0.56 Red LED Display Optional Blue or Green Display
General Features
Specifications
The SM-Series meters have LCD or LED dis plays and offer many unique features designed to simplify installation, cal i bration and scaling. SM-35-DCV and SM-35X-DCV meters are pin-com pat ible, which enables LED and LCD meters to be interchanged within the same panel without necessitating wiring or panel cutout changes.
All SM-Series meters are powered with bipolar single-ended in puts with optional differential measurement. The meters feature Display Hold, Display Test and Auto-Polarity indication.
The SM-series of meters are designed to be user scalable to almost any en gi neer ing unit of readout. On-site scaling and recalibration is fa cili tated by multi-turn po ten ti ome ters that provide continuous ad just ment within each of the six header-program mable full scale ranges.
The five ranges provided with the SM-35-DCV (LED display) and SM-35X-DCV (LCD display) are 50mV, 100mV current shunt, 2V, 20V and 200V DC full scale. 5V power isolator, 1000V DC range, 4-20mA and Differential Measurement are factory installed options only.
Both SM-35-DCV and SM-35X-DCV have Zero-offset and Span ad just ment po ten ti ome ters as a standard fea ture.
Input Configuration:.......Single-ended, with optional differential measurement and provision to offset the zero of the reading displayed
Input Impedance:............1M minimum
Full Scale Ranges:.........2VDC (Meters shipped with 2V range selected) 20VDC, 200VDC, 50mVDC and 100mVDC ranges are header programmable.
A/D Converter:................12 Bit Dual Slope
Accuracy:........................(0.05% of reading + 2 digits)
Temperature Coefficient: 100ppm/C typical
Warmup Time:.................One minute to speci fied accuracy
Conversion Rate:.............3 readings per second
Display:.............................0.56" High efficiency LED's "Display Hold"
feature
Decimal Selection:..........User programmable to 3 positions
Over-range Indication:...When input exceeds full scale on any range being used, most significant "1" digit and polarity symbol are displayed with all other digits blank
4 to 20mA Process Loop Connection
Power Supply:.................+4.5 to +5.5V DC at 150mA;
Optional 1.5kV 5V Isolation
Fully User Scalable
HOLD
Common
TEST
GND
24V
External
Loop Supply
Direction
Current
Operating Temperature:.. 0 C to +60 C
Storage Temperature:.....-20 to +70 C
Relative Humidity:...........95% (non-condensing)
Weight:.............................88 gms (3.1 oz)
143 gms (5 oz) when packed
Other devices can be added to the loop.
SM-35X-DCV...... 3.5 digit LCD with back light, 5VDC Powered input ranges: 50mV/100mV/2/20/200/1000VDC
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To open meter, insert a flat head screwdriver or similar instrument in both slots on the side of the cover and pry open.
Minus Sign
Display Header
Optional 1.5kV
5V Isolation
Input Range
Select Header
2V is factory
pre-installed
Span
zero
Decimal Point
selection
1) Select the DC Volt input range 20V, for example, by re-positioning the jumper clip on the range select headers indicated by and marked on the PCB Range select Header, shown on Component Layout section.
2) Input 0VDC, meter will automatically will display 000 or
adjust Zero pot until meter display 000.
3) Apply at least 95% of full voltage range, eg 19V for a 20
DCVolt range.
4) Adjust Span pot until meter displays 19.00 (20V Range). For other ranges, the voltage applied should be similarly proportional to the particular full-scale voltage.
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In single-ended
mode, input Lo
and GND are
internally connected.
In differential
mode, input Lo
and GND are
disconnected
Hold will freeze the reading when connected to Gnd, reading will update when disconnected.
Display test will light up all digits 1888 when
connected to Gnd and will go back to normal display when disconnected
Move the
jumper to
the indicated
position on the
header for the
required
decimal
ZERO Potentiometer (Pot)
The ZERO pot is to the right of the SPAN pots (as viewed from the back of the meter).
Typically it enables the displayed reading to be offset 1000 counts. Not available on differential option
SPAN Potentiometer (Pot)
The SPAN pot is on the right side of the signal input. Typical adjustment is 100% of the input signal range.
RANGE SELECT Header
Range values are marked on the PCB. six positions are provided. After selecting a new range with the single jumper clip, recalibration is required.
Minus Sign Header
Activates Minus sign
on display
This header allows the Minus Sign to work normally.
Disable Minus sign
on display*
*Note: Removing the header disables Minus Sign
Connectors
This meter uses plug-in type screw terminal connectors for all input and output connections. The power supply connections have a unique plug and socket outline to prevent cross connection. The main board uses standard right-angled connectors.
PANEL CUTOUT
FRONT VIEW
SIDE VIEW
TOP VIEW
option metal
screw mounting clip
When extra panel mounting tightness is required, optional Screw Mounting Clips can be purchased seperately and attach to the sliding mounting side clips
Ordering Information
Part Number
Description
SM-35-DCV........ 3.5 digit Red LED, 50mV/100mV/2v/20V/200V,optional 1000V, 4-20mA, 5V Isolator and differential measurement. 5VDC Powered
DISPLAY
STANDARD......... Red LED, 0.96 inch high SM-GREEN... Green LEDs SM-BLUE.... Blue LEDs
SPECIAL OPTIONS (Specify Inputs & Req. Reading)
V0-ISO5V..... 5V isolator-1.5kV isolaton between signal and power ZZ-SM35-DIFF. Differential Measurement ZR-SM35-50M.. Range change 0 to 50mV DC. Display scaling 100.0 ZR-SM35-100M. Range change 0 to 100mV DC. Display scaling 100.0 ZR-SM35-4-20.. Range change 4 to 20mV DC. Display scaling 100.0 ZR-SM35-20V.. Range change 0 to 20V DC. Display scaling 1999 ZR-SM35-200V Range change 0 to 200V DC. Display scaling 1999 ZR-SM35-1KV.. Range change 0 to 1000V DC. Display scaling 1000 ZS........... Custom digital display scaling within standard ranges
ACCESSORIES
SL.CASERED.. Slim Bezel Case, Red Faceplate w/Mtg Hrdwre PS-505....... 5V DC Regulated Power Supply, 0.5A Output PS-510....... 5V DC Regulated Power Supply, 1A Output
1934 Kellogg Ave., Carlsbad, CA 92008
Tel: 1-760-598-9899 1-800-TEXMATE Email: [email protected]
Tech Support: [email protected]
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AM-20........... 20 segment LED bargraph, 5V DC power
CM-35XTL...... Less than 1V DC loop drop and 1 Joule energy storage CM-35XT....... Economical 4-20mA loop-powered meter
PM-45X......... 4.5 digit 0.48 LCD DPM PM-45L......... 4.5 digit 0.4 LED DPM
SP-35X.......... Signal Power DC voltage measurement from 5.0V DC to 199.9V DC
PS-505....... 5V DC Regulated Power Supply, 0.5A Output
PS-510....... 5V DC Regulated Power Supply, 1A Output
Texmate is an American manufacturer of high durability industrial grade panel meters, bar graphs, and transducers. Texmate's meters are frequently equipped with relays and various signal outputs for industrial automation applications and are known for their extremely long service life.