digital panel meters user guide DPM8180-2 Process Meter features CE approved and marked Large (14.2mm) red LED characters Choice of inputs (4-20mA, 10-50mA, 1-5V, 0-10V) Engineering read-outs e.g. pressure, flow, level Offset and span adjustable Adjustable sensor excitation output (5-24V dc) Display hold facility meters RPM anders DPM8000 series The DPM8180 is a low cost, high performance mains powered signal process panel meter. Engineering units such as pressure, flow, temperature and level can be displayed. It has an adjustable, 5-24V dc (50mA) excitation supply for ELECTRICAL SPECIFICATION powering transmitters and active transducers without the need Range 4-20mA 10-50mA 1-5V 0-10V for an external supply. Input impedance 10 Ohms 10 Ohms 1 MOhm 1 MOhm User calibration is performed by adjusting DIP switches and Maximum input 200mA 200mA 100V 100V multi-turn potentiometers to choose the input format and set . the corresponding display values OPERATING SPECIFICATION TERMINAL DEFINITIONS Line voltage 115/230V +10%, -20% TERMINAL SYMBOL DESCRIPTION Line frequency 50/60 Hz 1 IN HI Sensor input signal high Accuracy +/- 0.1% of reading +/- 1 digit 2 IN LO Sensor input signal low Temperature coefficient 100 PPM/C 3 EX V- Excitation voltage -ve o/p Operating temperature 0 to 50C 4 HOLD Connect to pin 2 to hold display Storage temperature -10 to 60C 5 EX V+ Excitation voltage +ve o/p Humidity below 85% RH 6 n/c No connection Power consumption 6 VA 7 230V CMRR 110dB 8 115V AC power source 90V FIGURE 1 FRONT VIEW (COVER REMOVED) FIGURE 2 CONNECTING A 2 WIRE SENSOR 8 8 8 8 Excitation ON EDG ON EDG voltage Span adjust (P1) 12 3 4 5 6 7 8 12 3 4 trim (P3) SW1 SW2 Offset trim (P2) Span Offset FIGURE 3 INSTALLATION DIAGRAM FIGURE 4 DIMENSIONS DP8180-2V4 Rev. 4 09/03STEP BY STEP INSTRUCTIONS FIGURE 5 PLAN VIEW SHOWING SWITCH SW3 Remove instrument from protective plastic bag and clip 1 off front cover. Note location of components as per fig. 1. Pull off the three green safety terminals from the rear of 2 the meter. The complete panel meter assembly can now be removed from its case by carefully levering the base of the LED display board over the plastic retaining lug while pushing gently on the terminal pins at the rear. 3 Select the required input format from Table 1 and set the switches on SW3 accordingly (see fig.5). Return the meter assembly to the case and replace the green terminals. SW3 4 Decide the display range required and set the decimal Input point using SW1(1 to 3), according to Table 2. format NOTE If your display is for example 0 - 35.0, then the number of counts (R2) is still 350 for the calculations in step 5 below. 5 For your chosen display range, apply the formulae from Key to tables: 0 = switch OFF position the list below, for your chosen input format. For example, 1 = switch ON position for a 4-20mA input and display range of -100 to 500, the lower reading R1 = -100 (at 4mA) and the upper reading TABLE 1 INPUT FORMAT SETTING R2 = 500 (at 20mA). SW3-1 SW3-2 SW3-3 SW3-4 4-20mA Input format Offset figure (OF) Span figure (SF) 110 0 10-50mA 4-20mA OF=(5xR1 - R2)/4 SF=(R2 - R1)/160 1 - 5V 0 0 1 0 10-50mA OF=(5xR1 - R2)/4 SF=(R2 - R1)/400 0 - 10V 0 0 0 1 1-5V OF=(5xR1 - R2)/4 SF=(R2 - R1)/160 0-10V OF= -R1 SF=(R2 - R1)/200 Note: the offset figure (OF) can have a negative value. TABLE 2 DECIMAL POINT SELECT SETTINGS 6 Using your value for OF, set offset switches SW1(5 to 8) 1-1 2-2 3-3 SW SW SW according to Table 4. Set the polarity switch SW1-4 DP1 100 Table 3 according to the polarity of OF as indicated in . DP2 010 7 Using your value for SF, set span switches SW2(1 to 4) DP3 001 according to Table 5. Make electrical connection to the meter with reference to 8 the Terminal Definition table on page 1. TABLE 3 POLARITY SELECT Apply an accurate lower input signal, e.g. 4mA, and adjust 9 Polarity SW1-4 the offset trim potentiometer (P2) until the display reads Negative 0 . your R1 value Positive 1 Apply an accurate upper input signal, e.g. 20mA and 10 adjust the span trim potentiometer (P3) until the display TABLE 4 OFFSET FIGURE (OF) SETTINGS reads your R2 value. Offset Figure SW1-5 SW1-6 SW1-7 SW1-8 Repeat steps 9 and 10 until consistent readings are 11 0 - 199 0 0 0 0 achieved. 200 - 399 1 0 0 0 12 If you require the excitation output , measure the voltage 400 - 599 0 1 0 0 with an external voltmeter across pins 5 and 3 and adjust 600 - 799 0 0 1 0 to the required voltage using potentiometer P3. 800 - 999 0 0 0 1 1000 - 1199 1 0 0 1 13 When satisfied with the calibration, remove the input 1200 - 1399 0 1 0 1 signal, turn off the auxiliary a.c. power supply and remove all the electrical connections. 1400 - 1599 0 0 1 1 1600 - 1799 1 0 1 1 Clip the cover back on and insert the meter into the panel 14 1800 - 1999 0 1 1 1 cut-out.Sna the mounting clips into the side of the 2000 - 2200 1 1 1 1 case (refer to installation diagram) and tighten the fixing screws until secure in the panel - do not over tighten TABLE 5 SPAN FIGURE (SF) SETTINGS 15 With the meter installed in the panel, re-make the Span Figure SW2-1 SW2-2 SW2-3 SW2-4 electrical connections to the meter with reference to the 0 - 2 0 0 0 0 Terminal Definition Table on page 1. The meter is now 2 - 4 1 0 0 0 ready for use. 4 - 6 0 1 0 0 16 Worked Example Input 4-20mA Display 0-35.0 Kg 6 - 8 0 0 1 0 8 - 10 0 0 0 1 OF=(5xR1 - R2)/4 SF=(R2 - R1)/160 OR=(5x0 - 350)/4 SR=(350 - 0)/160 10 - 12 1 0 0 1 = - 87.5 =2.19 12 - 14 0 1 0 1 Following the step by step instructions the switch 14 - 16 0 0 1 1 positions will be as follows 16 - 18 1 0 1 1 18 - 20 0 1 1 1 sw sw sw sw sw sw sw sw sw sw sw sw sw sw sw sw 20 - 22 1 1 1 1 1-1 1-2 1-3 1-4 1-5 1-6 1-7 1-8 2-1 2-2 2-3 2-4 3-1 3-2 3-3 3-4 off off on off off off off off on off off off on on off off DP8180-2V4 Rev. 4 09/03 DQGHUV HOHFWURQLFV SOF Bayham Place, London NW1 OEU UK Tel: +44 (0)20 7380 8167 Fax: +44 (0)20 7874 1908 www.anders.co.uk A to D Converter Chip ON EDG 12 3 4 12 3 45 6 78 9