PM-Series
General Features
The PM-35XAC is a precision AC powered panel meter that mea sures true dif fer en tial and single-ended DC voltages over five user pro gram ma ble ranges from 199.9mV to 1200V full scale. The 1500V isolation provided by the internally mounted miniature 110 or 220VAC mains transformer eliminates most of the trou ble some ground loop problems associated with DC powered DPM's. Alternatively, where appropriate, a DC power supply of 9 to 15VDC can be used. Since the meter draws only a small constant current, operation from higher DC voltages is also possible merely by use of a voltage dropping resistor in series with the meter.
The true differential capability of the Model PM-35XAC permits accurate mea sure ments of very small input signals in presence of much larger common mode signals. It is ideal for measuring various balanced trans duc ers and bridge inputs.
The high contrast long-life liquid crystal display also offers 8 user pro gram ma ble de scrip tors for direct indication of the type and range of signals being mea sured.
Typical Application Connections
SINGLE-ENDED METER - 200mV RANGE, >2V RANGE For 200mV Range: 1) Omit R1 and R2; 2) Change R6 from 470k to 47k; 3) Change R8 from 619 to 121; 4) Change R9 from 4.32k to 12.1k; 5) Change C4 from 0.047F to 0.33F; 6)Change C7 from 0.1F to 2.2F. For>2V RANGE; 1) Install R1 and R2 as specified under section titled Use ful Tables.
Specifications
Input Configuration:......True differential and single-ended Full Scale Ranges:........199.9mVDC
1.999VDC (standard)
19.99VDC
199.9VDC
1200VDC
Input Impedance:...........Exceeds 1000M on 200mV and
2V ranges; 10M on all other ranges
Input Protection:............500VDC or 350VAC maximum on
200mV and 2V ranges; 1200VDC
or 850VAC on all other ranges Accuracy:.......................(0.05% of reading + 1 digit) Temperature Coefficient:..5PPM/C in ratiometric operation; 50
PPM/C Typ. using internal reference on 200mV and 2V ranges
Warm Up Time:..............10 seconds to specified accuracy Conversion Rate:...........3 readings per second nominal; user programmable from 1 to 10 readings per second
Display:...........................0.48" LCD
Decimal Selection:........User programmable to 3 positions Overrange Indication:...When input exceeds full scale on
any range being used, most significant 1 digit & polarity symbol are displayed with all other digits blank
Power Requirements:...110VAC or 220VAC, 5% at 50Hz, 117V or 230VAC, 5% at 60Hz and 400Hz. Regulated 9VDC to 15VDC at 6mA to 15mA
Operating Temperature:....0 to +60C Storage Temperature:...-20 to +70C Relative Humidity..........95% (non-condensing) Case Dimensions:.........Bezel 2.76 x 1.17 (69.75 x 29.7mm) Depth behind Bezel 3.32(84mm) plus 0.68 (17.27mm) for connector.
Weight:.............................88 gms (3.1 oz)
View more application connections and connection instructions on page 3.
PM-35A...................3.5 digit Red LED, Precision Preference, 2VDC, 5VDC Power PM-35U...................3.5 digit Red LED, Low Cost, 2VDC, 5VDC Power PM-35X...................3.5 digit LCD, Low Power Consumption 2VDC, 5VDC Power PM-35XAC110........3.5 digit LCD, 2VDC, 120VAC Power PM-35XACAR1.......3.5 digit LCD, Autoranging, 120VAC Power
PM-45L...................4.5 digit Red LED, Precision Meter w/Differential Input PM-45LU.................4.5 digit Red LED, Low Cost Meter w/Differential Input PM-45X...................4.5 digit LCD, Precision Meter w/Differential Input PM-45XU................3.5 digit LCD, Low Cost Meter w/Differential Input
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Connector Pinouts
The Texmate Model PM-35XAC interconnects by means of a standard PC board edge connector having two rows of 15 pins each, spaced on 0.1" centers. Connectors are available from Texmate, or form almost any connector manufacturer.
