|
These
circuit boards are based on the Analog Devices AD595
Thermocouple Amplifier. The nice thing about this chip is
that it has on-board ice-point reference so there is no need
to compensate for it. The output for these boards is
approximately 10mV per degree C. For instance, if you are
measuring 15 degrees C, the output from this circuit will be
150 mV. –15 degrees C = -150 mV. If you use a DAC board
with this, it must be able to handle these voltages. These
boards use a Type J or K thermocouple (not included).
Please specify which type thermocouple you want to use
when ordering. There are
several designs that I offer depending on what your needs
are. They are as follows:
|
|
Version 1:
$20.50
Requires 5 to 15 VDC input. It will monitor temperatures
above 0 degrees Celsius (C) (32 degrees Fahrenheit (F)). Very simple board – only one chip and 3
connections. Note: Most DAC boards provide a 5VDC
output that can power this. Maximum
temperature measured at 5V is 500 C. Higher
temperatures require higher input voltages.
Output is 10 mV per degrees C.
|
|
|
Version 2:
$22.25
Requires 5VDC input (due to 5V
inverter). It will monitor
temperatures above AND below 0 degrees C. Has a
voltage inverter added that is required to monitor
temperatures below 0 degrees C. Maximum
temperature measured is 500 C. Output is +/-
10 mV /degrees C.
|
|
|
Version 3:
$24.25
Requires 7.5 – 32 VDC input. Same
specs as
Version 2 but now has the ability to operate at
higher input voltages if 5VDC is not available.
|
|
Version 4:
$80.00
Requires 7.5 – 32 VDC input. Same
specs as
Version 3 but this version can accommodate 4
thermocouples.
|
 |
EGT
Version:
$35.00
This board was designed for car
enthusiasts who wish to monitor the temperature of
their exhaust gas in order to fine tune their
engine’s performance. The design is based on the
Analog Devices AD595 (type K) Thermocouple Amplifier
and has additional circuitry to enable its use in
automotive applications.
Maximum output is
5V DC at 1000 degrees C (1832 F). This board is
intended to be used with a DAC device to handle
temperature conversion. Requires 12 to 24VDC
power.
Thermocouple is not
included. Two, 3 and 4-channel versions of
this board are available. Add $25.00 per
additional channel. Please order the 2, 3,
and 4-channel boards by emailing me with your
request.
|
|
CALIBRATION
SERVICE |
Calibration Service $15.00
For an
additional $15.00 per TC channel, I will provide a
up to a 10 point
calibration for the board that you order. You
can tell me what temperature range that you want.
I can go up to 1000 degrees C (1832 F). I will provide
you the voltage output at the temperatures that you
specify. This is not to be considered
calibration to a NBS Certified reference. This
will just get you much closer than if you were to
just do it yourself.
|
|
|
|
|
