PN 1886481 Rev A April 2002
©2002 Altek Industries, Inc. Specifications subject to change without notice.
All rights reserved. Printed in U.S.A.
Altek products are warranted to be free from defects
in material and workmanship (excluding fuses,
batteries and leads) for a period of three years from
the date of shipment. Warranty repairs can be
obtained by returning the equipment prepaid to our
factory. Products will be replaced, repaired, or
adjusted at our option. Altek gives no other
warranties, including any implied warranty of fitness
for a particular purpose. Also, Altek shall not be liable
for any special, indirect, incidental or consequential
damages or losses arising from the sale or use of its
products.
Warranty
(Unless otherwise Indicated, specifications are in % of 400 Ohm
Span at 1.0 mA excitation current @ 23° C)
General
Accuracy: ±0.025%; ±0.013% typical
Temperature drift: ±0.01 %/°C
Operating temperature range: -5 to +140° F (-20 to +60° C)
Storage temperature range: -22 to +175° F (-30 to +80° C)
Relative humidity: 10 to 90%, non-condensing
Warm up time: 30 seconds to maximum accuracy
Overload protection: Electronically protected to 40 VDC between
leads 1 & 2, fuse protected to 125 VAC, 5A between leads 2 & 3
Battery life: 9 Volt Alkaline: 50 hours
Low battery: “BAT” indication on LCD at 7 Volts nominal, approxi-
mately 10 hours left
Overall size: 2 1/2 x 2 5/8 x 5 1/8 inches (63.5 x 66.7 x 130 mm)
Leads: Approximately 18" (0.46m) terminated with spade lugs
Weight: 11.5 oz. (0.33 kg)
Carrying case: Included, zippered with belt loop
Specifications
Simulate RTD or resistance
Output resistance range: 0.00 to 2010.0 Ohms
Allowable external excitation current: 0.090 to 5.800mA, DC
Intermittent excitation current mode: Accepts intermittent excitation
currents with minimum 125 msec fixed current at minimum
repetition rate of 1/sec from 0.090 to 5.800mA
Measuring RTD sensors
Excitation current supplied: 1 mA, nominal
Normal mode rejection: 50/60 Hz, 50 db
Common mode rejection: 50/60 Hz, 100 db
Types, ranges, resolution and accuracy
Degrees C Degrees F
Typical Typical
RTD type Alpha Range Accuracy Range Accuracy
Pt 100 (DIN/IEC/JIS 1989) 1.3850 -200.0 to 850.0° ±0.15° -328.0 to 1562.0° ±0.25°
Pt 100 (Old JIS 1981) 1.3916 -200.0 to 648.9 0.15 -328.0 to 1200.0 0.25
Pt 100 (Burns) 1.3902 -195.6 to 648.9 0.15 -320.0 to 1200.0 0.25
Pt 100 (US Lab) 1.3926 -200.0 to 862.0 0.15 -328.0 to 1584.0 0.25
Pt 1000 (HVAC)* 1.3750 -184 to 275 0.10 -300 to 527 0.15
Cu 10 (Minco)* 1.4274 -200 to 260 1.10 -328 to 500 2.00
Ni 120 (Pure) 1.6720 -80.0 to 273.0 0.10 -112.0 to 524.0 0.15
273 to 316 0.10 524 to 600 0.15
Ni 110 (Bristol 7 NA) 1.5801 -106.7 to 315.6 0.10 -160.0 to 600.0 0.20
0.00Ω to 410.00Ω ±0.10Ω ±0.05Ω
0.0Ω to 2010.0Ω ±0.50Ω ±0.25Ω
Accuracy Typical accuracy
OHMs
*These ranges have fixed 1° resolution
Note: Above ranges are for READ mode in which the Model 211
provides a 1 mA excitation current. SIMULATE mode operates in
these ranges with external excitation currents between 0.090 and
1.1 mA. Resolution will be 1°, or 0.10Ω, in all ranges for excitation
currents between 1.1 and 5.8mA
1000Ω RTDs: The maximum excitation current to source the full
range of the Pt 1000 1.375 is 1 mA. Currents exceeding 1 mA will
lower the maximum temperature.
The symbol Alpha (α) is used to identify the particular RTD curve.
The value is derived by dividing the resistance of the sensor at
100°C by the resistance at 0°C (a = R100°C/R0°C). For Pt 100
DIN/IEC/JIS this is 138.50/100.00 = 1.3850 (which is also shown as
0.00385).
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