Omega Engineering Super SMCJ-J Instruction Sheet

Super MCJ
SMCJ-J, SMCJ-K, SMCJ-T
INSTRUCTION
M2813-0103
SHEET
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GENERAL DESCRIPTION

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.

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)
Thermo-
couple
Input
(SMP or OST
Connectors)
Thermocouple-to-Analog
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 .
Press
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

OTHER IMPORTANT CONSIDERATIONS BEFORE OPERATION

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
Press
1 sec Delay
1 mV/°C Mode
Start
Sleep
Press
Mode
1 mV/°F Mode
Press
Figure 1, Functional Flow Chart
Accessories
Model No.
OM-NOMAD-BATT
SMCJ-CAB
°C
°F
Press
OFF
Low
Batt
Super MCJ
Thermocouple to
Analog connector
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.
CAUTION
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.
Output Upscale/Downscale
YES
Input NO
Open
Input NO
Open
YES
Output Upscale/Downscale
Description
Replacement Battery
Cable Wire (Red & Black) 36" Long
+
®
Analog
Output,
1 mV per
Output
degree
K
–
Connector
1 mV/°C Output
1 mV/°F Output
°C
°F
°C
°F
°C
°F
°C
°F