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| | | Specifications Setpoint range: Nominal resistance ±20% min. Specify heater resistance to produce the necessary heat output in watts, given available voltage. Connections: Three pins on 0.1" centers or AWG 22 wires. Power supply voltage: 4.75 to 10 VDC or 7.5 to 60 VDC, depending on model. Ripple up to 10% has negligible effect; simple unregulated DC supplies are adequate for most applications. | | |
| | | Controller supply current: Output ON: 3 mA max. Output OFF: 2 mA max; 1 mA typical at 10 VDC. Ambient temperature: Operating: -40 to 70°C (-40 to 158°F). Storage: -55 to 85°C (-67 to 185°F). Relative humidity: 90% max. Physical: Epoxy sealed for moisture resistance. Will withstand wave soldering and water/detergent wash; contact Minco before cleaning with other chemicals. Weight: 1 ounce (28 g). Mounting: Mounting hole for #6 screw through, or #8 thread forming screw. Heater: Wire-wound or etched-foil heater with high temperature coefficient of resistance (TCR). | | |
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| | | Nominal heater current: 0.05 to 4 amps. See ranges Higher current possible with special models. Output ON | | below. | | |
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| | | Minimum output OFF resistance 50K fi 50K 50K 50K 50K | | |
| | | Minimum current Nominal heater for proper | | resistance Maximum in series current with heater (1 minute) (pin 3 to 2) | | |
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| | | sensing 0.012 A 0.050 0.125 0.350 1.0 | | |
| | | current CT198 0.05 to 0.2 A 0.21 to 0.5 0.51 to 1.5 1.51 to 3.0 2.50 to 4.0 | | |
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| | | 0.5 A 1.0 2.0 4.0 5.0 | | |
| | | 2.3 fi 0.8 0.5 0.3 0.25 | | |
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| | | Heater element Copper foil or wire (Cu) Nickel foil (Ni) Nickel wire (Ni) Nickel-iron foil or wire (NiFe) | | |
| | | TCR (fi/fi/°C) 0.00427 0.00536 0.00672 0.00519 | | |
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| | | Scan rate (temperature above setpoint): 1 second standard. 0.1 seconds to 10 seconds optional. Scan pulse width: 10 milliseconds. Led indicator: Indicates heater power on. Optional on leadwire versions. Calibration accuracy: ±0.2% std*. Note that standard resistance tolerance on heaters is ±10%. Hysteresis: 0.05%*. Setpoint drift due to: Self-heating: ±0.2%* (±0.4% for 1.5 to 4 A range). Ambient temperature: ±0.02%/°C* (±0.06%/°C for 1.5 to 4 A range). Supply voltage change: ±0.03%/volt*. Supply voltage ripple effects: Negligible, assuming 50/60Hz, 10% max. ripple. | | |
| | | To convert resistance deviations to temperature: | | |
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| | | AT = % deviation \ T + | | |
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| | TCR Where: TCR = Temperature coefficient of resistance (fi/fi/°C) T = Setpoint temperature (°C) AT = Temperature deviation (°C) For example, assume a Heaterstat setpoint of 50°C, and heater TCR of 0.00536 fi/fi/°C (nickel foil). Calibration accuracy is ±0.2% of nominal resistance which translates to temperature as: | |
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| | | 1 | | |
| | | AT = ± 0.2% \ 50°C + | | |
| | | = + 0.47°C | | |
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| | | 0.00536 | | |
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| | | °3 ^ - <n CD t/1i—-— o-o | | |
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| | | Specifications subject to change | | |
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| | | 45 | | |
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