User's Guide
Dual Input RTD Thermometer
Model 421504
99 Washington Street
Melrose, MA 02176
Fax 781-665-0780
TestEquipmentDepot.com
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.0780 - TestEquipmentDepot.com
Specifications
General Specifications
Display
5-digit LCD with overload/open-input indication
Over-range and open input Dashes are displayed in place of a temperature reading
Power Supply 9V battery
Battery life 100 hours typical with carbon zinc battery
Auto Power Off Meter turns off automatically after 30 minutes
Safety CE approved and water resistant meter housing
Weight 11.73oz. (365 g)
Dimensions 7.56 x 3.58 x 2" (192 x 91 x 52.5mm)
Accessories supplied 9V battery, RTD connectors (2), and protective holster
Range Specifications
Display Resolution
RTD Probe (Pt 385 100Ω)
RTD Probe (Pt 3926 100Ω)
Temperature units Selectable C or F temperature units
Accuracy
Temperature Coefficient Multiply the applicable accuracy specification per oC
Input Protection 24VDC or 24VAC rms max. input on any combination
Reading rate One reading per second
Input connectors Accepts standard 3-terminal RTD sub-miniature
Ambient Operating Range 32 to 122oF (0 to 50oC); less than 80% RH
Storage Temperature -4 to 140oF (-20 to 60oC); less than 70% RH
0.2
o
F or 0.1oC Resolution
-328 to 1472oF (-200 to 800oC)
(European curve Alpha = .00385)
-328 to 1166oF (-200 to 630oC)
(U.S. curve Alpha = .003926)
Accuracy is specified for operating temperatures in the
range of 64 to 82
year, not including the RTD probe error
±(0.05% rdg + 0.2oC) for oC Scale
±(0.05% rdg + 0.4oF) for oF Scale
from 0 to 18
o
F) by 0.1
122
of inputs.
NOTE: Max. Voltage between T1 and T2 during
measurement = 1V
connectors (flat blade, 7.9mm spacing)
o
F (18 to 28oC) for a period of one
o
C and 28 to 50oC (32 to 64oF and 82 to
Model 421504 Version 1.9 December 2004 3
Meter Description
1. RTD probe inputs
2. LCD multifunction display
3. Keypad
4. Protective holster
Note that the tilt stand and battery compartment are located on the back of the meter
Model 421504 Version 1.9 December 2004 4
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.0780 - TestEquipmentDepot.com
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