Electronic Controllers and Indicators
ELECTRONIC CONTROLLERS AND INDICATORS. All-electronic indicating, alarm/control and annunciating instruments designed for superior visibility, accuracy and ease of installation.
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Description:
General Features
- Display and alarm circuitry independent of one another.
- Plug in replaceability.
- Low power drain, noise immunity, cool running owing to C-MOS circuitry.
- High resolution accuracy.
- High ±0.5% resolution, accuracy of over ±1.0%. High reliability.
- Optically-isolated inputs.
- Simplified, one man installation with easy-locking swing-up catches.
- Front replaceable display and scales.
Specifications Common to All Models
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Parameter |
Specifications at Room Temperature and Rated Voltage |
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Scale Length
inches(mm) |
4.0(101.6) |
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Accuracy
(% of Span) |
1% |
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Reolution
(% of span) |
.5% |
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Response Time |
.5 seconds nominal full scale repsonse of indicator. Adjustable to 3.0 secs. |
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Input Imedance |
Current input DC and AC 300 mV maximum drop. Voltage input 25,000 ohms per volt minimum below 40V.
1 Megohm for 40V and greater.
Thermocouple Input- 100,000 ohms min for 10mV input. |
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Minimum Spans |
DC Voltage- 8mV
AC Voltage- 100mV
DC Current- 25 microA
AC Current- 25 microA at 500 ohms.
Thermocouple- 8mV
RTD or termistor- 3 ohms change at 5 mA. |
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Maximum Self-Contained Spans |
Current 500 MADC 5 AAC
Voltage 300 VDC 150 VAC |
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Input Power |
Standard 120V±10% 50/60 Hz 14 VA max.
Optional 220V±10% 50/60 Hz 14 VA max. |
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Weight |
4 pounds (1.8 Kg) |
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Connections |
Standard-Barrier Stip (Optional-Multipin Connector) |
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Line Voltage Effect |
<---- 0.05% per 1% of line change----> |
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Temperate Coefficient |
<---- 0.03% per °C ----> |
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Operating Temperature |
<---- °0C to °50C----> |
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Storage Temperature |
<---- -°20C to °70C----> |
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Seismic |
<----Designed to meet seismic requirements of nuclear power industry----> |
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Power "ON" indicator |
<---- First Bar always lighted----> |
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Set Point Marker |
<---- Double brightness bar----> |
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Alarm or Control Options |
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Accuracy |
±1/2% of span. ± one segment |
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Dead Band |
1% of span |
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Output Contacts |
Model 9270: DPDT 5A at 120 VAC or 28 VDC resistive load.
Model 9270S: DPDT 1A at 120 VAC or 2A 28 VDC resistive load. |
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