only be used
with PT100 (platinum resistance probes, 0°C = 100
ohms) BS EN 60751 fitted with suitable miniature
plug (where applicable).
BATTERY REPLACEMENT - The instrument will
display 'LO BAT' 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 batteries with three AAA batteries
located under the rear cover that is held in place by a
single screw.
GUARANTEE - This instrument carries a two-year
warranty against defects in either components
or workmanship. During this period, products
that 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. Full details of
liability are available within ThermoWorks’ Terms
& Conditions of Sale at www.thermoworks.com/
product-warranty.
For warranty, service, and technical assistance,
please contact ThermoWorks’ Technical Support
at [phone] or email at techsupport@
thermoworks.com.
Probe Wiring Diagram
PT100 Binder Plug Wiring
Precision / Precision Plus Thermometers
Pin numbering as viewed from rear
2
3
1 5
4
Function
+
+
- (3 Wire)
- (4 Wire)
Shield
Pin
1
2
3
4
5