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Texmate, Inc. www.texmate.com
TL-QUAD-LOOP & TL-DUAL-LOOP Transmitter Manual (d0108)
Case Dimensions
22.5mm
(0.89”)
128.7mm
(5”)
102.4mm
(4”)
99.7mm
(3.9”)
SIDE
22.5 mm
(0.89”)
TOP
WARRANTY
Texmate warrants that its products are free from defects in material and workmanship under
normal use and service for a period of one year from date of shipment. Texmate’s obligations
under this warranty are limited to replacement or repair, at its option, at its factory, of any of
the products which shall, within the applicable period after shipment, be returned to Texmate’s
facility, transportation charges pre-paid, and which are, after examination, disclosed to the sat-
isfaction of Texmate to be thus defective. The warranty shall not apply to any equipment which
shall have been repaired or altered, except by Texmate, or which shall have been subjected
to misuse, negligence, or accident. In no case shall Texmate’s liability exceed the original pur-
chase price. The aforementioned provisions do not extend the original warranty period of any
product which has been either repaired or replaced by Texmate.
USER’S RESPONSIBILITY
We are pleased to offer suggestions on the use of our various products either by way of printed
matter or through direct contact with our sales/application engineering staff� However, since
we have no control over the use of our products once they are shipped, NO WARRANTY
WHETHER OF MERCHANTABILITY, FITNESS FOR PURPOSE, OR OTHERWISE is made
beyond the repair, replacement, or refund of purchase price at the sole discretion of Texmate.
Users shall determine the suitability of the product for the intended application before using,
and the users assume all risk and liability whatsoever in connection therewith, regardless
of any of our suggestions or statements as to application or construction� In no event shall
Texmate’s liability, in law or otherwise, be in excess of the purchase price of the product.
Texmate cannot assume responsibility for any circuitry described. No circuit patent or software
licenses are implied. Texmate reserves the right to change circuitry, operating software, speci-
fications, and prices without notice at any time�
Output Signal Calibration
Copyright © 202-2021 Texmate Inc. All Right Reserved.
1934 Kellogg Ave� Carlsbad, CA 92008
Tel: 1-760-598-9899 • USA 1-800-839-6283 • That’s 1-800-TEXMATE
• Email: [email protected] • [email protected]
• Web: www.texmate.com
TL-dual-LOOP and TL-QUAD-LOOP Technical Manual Copyright © 2020-
2021 Texmate Inc. All rights reserved. Published by: Texmate Inc. USA.
Inormation in this Technical Manual is subject to change without notice due
to correction or enhancement. The information described in this manual is
proprietary to Texmate, Inc. and may not be copied, reproduced or transmit-
ted, in whole or in part, in connection with the design, manufacture, or sale
of apparatus, device or private label product without the express written
consent of Texmate, Inc.
Each output channel is normally calibrated by the factory.
You may recalibrate the output channels by following these direc-
tions. Each output channel is calibrated using the “Z” (ZERO)
and “S” (SPAN) potentiometers located on the front panel, L1 for
Channel 1, L2 for Channel 2, etc�
1� A calibrated input signal source is strongly recommended�
2� A calibrated 4-20mA measurement meter is strongly recom-
mended for the output�
3� Make sure the input signal type (current or voltage) and
range are correctly set. See INPUT SELECT above.
4� Make sure power is applied to the meter and the PWR LED
is lit�
5. The calibration process takes several iterations, so it is not
necessary to get to 4�00mA or 20�00mA on the first pass�
Rather, set the output progressively more accurately with
each iteration�
6� Apply the low value of the input signal range to the input
connector�
7. Adjust the ZERO potentiometer until a reading of 4.0mA is
observed at the output�
8� Set the input to the high value of the input signal range�
9. Adjust the “S” (SPAN) potentiometer until a reading 20.0mA is
observed at the output�
10� Repeat steps 6 through 9, targeting 4�00mA and 20�00mA,
until stable outputs are achieved. This typically takes 3-4 iter-
ations�
NOTE: Normally, the output is 4-20mA, but the
TL-LOOP-QUAD output can be adjusted to 0mA on the
low end of the range�
NOTE: The 4-20mA output is easily converted into a
voltage by adding a suitable resistor across the output
pins, e�g�, a 0�5% 1/4W 250 ohm metal film resistor,
although accuracy of the resulting voltage will be affect-
ed by the precision and tolerance of the resistor�
