Omega Engineering RD8900 user manual Specifications, Power, Display, Memory

1.8 Specifications

Power

90-250VAC, 47-63Hz, 60VA, 30W maximum

11-18VDC or 18-36 VDC, 60VA, 30W maximum

Display

6.1TFT LCD, 640X480 pixel resolution, 256 colors

Memory

8MB storage memory on board

Storage media: 16, 64, 128 MB CF ( Compact Flash ) cards

Analog Input Card (AI181, AI182, AI183)

Channels: AI181 ~ 1 channel, AI182 ~ 2 channels, AI183 ~ 3 channels

Resolution: 18 bits

Sampling Rate: 5 times/ second

Maximum Rating: -2 VDC minimum, 12 VDC maximum (1 minute for mA input)

Temperature Effect: ±1.5 µV/ ˚C for all inputs except mA ±3.0 µV/ ˚C for mA input

Sensor Lead Resistance Effect:

T/C: 0.2 µV/ohm 3-wire RTD: 2.6 ˚C耟/ohm of resistance difference of two leads

2-wire RTD: 2.6 ˚C耟/ohm of resistance sum of two leads

Burn-out Current: 200nA

Common Mode Rejection Ratio (CMRR): 120dB

Normal Mode Rejection Ratio (NMRR): 55dB

Isolation Breakdown Voltage between channels: 430VAC min.

Sensor Break Detection: Sensor opened for TC, RTD and mV inputs, below 1 mA for 4- 20mA input, below 0.25V for 1-5V inputs, unavailable for other inputs

Sensor Break Responding Time: Within 10 seconds for TC, RTD and mV inputs, 0.1 second for 4-20 mA and 1-5V inputs

Characteristics:
Type	Range	Accuracy	Input
		at 25 ˚C耟	Impedance
J	-120 ~ 1000 ˚C耟	±1 ˚C耟	2.2MΩ
	(-184 ~ 1832 ˚F)
K	-200 ~ 1370耟˚C	±1耟˚C	2.2MΩ
	(-328 ~ 2498耟˚F)
T	-250 ~ 400 ˚C	±1耟˚C	2.2MΩ
	(-418 ~ 752˚F)
E	-100 ~ 900 ˚C	±1 ˚C耟	2.2MΩ
	(-148 ~ 1652 ˚F)
B	0 ~ 1820 ˚C	±2 ˚C	2.2MΩ
	(32 ~ 3308 ˚F)	(200 ~ 1820 ˚C)
R	0 ~ 1768耟˚C	±2 ˚C	2.2MΩ
	(32 ~ 3214 ˚F)
S	0 ~ 1768 ˚C	±2 ˚C	2.2MΩ
	(32 ~ 3214耟˚F)

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