OMEGA

CT7100 1 or 2 Channel Programmable Universal Input Circular Recorders

Single and Dual Pen Circular Recorder with Digital Display

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CT7100 1 or 2 Channel Programmable Universal Input Circular Recorders 13263

Supported Applications

The Omega CT7000 Series consists of microprocessor-based circular chart recorders designed to measure, display, and control up to two process variables. These hybrid paper recorders are configured for applications requiring continuous data logging on a 254 mm (10") circular chart alongside digital monitoring via front-panel LED displays.

Documented measurement capabilities include temperature sensing using thermocouples or RTDs, as well as electrical signal acquisition from millivolt and current inputs. The series supports process control functions including on/off and PID control in specific model configurations.

Operating Conditions & Performance

The CT7000 Series operates within an ambient temperature range of 0 to 55°C (32 to 131°F) with a humidity rating of 0 to 90% RH, non-condensing. Storage temperatures are specified from -40 to 65°C (-40 to 149°F). The unit features a gasketed cover constructed from black structural foam and weighs up to 9.1 kg (20 lb).

Performance specifications vary by input type:

• Thermocouple Types J, K, T, E, N and RTD accuracy: ±0.25% of reading + 1° @ 25°C (77°F)
• Type R, S, B, C Thermocouples accuracy: ±0.25% of span @ 25°C (77°F)
• mVdc and Vdc accuracy: ±0.25% of scaled span plus 1 least-significant digit
• Ambient Temperature Error Limit: 0.01% of span per °C (1.8°F) deviation from 25°C (77°F)
• Record Error Limit: ±0.5% of chart span or better, typically; ±1.0% of chart span maximum
• Pen Response (Full Scale Deflection): 20 s

The recorder supports a vibration rating of 0.5 to 100 Hz @ 0.2 g.

Measurement Ranges by Input Type

• Type J: 0 to 760°C (0 to 1400°F)
• Type K: 0 to 1360°C (0 to 2500°F)
• Type T: -220 to 400°C (-330 to 750°F)
• Type E: 0 to 750°C (0 to 1400°F)
• Type N: 0 to 1300°C (0 to 2370°F)
• Type R, S: 200 to 1650°C (400 to 3000°F)
• Type B: 200 to 1800°C (400 to 3300°F)
• Type C: 200 to 2300°C (390 to 4170°F)
• RTD: 100 Ω (0.00385 Ω/Ω/°C), -140 to 400°C (-220 to 750°F)
• Voltage DC: 0 to 25 mV, 0 to 50 mV, 0 to 5 V, 1 to 5 V

Resolution and Output Limits

• T/C and RTD Resolution: 0.1 or 1°
• mVdc and Vdc Resolution: 0.001, 0.01, 0.1 or 1
• Process Value Output Error Limit: ±0.5% of span
• Load Resistance (Current Outputs): 0 to 20 mA DC or 4 to 20 mA DC into 650 Ω max

Configuration Options

The CT7000 Series is available in configurations supporting one or two recording pens, with options for alarm relays and control functionality. The recorder accepts isolated inputs and features user-configurable alarm settings including hysteresis adjustment.

• Power Supply: 115/230 Vac ±10%, 50/60 Hz
• Housing Material: Gasketed cover; black, structural foam
• Display: 4-digit LED displays per pen
• Chart Size: 254 mm (10") circular chart
• Digital Communications: Optional

Available Output Signals

• SPST relay output
• SSR driver output
• 4 to 20 mA DC (user configurable to 0 to 20 mA DC) for retransmitting the process value or control

Accessories and Consumables

• Pens: CT7000-RED (channel 1 only), CT7000-GREEN (channel 2 only)
• Circular Paper: CT7000C series, available in various range/time configurations
• Probes: Low-noise thermocouple probes sold separately (e.g., GKQSS-316G-12, GTQSS-316G-12)

Key Product Differences

The series includes specific model variants distinguished by the number of pens and relay outputs:

• CT7100: Recorder, circular, 1 pen
• CT7110: Recorder, circular, 2 pens
• CT7102: Recorder, 1 pen, 2 relays
• CT7102-XPS: Recorder, 1 pen, 2 relays, transmitter power supply
• CT7114: Recorder, 2 pens, 4 relays
• CT7202: Recorder with control capability, 1 pen, 2 relays
• CT7224: Recorder with control capability, 2 pens, 4 relays

