Super MCJ
SMCJ-J, SMCJ-K, SMCJ-T
INSTRUCTION
SHEET
M2813-0103
Thermocouple-to-Analog
Connector
This is a Thermocouple to Analog Connector.
It converts a thermocouple input signal (Type
J, K, or T) to a linear, compensated, amplified
analog output. The unit provides 1mV/°F or
1mV/°C analog output. The analog output
can go to a strip chart recorder or a digital
voltmeter for temperature monitoring.
The unit is powered by a single AA size
lithium battery. In order to install the battery,
remove the back cover and place the battery
on the PC board. The battery polarity is
indicated on the PC board. If the battery is
installed reverse, the unit will not power up.
The back cover is mounted to the front cover
via two mounting holes.
The input connection can be SMP or OST
type connections. The output connection is
standard banana plug or jack. The plastic
case and the rubber gasket Bumper Band
®
provides a rugged and sealed connector
design. Figure 1 provides a functional flow
chart of how the unit operates. This unit is
operated using a single tactile feedback
button .
There are 3 LEDs built into the connector.
The °C green LED flashes once every 2
seconds when the output provides 1mV/°C.
The °F green LED flashes once every 2
seconds when the output provides 1mV/°F. If
the input is open the °C and °F green LEDs
both flash alternately once a second.
When the battery voltage drops below a
certain level, a red LED starts to flash once a
second. This is a low battery indication. The
battery must be replaced with a fresh battery
immediately.
Field Adjustments
The unit is field adjustable by removing the
back cover and accessing the three
potentiometers. R17 provides offset
adjustment when the unit is in mV/°F mode.
R42 provides offset adjustment when the unit
is in mV/°C mode. R32 provides span (gain)
adjustment either in mV/°F or mV/°C mode.
Press
SPECIFICATIONS
Measuring Temperature Range:
Type J: -100 to +750°C (-148 to +1382°F)
Type K: -100 to +1250°C (-148 to +2282°F)
Type T: -100 to +350°C (-148 to +662°F)
Accuracy @ 75°F ambient
temperature across the range:
Type J: ± 1.4°C (± 2.5°F)
Type K: ± 3°C (± 5°F)
Type T: ± 2°C (± 3°F)
Input Connection:
SMP or OST connector
Input Impedance:
3M-ohms
Output Connection:
Standard Banana
Plug or Jack
Thermocouple Break Protection:
Output goes Upscale (std.)
°F & °C Green LEDs flash once a second
Output:
1mV/°F or 1mV/°C, °F or °C Green
LEDs flash once every 2 seconds
Output Load:
1K-Ohms min.
Power:
One AA size Lithium Battery, 3.4 to
3.6 VDC 1900 mAH
Battery Life @ 75°F Ambient Temperature:
1440 hours (60 Days), continuous, no load
Low Battery Indication:
Red LED flashes once a second,
Response Time:
(0 to 63% of Final value): 150 msec
Operating Temperature:
0 to 50°C (32 to 122°F)
Thermal Zero Drift:
0.05 mV/°C
(0.05 mV/°F) ambient temperature change
Operating Relative Humidity:
95% or
less, without condensation
Dimensions:
4"L x 2"W x 1"H (10L x 5W x 2.5H cm)
Weight:
2.4 oz (67g)
Press
Press
1 mV/°C Mode
1 sec Delay
1 mV/°F Mode
Input
Open
Input
Open
Output Upscale/Downscale
Output Upscale/Downscale
Figure 1, Functional Flow Chart
°C
°F
°C
°F
°C
°F
°C
°F
YES
YES
NO
NO
1 mV/°C Output
1 mV/°F Output
Start
Sleep
Mode
Press
+
–
Analog
Output,
1 mV per
degree
Thermo-
couple
Input
(SMP or OST
Connectors)
®
°C
°F
OFF
Press
Super MCJ
K
Output
Low
Batt
Thermocouple to
Analog connector
Model No.
Description
OM-NOMAD-BATT
Replacement Battery
SMCJ-CAB
Cable Wire (Red & Black) 36" Long
Accessories
GENERAL DESCRIPTION
Follow all the safety precautions and
operating instructions outlined in the manual.
The installation category is one (1).
There are no user replaceable fuse in
this product.
Maximum input voltage to earth: 30
Vrms (42.4 peak) or 60 Vdc.
Avoid contact with hazardous live parts.
The thermocouple probe should not be
connected to hazardous live voltages (less than
max. input voltage to earth).
The output terminals of this product are
for use with equipment (digital multimeter,
chart recorder, etc.) which have no accessible
live parts. Such equipment should comply with
all the applicable safety requirements.
Do not open batteries, dispose of in fire,
heat above 100°C (212°F), expose contents to
water, recharge, put in backwards, mix with
used or other battery types. It may cause
explosion, leakage or personal injury.
Use cloth damped with warm water and
soap to clean the outside case and label. Do
not use flammable liquid solutions for cleaning.
Do not immerse the product in water.
OTHER IMPORTANT CONSIDERATIONS BEFORE OPERATION
CAUTION
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