PN 1886462 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
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
Accuracy:
±0.05% from 1 mA to 5.8 mA of excitation current
±(0.05% + from 0.09 to 1 mA of excitation current
Output resistance range: 0.00 to 400.00 Ohms
Allowable excitation current: 0.090 to 5.800mA continuous DC (See
Calibrating additional instruments on page one for calibrators
compatible with pulsed or intermittent excitation currents)
Measuring RTD sensors
Accuracy: ±0.05%
Excitation current supplied: 1 mA, nominal
Normal mode rejection: 50/60 Hz, 50 db
Common mode rejection: 50/60 Hz, 100 db
0.01 mV
mA Excitation Current
Resolution and accuracy
RTD Type
Alpha Range Accuracy Range Accuracy
Pt 100
Ω
(DIN/IEC/JIS 1989)
1.3850 -200.0 to 200.0°C
±0.5°C
-328.0 to 212.0°F
±0.9°F
200.0 to 700.0°C
±0.6°C
212.0 to 750.0°F
±1.0°F
700.0 to 850.0°C
±0.7°C
750.0 to 1200.0°F
±1.1°F
1200.0 to 1562.0°F
±1.2°F
Ohms
0.00 to 410.00
±0.2
Ω
Note:
Above ranges are for READ mode in which the Model 111 provides a 1 mA excitation current and for
SIMULATE mode into devices with less than 1.1 mA of excitation current. Simulating into devices with greater
than 1.1 mA the Model 111 resolution changes automaticaly to 1°F, 1°C or 0.1 Ohm.
The symbol Alpha (a) 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 or simply 385).
