Noshok
820/821 Series Digital Temperature Indicators
820/821 Series Digital Temperature Indicators
Key Features
- Large 4-digit LED display
- Field re-programmable with optional PC interface module and software
- Software includes a security feature to prevent accidental re-programming
- 4 mA to 20 mA programmable linearized signal output
- Utilizes self-calibration feature for accurate and stable performance
- Optional fully programmable switch output, relay or transistor
- Utilizes PT100 ? RTD Class A element for temperature sensing
- M12 x 1 (5-pin) plug or 36” integral cable electrical connection
- IP 65 / NEMA 4 rated environmental protection
- All 316 stainless steel construction
- Easy installation with various mounting configurations
Application:
- Replacement for bimetal, liquid bulb and glass thermometers
- Pharmaceutical
- Food preparation
- Utilities and municipal refineries
- Chemical and petrochemical plants
- Paper mills
- Hydraulics
SPECIFICATIONS | |
Temperature ranges | Standard ranges from -325 °F to 1,100 °F (-200 °C to 600 °C) Customer rescalable with optional PC interface and software |
Temperature sensor | RTD (PT100 DIN EN 60751, Class A) |
Housing material | 316 stainless steel |
Probe material | 316 stainless steel standard |
Maximum pressure | 500 psig (on probe) |
Power supply | 9-36 Vdc, polarity protected |
Supply effect | 0.005%/V |
Power consumption | 15 mA @ 24 Vdc + output current – 950 mW max. 20 mA @ 24 Vdc for PNP output – 500 mW max. 20 mA @ 24 Vdc + sourcing current for NPN output 50 mA @ 24 Vdc for relay output – 1200 mW max. |
Current output | 4 mA to 20 mA (3-wire configuration) linear to temperature |
Max load on current output | (Vsupply-9V ) / 20 mA, ? |
Optional switching output | Transistor NPN (max 100 mA source ) or Transistor PNP (max 100 mA sink) or Relay SPDT 0.5A @ 240 Vac |
Optional switching logic | N.C. or N.O. software selectable |
Optional switching ranges | Customer programmable between -325 °F to 1,100 °F (-200 °C to 600 °C) |
Isolation | 500 Vdc input /output (between probe and output signal) |
Electrical connection | M12 x 1 (5-pin) or integral cable |
Hysteresis | 1% of range standard; customer programmable optional |
Accuracy | ±0.25% full scale (0.45 °F + 0.40% of reading) max.
with default calibration ±0.125% full scale (0.18 °F + 0.20% of reading) max. with one-point factory or customer calibration |
Open circuit detection | Upscale (22 mA) or downscale (2.5 mA) current
output. Error message on LED display |
Warm-up | 30 seconds |
Response time | 0.5 sec to 30 sec (software selectable) |
Display | 4-digit LED, decimal point selectable by software |
Display resolution | ±0.02% F.S. ±1 digit |
RFI effect | 1% or less typical |
Temperature ranges | Ambient -40 °F to 176 °F (-40 °C to 80
°C) Effect <0.01% FS/ °C Storage -58 °F to 185 °F (-50 °C to 85 °C) |
Environmental protection | NEMA 4/ IP 65 |
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