Touch-Pad
Standard
SD-Series
Push-Buttons
Optional
The SD-50X is the ultimate advancement in ease of use from the company that developed the worlds first 4-20 mA loop powered meters.
The SD-50X features lockable front panel scaling and calibration. Any 4 to 20 mA signal can be scaled from almost any two input values to display any required engineering unit of measure. A 4-20 mA input can display 50,000 counts of resolution from -19,999 to +30,000. The 6th digit can be selected to display F, C or an inactive extra zero from a dip switch at the rear of the case.
With less than a 4 V loop drop, this meter can be inserted in the
24 V input loop excitation provided by our Lynx, Leopard and Tiger meter families. The optional 4-20 mA outputs from these meters can power several SD-50X units as remote displays.
Two SD-50X meters can be mounted in a 96x96 DIN cutout and powered from the same loop, but display different scale readings such as F and C, lbs and kg or psi and Torr.
Easy scaling and high resolution also enables the SD-50X to be used as a precision counting scale, for nuts and bolts, barrels or boxes.
Typical Application Connections
Input
LOW
()
Input
HIGH
(+)
()
(+)
24V
Loop
Supply
The SD-50X has a matching DIN case style and panel appearance that is complementary to the Lynx, Leopard and Tiger family of meters, except the depth behind the panel is only 15 mm (0.59).
The SD-50X makes an ideal extra or remote display as it can operate either in conjunction with the 4-20 mA loop input or operate from the 4-20 mA analog output of most Leopard or Tiger meters.
1/8
Input Configuration:........Series connection to 4-20 mA DC current loop. 3.4 volts drop, plus 20 (equivalent to 3.9 V @ 20 mA)
Full Scale Ranges:..........Standard meter is adjustable to any
Display Span between a max negative reading of -19,999 and a max positive reading of 30,000, max resolution (50,000 counts), from any signal input span between 3.5 mA and 27.5 mA.
A/D Converter:.................16 Bit Sigma Delta Accuracy:.........................0.02% of reading plus 2 digits Temperature Coefficient: Typically 30 ppm/ C plus 0.1 counts/ C for zero offset.
Operating Temperature:..-10C to +50C Storage Temperature:......-20C to +70C Relative Humidity:...........95% (non-condensing) Case Dimensions:...........1/8 DIN, Bezel: 96x48 mm (3.78x1.89) Depth behind bezel 15 mm (0.59) plus 16.4 mm (0.65) for right-angled Connector
Weight:...............................56.7 gms (2 oz)
141.7 gms (5 oz) when packed
SD-35...........0.2 / 2 / 20 / 200 / Custom DC V ranges, 3.5 digit, 5 V DC Powered
SD-50X.........5 Digit 4-20 mA Loop Powered
September 8, 2003 SD-50X Data Sheet (SD02)
Texmate, Inc. Tel. (760) 598-9899 www.texmate.com
Page 1
UP ARROW
BUTTON
DOWN
ARROW
BUTTON
PROGRAM
BUTTON P
PROGRAM BUTTON: This button is used to move from one program step to the next. When pressed simultaneously with the UP ARROW button, the Programming Mode is entered.
UP ARROW BUTTON: Increases the value of the displayed parameter.
DOWN ARROW BUTTON: Decreases the value of the displayed parameter.
NOTE: When the display lock switch is on and any button is pressed, the display will show only [Lock] momentarily as shown above and then return to the normal operational display.
Two Point Digital Scaling and Calibration - Quick Reference Guide
Two Point Calibration and Scaling Example: 4 to 20 mA input to read 0 to 20,000
Step 1
Step 2
Step 6
Decimal Point Setting
Step 1
Step 2
Step 3
Step 4
Step 7
Step 3
Step 4
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Texmate, Inc. Tel. (760) 598-9899 www.texmate.com
The SD-50X is incredibly easy to use, and almost any engineering unit or desired display scale can be obtained from almost any input signal value within the following parameters.
entered. This feature is particularly useful when the available calibration signal cannot be adjusted between two known values without discontinuity.
Min/Max Input Signal Range and Compliance Voltage
The operational signal range of the meter is 4 to 20 mA. The minimum acceptable input signal is 3.5 mA. The maximum acceptable input signal is 27.5 mA.
The signal must have a compliance voltage of at least 4 V (200 load). For scaling and calibration the input signal should be capable of adjustment between two output values for which the required display value is precisely known.
Scaling can be accomplished with as little as 0.1 mA difference between high and low input signals. However, full scale accuracy is easier to achieve when there is at least a 4 mA difference between the high and low calibration points of the input signal.
Maximum Display Readings
The maximum positive reading that can be displayed is +30000.
The maximum negative reading is -19999. Therefore, the maximum viewable digital display span is 50000 counts. Any combination of input signal and scaling that causes the digital display span to exceed these limits produces a display of for over-range or for under-range.
Maximum Range of Input Values for Calibration
For calibration or scaling, the [Lo in] calibration mode is accessed first and the low input signal is applied first. Because reverse scalings are accepted, any display value between -19999 and +30000 may be entered. Likewise, when the [hi in] mode is accessed and the high signal is applied any desired display value between -19999 and +30000 may also be entered. However, the maximum difference between the two display values entered cannot exceed 32000 counts.