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Component Layout
R11
Calibration Procedure
After making the appropriate connections as shown in the instructions apply power to the meter. Then, with a precision DC reference source, apply +1.900VDC between Signal High Input Pin B4 and Signal low Input Pin A2. Adjust R10 potentiometer (on left side as viewed form rear) until the display reads +1.900V. NOTE: This calibration voltage is for a 1.999V F.S. meter. For other ranges, the voltage applied should be similarly proportionate to the selected full scale voltage.
SPAN Potentiometer (Pot)
The SPAN pot is on the right side of the display. Typical adjustment is 20% of the input signal range.
Typical Application Connections
The PM-35XAC may be used in a wide variety of configurations. The following circuits illustrate some of the possibilities and demonstrate the exceptional versatility of Texmate products.
Components called for in the applications which are not part of the standard meter may be supplied by the user or in some cases purchased from Texmate. The circuit diagrams explain the basic pinout connections required for each application. Unless otherwise specified, the diagrams will show the component values and solder junctions that would normally be installed on a standard 2V range meter. For those applications which have alternative ranges and/or input configurations, the required component values and any modifications are described in the text.
ZERO Potentiometer (Pot) optional
The ZERO pot is on the right side of the SPAN Pot. Typically it enables the displayed reading to be offset 500 counts.
NOTE: Use of these application circuits is entirely at the risk and responsibility of the user and any user modification of the meter may at the discretion of Texmate, void the warranty. (See rear page for user's responsibility and warranty details) The following legend applies to all application circuits: 1) optional component positions are shown in dotted lines; 2) internal solder junctions are shown by for a closed junction or for an open junction; 3) calibration voltages as measured by an external user supplied voltmeter are shown by
BATTERY OPERATED 4 TO 20mA RECEIVER 1) Install 125 resistor in RS position; 2) Install R15 potentiometer using any value between a minimum of 20k and a maximum of 100k.
VOLTAGE RANGE CHANGE
F.S. In R1
200mV omit
omit 2V
9M 20V
10M 200V
10M 1200V
R2 Resolution
omit
omit
100k
10k
100V
1mV
10mV
100mV
CURRENT RANGE CHANGE (*) Use 200mV F.S. meter for minimum voltage drop.
F.S. In
20A
F.S. In
200mA
20mA
2mA
200A
Rs External
0.01
0.1
Rs Internal
100
Resolution
10mA
1mA
Resolution
100A
10A
1A
100nA
Pic. A1
Optional Auto
Range Function
OHMMETER RANGE CHANGE
100m
100
10k
100
10k
100k
10M
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PANEL CUTOUT
FRONT VIEW
SIDE VIEW
TOP VIEW
When extra panel mounting tightness is required, optional Screw Mounting Clips can be purchased seperately and attach to the sliding mounting side clips
option metal
screw mounting clip
Standard Options for this Model Number 4BASIC MODEL NUMBER
PM-35XAC110 3.5 digit LCD, 2VDC, 120VAC Power...........
Special Options and Accessories 4SPECIAL OPTIONS (Specify Inputs & Req. Reading) ZS..........Custom display scaling within standard ranges ZR-1200V....1200 VDC Range Change.
ZR-200V....200 VDC Range Change.
ZR-20V......20 VDC Range Change.
ZRS-200MV..200 mVDC range change.
ZRS-PMRP...Non-standard range and scale - 3.5 digit.
PM-35XACAR1. Autoranging Function std.200mV/2V
4ACCESSORIES
CN-S15......Dual Row 15 Pin Edge Connector, Solder Type
1934 Kellogg Ave. Carlsbad, CA 92008 Tel: 1-760-598-9899 USA 1-800-839-6283 Thats 1-800-TEXMATE
Email: [email protected] [email protected]
Web: www.texmate.com
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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.