Download INSTRUCTION MANUAL 770PC PROCESS CONTROLLER

CHAPTER 5. TRANSMITTER OPERATIONS
od: +/- 0.00254 Mohms.
Other sources of error: Connectors
and/or cable.
Temperature Accuracy: +/- 0.03 DegC
after factory calibration.
VOLTAGE CALIBRATOR
SPECIFICATIONS
VOLTAGE SOURCE
Voltage Output: 0.4 volts (1.2 volt output
goes through a resistor divider).
Conditions: Ambient temperature range Temp Coefficient: +/-10ppm / DegC
of 20-30 DegC.
=+/- 0.0001% / DegC
=0.012mV / DegC
Voltage Accuracy: +/- 0.17mV after factory calibration.
Noise: 5 uV RMS
RESISTANCE SOURCES
Long Term Stability: Not available.
Other sources of error: Resistors for
Resistor Values Used: Four calibrators voltage divider, connectors, cable.
are available for calibrating the four range
resistors in the 770PC. These calibrators 5.15. USING THE FUNCTION KEY
are specified in table 5.2.
While the transmitter is displaying meaCalibrator Resistor
Temp.
Temp.
surement data, the Function key can be
Value
Resistor
˚C
used to access some special information.
(ohms)
(ohms)
The following functions are available.
1
1.816 M
1097.6
25.1
2
100K
1300.0
77.7
3
10K
1097.6
25.1
4
1K
1097.6
25.1
Function
Number
1
The current software revision levels
are displayed: Programmed
EPROM part number, measuring
software revision level, and option
board software revision level.
2
For Flow Sensors, the totalized flow
is displayed with extended precision
(7 digits) for a more accurate measurement (useful for billing purposes).
Table 5.2
Accuracy: +/- 0.25%
Temp Coefficient: +/-100ppm/DegC=+/0.01%/DegC.
Long Term Stability: After 1000, +/0.07%.
60
Result