MODEL 309 FOUR CHANNEL DATALOGGING THERMOMETER
1
1.0 Introduction: This instrument is a four channel, recording digital thermometer for use with any Type K
thermocouple as temperature sensor. Temperature indication complies with the NIST and
IEC584 temperature/voltage tables for Type K thermocouples. Its internal memory can store
up to 16312 records per channel in any number of recording intervals. It is equipped with a
RS232 interface for bi-directional communication with a PC.
2.0 Specifications: Measurement Range: -200°C - 1370°C -328°F - 2498°F
Accuracy: (At ambient of 23 ± 5°C)
Range Accuracy
-200°C - 200°C ±(0.2% reading + 1°C)
200°C - 400°C ±(0.5% reading + 1°C)
400°C - 1370°C ±(0.2% reading + 1°C)
-328°F - -200°F ±(0.5% reading + 2°F)
-200°F - 200°F ±(0.2% reading + 2°F)
200°F - 2498°F ±(0.3% reading + 2°F)
Note:
The basic accuracy specification does not include the error of the probe. Please refer to the probe
accuracy specification for additional details.
Resolution: -200°C - 200°C: 0.1°C; 200°C -1370°C: 1°C
-200°F - 200°F: 0.1°F; outside this range: 1°F
Number of Sensor Inputs: Four Type K Thermocouples
Input Protection at Thermocouple Input: 60V DC or 24Vrms AC
Display: Four 4 Digit Temperature Displays plus Indicators, see Section 3.0
Switchable backlight
Sample Rate: 3 seconds per period
Time Function: Real time clock, see Section 4.6
Datalogging Capacity: 16,312 records per channel
Recording Interval: User adjustable, see Section 4.7
Digital Output: Bi-directional RS232. Software and Cable included
Power requirement: 9 Volt Battery, NEDA 1604 or JIS 006P or IEC6F22
Battery Life: Approx. 100 hours with alkaline battery; Low battery indication
Operating Conditions:
x Operating Temperature and Humidity: 0°C - 50°C (32°F - 122°F); 0 - 80% RH
x Storage Temperature and Humidity: -10°C - 60°C (14°F - 140°F); 0 - 80% RH
x Altitude: Up to 2000 meters (6500 feet).
Dimensions: 184×64×30 mm (5.4×2.5×1.2 in)
Weight: Approx. 250g (8.7 oz)
Accessories: Two Type K Wire Thermocouple Probes, Battery, Carrying Case,
Instruction Manual, Software, RS232 Cable
Option: AC Adapter: 9VDC ±15%; 100mA: Plug Diameter: 3.5mm×1.35mm
Temperature Coefficient:
For ambient temperatures from 0°C - 18°C
and 28°C - 50°C, for each °C ambient
below 18°C or above 28°C, add the
following tolerance into the accuracy spec.
0.01% of reading + 0.03°C
(0.01% of reading + 0.06°F)