Omega Products TX901 User Manual

Field Rangeable Miniature 2-Wire Transmitters

Isolated Models Available

Additional

TX900 Series

U Thermocouple, RTD and

Millivolt Input Models

U Compact Size U 4 to 20 mA Output U ±0.1% FS Accuracy

TX903 Isolated Model

(Other Models Non-Isolated)

U Mounts in Protection Head

TX900 Series transmitters feature dip switch selection of input type and range. The following models are available: TX901 (non-isolated, accepts J, K, T, E, R or S thermocouples); TX903 (isolated, accepts J, K, T, E, R or S thermocouples; TX904 (non-isolated, accepts 100 Ω Pt RTD’s 2- or 3- wire); TX905 (non-isolated, millivolt input). To scale the units in the ﬁeld, calibration equipment is required.

Speciﬁcations

Inputs: See input types and ranges

table below right

Output Range: 4 to 20 mA dc Zero Adjustment: ±25% mV span

centered around 0 mV (or °C) RTD models ±40°F Accuracy: ±0.1% FS (includes effects of linearity, hysteresis and repeatability)

Frequency Response: 3 dB @ 3 Hz Ambient Temperature Range:

-25 to 85°C (-13 to 185°F) Storage Temperature Range:

-65 to 125°C (-85 to 257°F) Supply Voltage: 9 to 35 Vdc; 24 Vdc recommended

Max Loop Vs – 8.5V Resistance: 0.020 Isolation (TX903 only): 500V RMS Dimensions:

TX901, TX904: 1.90 H x 4.45 cm D

(1.75 x 0.75") TX903, TX905, TX906:

2.9 H x 4.45 cm D (1.13 x 1.75") (height includes barrier strip) Weight: 30 g (1 oz); 71 g (2.5 oz) for thermocouple models

power supplies

available,

visit omega.com

for details

Input Types and Ranges

Input Type

TX901/903 0 to 760°C (0 to 1390°F) TX901/903 TX901/903 0 to 400°C (0 to 750°F) TX901/903 0 to 835°C (0 to 1515°F) TX901/903 TX901/903 TX904-1 0 to 260°C (0 to 500°F) TX904-2 mVTX905 4 to 64 mV VTX906-V1 0.04 to 0.64V

VTX906-V2 0.4 to 6.4V VTX906-V2 4 to 64V

†

Note: Factory setting; TX901 Type J 0-500°F, TX903 Type J 0 to 500°F, TX904-1

0 to 300°F, TX904-2 0 to 500°F, TX905 0 to 50 mV.

To Order Visit omega.com/tx900 for Pricing and Details

Model No. Description

TX901 J, K, T, E, R, S thermocouple input, non-isolated TX903 J, K, T, E, R, S thermocouple input, isolated TX904-1 100 Ω Pt RTD input (a = 0.00385), non-isolated TX904-2 100 Ω Pt RTD input (a = 0.00385), non-isolated TX905 Millivolt input, 4 to 64 mV non-isolated TX906-V1 Volt input, 0.04 to 0.64V non-isolated TX906-V2 Volt input, 0.4 to 6.4V non-isolated TX906-V3 Volt input, 4 to 64V non-isolated NB1TX901-(*) NB1 thermocouple probe, 30.5 cm (12") L, 1⁄4" OD,

NB1TX903-(*) NB1 thermocouple probe, 30.5 cm (12") L, 1⁄4" OD,

PRTX904-1 PR-12 RTD probe, 30.5 cm (12") L, 1⁄4" OD,

PRTX904-2 PR-12 RTD probe, 30.5 cm (12") L, 1⁄4" OD,

TX-SCALED Scaling charge for factory set up of range

(specify input type and range from chart above)

Insert thermocouple type J, K, T or E. Contact our custom engineering department for pricing on R or

S thermocouples, which are available by special order. Comes complete with operator’s manual. Notes: (1) Thermocouple model output proportional to mV output of thermocouple. Not linearized

to temperature.(2) For non-isolated units use ungrounded probes. Thermocouple or RTD input simulation required to scale output for a particular range. To order unit scaled by OMEGA specify input type, low end of range, high end of range and °F or °C. Specify: TX-SCALED.

Ordering Example: TX901, non-isolated thermocouple transmitter.

and Model No. Overall Input Range

Shown

actual size.

0 to 1370°C (0 to 2500°F)

0 to 1700°C (0 to 3100°F) 0 to 1760°C (0 to 3210°F

0 to 538°C (0 to 1000°F)

ungrounded junction, 304 SS sheath, with TX901 transmitter

ungrounded, 304 SS sheath, with TX903 transmitter

304 SS sheath, with TX904-1 transmitter

304 SS sheath, with TX904-2 transmitter

N-42

Transmitter

inside!

30.5 cm

(12”) probe

shown with

optional

NB3 head.

)