Model 211 Specifications

Input specifications

Sensor typeSensor temperature coefficient Input range Excitation current Display resolution Measurement resolution Electronic accuracy Instrument temperature coefficient
Silicon diodenegative0 V to 2.5 V 10 µA ±0.05%8 100 µV20 µV±200 µV ±0.01% of rdg±10 µV ±5 PPM of rdg/°C
GaAlAs diodenegative0 V to 7.5 V10 µA ±0.05%8 100 µV20 µV±350 µV ±0.02% of rdg±20 µV ±5 PPM of rdg/°C
100 Ω platinum RTD,
250 Ω full scale
positive0 Ω to 250 Ω1 mA ±0.3%910 mΩ2 mΩ±0.06 Ω ±0.02% of rdg±0.2 mΩ ±5 PPM of rdg/°C
100 Ω platinum RTD,
500 Ω full scale
positive0 Ω to 500 Ω1 mA ±0.3%910 mΩ2 mΩ±0.06 Ω ±0.02% of rdg±0.2 mΩ ±5 PPM of rdg/°C
1000 Ω platinum RTDpositive0 Ω to 5000 Ω1 mA ±0.3%9100 mΩ20 mΩ±0.4 Ω ±0.04% of rdg±2.0 mΩ ±5 PPM of rdg/°C
Cernox® RTDnegative0 Ω to 7500 Ω10 µA ±0.05%8100 mΩ50 mΩ±0.8 Ω ±0.04% of rdg±20 mΩ ±15 PPM of rdg/°C

8 Current source error has negligible effect on measurement accuracy
9 Current source error is removed during calibration


Number of inputs1
Input configurationInputs can be configured from the front panel to accept any of the supported input types
IsolationMeasurement is not isolated from chassis ground
A/D resolution 24-bit
Input accuracySensor dependent—refer to Input Specifications table
Measurement resolutionSensor dependent—refer to Input Specifications table
Maximum update rate7 rdg/s
User curveOne 200-point CalCurve™ or user curve in non-volatile memory

Sensor input configuration

Measurement type 4-lead differential
ExcitationConstant current
Supported sensors Diodes: Silicon, GaAlAs RTDs: 100 Ω Platinum, 1000 Ω Platinum, Carbon-Glass, Cernox®, and Rox™
Standard curves DT-470, DT-670, CTI-C, PT-100, and PT-1000
Input connector Shared 25-pin D-sub

Front panel

Display5-digit LED
Number of reading displays 1
Display Units K, ºC, ºF, V, and Ω
Reading source Temperature and sensor units
Display update rate 2 rdg/s
Temp display resolution 0.001º from 0º to 99.999º, 0.01º from 100º to 999.99º, 0.1º above 1000º
Sensor units display resolution Sensor dependent, to 5 digits
Display annunciators K, °C, °F, V/Ω
Keypad4 full travel keys, numeric and specific functions
Front panel features Display brightness control, keypad lock-out


Serial interface

Electrical format RS-232C
Max baud rate 9600 baud
Connector9-pin D-sub
Reading rate Up to 7 rdg/s
Software support LabVIEW™ driver


Number2, high and low
Data source Temperature
SettingsHigh setpoint, Low setpoint, Dead band, Latching or Non-latching
ActuatorsDisplay message, relays


ContactsNormally open (NO), normally closed (NC), and common (C)
Contact rating 30 VDC at 1 A
OperationActivate relays on high or low input alarm or manual
ConnectorShared 25-pin D-sub

Analog output

IsolationOutput is not isolated from chassis ground
Update rate 7 rdg/s
Data source Temperature

Range0 V to 10 V 4 mA to 20 mA
Accuracy±1.25 mV ±5.0 µA
Resolution0.3 mV 0.6 µV
Min load resistance500 Ω NA
Compliance voltage NA10 V
Load regulation NA±0.02% of reading 0 to 500 Ω

 TemperatureSensor units (fixed by type)
Scales:0 K to 20 K Diodes: 1 V = 1 V
 0 K to 100 K100 Ω platinum: 1 V = 100 Ω
 0 K to 200 K1000 Ω platinum: 1 V = 1000 Ω
 0 K to 325 KNTC resistor: 1 V = 1000 Ω
 0 K to 475 K 
 0 K to 1000 K 

SettingsVoltage or current, scale
Connector Shared 25-pin D-sub


Ambient temperature range 15 °C to 35 °C at rated accuracy, 10 ºC to 40 ºC at reduced accuracy
Power requirementsRegulated +5 VDC at 400 mA
Size 96 mm W × 48 mm H × 166 mm D (3.8 in × 1.9 in × 6.5 in)
MountingPanel mount into 91 mm W × 44 mm H (3.6 in × 1.7 in) cutout
Weight 0.45 kg (1 lb)
ApprovalsCE mark, RoHS

Power supply (109-132)

Power requirements100 to 240 VAC, 50 or 60 Hz, 0.3 A max
Output +5 V at 1.5 A
Size40.5 mm W × 30 mm H × 64 mm D (1.6 in × 1.2 in × 2.5 in)
Weight 0.15 kg (0.33 lb)

2111 Single 1/4 DIN panel-mount adapter

2112 Dual 1/4 DIN panel-mount adapter

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