REED C-370 User manual

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Model
Digital RTD Thermometer
Instruction
Manual
C-370
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Table of Contents
Features......................................................................................... 3
Specications.............................................................................3-4
Instrument Description ...............................................................5-6
Operating Instructions................................................................7-9
Temperature Measurement ......................................................... 10
Temperature Meter Calibration Setup ....................................10-14
Pt type selection...................................................................................11
0°C Calibration ............................................................................... 12-13
Recall default factory setting value ......................................................14
Battery Replacement................................................................... 15
Product Maintenance .................................................................. 16
Temperature Probe...................................................................... 16
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REED products, contact REED Instruments at [email protected].
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Features
This digital RTD thermometer is to be used with platinum-type
temperature sensors. The temperature indication follows the IEC751
temperature table for PT-type sensors.
• IP67 waterproof housing
• Platinum resistor temperature sensor requires less temperature
compensation than thermocouple units
• 4-digit LCD readout with LED backlight
• °C/°F switchable
• Min/Max/Avg functions
• Relative mode and Data hold
• Low battery indication with auto power off
• Includes piercing type temperature probe
(Pt-100, IEC751 Class A accuracy)
• Ideal for food service applications
Specifications:
Measurement Range: -100°C ~ 300°C; -148°F ~ 572°F
Resolution: 0.1°C; 0.1°F;
Sensor types: Platinum resistance temperature sensor for
pt-100, pt-500, pt-1000 (selectable) 4 wires
ALPHA=0.003850
Measurement current: Approx 0.53mA
Maximum Voltage at
thermocouple input: 60V DC, or 24Vrms AC
continued ...
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Environmental:
• Operating Temperature and Humidity:
0°C ~50°C (32°F - 122°F); 0 - 80% RH
• Storage Temperature and Humidity:
-10°C to 60°C (14°F - 140°F); 0 - 80% RH
• Altitude up to 2000 meters
Accuracy (at 23 ± 5°C):
Range Accuracy
-100°C ~ 300°C ±(0.1% reading + 0.4°C)
-148°F ~ 572°F ±(0.1% reading + 0.8°F)
Temperature Coefcient:
For ambient temperatures from 0°C to 18°C and 28°C to 50°C, for each
degree celcium ambient below 18°C or above 28°C add the following
tolerance into the accuracy specication ...
0.01% of reading + 0.03°C ( 0.01% of reading + 0.06°F )
The basic accuracy Specication does not include the error of
the probe, refer to the probe accuracy specications (on page 16) for
additional details.
Sample Rate: 2 times per second
Water resistance: IP67
Power Supply: Battery 1.5V x 3 size AAA
Battery Life: Approx. 100 hours with alkaline batteries
Dimensions: 150 × 66 × 31mm
Weight: 175g Approx.
Accessories: Pt-100 Probe (class A) (model TP-R01),
batteries and instruction manual
Optional Accessories: Pt-100 Probe (class A) (model TP-R01),
soft carrying case (model CA-05A)
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Instrument Description
1 — Pt type temperature sensor connector
2 — LCD display
3 — Power ON/OFF button
4 — HOLD button
5 — MAX/MIN/Average control button
6 — Back light button
7 — Relative readout button
8 — °C/°F control button
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Display
Symbol denitions
and button locations
-This indicates that the minus temperature is sensed
°C/°F Celcius and Fahrenheit indication
Pt xxx Platinum Type Indication
HOLD This indicates that the display data is being held
MAX The Maximum value is being displayed
MIN The Minimum value is being displayed
AVG The Average value is being displayed
REL The reading is under Relative Mode
The battery power level indication
This indicates Auto Power Off is enabled
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Operating Instructions
Turning the meter on
Press the button to turn the thermometer ON or OFF.
Connecting the temperature probe
For measurement, plug the temperature probe into the input connectors.
Selecting the Temperature Scale
When the meter is rst turned on, the default scale setting is set to the
Celsius (°C) scale. It can be changed to Fahrenheit (°F) by pressing
“°C/°F” button and vice versa back to Celsius.
Data-Hold Operation
To hold the present reading and keep it on the display, press the “HOLD”
button. When the hold data is no longer needed, release the data-hold
operation by pressing “HOLD” button again.
When the meter is under Data Hold operation, the “ REL”, AVG
MAX MIN
and “°C/°F” buttons are disabled.
Back light Operation
Press the “Back Light” button to turn the back light on, press it once
again to turn it off.
The meter will turn the back light off automatically if the “Back Light”
button is not pressed after 10 seconds.
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Relative Operation
When the “ REL” button is pressed, the meter will memorize the present
reading and the difference between the new reading and the memorized
reading and the result will be shown on the display. Press the “ REL”
button again to exit the relative operation.
MAX/MIN/AVG Operation
When the AVG
MAX MIN button is pressed, the meter will enter the
MAX/MIN/AVG mode. Under this mode the maximum value, minimum
value and average value will appear simultaneously. The average value is
calculated using the last 8 readings from the memory, it will update with
every new reading.
When the MAX symbol is displayed, the Maximum value is shown on the
display.
Press AVG
MAX MIN again and the NIN symbol is on the display and also the
minimum reading.
Press AVG
MAX MIN again and the AVG symbol is on the display as well as the
average reading.
Press AVG
MAX MIN again and the MAX, MIN and AVG will blink together. This
means that all these readings are updated in the memory and the reading
is the current temperature.
Press AVG
MAX MIN to circulate the display mode among these options.
When the meter is under AVG
MAX MIN operation, the “ REL” and “°C/°F”
functions are disabled.
To exit the MAX/MIN mode, one may press and hold AVG
MAX MIN for two
seconds.
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Auto Power Off
By default, the meter is in auto power off mode. The meter will power itself
off after 30 minutes without operation.
To disable the auto power off, press and hold the “HOLD” button and turn
the meter on. There will be two successive beeps to indicate that the auto
power off has been disabled.
Low Battery
This meter indicates the battery power level directly on the display. Use
this reference guide to establish battery power level.
Battery power level is FULL, you can still
take measurements.
Battery power lever is LOW, the battery
will need to be replaced, you can still take
measurements.
Battery power lever is EMPTY, the batteries
need to replaced (size AAA, 1.5V x 3). You
can no longer take measurements.
For complete instructions on how to replace the batteries see page 15.
For service on this or any other REED product or information on other
REED products, contact REED Instruments at [email protected].
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10
Temperature Measurement
Correct Measurement Method
The temperature sensor is located at the
end of the metal sheath of the sheath type
temperature probe. To accurately test in-
ternal temperatures, insert the probe to a
distance of at least 15 times the diameter
of the sheath directly into the item you
want to measure.
Connector Configuration
Temperature Meter
Calibration Setup
This diagram shows
the button functions when
you are entered into
calibration mode.
Source -
Sense +
Source +
Sense -
NC
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