Calibration Error Display [cALErr]
If, after entering the calibration values, the difference between the high and low input signal is insufficient (less than 0.1 mA), or if the difference between the two display values exceeds 32000 counts, the meter displays [cALErr]. The calibration values entered are cancelled and the previously calibrated scale factor is retained in memory.
Loss of Input Signal Power During Calibration
If the input signal is disconnected, after the LOW input signal has been applied and the PROGRAM button pressed, the [Lo in] value will be retained. After the signal power is re-applied, the meter automatically returns to the calibration [hi in] mode. The HIGH input signal can then be applied and the [hi in] value
Spans From 32000 Up to the Max 50000 Counts of Display Require Proportional Scaling
There is a 32000 count maximum difference permitted between the [Lo in] and [hi in] display values that can be selected during calibration. In order to achieve display resolutions between
32000 and 50000 counts, it is necessary to scale and calibrate the meter at a lower input signal span than the span at which the meter is intended to be operated.
For Example:
An input of 4 to 20 mA is required to read -19999 to + 30000.
Signal Span = 16 mA and Display Span = 50000 counts.
To calibrate the meter in this example with a [Lo in] signal of 4 mA and a [hi in] signal of 20 mA, the difference between the low and high values required would be 50000 counts. This exceeds the 32000 count maximum difference by 18000 counts. Therefore, a lower input signal span should be used.
Proportional Scaling at 50% of Full Scale (High Side)
In the example, a signal change from 12 mA to 20 mA (8 mA = 50% of signal span) produces a display change from 5000 to
30000 (a 25000 count change). With a [Lo in] signal of 12 mA, the display value could be set to 5000, and with a [hi in] signal of 20 mA, the display value could be set to 30000. Result: a signal of 4 to 20 mA would read -19999 to +30000.
Proportional Scaling at 50% of Full Scale (Low Side)
Conversely, in the above example, a signal change from 4 mA to 12 mA (8 mA = 50% of signal span), would produce a display change from -19999 to +5000 (which is also a 25000 count change). Accordingly, the same scaling/calibration result could be achieved while remaining within the 32000 count maximum.
With a [Lo in] signal of 4 mA the display value could be set to -19999, and with a [hi in] signal of 12 mA the display value could be set to +5000. Result: the meter will then also be calibrated so that an input of 4 to 20 mA will display -19999 to +30000.
Proportional Scaling at 25% of Full Scale
Similarly, a signal change from 4 mA to 8 mA (4 mA = 25% of signal span) would produce a display change from -19999 to -
7500 (a 12500 count change is 25% of 50000). With a [Lo in] signal of 4 mA to -19999, and with a [hi in] signal of 8 mA the display value could be set to -7500. Result: the same scaling is also achieved, and an input of 4 to 20 mA will display -19000 to +30000.
the display value could be set
Texmate Produces Thousands
of Custom OEM Face Plates
Have Texmate Design and Build a Custom Face Plate to Suit your Next project!
Custom face plates have a nonrecurring artwork charge. A serial number is then assigned to each artwork, to facilitate reordering.
Small Run or One-Off custom face plates incur an installation charge, and are generally printed on a special plastic film, which is then laminated to custom faceplate blanks as required.
Large Run (250 pieces min): custom face plates are production silk screened, issued a part number, and held in stock for free installation as required by customer orders.
OEMs may also order Custom Meter Labels, Box Labels
Custom Data Sheets and Instruction Manuals.
S SD-50X Data Sheet (SD02)
Texmate, Inc. Tel. (760) 598-9899 www.texmate.com
Page 3
FRONT VIEW
1/8 DIN 96x48mm
SIDE VIEW
Panel
TOP VIEW
The clear lockable cover is designed to be dust and water proof to NEMA-4X, IP65 standards. The assembly consists of a base and cover with a cam hinge and key-lock fastening mechanism. An O-ring, or neoprene gasket forms a seal between the base and the panel. The cam hinge prevents the cover from closing when opened until pushed closed. The cover has a tapered recess that, when closed, forms a seal with a tapered spigot on the base. A key-lock employs a cam locking device to force the spigot into the recess, ensuring seal integrity. A safety catch keeps the cover closed even when the key is removed, and the keyhole can be used to attach a safety seal clip, preventing unauthorized opening.
Standard Options for this Model Number
Part Number
Description
List
SD-50X................DPM, 4 to 20 mA DC Loop Powered Touch-pad Faceplate
DISPLAY
STANDARD.........LCD, 5 Digit, 0.56 with selectable F,C or extra 0.N/C
Special Options and Accessories
SPECIAL OPTIONS (Specify Inputs or Outputs & Req. Reading)
CB-FS50.........Custom Scaling within the standard 4 to 20mA range......
To customize the front bezel, each SD-meter is supplied with a white printed clear adhesive label containing popular
descriptors. Choose the descriptors desired, peel off the adhesive backing and align the descriptors in the center right of the faceplate.
various
ACCESSORIES (Specify Serial # for Custom Artwork Installation)
Local Distributor Address:
450 State Place, Escondido, CA 92029 Tel: (760) 598-9899 Fax: (760) 598-9828 URL: www.texmate.com
Page 4
Texmate, Inc. Tel. (760) 598-9899 www.texmate.com
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.