GRAPHTEC GL840 - Page 191

4-5
CHAPTER 4 Specication
Item Description
•
Temperature range
Type
Temperature
range
Resolution Measurement Range
R/S 100℃ F.S. 0.01℃ 0 to 100℃
500℃ F.S. 0.05℃ 0 to 500℃
2000℃ F.S. 0.1℃ R : 0 to 1600℃
S : 0 to 1760℃
B 500℃ F.S. 0.05℃ 400 to 500℃
2000℃ F.S. 0.1℃ 500 to 1820℃
K/E/T/J/N 100℃ F.S. 0.01℃ - 100 to 100℃
500℃ F.S. 0.05℃ K/E/J/N : - 200 to 500℃
T : - 200 to 400℃
2000℃ F.S. 0.1℃ K : - 200 to 1370℃
E : - 200 to 800℃
T : - 200 to 400℃
J : - 200 to 1100℃
N : - 200 to 2000℃
C (W) 100℃ F.S. 0.01℃ 0 to 100℃
500℃ F.S. 0.05℃ 0 to 500℃
2000℃ F.S. 0.1℃ 0 to 2000℃
Pt 100℃ F.S. 0.01℃ - 100 to 100℃
500℃ F.S. 0.05℃ - 200 to 500℃
2000℃ F.S. 0.1℃ Pt100 : - 200 to 850℃
JPt100/Pt1000 : - 200 to 500℃
* Measurement accuracy does not change due to the temperature range.
Reference contact compensation
accuracy
Internal/External switching
A/D converter Method : ΔΣ method
Resolution :16-bit (Effective resolution: About 1/40000 of the +/- range)
Temperature coefcient Gain : 0.01% of F.S./°C
Zero : 0.02% of F.S./°C
* Zero occurs at the sampling intervals of 10, 20, and 50 ms.
Input resistance 1MΩ ±5%
Allowable signal source resistance Within 300Ω
Maximum permissible input voltage Between +/– terminals : 20mV to 2V range (60Vp-p)
5V to 100V range (110Vp-p)
Between input terminal/input terminal : 60 Vp-p
Between input terminal/GND : 60 Vp-p
Withstand voltage Between input terminal/input terminal : 350 Vp-p 1 minute
Between input terminal/GND : 350 Vp-p 1 minute
Insulation resistance Between input terminal/GND : 50MΩ or more (at 500 VDC)
Common mode rejection ratio 90 dB or more (50/60 Hz; signal source 300Ω or less)
Noise 48 dB or more (with +/– terminals shorted)
Filter Off, 2, 5, 10, 20, 40
Filter operation is on a moving average basis.
The average value of the set sampling count is used.
If the sample interval exceeds 30 seconds, the average value of data obtained in a
sub-sample (30 seconds) is used.