7 specifications – Cooper Instruments & Systems DFI 200 Hand Held Indicator User Manual
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Version 3.1-0
4. Invalid Command. If the command received from the host is not valid then the unit may return the following:-
Where:
? is the character “?” (63 Dec, 3F Hex)
A is the responding units address
If the address received from the host does not match the units address then the unit will not respond at all.
7 SPECIFICATIONS
7.1 Technical specifications
Input:
Ratiometric 4 wire strain gauge.
Input Sensitivity:
80Ω to more than 2000Ω
Excitation:
5VDC
Accuracy:
Up to 0.005% of full scale for alarms and display, depending on sample rate etc., see
resolution table which follows. Using and
calibration method accuracy is 1%
Sample rate:
5 to 100 sample per second, selectable.
ADC Resolution:
Up to 22 bits depending on sample rate and mV/V input, see 7.4
Display update:
Up to 4 per second, apparent update varies with
setting
Conversion Method:
Sigma delta
Microprocessor:
HC68HC11F CMOS
Ambient temperature:
0 to 50o C
Humidity:
5 to 95% non condensing
Display:
4.5 digit LCD 11.7mm digit height display range -19999 to 19999
Power supply:
Battery 9VDC type 216 (alkaline recommended)
Battery life:
Typically 15 hours when switched on with 350 load cell connected
Low battery warning:
message plus beeper
Output (standard):
RS232 serial communications
7.2 Options
External memory:
Memory chip, 9 pin D connector and shell
7.3 Physical characteristics
Dimensions:
80mm (w) x 145mm (l) x 39mm (d)
Connections:
9 pin “D” connector (female at instrument end)
Weight:
250gms including battery
7.4 Resolution table
Effective resolution (bits) for DFI 200 over full scale – mV / V input