FEATURES

• 62.5 To 500 Samples per second (adjustable)
• Differential input
• Auto tare up to 50% with front panel pushbutton or remote input
• Digital filtering for stable display reading
• RS232 or RS422 outputs available
• Peak and valley detect and hold
• ± 15VDC excitation for transducer
• Span programmable from 1 to 199999 counts via front panel switches or RS232/422 interface
• Analog output (optional)
• Four alarm points

SERIES 7700
The Series 7700 is a new generation user friendly, high speed, high resolution voltmeter/controller. The 12 bit analog to digital converter has an adjustable update of 62.5 to 500 times per second and every reading is checked against four limits and the peak and valley readings. The 12 bit analog to digital converter updates 500 times per second and each reading is put into storage for the front end digital filter. The front end filter can be programmed to be a digital average of 1 to 8 conversions and the peak, valley and four limits are checked against this number. The output of the front end filter is fed into the display filter which can be programmed to take the digital average of 1 to 100 of the averaged numbers from the front end filter. The span and four limits are easily programmed via the front panel switches or RS232/422 and can be set to any number from ± 1 to ± 199999. Auto tare of ± 50% of span is accomplished with a front panel bush button or via remote switch closure and automatically offsets the optional analog output to zero. Excitation of ± 15VDC and + 5VDC to drive transducers are standard and input is differential type. RS232 or RS422 options are available for easy integration into larger systems and various power supply options are available with 115VAC being standard.

SPECIFICATIONS
Accuracy:
± .05% of reading ± 2 counts of A/D @ 25°C. Temperature coefficient of 25PPM/degree Celsius.

Resolution of A/D:
12 bits

Input bias current:
± 50nA maximum ± 100pA/°C.

NMRR:
70db

CMRR:
70db

Rollover error:
± 3 counts of A/D

Front Panel Controls: (Located behind lens)
Span adjust switches
Tare pushbutton (optional through lens)
Decimal point selector switch (5 decimal points I.X.X.X.X.X)
Digital filter average set: 1 to 100 conversions
Peak and valley reading display and reset

Visual indicators:
5 l/2 digits. .56" red LED with polarity
Outputs: +5V at limit, Four limit outputs, will sink 24mA

ASCII RS232 compatible:
(optional)

ASCII RS422 compatible:
(optional)

Baud Rate:
300,600,1200,2400,4800,9600

Analog output:
(optional) 0 to ± 10VDC @ 1mA max.

Excitation output:
± 15VDC and 5VDC @ 30mA

Sample Rate:
62.5 to 500 per second for peak, valley, and limits.
Display update four times per second.

Input Filter:
2.5 KHz single pole passive filter. Digital filter for display only can be set to be an average of 62.5 to 500 conversions. Front end filter can be set to be an average of 1 to 8 conversions.

Power:

115VAC 50-400 Hz		8 watts maximum
230VAC 50-400 Hz		8 watts maximum (optional)
10-30VDC 500 mA maximum		(optional)
5VDC 600 mA maximum		(optional)

Remote Inputs:
Tare
Display peak reading
Display valley reading
Remove tare
Reset peak/valley reading

Operating temperature:
-20° to +60° Celsius.

I/O Method:
Input power via screw terminals. 2 subminiature "D" connectors for strain gage hookup and RS232 output. Mating "D" connector for strain gage hookup is supplied with unit. See option 29 for second connector.