User's Manual
RTD Thermometer
Model 407907
Shown with RTD probe*
* Probe sold separately.
407907-EN v1.5 10/13
2
Introduction
Congratulations on your purchase of the Heavy Duty Extech 407907 RTD Thermometer which
offers high precision and selectable 0.1o and 0.01o resolution. The LCD display provides low
battery and overload indication. Selectable temperature units °C & °F provides measurement
versatility. This meter is shipped fully tested and calibrated and with proper use will provide years
of reliable service.
Specifications
General Specifications
Display
4-1/2 digit (20,000 count) LCD display with over-range
and low battery indication
Measurement
Temperature (selectable °C & °F units)
Data Hold
Freezes displayed reading
RTD Probes (sold separately)
4-wire platinum 100 RTD;
0.00385 alpha coefficient (meet DIN IEC 751)
RTD probe jack
Proprietary 4 pin circular connector
(uses Extech RTD probes – sold separately)
Sampling Time
Approximately 0.4 seconds
Memory record/recall
Meter stores Maximum and Minimum readings
Data Output
RS-232 PC Interface
Operating conditions
Temperature: 32°F to 122°F (0°C to 50°C); RH: < 80%
Power Supply
9V battery
Power consumption
15 mA DC (approx.)
Weight
0.53 lbs. (242g)
Dimensions
7.1 x 2.8 x 1.3” (180 x 72 x 32 mm)
Range Specifications
Temperature Ranges
Resolution
Accuracy (% of reading)
o
F
-199.99o to 392.00o F
0.01o F
± (0.1% + 0.4oF) *
392.0o to 1562.0oF
0.1o F
o
C
-199.99o to 199.00oC
0.01o C
± (0.1% + 0.2oC) *
200.0o to 850.0oC
0.1o C
* Probe accuracy is additional
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