• 1 or 2 Pen Versions, 250 mm (10') Chart
• mv, V, mA, Thermocouple or RTD Inputs
• Programmable Inputs
• Optional Alarms
Alarm ModesActive High Output, Active Low Output, Adjustable
Battery Lifeup to 5 yr
Chart Diameter254 mm
Chart NoteChart Span: Bottom and top of span, -9999 to 9999 units; Chart Drive: DC Stepper Motor; Chart Drive: Stepper Motor
Chart Speed0.1 to 999.9 Hours
CMRR90 dB minimum; 24 Vac maximum for RTD input; 15 Vac maximum for other inputs
Current Measurement Range4 to 20 mA
Cutout Dimensions321 x 343 mm
DeadbandRecording: 0.3%
Display NoteDigital Displays: 2 possible: 1 per installed pen; (4) 7-segment digits, 14 mm (0.56”) high, red LEDs, automatic (-) positioning, decimal point positioning Keypad: Located on front cover, tactile feedback membrane keys, Display/Record Filter: 1 to 20 Scans. Alarm Display: 2 alarm indications possible per pen; ALRM1 and ALRM2; red LEDs; single ALRM indication provided for controller pens
Display TypeLED
Filter1 to 20 Scans
height335 mm
LED IndicatorsLED indicates Out 1, Out 2, Man, Ramp, Soak, Seg 1 through Seg 6, process units as applicable
Length92 mm
MaterialsPlexiglass
Measurement Range NoteThermocouple: J: 0 to 760°C, K: 0 to 1360°C, T: -220 to 400°C, E: 0 to 750°C, N: 0 to 1300°C, R: 200 to 1650°C, S: 200 to 1650°C, B: 200 to 1800°C, C: 200 to 2300°C RTD: -140 to 400°C Current: 4 to 20 mA Voltage: 0 to 25 mV, 0 to 50 mV, 10 to 50 mV, 0 to 5 V, 1 to 5 V
Measurement TypeThermocouple, RTD, Current, Voltage
NMRR85 db @ 60 Hz or greater
Operating Temperature, Max55 °C
Operating Temperature, Min0 °C
Pen TypeDisposable Fiber tip
Power Consumpstion25 VA
Relative Humidity0 to 90% RH, non-condensing
ResolutionPen Resolution: 0.15%
Response Time20 sec
RTD Type100 Ω Pt sensor; α= 0.00385
Sampling Rate1 Scan/sec
Sensor Break DetectionSensor Fault Detection: Displays “Hi” or “Lo” process input (10% above or below range) and sensor break “SnSr”; pen action on error condition is user configurable to 0 or 100% of chart span; on/off outputs go “off”; proportional outputs go to user-defined value from 0 to 100%
Series IDCT7000-Series
Standard Limits of ErrorError Limit: Measurement Error Limit: Thermocouple Types J, K, T, E, N and RTD: ±0.25% of reading + 1° @ 25°C (77°F); Type R, S, B, C Thermocouples: ±0.25% of span @ 25°C (77°F); mVdc and Vdc: ±0.25% of scaled span plus 1 least-significant digit Ambient Temperature Error Limit: 0.01% of span per °C (1.8°F) deviation from 25°C (77°F) Process Value Output Error Limit: ±0.5% of span Record Error Limit: ±0.5% of chart span or better, typically; ±1.0% of chart span maximum; Calibration Shift: Self-compensating for ambient temperature; all calibration values are stored in memory; Process Value Output Error Limit: ±0.5%; Record Error Limit: ±0.5%
Storage Temperature, Max65 °C
Storage Temperature, Min-40 °C
Supply Power Note115 Vac ±10%, 50/60 Hz
Supply Power TypeAC
Switch Rating2 A @ 115 Vac, 1 A @ 230 Vac
Switch TypeSPST
Temperature Measurement RangeJ: 0 to 760°C, K: 0 to 1360°C, T: -220 to 400°C, E: 0 to 750°C, N: 0 to 1300°C, R: 200 to 1650°C, S: 200 to 1650°C, B: 200 to 1800°C, C: 200 to 2300°C, RTD: -140 to 400°C
Thermocouple TypeJ, K, T, E, N, R, S, B, C
Vibration0.5 to 100 Hz @ 0.2 g
Voltage Measurement Range0 to 25 mV, 0 to 50 mV, 10 to 50 mV, 0 to 5 V, 1 to 5 V
Weight9.1 kg
Width384 mm
Wire Code Option2- or 3- Wire

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