FEATURES

• 62.5 To 500 Samples per second (adjustable)
• mV/V adjust easily setup on front panel without external millivolt source
• 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
• Excitation for up to four 350 ohm bridges
• Span programmable from 1 to 199999 counts via front panel switches or RS232/422 interface
• Remote sensing for six wire hookup (optional)
• Analog output (optional)
• Four alarm points

MODEL 7600
The Series 7600 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. Set up of mV/V is done from the front panel of the unit with dip switches and the unit's own display. No external millivolt source is required so the unit does not have to go back to the calibration shop. The unit is ratiometric with all calibration voltages being referenced back to the reference fo the A/D chip, including the bridge excitation voltage which can drive up to four 350 ohm bridges. 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 Impedance:
12⁹ ohms

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 1.X.X.X.X.X)
Digital filter average set: 1 to 100 conversions
mV/V calibrate pushbutton and potentiometer
mV/V select dip switch 1.5mV/V through 3.5mV/V
Peak and valley reading display and reset

Visual indicators:
5 l/2 digits. .56" red LED with polarity

Outputs:
Four limit outputs +5V at limit, will sink 24mA
ASCII RS232 compatible: (optional)
ASCII RS422 compatible: (optional)
Baud rates: 300, 600, 1200, 2400, 4800, 9600
Analog output: (optional) 0 to ± 10VDC @ 1mA max.
Excitation output: 10VDC @ 120mA max.

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.